2763 lines
105 KiB
Plaintext
2763 lines
105 KiB
Plaintext
GNU Emacs NEWS -- history of user-visible changes.
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Copyright (C) 2022-2024 Free Software Foundation, Inc.
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See the end of the file for license conditions.
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Please send Emacs bug reports to 'bug-gnu-emacs@gnu.org'.
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If possible, use 'M-x report-emacs-bug'.
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This file is about changes in Emacs version 30.
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See file HISTORY for a list of GNU Emacs versions and release dates.
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See files NEWS.29, NEWS.28, ..., NEWS.18, and NEWS.1-17 for changes
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in older Emacs versions.
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You can narrow news to a specific version by calling 'view-emacs-news'
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with a prefix argument or by typing 'C-u C-h C-n'.
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Temporary note:
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+++ indicates that all relevant manuals in doc/ have been updated.
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--- means no change in the manuals is needed.
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When you add a new item, use the appropriate mark if you are sure it
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applies, and please also update docstrings as needed.
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* Installation Changes in Emacs 30.1
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+++
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** Emacs has been ported to the Android operating system.
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This requires Emacs to be compiled on another computer. The Android
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NDK, SDK, and a suitable Java compiler must also be installed.
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See the file 'java/INSTALL' for more details.
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---
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** Native compilation is now enabled by default.
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'configure' will enable the Emacs Lisp native compiler, so long as
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libgccjit is present and functional on the system. To disable native
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compilation, configure Emacs with the option:
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./configure --with-native-compilation=no
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---
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** Emacs now defaults to ossaudio library for sound on NetBSD and OpenBSD.
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Previously configure used ALSA libraries if installed on the
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system when configured '--with-sound=yes' (which is the default), with
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fallback to libossaudio. The libossaudio library included with the
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base system is now used even if ALSA is found to avoid relying on
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external packages and to resolve potential incompatibilities between
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Linux and BSD versions of ALSA. Use '--with-sound=alsa' to build with
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ALSA on these operating systems instead.
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---
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** Native JSON support is now always available; libjansson is no longer used.
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No external library is required. The '--with-json' configure option has
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been removed. 'json-available-p' now always returns non-nil and is only
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kept for compatibility.
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* Startup Changes in Emacs 30.1
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** On GNU/Linux, Emacs is now the default application for 'org-protocol'.
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Org mode provides a way to quickly capture bookmarks, notes, and links
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using 'emacsclient':
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emacsclient "org-protocol://store-link?url=URL&title=TITLE"
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Previously, users had to manually configure their GNU/Linux desktop
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environment to open 'org-protocol' links in Emacs. These links should
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now open in Emacs automatically, as the "emacsclient.desktop" file now
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arranges for Emacs to be the default application for the 'org-protocol'
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URI scheme. See the Org mode manual, Info node "(org) Protocols" for
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more details.
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* Incompatible Changes in Emacs 30.1
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** Mouse wheel events should now always be 'wheel-up/down/left/right'.
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At those places where the old 'mouse-4/5/6/7' events could still occur
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(i.e., X11 input in the absence of XInput2, and 'xterm-mouse-mode'),
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we remap them to the corresponding 'wheel-up/down/left/right' event,
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according to the new variable 'mouse-wheel-buttons'.
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The old variables 'mouse-wheel-up-event', 'mouse-wheel-down-event',
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'mouse-wheel-left-event', and 'mouse-wheel-right-event' are thereby
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obsolete.
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** Tree-Sitter modes are now declared as submodes of the non-TS modes.
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In order to help the use of those Tree-Sitter modes, they are now
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declared to have the corresponding non-Tree-Sitter mode as an
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additional parent.
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This way, things like ".dir-locals.el" settings, and YASnippet
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collections of snippets automatically apply to the new Tree-Sitter modes.
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Note that those modes still do not inherit from the non-TS mode, so
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configuration settings installed via mode hooks are not affected.
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+++
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** URL now never sends user email addresses in HTTP requests.
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Emacs never sent email addresses by default, but it used to be
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possible to customize 'url-privacy-level' so that the users email
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address was sent along in HTTP requests. This feature has now been
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removed, as it was considered more dangerous than useful. RFC 9110
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(§ 10.1.2) also recommends against it. The user option
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'url-personal-mail-address' is now also obsolete.
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To send an email address in the header of individual HTTP requests,
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see the variable 'url-request-extra-headers'.
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+++
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** 'completion-auto-help' now affects 'icomplete-in-buffer'.
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Previously, 'completion-auto-help' mostly affected only minibuffer
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completion. Now, if 'completion-auto-help' has the value 'lazy', then
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Icomplete's in-buffer display of possible completions will only appear
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after the 'completion-at-point' command has been invoked twice, and if
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'completion-auto-help' is nil, then Icomplete's in-buffer display is
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completely suppressed. Thus, if you use 'icomplete-in-buffer', ensure
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'completion-auto-help' is not customized to 'lazy' or nil.
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+++
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** The "*Completions*" buffer now always accompanies 'icomplete-in-buffer'.
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Previously, it was not consistent whether the "*Completions*" buffer would
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appear when using 'icomplete-in-buffer'. Now the "*Completions*" buffer
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and Icomplete's in-buffer display of possible completions always
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appear together. If you would prefer to see only Icomplete's
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in-buffer display, and not the "*Completions*" buffer, you can add this
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to your init:
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(advice-add 'completion-at-point :after #'minibuffer-hide-completions)
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* Changes in Emacs 30.1
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** 'describe-function' now shows the type of the function object.
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The text used to say things like "car is is a built-in function"
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whereas it now says "car is a primitive-function" where "primitive-function"
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is the symbol returned by 'cl-type-of' and you can click on it to get
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information about that type.
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** 'advice-remove' is now an interactive command.
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When called interactively, 'advice-remove' now prompts for an advised
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function to the advice to remove.
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** Emacs now supports Unicode Standard version 15.1.
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** Network Security Manager
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+++
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*** The Network Security Manager now warns about 3DES by default.
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This cypher is no longer recommended owing to a major vulnerability
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disclosed in 2016, and its small 112 bit key size. Emacs now warns
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about its use also when 'network-security-level' is set to 'medium'
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(the default). See 'network-security-protocol-checks'.
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---
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*** The Network Security Manager now warns about <2048 bits in DH key exchange.
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Emacs used to warn for Diffie-Hellman key exchanges with prime numbers
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smaller than 1024 bits. Since more servers now support it, this
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number has been bumped to 2048 bits.
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** Help
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*** 'describe-function' shows function inferred type when available.
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For native compiled Lisp functions 'describe-function' prints (after
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the signature) the automatically inferred function type as well.
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---
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*** New user option 'describe-bindings-outline-rules'.
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This user option controls outline visibility in the output buffer of
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'describe-bindings' when 'describe-bindings-outline' is non-nil.
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---
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*** 'C-h m' ('describe-mode') uses outlining by default.
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Set 'describe-mode-outline' to nil to get back the old behavior.
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** Outline mode
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+++
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*** 'outline-minor-mode' is supported in tree-sitter major modes.
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It can be used in all tree-sitter major modes that set either the
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variable 'treesit-simple-imenu-settings' or 'treesit-outline-predicate'.
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** X selection requests are now handled much faster and asynchronously.
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This means it should be less necessary to disable the likes of
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'select-active-regions' when Emacs is running over a slow network
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connection.
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** Emacs now updates invisible frames that are made visible by a compositor.
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If an invisible or an iconified frame is shown to the user by the
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compositing manager, Emacs will now redisplay such a frame even though
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'frame-visible-p' returns nil or 'icon' for it. This can happen, for
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example, as part of preview for iconified frames.
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---
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** New user option 'menu-bar-close-window'.
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When non-nil, selecting "Close" from the "File" menu or clicking
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"Close" in the tool bar will result in the current window being
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closed, if possible.
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+++
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** 'write-region-inhibit-fsync' now defaults to t in interactive mode,
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as it has in batch mode since Emacs 24.
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+++
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** New user option 'remote-file-name-inhibit-delete-by-moving-to-trash'.
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When non-nil, this option suppresses moving remote files to the local
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trash when deleting. Default is nil.
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---
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** New user option 'remote-file-name-inhibit-auto-save'.
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If this user option is non-nil, 'auto-save-mode' will not auto-save
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remote buffers. The default is nil.
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+++
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** New user option 'remote-file-name-access-timeout'.
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When a positive number, this option limits the call of 'access-file'
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for remote files to this number of seconds. Default is nil.
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+++
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** New user option 'yes-or-no-prompt'.
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This allows the user to customize the prompt that is appended by
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'yes-or-no-p' when asking questions. The default value is
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"(yes or no) ".
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---
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** New face 'display-time-date-and-time'.
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This is used for displaying the time and date components of
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'display-time-mode'.
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---
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** New icon images for general use.
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Several symbolic icons are added to "etc/images/symbols", including
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plus, minus, check-mark, start, etc.
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+++
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** Tool bars can now be placed on the bottom on more systems.
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The 'tool-bar-position' frame parameter can be set to 'bottom' on all
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window systems other than Nextstep.
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+++
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** New global minor mode 'modifier-bar-mode'.
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When this minor mode is enabled, buttons representing modifier keys
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are displayed along the tool bar.
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+++
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** "d" in the mode line now indicates that the window is dedicated.
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Windows have always been able to be dedicated to a specific buffer;
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see 'window-dedicated-p'. Now the mode line indicates the dedicated
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status of a window, with "d" appearing in the mode line if a window is
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dedicated and "D" if the window is strongly dedicated. This indicator
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appears before the buffer name, and after the buffer modification and
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remote buffer indicators (usually "---" together).
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+++
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** New command 'toggle-window-dedicated'.
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This makes it easy to interactively mark a specific window as
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dedicated, so it won't be reused by 'display-buffer'. This can be
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useful for complicated window setups. It is bound to 'C-x w d'
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globally.
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---
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** New user option 'uniquify-dirname-transform'.
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This can be used to customize how buffer names are uniquified, by
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making arbitrary transforms on the buffer's directory name (whose
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components are used to uniquify buffer names when they clash). You
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can use this to distinguish between buffers visiting files with the
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same base name that belong to different projects by using the provided
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transform function 'project-uniquify-dirname-transform'.
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** 'insert-directory-program' is now a user option.
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On *BSD and macOS systems, this user option now defaults to the "gls"
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executable, if it exists. This should remove the need to change its
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value when installing GNU coreutils using something like ports or
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Homebrew.
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+++
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** CL Print
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+++
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*** You can expand the "..." truncation everywhere.
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The code that allowed "..." to be expanded in the "*Backtrace*" buffer
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should now work anywhere the data is generated by 'cl-print'.
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+++
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*** The 'backtrace-ellipsis' button is replaced by 'cl-print-ellipsis'.
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+++
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*** hash-tables' contents can be expanded via the ellipsis.
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+++
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*** Modes can control the expansion via 'cl-print-expand-ellipsis-function'.
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+++
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*** New setting 'raw' for 'cl-print-compiled'.
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This setting causes byte-compiled functions to be printed in full by
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'prin1'. A button on this output can be activated to disassemble the
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function.
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+++
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*** There is a new chapter in the CL manual documenting cl-print.el.
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See the Info node "(cl) Printing".
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** Modeline elements can now be right-aligned.
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Anything following the symbol 'mode-line-format-right-align' in
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'mode-line-format' will be right-aligned. Exactly where it is
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right-aligned to is controlled by the new user option
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'mode-line-right-align-edge'.
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** Windows
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+++
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*** New action alist entry 'category' for 'display-buffer'.
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If the caller of 'display-buffer' passes '(category . symbol)'
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in its 'action' argument, you can match the displayed buffer
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by adding '(category . symbol)' to the condition part of
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'display-buffer-alist' entries.
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+++
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*** New action alist entry 'post-command-select-window' for 'display-buffer'.
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It specifies whether the window of the displayed buffer should be
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selected or deselected at the end of executing the current command.
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---
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*** User option 'display-comint-buffer-action' is now obsolete.
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You can use a '(category . comint)' condition in 'display-buffer-alist'
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to match buffers displayed by comint-related commands. Another
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user option 'display-tex-shell-buffer-action' is obsolete too
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for which you can use '(category . tex-shell)'.
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+++
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*** New variable 'window-restore-killed-buffer-windows'.
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It specifies how 'set-window-configuration' and 'window-state-put'
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should proceed with windows whose buffer was killed after the
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corresponding configuration or state was recorded.
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*** New variable 'window-point-context-set-function'.
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It can be used to set a context for window point in all windows by
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'window-point-context-set' before calling 'current-window-configuration'
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and 'window-state-get'. Then later another new variable
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'window-point-context-use-function' can be used by
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'window-point-context-use' after 'set-window-configuration' and
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'window-state-put' to restore positions of window points
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according to the context stored in a window parameter.
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+++
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*** New functions 'set-window-cursor-type' and 'window-cursor-type'.
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'set-window-cursor-type' sets a per-window cursor type, and
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'window-cursor-type' queries this setting for a given window. Windows
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are always created with a 'window-cursor-type' of t, which means to
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consult the variable 'cursor-type' as before.
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** Tab Bars and Tab Lines
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---
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*** New user option 'tab-bar-select-restore-context'.
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It uses 'window-point-context-set' to save contexts where
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window points were located before switching away from the tab,
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and 'window-point-context-use' to restore positions of window
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points after switching back to that tab.
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---
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*** New user option 'tab-bar-select-restore-windows'.
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It defines what to do with windows whose buffer was killed since the tab
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was last selected. By default it displays a placeholder buffer
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with the name " *Old buffer <name>*" that provides information about
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the name of the killed buffer that was displayed in that window.
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---
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*** New user option 'tab-bar-tab-name-format-functions'.
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It can be used to add, remove and reorder functions that change the
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appearance of every tab on the tab bar.
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---
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*** New hook 'tab-bar-tab-post-select-functions'.
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---
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*** New keymap 'tab-bar-mode-map'.
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By default it contains a keybinding 'C-TAB' to switch tabs, but only
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when 'C-TAB' is not bound globally. You can unbind it if it conflicts
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with 'C-TAB' in other modes.
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---
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*** New keymap 'tab-line-mode-map'.
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By default it contains keybindings for switching tabs: 'C-x <left>',
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'C-x <right>', 'C-x C-<left>', 'C-x C-<right>'. You can unbind them if
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you want to use these keys for the commands 'previous-buffer' and
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'next-buffer'.
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||
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---
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*** Default list of tabs is changed to support a fixed order.
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This means that 'tab-line-tabs-fixed-window-buffers', the new default
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tabs function, is like the previous 'tab-line-tabs-window-buffers' where
|
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both of them show only buffers that were previously displayed in the
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window. But the difference is that the new function always keeps the
|
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original order of buffers on the tab line, even after switching between
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these buffers. You can drag the tabs and release at a new position
|
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to manually reorder the buffers on the tab line.
|
||
|
||
---
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*** New user option 'tab-line-tabs-buffer-group-function'.
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It provides two choices to group tab buffers by major mode and by
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project name.
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||
|
||
---
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*** Buffers on group tabs are now sorted alphabetically.
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||
This will keep the fixed order of tabs, even after switching between
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them.
|
||
|
||
+++
|
||
** New optional argument for modifying directory-local variables.
|
||
The commands 'add-dir-local-variable', 'delete-dir-local-variable' and
|
||
'copy-file-locals-to-dir-locals' now take an optional prefix argument,
|
||
to enter the file name you want to modify.
|
||
|
||
** Emacs Server and Client
|
||
|
||
---
|
||
*** 'server-eval-args-left' can be used to pop and eval subsequent args.
|
||
When '--eval' is passed to emacsclient and Emacs is evaluating each
|
||
argument, this variable is set to those arguments not yet evaluated.
|
||
It can be used to 'pop' arguments and process them by the function
|
||
called in the '--eval' expression, which is useful when those
|
||
arguments contain arbitrary characters that otherwise might require
|
||
elaborate and error-prone escaping (to protect them from the shell).
|
||
|
||
+++
|
||
** 'recover-file' can show diffs between auto save file and current file.
|
||
When answering the prompt with "diff" or "=", it now shows the diffs
|
||
between the auto save file and the current file.
|
||
|
||
---
|
||
** 'ffap-lax-url' now defaults to nil.
|
||
Previously, it was set to t but this broke remote file name detection.
|
||
|
||
+++
|
||
** Multi-character key echo now ends with a suggestion to use Help.
|
||
Customize 'echo-keystrokes-help' to nil to prevent that.
|
||
|
||
+++
|
||
** 'read-passwd' can toggle the visibility of passwords.
|
||
Use 'TAB' in the minibuffer to show or hide the password. Likewise,
|
||
there is an icon on the mode-line, which toggles the visibility of the
|
||
password when clicking with 'mouse-1'.
|
||
|
||
+++
|
||
** Support for styled underline face attributes.
|
||
These are implemented as new values of the 'style' attribute in a face
|
||
underline specification, 'double-line', 'dots', and 'dashes', and are
|
||
available on GUI systems. If your terminal's termcap or terminfo
|
||
database entry defines the 'Su' or 'Smulx' capability, Emacs will also
|
||
emit the prescribed escape sequence to render faces with such styles on
|
||
TTY frames.
|
||
|
||
---
|
||
** Support for underline colors on TTY frames.
|
||
Colors specified in face underlines will now also be displayed in TTY
|
||
frames with the previously mentioned capabilities.
|
||
|
||
** Miscellaneous
|
||
|
||
---
|
||
*** New face 'appt-notification' for 'appt-display-mode-line'.
|
||
It can be used to customize the look of the appointment notification
|
||
displayed on the mode line when 'appt-display-mode-line' is non-nil.
|
||
|
||
---
|
||
*** Emacs now recognizes shebang lines that pass '-S'/'--split-string' to 'env'.
|
||
When visiting a script that invokes 'env -S INTERPRETER ARGS...' in
|
||
its shebang line, Emacs will now skip over 'env -S' and deduce the
|
||
major mode based on the interpreter after 'env -S'.
|
||
|
||
|
||
* Editing Changes in Emacs 30.1
|
||
|
||
+++
|
||
** New minor mode 'visual-wrap-prefix-mode'.
|
||
When enabled, continuation lines displayed for a wrapped long line
|
||
will receive a 'wrap-prefix' automatically computed from the line's
|
||
surrounding context, such that continuation lines are indented on
|
||
display as if they were filled with 'M-q' or similar. Unlike 'M-q',
|
||
the indentation only happens on display, and doesn't change the buffer
|
||
text in any way. The global minor mode
|
||
'global-visual-wrap-prefix-mode' enables this minor mode in all
|
||
buffers.
|
||
|
||
(This minor mode is the 'adaptive-wrap' ELPA package renamed and
|
||
lightly edited for inclusion in Emacs.)
|
||
|
||
+++
|
||
** New user option 'gud-highlight-current-line'.
|
||
When enabled, Gud will visually emphasize the line being executed upon
|
||
pauses in the debugee's execution, such as those occasioned by
|
||
breakpoints being hit.
|
||
|
||
---
|
||
** New global minor mode 'kill-ring-deindent-mode'.
|
||
When enabled, text being saved to the kill ring will be de-indented by
|
||
the column number at its start. For example, saving the entire
|
||
function call within:
|
||
|
||
foo ()
|
||
{
|
||
long_function_with_several_arguments (argument_1_compute (),
|
||
argument_2_compute (),
|
||
argument_3_compute ());
|
||
}
|
||
|
||
will save:
|
||
|
||
long_function_with_several_arguments (argument_1_compute (),
|
||
argument_2_compute (),
|
||
argument_3_compute ())
|
||
|
||
to the kill ring, omitting the two columns of extra indentation that
|
||
would otherwise be present in the second and third lines of the
|
||
function call.
|
||
|
||
+++
|
||
** Emacs now has better support for touchscreen devices.
|
||
Many touch screen gestures are now implemented and translated into
|
||
mouse or gesture events, and support for tapping tool bar buttons and
|
||
opening menus has been written. Countless packages, such as Dired and
|
||
Custom have been adjusted to better understand touch screen input.
|
||
|
||
---
|
||
** On X, Emacs now supports input methods which perform "string conversion".
|
||
This means an input method can now ask Emacs to delete text
|
||
surrounding point and replace it with something else, as well as query
|
||
Emacs for surrounding text. If your input method allows you to "undo"
|
||
mistaken compositions, this will now work as well.
|
||
|
||
---
|
||
** New command 'kill-matching-buffers-no-ask'.
|
||
This works like 'kill-matching-buffers', but without asking for
|
||
confirmation.
|
||
|
||
---
|
||
** New user option 'duplicate-region-final-position'.
|
||
It controls the placement of point and the region after duplicating a
|
||
region with 'duplicate-dwim'.
|
||
|
||
+++
|
||
** New user option 'mouse-prefer-closest-glyph'.
|
||
When enabled, clicking or dragging with the mouse will put the point
|
||
or start the drag in front of the buffer position corresponding to the
|
||
glyph with the closest X coordinate to the click or start of the drag.
|
||
In other words, if the mouse pointer is in the right half of a glyph,
|
||
point will be put after the buffer position corresponding to that glyph,
|
||
whereas if the mouse pointer is in the left half of a glyph, point
|
||
will be put in front the buffer position corresponding to that glyph.
|
||
By default this is disabled.
|
||
|
||
** Internationalization
|
||
|
||
---
|
||
*** Users in CJK locales can control width of some non-CJK characters.
|
||
Some characters are considered by Unicode as "ambiguous" with respect
|
||
to their display width: either "full-width" (i.e., taking 2 columns on
|
||
display) or "narrow" (taking 1 column). The actual width depends on
|
||
the fonts used for these characters by Emacs or (for text-mode frames)
|
||
by the terminal emulator. Traditionally, font sets in CJK locales
|
||
were set up so as to display these characters as full-width, and thus
|
||
Emacs modified the char-width table in those locales to follow suit.
|
||
Lately, the tendency is to display these characters as narrow. The
|
||
new user option 'cjk-ambiguous-chars-are-wide' allows users to control
|
||
whether Emacs considers these characters as full-width (the default)
|
||
or narrow (if the variable is customized to the nil value).
|
||
|
||
This setting affects the results of 'string-width' and similar
|
||
functions in CJK locales.
|
||
|
||
---
|
||
*** New input methods for the Urdu, Pashto, and Sindhi languages.
|
||
These languages are spoken in Pakistan and Afghanistan.
|
||
|
||
---
|
||
*** New input method "english-colemak".
|
||
This input method supports the Colemak keyboard layout.
|
||
|
||
*** Additional 'C-x 8' key translations for "æ" and "Æ".
|
||
These characters can now be input with 'C-x 8 a e' and 'C-x 8 A E',
|
||
respectively, in addition to the existing translations 'C-x 8 / e' and
|
||
'C-x 8 / E'.
|
||
|
||
|
||
* Changes in Specialized Modes and Packages in Emacs 30.1
|
||
|
||
---
|
||
** Titdic-cnv
|
||
Most of the variables and functions in the file have been renamed to
|
||
make sure they all use a 'tit-' namespace prefix.
|
||
|
||
---
|
||
** Trace
|
||
In batch mode, tracing now sends the trace to stdout.
|
||
|
||
+++
|
||
** Mwheel
|
||
The 'wheel-up/down/left/right' events are now bound unconditionally,
|
||
and the 'mouse-wheel-up/down/left/right-event' variables are thus used
|
||
only to specify the 'mouse-4/5/6/7' events that might still
|
||
happen to be generated by some old packages (or if 'mouse-wheel-buttons'
|
||
has been set to nil).
|
||
|
||
** Xterm Mouse mode
|
||
This mode now emits 'wheel-up/down/right/left' events instead of
|
||
'mouse-4/5/6/7' events for the mouse wheel.
|
||
It uses the new variable 'mouse-wheel-buttons' to decide which button
|
||
maps to which wheel event (if any).
|
||
|
||
** Info
|
||
|
||
---
|
||
*** New user option 'Info-url-alist'.
|
||
This user option associates manual names with URLs. It affects the
|
||
'Info-goto-node-web' command. By default, associations for all
|
||
Emacs-included manuals are set. Further associations can be added for
|
||
arbitrary Info manuals.
|
||
|
||
*** Emacs can now display Info manuals compressed with 'lzip'.
|
||
This requires the 'lzip' program to be installed on your system.
|
||
|
||
+++
|
||
** New command 'lldb'.
|
||
Run the LLDB debugger, analogous to the 'gud-gdb' command.
|
||
|
||
** GDB MI
|
||
|
||
---
|
||
*** Variable order and truncation can now be configured in 'gdb-many-windows'.
|
||
The new user option 'gdb-locals-table-row-config' allows users to
|
||
configure the order and max length of various properties in the local
|
||
variables buffer when using 'gdb-many-windows'.
|
||
|
||
By default, this user option is set to write the properties in the order:
|
||
name, type and value, where the name and type are truncated to 20
|
||
characters, and the value is truncated according to the value of
|
||
'gdb-locals-value-limit'.
|
||
|
||
If you want to get back the old behavior, set the user option to the value
|
||
|
||
(setopt gdb-locals-table-row-config
|
||
`((type . 0) (name . 0) (value . ,gdb-locals-value-limit)))
|
||
|
||
---
|
||
*** New user option 'gdb-display-io-buffer'.
|
||
If this is nil, 'M-x gdb' will neither create nor display a separate
|
||
buffer for the I/O of the program being debugged, but will instead
|
||
redirect the program's interaction to the GDB execution buffer. The
|
||
default is t, to preserve previous behavior.
|
||
|
||
** Grep
|
||
|
||
*** New user option 'grep-use-headings'.
|
||
When non-nil, the output of Grep is split into sections, one for each
|
||
file, instead of having file names prefixed to each line. It is
|
||
equivalent to the "--heading" option of some tools such as 'git grep'
|
||
and 'rg'. The headings are displayed using the new 'grep-heading'
|
||
face.
|
||
|
||
** Compilation mode
|
||
|
||
---
|
||
*** The 'omake' matching rule is now disabled by default.
|
||
This is because it partly acts by modifying other rules which may
|
||
occasionally be surprising. It can be re-enabled by adding 'omake' to
|
||
'compilation-error-regexp-alist'.
|
||
|
||
*** Lua errors and stack traces are now recognized.
|
||
Compilation mode now recognizes Lua language errors and stack traces.
|
||
Every Lua error is recognized as a compilation error, and every Lua
|
||
stack frame is recognized as a compilation info.
|
||
|
||
** Project
|
||
|
||
+++
|
||
*** New user option 'project-mode-line'.
|
||
When non-nil, display the name of the current project on the mode
|
||
line. Clicking 'mouse-1' on the project name pops up the project
|
||
menu. The default value is nil.
|
||
|
||
*** New user option 'project-file-history-behavior'.
|
||
Customizing it to 'relativize' makes commands like 'project-find-file'
|
||
and 'project-find-dir' display previous history entries relative to
|
||
the current project.
|
||
|
||
*** New user option 'project-key-prompt-style'.
|
||
The look of the key prompt in the project switcher has been changed
|
||
slightly. To get the previous one, set this option to 'brackets'.
|
||
|
||
*** 'project-try-vc' tries harder to find the responsible VCS.
|
||
When 'project-vc-extra-root-markers' is non-nil, and causes a
|
||
subdirectory project to be detected which is not a VCS root, we now
|
||
additionally traverse the parent directories until a VCS root is found
|
||
(if any), so that the ignore rules for that repository are used, and
|
||
the file listing's performance is still optimized.
|
||
|
||
*** New commands 'project-any-command' and 'project-prefix-or-any-command'.
|
||
The former is now bound to 'C-x p o' by default.
|
||
The latter is designed primarily for use as a value of
|
||
'project-switch-commands'. If instead of a short menu you prefer to
|
||
have access to all keys defined inside 'project-prefix-map', as well
|
||
as global bindings (to run other commands inside the project root),
|
||
you can add this to your init script:
|
||
|
||
(setopt project-switch-commands #'project-prefix-or-any-command)
|
||
|
||
---
|
||
*** New variable 'project-files-relative-names'.
|
||
If it's non-nil, 'project-files' can return file names relative to the
|
||
project root. Project backends can use this to improve the performance
|
||
of their 'project-files' implementation.
|
||
|
||
** VC
|
||
|
||
---
|
||
*** Log-Edit buffers now display a tool bar.
|
||
This tool bar contains items for committing log entries and editing or
|
||
generating log entries, among other editing operations.
|
||
|
||
---
|
||
*** New user option 'vc-git-shortlog-switches'.
|
||
This is a string or a list of strings that specifies the Git log
|
||
switches for shortlogs, such as the one produced by 'C-x v L'.
|
||
'vc-git-log-switches' is no longer used for shortlogs.
|
||
|
||
---
|
||
*** New value 'no-backend' for user option 'vc-display-status'.
|
||
With this value only the revision number is displayed on the mode-line.
|
||
|
||
---
|
||
*** Obsolete command 'vc-switch-backend' re-added as 'vc-change-backend'.
|
||
The command was previously obsoleted and unbound in Emacs 28.
|
||
|
||
*** Support for viewing VC change history across renames.
|
||
When a fileset's VC change history ('C-x v l') ends at a rename, we
|
||
now print the old name(s) and a button which jumps to their history.
|
||
Git and Hg are supported. Naturally, 'vc-git-print-log-follow' should
|
||
be nil for this to work (or '--follow' should not be in
|
||
'vc-hg-print-log-switches', in Hg's case). Unlike when the '--follow'
|
||
switch is used, commands to see the diff of the old revision ('d'),
|
||
check out an old file version ('f') or annotate it right away ('a'),
|
||
also work on revisions which precede renames.
|
||
|
||
---
|
||
*** 'vc-annotate' now abbreviates the Git revision in the buffer name.
|
||
When using the Git backend, 'vc-annotate' will use an abbreviated
|
||
revision identifier in its buffer name. To restore the previous
|
||
behavior, set 'vc-annotate-use-short-revision' to nil.
|
||
|
||
*** New option 'vc-git-file-name-changes-switches'.
|
||
It allows tweaking the thresholds for rename and copy detection.
|
||
|
||
** Diff mode
|
||
|
||
---
|
||
*** New user option 'diff-refine-nonmodified'.
|
||
When this is non-nil, 'diff-refine' will highlight lines that were added
|
||
or removed in their entirety (as opposed to modified lines, where some
|
||
parts of the line were modified), using the same faces as for
|
||
highlighting the words added and removed within modified lines. The
|
||
default value is nil.
|
||
|
||
+++
|
||
*** 'diff-ignore-whitespace-hunk' can now be applied to all hunks.
|
||
When called with a non-nil prefix argument,
|
||
'diff-ignore-whitespace-hunk' now iterates over all the hunks in the
|
||
current diff, regenerating them without whitespace changes.
|
||
|
||
+++
|
||
*** New user option 'diff-ignore-whitespace-switches'.
|
||
This allows changing which type of whitespace changes are ignored when
|
||
regenerating hunks with 'diff-ignore-whitespace-hunk'. Defaults to
|
||
the previously hard-coded "-b".
|
||
|
||
*** New command 'diff-apply-buffer' bound to 'C-c RET a'.
|
||
It applies the diff in the entire diff buffer and
|
||
saves all modified file buffers.
|
||
|
||
** Isearch and Replace
|
||
|
||
*** New command 'replace-regexp-as-diff'.
|
||
It reads a regexp to search for and a string to replace with, then
|
||
displays a buffer with replacements as diffs. After reviewing the
|
||
changes in the output buffer you can apply the replacements as
|
||
a patch to the current file buffer. There are also new commands
|
||
'multi-file-replace-regexp-as-diff' that shows as diffs replacements
|
||
in a list of specified files, and 'dired-do-replace-regexp-as-diff'
|
||
that shows as diffs replacements in the marked files in Dired.
|
||
|
||
** Dired
|
||
|
||
---
|
||
*** New user option 'dired-movement-style'.
|
||
When non-nil, make 'dired-next-line', 'dired-previous-line',
|
||
'dired-next-dirline', 'dired-prev-dirline' skip empty lines.
|
||
It also controls how to move point when encountering a boundary
|
||
(e.g., if every line is visible, invoking 'dired-next-line' at
|
||
the last line will move to the first line). The default is nil.
|
||
|
||
*** New user option 'dired-filename-display-length'.
|
||
It is an integer representing the maximum display length of filenames.
|
||
The middle part of a filename whose length exceeds the restriction is
|
||
hidden and an ellipsis is displayed instead. A value of 'window'
|
||
means using the right edge of window as the display restriction. The
|
||
default is nil.
|
||
|
||
*** New user option 'shell-command-guess-functions'.
|
||
It defines how to populate a list of commands available
|
||
for 'M-!', 'M-&', '!', '&' and the context menu "Open With"
|
||
based on marked files in Dired. Possible backends are
|
||
'dired-guess-default', MIME types, XDG configuration
|
||
and a universal command such as "open" or "start"
|
||
that delegates to the OS.
|
||
|
||
*** New command 'dired-do-open'.
|
||
This command is bound to "Open" in the context menu; it "opens" the
|
||
marked or clicked on files according to the OS conventions. For
|
||
example, on systems supporting XDG, this runs 'xdg-open' on the
|
||
files.
|
||
|
||
*** The default value of 'dired-omit-size-limit' was increased.
|
||
After performance improvements to omitting in large directories, the new
|
||
default value is 300k, up from 100k. This means 'dired-omit-mode' will
|
||
omit files in directories whose directory listing is up to 300 kilobytes
|
||
in size.
|
||
|
||
+++
|
||
*** 'dired-listing-switches' handles connection-local values if exist.
|
||
This allows to customize different switches for different remote machines.
|
||
|
||
** Registers
|
||
|
||
+++
|
||
*** New mode of prompting for register names and showing preview.
|
||
The new user option 'register-use-preview' can be customized to the
|
||
value t or insist to request a different user interface of prompting for
|
||
register names and previewing the registers: Emacs will require
|
||
confirmation for overwriting the value of a register, and will show
|
||
the preview of registers without delay. You can also customize this
|
||
new option to disable the preview completely.
|
||
|
||
The default value of 'register-use-preview' preserves the behavior of
|
||
Emacs 29 and before. See the Info node "(emacs) Registers" for more
|
||
details about the new UI and its variants.
|
||
|
||
** Ediff
|
||
|
||
---
|
||
*** New user option 'ediff-floating-control-frame'.
|
||
If non-nil, try making the control frame be floating rather than tiled.
|
||
|
||
Many X tiling window managers make the Ediff control frame a tiled
|
||
window equal in size to the main Emacs frame, which works poorly.
|
||
This option is useful to set if you use such a window manager.
|
||
|
||
** Buffer Selection
|
||
|
||
---
|
||
*** New user option 'bs-default-action-list'.
|
||
You can now configure how to display the "*buffer-selection*" buffer
|
||
using this new option. (Or set 'display-buffer-alist' directly.)
|
||
|
||
** Eshell
|
||
|
||
+++
|
||
*** New builtin Eshell command 'compile'.
|
||
This command runs another command, sending its output to a compilation
|
||
buffer when the command would output interactively. This can be useful
|
||
when defining aliases so that they produce a compilation buffer when
|
||
appropriate, but still allow piping the output elsewhere if desired.
|
||
For more information, see the "(eshell) Built-ins" node in the Eshell
|
||
manual.
|
||
|
||
+++
|
||
*** Eshell's 'env' command now supports running commands.
|
||
Like in many other shells, Eshell's 'env' command now lets you run a
|
||
command passed as arguments to 'env'. If you pass any initial
|
||
arguments of the form 'VAR=VALUE', 'env' will first set 'VAR' to
|
||
'VALUE' before running the command.
|
||
|
||
---
|
||
*** Eshell's 'umask' command now supports setting the mask symbolically.
|
||
Now, you can pass an argument like "u+w,o-r" to Eshell's 'umask'
|
||
command, which will give write permission for owners of newly-created
|
||
files and deny read permission for users who are not members of the
|
||
file's group. See the Info node "(coreutils) File permissions" for
|
||
more information on this notation.
|
||
|
||
+++
|
||
*** New special reference type '#<marker POSITION BUFFER>'.
|
||
This special reference type returns a marker at 'POSITION' in
|
||
'BUFFER'. You can insert it by typing or using the new interactive
|
||
command 'eshell-insert-marker'. You can also insert special
|
||
references of any type using the new interactive command
|
||
'eshell-insert-special-reference'. See the "(eshell) Arguments" node
|
||
in the Eshell manual for more details.
|
||
|
||
+++
|
||
*** New splice operator for Eshell dollar expansions.
|
||
Dollar expansions in Eshell now let you splice the elements of the
|
||
expansion in-place using '$@expr'. This makes it easier to fill lists
|
||
of arguments into a command, such as when defining aliases. For more
|
||
information, see the "(eshell) Dollars Expansion" node in the Eshell
|
||
manual.
|
||
|
||
+++
|
||
*** You can now splice Eshell globs in-place into argument lists.
|
||
By setting 'eshell-glob-splice-results' to a non-nil value, Eshell
|
||
will expand glob results in-place as if you had typed each matching
|
||
file name individually. For more information, see the "(eshell)
|
||
Globbing" node in the Eshell manual.
|
||
|
||
+++
|
||
*** Eshell now supports negative numbers and ranges for indices.
|
||
Now, you can retrieve the last element of a list with '$my-list[-1]'
|
||
or get a sublist of elements 2 through 4 with '$my-list[2..5]'. For
|
||
more information, see the "(eshell) Dollars Expansion" node in the
|
||
Eshell manual.
|
||
|
||
+++
|
||
*** Eshell commands can now be explicitly-remote (or local).
|
||
By prefixing a command name in Eshell with a remote identifier, like
|
||
"/ssh:user@remote:whoami", you can now run commands on a particular
|
||
host no matter your current directory. Likewise, you can run a
|
||
command on your local system no matter your current directory via
|
||
"/local:whoami". For more information, see the "(eshell) Remote Access"
|
||
node in the Eshell manual.
|
||
|
||
+++
|
||
*** Eshell's '$UID' and '$GID' variables are now connection-aware.
|
||
Now, when expanding '$UID' or '$GID' in a remote directory, the value
|
||
is the user or group ID associated with the remote connection.
|
||
|
||
---
|
||
*** Eshell now uses 'field' properties in its output.
|
||
In particular, this means that pressing the '<home>' key moves the
|
||
point to the beginning of your input, not the beginning of the whole
|
||
line. If you want to go back to the old behavior, add something like
|
||
this to your configuration:
|
||
|
||
(keymap-set eshell-mode-map "<home>" #'eshell-bol-ignoring-prompt)
|
||
|
||
This also means you no longer need to adjust 'eshell-prompt-regexp'
|
||
when customizing your Eshell prompt.
|
||
|
||
---
|
||
*** You can now properly unload Eshell.
|
||
Calling '(unload-feature 'eshell)' no longer signals an error, and now
|
||
correctly unloads Eshell and all of its modules.
|
||
|
||
+++
|
||
*** 'eshell-read-aliases-list' is now an interactive command.
|
||
After manually editing 'eshell-aliases-file', you can use this command
|
||
to load the edited aliases.
|
||
|
||
+++
|
||
*** 'rgrep' is now a builtin command.
|
||
Running 'rgrep' in Eshell now uses the Emacs grep facility instead of
|
||
calling external rgrep.
|
||
|
||
+++
|
||
*** If a command exits abnormally, the Eshell prompt now shows its exit code.
|
||
|
||
+++
|
||
*** New user option 'eshell-history-append'.
|
||
If non-nil, each Eshell session will save history by appending new
|
||
entries of that session to the history file rather than overwriting
|
||
the file with the whole history of the session. The default is nil.
|
||
|
||
** Minibuffer and Completions
|
||
|
||
*** New commands 'previous-line-completion' and 'next-line-completion'.
|
||
Bound to '<up>' and '<down>' arrow keys, respectively, they navigate
|
||
the "*Completions*" buffer vertically by lines, wrapping at the
|
||
top/bottom when 'completion-auto-wrap' is non-nil.
|
||
|
||
*** New user option 'minibuffer-visible-completions'.
|
||
When customized to non-nil, you can use arrow keys in the minibuffer
|
||
to navigate the completions displayed in the "*Completions*" window.
|
||
Typing 'RET' selects the highlighted candidate. 'C-g' hides the
|
||
completions window. When the completions window is not visible,
|
||
then all these keys have their usual meaning in the minibuffer.
|
||
This option is supported for in-buffer completion as well.
|
||
|
||
*** Selected completion candidates are deselected on typing.
|
||
When you type at the minibuffer prompt, the current completion
|
||
candidate will be un-highlighted, and point in the "*Completions*" window
|
||
will be moved off that candidate. 'minibuffer-choose-completion'
|
||
('M-RET') will still choose a previously-selected completion
|
||
candidate, but the new command 'minibuffer-choose-completion-or-exit'
|
||
(bound to 'RET' by 'minibuffer-visible-completions') will exit with
|
||
the minibuffer contents instead. This deselection behavior can be
|
||
controlled with the new user option 'completion-auto-deselect', which
|
||
is t by default.
|
||
|
||
*** New value 'historical' for user option 'completions-sort'.
|
||
When 'completions-sort' is set to 'historical', completion candidates
|
||
will be first sorted alphabetically, and then re-sorted by their order
|
||
in the minibuffer history, with more recent candidates appearing first.
|
||
|
||
+++
|
||
*** 'completion-category-overrides' supports more metadata.
|
||
The new supported completion properties are 'cycle-sort-function',
|
||
'display-sort-function', 'annotation-function', 'affixation-function',
|
||
and 'group-function'. You can now customize them for any category in
|
||
'completion-category-overrides' that will override the properties
|
||
defined in completion metadata.
|
||
|
||
+++
|
||
*** 'completion-extra-properties' supports more metadata.
|
||
The new supported completion properties are 'category',
|
||
'group-function', 'display-sort-function', and 'cycle-sort-function'.
|
||
|
||
** Pcomplete
|
||
|
||
---
|
||
*** New user option 'pcomplete-remote-file-ignore'.
|
||
When this option is non-nil, remote file names are not completed by
|
||
Pcomplete. Packages, like 'shell-mode', could set this in order to
|
||
suppress remote file name completion at all.
|
||
|
||
---
|
||
*** Completion for the 'doas' command has been added.
|
||
Command completion for 'doas' in Eshell and Shell mode will now work.
|
||
|
||
** Shell mode
|
||
|
||
+++
|
||
*** New user option 'shell-get-old-input-include-continuation-lines'.
|
||
When this user option is non-nil, 'shell-get-old-input' ('C-RET')
|
||
includes multiple shell "\" continuation lines from command output.
|
||
Default is nil.
|
||
|
||
** Make mode
|
||
|
||
*** The Makefile browser is now obsolete.
|
||
The command 'makefile-switch-to-browser' command is now obsolete,
|
||
together with related commands used in the "*Macros and Targets*"
|
||
buffer. We recommend using an alternative like 'imenu' instead.
|
||
|
||
** Prog mode
|
||
|
||
+++
|
||
*** New command 'prog-fill-reindent-defun'.
|
||
This command either fills a single paragraph in a defun, such as a
|
||
docstring, or a comment, or (re)indents the surrounding defun if
|
||
point is not in a comment or a string. It is by default bound to
|
||
'M-q' in 'prog-mode' and all its descendants.
|
||
|
||
** Imenu
|
||
|
||
+++
|
||
*** New user option 'imenu-flatten'.
|
||
It defines whether to flatten the list of sections in an imenu
|
||
or show it nested.
|
||
|
||
+++
|
||
*** The sort order of Imenu completions can now be customized.
|
||
You can customize the option 'completion-category-overrides'
|
||
and set 'display-sort-function' for the category 'imenu'.
|
||
|
||
** Which Function mode
|
||
|
||
+++
|
||
*** Which Function mode can now display function names on the header line.
|
||
The new user option 'which-func-display' allows choosing where the
|
||
function name is displayed. The default is 'mode' to display in the
|
||
mode line. 'header' will display in the header line;
|
||
'mode-and-header' displays in both the header line and mode line.
|
||
|
||
** Tramp
|
||
|
||
+++
|
||
*** Tramp methods can be optional.
|
||
An optional connection method is not enabled by default. The user must
|
||
enable it explicitly by the 'tramp-enable-method' command. The existing
|
||
methods "fcp", "krlogin", " ksu" and "nc" are optional now.
|
||
|
||
+++
|
||
*** New optional connection method "androidsu".
|
||
This provides access to system files with elevated privileges granted by
|
||
the idiosyncratic 'su' implementations and system utilities customary on
|
||
Android.
|
||
|
||
+++
|
||
*** New optional connection method "run0".
|
||
This connection method is similar to "sudo", but it uses the
|
||
'systemd-run' program internally.
|
||
|
||
+++
|
||
*** New connection methods "dockercp" and "podmancp".
|
||
These are the external methods counterparts of "docker" and "podman".
|
||
|
||
+++
|
||
*** New optional connection methods for containers.
|
||
Tere are new optional connection methods "toolbox", "flatpak",
|
||
"apptainer" and "nspawn". They allow accessing system containers
|
||
provided by Toolbox, sandboxes provided by Flatpak, instances managed by
|
||
Apptainer, or accessing systemd-based light-weight containers..
|
||
|
||
+++
|
||
*** Connection method "kubernetes" supports now optional container name.
|
||
The host name for Kubernetes connections can be of kind [CONTAINER.]POD,
|
||
in order to specify a dedicated container. If there is just the pod
|
||
name, the first container in the pod is taken. The new user options
|
||
'tramp-kubernetes-context' and 'tramp-kubernetes-namespace' allow
|
||
accessing pods with different context or namespace but the default one.
|
||
|
||
+++
|
||
*** Rename 'tramp-use-ssh-controlmaster-options' to 'tramp-use-connection-share'.
|
||
The old name still exists as obsolete variable alias. This user
|
||
option controls now connection sharing for both ssh-based and
|
||
plink-based methods. It allows the values t, nil, and 'suppress'.
|
||
The latter suppresses also "ControlMaster" settings in the user's
|
||
"~/.ssh/config" file, or connection share configuration in PuTTY
|
||
sessions, respectively.
|
||
|
||
+++
|
||
*** New command 'tramp-cleanup-some-buffers'.
|
||
It kills only a subset of opened remote buffers, subject to the user
|
||
option 'tramp-cleanup-some-buffers-hook'.
|
||
|
||
+++
|
||
*** New command 'inhibit-remote-files'.
|
||
This command disables the handling of file names with the special
|
||
remote file name syntax. It should be applied only when remote files
|
||
won't be used in this Emacs instance. It provides a slightly improved
|
||
performance of file name handling in Emacs.
|
||
|
||
+++
|
||
*** New macro 'without-remote-files'.
|
||
This macro could wrap code which handles local files only. Due to the
|
||
temporary deactivation of remote files, it results in a slightly
|
||
improved performance of file name handling in Emacs.
|
||
|
||
+++
|
||
*** New user option 'tramp-completion-multi-hop-methods'.
|
||
It contains a list of connection methods for which completion should
|
||
be attempted at the end of a multi-hop chain. This allows completion
|
||
candidates to include a list of, for example, containers running on a
|
||
remote docker host.
|
||
|
||
+++
|
||
*** New command 'tramp-revert-buffer-with-sudo'.
|
||
It reverts the current buffer to visit with "sudo" permissions. The
|
||
buffer must either visit a file, or it must run 'dired-mode'. Another
|
||
method but "sudo" can be configured with user option
|
||
'tramp-file-name-with-method'.
|
||
|
||
---
|
||
*** Direct asynchronous processes use 'tramp-remote-path'.
|
||
When a direct asynchronous process is invoked, it uses 'tramp-remote-path'
|
||
for setting the remote PATH environment variable.
|
||
|
||
** File Notifications
|
||
|
||
+++
|
||
*** All backends except w32notify detect unmounting of a watched filesystem now.
|
||
|
||
** EWW
|
||
|
||
---
|
||
*** New mouse bindings in EWW buffers.
|
||
Certain form elements that were displayed as buttons, yet could only be
|
||
activated by keyboard input, are now operable using 'mouse-2'. With
|
||
"Submit" buttons, this triggers submission of the form, while clicks on
|
||
other classes of buttons either toggle their values or prompt for user
|
||
input, as the case may be.
|
||
|
||
---
|
||
*** EWW text input fields and areas are now fields.
|
||
In consequence, movement commands and OS input method features now
|
||
recognize and confine their activities to the text input field around
|
||
point. See also the Info node "(elisp) Fields".
|
||
|
||
+++
|
||
*** 'eww-open-file' can now display the file in a new buffer.
|
||
By default, the command reuses the "*eww*" buffer, but if called with
|
||
the new argument NEW-BUFFER non-nil, it will use a new buffer instead.
|
||
Interactively, invoke 'eww-open-file' with a prefix argument to
|
||
activate this behavior.
|
||
|
||
---
|
||
*** 'eww' URL or keyword prompt now has tab completion.
|
||
The interactive minibuffer prompt when invoking 'eww' now has support
|
||
for tab completion.
|
||
|
||
+++
|
||
*** 'eww' URL and keyword prompt now completes suggested URIs and bookmarks.
|
||
The interactive minibuffer prompt when invoking 'eww' now provides
|
||
completions from 'eww-suggest-uris'. 'eww-suggest-uris' now includes
|
||
bookmark URIs.
|
||
|
||
+++
|
||
*** New command 'eww-copy-alternate-url'.
|
||
It copies an alternate link on the page currently visited in EWW into
|
||
the kill ring. Alternate links are optional metadata that HTML pages
|
||
use for linking to their alternative representations, such as
|
||
translated versions or associated RSS feeds.
|
||
|
||
+++
|
||
*** 'eww-open-in-new-buffer' supports the prefix argument.
|
||
When invoked with the prefix argument ('C-u'),
|
||
'eww-open-in-new-buffer' will not make the new buffer the current one.
|
||
This is useful for continuing reading the URL in the current buffer
|
||
when the new URL is fetched.
|
||
|
||
---
|
||
*** History navigation in EWW now behaves as in other browsers.
|
||
Previously, when navigating back and forward through page history, EWW
|
||
would add a duplicate entry to the end of the history list each time.
|
||
This made it impossible to navigate to the "end" of the history list.
|
||
Now, navigating through history in EWW simply changes your position in
|
||
the history list, allowing you to reach the end as expected. In
|
||
addition, when browsing to a new page from a "historical" one (i.e., a
|
||
page loaded by navigating back through history), EWW deletes the history
|
||
entries newer than the current page. To change the behavior when
|
||
browsing from "historical" pages, you can customize
|
||
'eww-before-browse-history-function'.
|
||
|
||
+++
|
||
*** 'eww-readable' now toggles display of the readable parts of a web page.
|
||
When called interactively, 'eww-readable' toggles whether to display
|
||
only the readable parts of a page or the full page. With a positive
|
||
prefix argument, it always displays the readable parts, and with a zero
|
||
or negative prefix, it always displays the full page.
|
||
|
||
+++
|
||
*** New option 'eww-readable-urls'.
|
||
This is a list of regular expressions matching the URLs where EWW should
|
||
display only the readable parts by default. For more details, see
|
||
"(eww) Basics" in the EWW manual.
|
||
|
||
---
|
||
*** New option 'eww-readable-adds-to-history'.
|
||
When non-nil (the default), calling 'eww-readable' adds a new entry to
|
||
the EWW page history.
|
||
|
||
** Go-ts mode
|
||
|
||
+++
|
||
*** New command 'go-ts-mode-docstring'.
|
||
This command adds a docstring comment to the current defun. If a
|
||
comment already exists, point is only moved to the comment. It is
|
||
bound to 'C-c C-d' in 'go-ts-mode'.
|
||
|
||
** Man mode
|
||
|
||
+++
|
||
*** New user option 'Man-prefer-synchronous-call'.
|
||
When this is non-nil, run the 'man' command synchronously rather than
|
||
asynchronously (which is the default behavior).
|
||
|
||
+++
|
||
*** New user option 'Man-support-remote-systems'.
|
||
This option controls whether the man page is formatted on the remote
|
||
system when the current buffer's default-directory is remote. You can
|
||
invoke the 'man' command with a prefix argument to countermand the
|
||
value of this option for the current invocation of 'man'.
|
||
|
||
** DocView
|
||
|
||
---
|
||
*** New face 'doc-view-svg-face'.
|
||
This replaces 'doc-view-svg-foreground' and 'doc-view-svg-background'.
|
||
If you don't like the colors produced by the default definition of
|
||
this new face when DocView displays documents, customize this face to
|
||
restore the colors you were used to, or to get colors more to your
|
||
liking.
|
||
|
||
---
|
||
*** DocView buffers now display a new tool bar.
|
||
This tool bar contains options for searching and navigating within the
|
||
document, replacing the incompatible items for incremental search and
|
||
editing within the default tool bar displayed in the past.
|
||
|
||
** Shortdoc
|
||
|
||
+++
|
||
*** New function 'shortdoc-function-examples'.
|
||
This function returns examples of use of a given Emacs Lisp function
|
||
from the available shortdoc information.
|
||
|
||
+++
|
||
*** New function 'shortdoc-help-fns-examples-function'.
|
||
This function inserts into the current buffer examples of use of a
|
||
given Emacs Lisp function, which it gleans from the shortdoc
|
||
information. If you want 'describe-function' ('C-h f') to insert
|
||
examples of using the function into regular "*Help*" buffers, add the
|
||
following to your init file:
|
||
|
||
(add-hook 'help-fns-describe-function-functions
|
||
#'shortdoc-help-fns-examples-function)
|
||
|
||
** Package
|
||
|
||
---
|
||
*** New user option 'package-vc-register-as-project'.
|
||
When non-nil, it will automatically register every package as a
|
||
project, that you can quickly select using 'project-switch-project'
|
||
('C-x p p').
|
||
|
||
---
|
||
*** New user option 'package-vc-allow-build-commands'.
|
||
Controls for which packages Emacs runs extra build commands when
|
||
installing directly from the package VCS repository.
|
||
|
||
---
|
||
*** New command to start an inferior Emacs loading only specific packages.
|
||
The new command 'package-isolate' will start a new Emacs process, as
|
||
a sub-process of Emacs where you invoke the command, in a way that
|
||
causes the new process to load only some of the installed packages.
|
||
The command prompts for the packages to activate in this
|
||
sub-process, and is intended for testing Emacs and/or the packages
|
||
in a clean environment.
|
||
|
||
** Flymake
|
||
|
||
+++
|
||
*** New user option 'flymake-indicator-type'.
|
||
This user option controls which error indicator type Flymake should use
|
||
in current buffer. Depending on your preference, this can either use
|
||
fringes or margins for indicating errors.
|
||
|
||
+++
|
||
*** New user option 'flymake-margin-indicators-string'.
|
||
It controls, for each error type, the string and its face to display as
|
||
the margin indicator.
|
||
|
||
+++
|
||
*** New user option 'flymake-autoresize-margins'.
|
||
If non-nil, Flymake will resize the margins when 'flymake-mode' is
|
||
turned on or off.
|
||
Only relevant if 'flymake-indicator-type' is set to 'margins'.
|
||
|
||
+++
|
||
*** New user option 'flymake-margin-indicator-position'.
|
||
It controls which margin (left or right) is used for margin
|
||
indicators.
|
||
|
||
+++
|
||
*** New user option 'flymake-show-diagnostics-at-end-of-line'.
|
||
When non-nil, Flymake shows summarized descriptions of diagnostics at
|
||
the end of the line. Depending on your preference, this can either be
|
||
distracting and easily confused with actual code, or a significant
|
||
early aid that relieves you from moving the buffer or reaching for the
|
||
mouse to consult an error message.
|
||
|
||
** Flyspell
|
||
|
||
*** New user option 'flyspell-check-changes'.
|
||
When non-nil, Flyspell mode spell-checks only words that you edited; it
|
||
does not check unedited words just because you move point across them.
|
||
|
||
** JS mode.
|
||
The binding 'M-.' has been removed from the major mode keymaps in
|
||
'js-mode' and 'js-ts-mode', having it default to the global binding
|
||
which calls 'xref-find-definitions'. If the previous one worked
|
||
better for you, use 'define-key' in your init script to bind
|
||
'js-find-symbol' to that combination again.
|
||
|
||
** Json mode.
|
||
'js-json-mode' does not derive from 'js-mode' any more so as not
|
||
to confuse tools like Eglot or YASnippet into thinking that those
|
||
buffers contain Javascript code.
|
||
|
||
** Python mode
|
||
|
||
---
|
||
*** New user option 'python-indent-block-paren-deeper'.
|
||
If non-nil, increase the indentation of the lines inside parens in a
|
||
header of a block when they are indented to the same level as the body
|
||
of the block:
|
||
|
||
if (some_expression
|
||
and another_expression):
|
||
do_something()
|
||
|
||
instead of:
|
||
|
||
if (some_expression
|
||
and another_expression):
|
||
do_something()
|
||
|
||
*** New user option 'python-interpreter-args'.
|
||
This allows the user to specify command line arguments to the non
|
||
interactive Python interpreter specified by 'python-interpreter'.
|
||
|
||
*** New function 'python-shell-send-block'.
|
||
It sends the python block delimited by 'python-nav-beginning-of-block'
|
||
and 'python-nav-end-of-block' to the inferior Python process.
|
||
|
||
** Inferior Python mode
|
||
|
||
---
|
||
*** Default value of 'python-shell-compilation-regexp-alist' is changed.
|
||
Support for Python's ExceptionGroup has been added, so in the Python
|
||
shell, the line indicating the source of error in the error messages
|
||
from ExceptionGroup will be recognized as well.
|
||
|
||
** Scheme mode
|
||
Scheme mode now handles regular expression literal '#/regexp/' that is
|
||
available in some Scheme implementations.
|
||
Also, it should now handle nested sexp-comments.
|
||
|
||
** Use package
|
||
|
||
+++
|
||
*** New ':vc' keyword.
|
||
This keyword enables the user to install packages using 'package-vc'.
|
||
|
||
+++
|
||
*** New user option 'use-package-vc-prefer-newest'.
|
||
This allows the user to always install the newest commit of a package
|
||
when using the ':vc' keyword.
|
||
|
||
** Gnus
|
||
|
||
+++
|
||
*** New backend 'nnfeed'.
|
||
This allows backend developers to easily create new backends for web
|
||
feeds, as inheriting backends of 'nnfeed'.
|
||
|
||
+++
|
||
*** New backend 'nnatom'.
|
||
This allow users to add Atom Syndication Format feeds to Gnus as
|
||
servers.
|
||
|
||
*** The 'nnweb-type' option 'gmane' has been removed.
|
||
The gmane.org website is, sadly, down since a number of years with no
|
||
prospect of it coming back. Therefore, it is no longer valid to set
|
||
the user option 'nnweb-type' to 'gmane'.
|
||
|
||
---
|
||
*** New user option 'gnus-mode-line-logo'.
|
||
This allows the user to either disable the display of any logo or
|
||
specify which logo will be displayed as part of the
|
||
buffer-identification in the mode-line of Gnus buffers.
|
||
|
||
** Rmail
|
||
|
||
---
|
||
*** New commands for reading mailing lists.
|
||
The new Rmail commands 'rmail-mailing-list-post',
|
||
'rmail-mailing-list-unsubscribe', 'rmail-mailing-list-help', and
|
||
'rmail-mailing-list-archive' allow, respectively, posting to,
|
||
unsubscribing from, requesting help about, and browsing the archives
|
||
of, the mailing list from which the current email message was
|
||
delivered.
|
||
|
||
** Dictionary
|
||
|
||
---
|
||
*** New user option 'dictionary-search-interface'.
|
||
Controls how the 'dictionary-search' command prompts for and displays
|
||
dictionary definitions. Customize this user option to 'help' to have
|
||
'dictionary-search' display definitions in a "*Help*" buffer and
|
||
provide dictionary-based minibuffer completion for word selection.
|
||
|
||
---
|
||
*** New user option 'dictionary-read-word-prompt'.
|
||
This allows the user to customize the prompt that is used by
|
||
'dictionary-search' when asking for a word to search in the
|
||
dictionary.
|
||
|
||
---
|
||
*** New user option 'dictionary-display-definition-function'.
|
||
This allows the user to customize the way in which 'dictionary-search'
|
||
displays word definitions. If non-nil, this user option should be set
|
||
to a function that displays a word definition obtained from a
|
||
dictionary server. The new function
|
||
'dictionary-display-definition-in-help-buffer' can be used to display
|
||
the definition in a "*Help*" buffer, instead of the default
|
||
"*Dictionary*" buffer.
|
||
|
||
---
|
||
*** New user option 'dictionary-read-word-function'.
|
||
This allows the user to customize the way in which 'dictionary-search'
|
||
prompts for a word to search in the dictionary. This user option
|
||
should be set to a function that lets the user select a word and
|
||
returns it as a string. The new function
|
||
'dictionary-completing-read-word' can be used to prompt with
|
||
completion based on dictionary matches.
|
||
|
||
---
|
||
*** New user option 'dictionary-read-dictionary-function'.
|
||
This allows the user to customize the way in which 'dictionary-search'
|
||
prompts for a dictionary to search in. This user option should be set
|
||
to a function that lets the user select a dictionary and returns its
|
||
name as a string. The new function
|
||
'dictionary-completing-read-dictionary' can be used to prompt with
|
||
completion based on dictionaries that the server supports.
|
||
|
||
---
|
||
*** The default value of 'dictionary-tooltip-dictionary' has changed.
|
||
The new default value is t, which means use the same dictionary as the
|
||
value of 'dictionary-default-dictionary'. The previous default value
|
||
was nil, which effectively disabled 'dictionary-tooltip-mode', even if
|
||
the mode was turned on.
|
||
|
||
** Pp
|
||
|
||
*** New 'pp-default-function' user option replaces 'pp-use-max-width'.
|
||
|
||
*** New default pretty printing function, which tries to obey 'fill-column'.
|
||
|
||
*** 'pp-to-string' takes an additional PP-FUNCTION argument.
|
||
This argument specifies the prettifying algorithm to use.
|
||
|
||
** Emacs Lisp mode
|
||
|
||
---
|
||
*** ',@' now has 'prefix' syntax.
|
||
Previously, the '@' character, which normally has 'symbol' syntax,
|
||
would combine with a following Lisp symbol and interfere with symbol
|
||
searching.
|
||
|
||
---
|
||
*** 'emacs-lisp-docstring-fill-column' now defaults to 72.
|
||
It was previously 65. The new default formats documentation strings to
|
||
fit on fewer lines without negatively impacting readability.
|
||
|
||
** CPerl mode
|
||
|
||
---
|
||
*** Subroutine signatures are now supported.
|
||
CPerl mode fontifies subroutine signatures like variable declarations
|
||
which makes them visually distinct from subroutine prototypes.
|
||
|
||
*** Syntax of Perl up to version 5.38 is supported.
|
||
CPerl mode supports the new keywords for exception handling and the
|
||
object oriented syntax which were added in Perl 5.36 and 5.38.
|
||
|
||
*** New user option 'cperl-fontify-trailer'.
|
||
This user option takes the values 'perl-code' or 'comment' and treats
|
||
text after an "__END__" or "__DATA__" token accordingly. The default
|
||
value of 'perl-code' is useful for trailing POD and for AutoSplit
|
||
modules, the value 'comment' makes CPerl mode treat trailers as
|
||
comment, like Perl mode does.
|
||
|
||
*** New command 'cperl-file-style'.
|
||
This command sets the indentation style for the current buffer. To
|
||
change the default style, either use the user option with the same name
|
||
or use the command 'cperl-set-style'.
|
||
|
||
*** Commands using the Perl info page are obsolete.
|
||
The Perl documentation in info format is no longer distributed with
|
||
Perl or on CPAN since more than 10 years. Perl documentation can be
|
||
read with 'cperl-perldoc' instead.
|
||
|
||
*** Highlighting trailing whitespace has been removed.
|
||
The user option 'cperl-invalid-face' is now obsolete, and does
|
||
nothing. See the user option 'show-trailing-whitespace' instead.
|
||
|
||
** Emacs Sessions (Desktop)
|
||
|
||
+++
|
||
*** Restoring buffers visiting remote files can now time out.
|
||
When a buffer is restored which visits a remote file, the restoration
|
||
of the session could hang if the remote host is off-line or slow to
|
||
respond. Setting the user option 'remote-file-name-access-timeout' to
|
||
a positive number will abandon the attempt to restore such buffers
|
||
after a timeout of that many seconds, thus allowing the rest of
|
||
desktop restoration to continue.
|
||
|
||
** Recentf
|
||
|
||
+++
|
||
*** Checking recent remote files can now time out.
|
||
Similarly to buffer restoration by Desktop, 'recentf-mode' checking
|
||
of the accessibility of remote files can now time out if
|
||
'remote-file-name-access-timeout' is set to a positive number.
|
||
|
||
** Notifications
|
||
|
||
+++
|
||
*** Allow using Icon Naming Specification for ':app-icon'.
|
||
You can use a symbol as the value for ':app-icon' to provide icon name
|
||
without specifying a file, like this:
|
||
|
||
(notifications-notify
|
||
:title "I am playing music" :app-icon 'multimedia-player)
|
||
|
||
** Image
|
||
|
||
+++
|
||
*** Image ':map' property is now recomputed when image is transformed.
|
||
Now images with clickable maps work as expected after you run commands
|
||
such as 'image-increase-size', 'image-decrease-size', 'image-rotate',
|
||
'image-flip-horizontally', and 'image-flip-vertically'.
|
||
|
||
+++
|
||
*** New user option 'image-recompute-map-p'.
|
||
Set this option to nil to prevent Emacs from recomputing image maps.
|
||
|
||
** Image Dired
|
||
|
||
*** New user option 'image-dired-thumb-naming'.
|
||
You can now configure how a thumbnail is named using this option.
|
||
|
||
** ERT
|
||
|
||
+++
|
||
*** New macro 'skip-when' to skip 'ert-deftest' tests.
|
||
This can help avoid some awkward skip conditions. For example
|
||
'(skip-unless (not noninteractive))' can be changed to the easier
|
||
to read '(skip-when noninteractive)'.
|
||
|
||
+++
|
||
*** Syntax highlighting unit testing support.
|
||
An ERT extension ('ert-font-lock') now provides support for face
|
||
assignment unit testing. For more information, see the "(ert) Syntax
|
||
Highlighting Tests" node in the ERT manual.
|
||
|
||
** URL
|
||
|
||
+++
|
||
*** 'url-gateway-broken-resolution' is now obsolete.
|
||
This option was intended for use on SunOS 4.x and Ultrix systems,
|
||
neither of which have been supported by Emacs since version 23.1.
|
||
The user option 'url-gateway-nslookup-program' and the function
|
||
'url-gateway-nslookup-host' are consequently also obsolete.
|
||
|
||
** Socks
|
||
|
||
+++
|
||
*** Socks supports version 4a.
|
||
The 'socks-server' user option accepts '4a' as a value for its version
|
||
field.
|
||
|
||
** Edmacro
|
||
|
||
+++
|
||
*** New command 'edmacro-set-macro-to-region-lines'.
|
||
Bound to 'C-c C-r', this command replaces the macro text with the
|
||
lines of the region. If needed, the region is extended to include
|
||
whole lines. If the region ends at the beginning of a line, that last
|
||
line is excluded.
|
||
|
||
+++
|
||
*** New user option 'edmacro-reverse-macro-lines'.
|
||
When this is non-nil, the lines of key sequences are displayed with
|
||
the most recent line first. This is can be useful when working with
|
||
macros with many lines, such as from 'kmacro-edit-lossage'.
|
||
|
||
** Proced
|
||
|
||
---
|
||
*** More control on automatic update of Proced buffers.
|
||
The user option 'proced-auto-update-flag' can now be set to 2 additional
|
||
values, which control automatic updates of Proced buffers that are not
|
||
displayed in some window.
|
||
|
||
** Kmacro Menu mode
|
||
|
||
+++
|
||
*** New mode 'kmacro-menu-mode' and new command 'list-keyboard-macros'.
|
||
The new command 'list-keyboard-macros' is the keyboard-macro version
|
||
of commands like 'list-buffers' and 'list-processes', creating a listing
|
||
of the currently existing keyboards macros using the new mode
|
||
'kmacro-menu-mode'. It allows rearranging the macros in the ring,
|
||
duplicating them, deleting them, and editing their counters, formats,
|
||
and keys.
|
||
|
||
** Customize
|
||
|
||
+++
|
||
*** New command 'customize-dirlocals'.
|
||
This command pops up a buffer to edit the settings in ".dir-locals.el".
|
||
|
||
---
|
||
** New command 'customize-toggle-option'.
|
||
This command can toggle boolean options for the duration of a session.
|
||
|
||
** Calc
|
||
|
||
+++
|
||
*** Calc parses fractions written using U+2044 FRACTION SLASH.
|
||
Fractions of the form "123⁄456" are handled as if written "123:456".
|
||
Note in particular the difference in behavior from U+2215 DIVISION SLASH
|
||
and U+002F SOLIDUS, which result in division rather than a rational
|
||
fraction. You may also be interested to know that precomposed fraction
|
||
characters, such as ½ (U+00BD VULGAR FRACTION ONE HALF), are also
|
||
recognized as rational fractions. They have been since 2004, but it
|
||
looks like it was never mentioned in the NEWS, or even the manual.
|
||
|
||
** IELM
|
||
|
||
---
|
||
*** IELM now remembers input history between sessions.
|
||
The new user option 'ielm-history-file-name' is the name of the file
|
||
where IELM input history will be saved. Customize it to nil to revert
|
||
to the old behavior of not remembering input history between sessions.
|
||
|
||
** EasyPG
|
||
|
||
+++
|
||
*** New user option 'epa-keys-select-method'.
|
||
This allows the user to customize the key selection method, which can be
|
||
either by using a pop-up buffer or from the minibuffer. The pop-up
|
||
buffer method is the default, which preserves previous behavior.
|
||
|
||
** Xwidget Webkit
|
||
|
||
+++
|
||
*** New user option 'xwidget-webkit-disable-javascript'.
|
||
This allows disabling JavaScript in xwidget Webkit sessions.
|
||
|
||
** Ls Lisp
|
||
|
||
---
|
||
*** 'ls-lisp--insert-directory' supports more long options of 'ls'.
|
||
'ls-lisp--insert-directory', the ls-lisp implementation of
|
||
'insert-directory', now supports the '--time=TIME' and '--sort=time'
|
||
options of GNU 'ls'.
|
||
|
||
** Widget
|
||
|
||
+++
|
||
*** New user option 'widget-skip-inactive'.
|
||
If non-nil, moving point forward or backward between widgets by typing
|
||
'TAB' or 'S-TAB' skips over inactive widgets. The default value is nil.
|
||
|
||
** Ruby mode
|
||
New user option 'ruby-rubocop-use-bundler'. By default it retains the
|
||
previous behavior: read the contens of Gemfile and act accordingly. But
|
||
you can also set it to t or nil to skip the check.
|
||
|
||
** Miscellaneous
|
||
|
||
---
|
||
*** Webjump now assumes URIs are HTTPS instead of HTTP.
|
||
For links in 'webjump-sites' without an explicit URI scheme, it was
|
||
previously assumed that they should be prefixed with "http://". Such
|
||
URIs are now prefixed with "https://" instead.
|
||
|
||
---
|
||
*** 'bug-reference-mode' now supports 'thing-at-point'.
|
||
Now, calling '(thing-at-point 'url)' when point is on a bug reference
|
||
will return the URL for that bug.
|
||
|
||
+++
|
||
*** New user option 'rcirc-log-time-format'.
|
||
This allows for rcirc logs to use a custom timestamp format, than the
|
||
chat buffers use by default.
|
||
|
||
---
|
||
*** New user option 'Buffer-menu-group-by'.
|
||
It controls how buffers are divided into groups that are displayed with
|
||
headings using Outline minor mode.
|
||
|
||
+++
|
||
*** New command 'Buffer-menu-toggle-internal'.
|
||
This command toggles the display of internal buffers in Buffer Menu mode;
|
||
that is, buffers not visiting a file and whose names start with a space.
|
||
Previously, such buffers were never shown. This command is bound to 'I'
|
||
in Buffer Menu mode.
|
||
|
||
|
||
* New Modes and Packages in Emacs 30.1
|
||
|
||
+++
|
||
** New package Track-Changes.
|
||
This library is a layer of abstraction above 'before-change-functions'
|
||
and 'after-change-functions' which provides a superset of
|
||
the functionality of 'after-change-functions':
|
||
- It provides the actual previous text rather than only its length.
|
||
- It takes care of accumulating and bundling changes until a time when
|
||
its client finds it convenient to react to them.
|
||
- It detects most cases where some changes were not properly
|
||
reported (calls to 'before/after-change-functions' that are
|
||
incorrectly paired, missing, etc...) and reports them adequately.
|
||
|
||
** New major modes based on the tree-sitter library
|
||
|
||
+++
|
||
*** New major mode 'html-ts-mode'.
|
||
An optional major mode based on the tree-sitter library for editing
|
||
HTML files.
|
||
|
||
---
|
||
*** New major mode 'heex-ts-mode'.
|
||
A major mode based on the tree-sitter library for editing HEEx files.
|
||
|
||
---
|
||
*** New major mode 'elixir-ts-mode'.
|
||
A major mode based on the tree-sitter library for editing Elixir files.
|
||
|
||
---
|
||
*** New major mode 'lua-ts-mode'.
|
||
A major mode based on the tree-sitter library for editing Lua files.
|
||
|
||
** Minibuffer and Completions
|
||
|
||
+++
|
||
*** New global minor mode 'minibuffer-regexp-mode'.
|
||
This is a minor mode for editing regular expressions in the minibuffer.
|
||
It highlights parens via ‘show-paren-mode’ and ‘blink-matching-paren’ in
|
||
a user-friendly way, avoids reporting alleged paren mismatches and makes
|
||
sexp navigation more intuitive.
|
||
|
||
+++
|
||
*** New minor mode 'completion-preview-mode'.
|
||
This minor mode shows you symbol completion suggestions as you type,
|
||
using an inline preview. New user options in the 'completion-preview'
|
||
customization group control exactly when Emacs displays this preview.
|
||
'completion-preview-mode' is buffer-local, to enable it globally use
|
||
'global-completion-preview-mode'.
|
||
|
||
---
|
||
** The highly accessible Modus themes collection has eight items.
|
||
The 'modus-operandi' and 'modus-vivendi' are the main themes that have
|
||
been part of Emacs since version 28. The former is light, the latter
|
||
dark. In addition to these, we now have 'modus-operandi-tinted' and
|
||
'modus-vivendi-tinted' for easier legibility, as well as
|
||
'modus-operandi-deuteranopia', 'modus-vivendi-deuteranopia',
|
||
'modus-operandi-tritanopia', and 'modus-vivendi-tritanopia' to cover
|
||
the needs of users with red-green or blue-yellow color deficiency.
|
||
The Info manual "(modus-themes) Top" describes the details and
|
||
showcases all their customization options.
|
||
|
||
+++
|
||
** New global minor mode 'etags-regen-mode'.
|
||
This minor mode generates the tags table automatically based on the
|
||
current project configuration, and later updates it as you edit the
|
||
files and save the changes.
|
||
|
||
+++
|
||
** New package Compat.
|
||
Emacs now comes with a stub implementation of the
|
||
forwards-compatibility Compat package from GNU ELPA. This allows
|
||
built-in packages to use the library more effectively, and helps
|
||
preventing the installation of Compat if unnecessary.
|
||
|
||
+++
|
||
** New package PEG.
|
||
Emacs now includes a library for writing Parsing Expression
|
||
Grammars (PEG), an approach to text parsing that provides more structure
|
||
than regular expressions, but less complexity than context-free
|
||
grammars. The Info manual "(elisp) Parsing Expression Grammars" has
|
||
documentation and examples.
|
||
|
||
|
||
* Incompatible Lisp Changes in Emacs 30.1
|
||
|
||
+++
|
||
** Evaluating a 'lambda' returns an object of type 'interpreted-function'.
|
||
Instead of representing interpreted functions as lists that start with
|
||
either 'lambda' or 'closure', Emacs now represents them as objects
|
||
of their own 'interpreted-function' type, which is very similar
|
||
to 'byte-code-function' objects (the argument list, docstring, and
|
||
interactive forms are placed in the same slots).
|
||
Lists that start with 'lambda' are now used only for non-evaluated
|
||
functions (in other words, for source code), but for backward compatibility
|
||
reasons, 'functionp' still recognizes them as functions and you can
|
||
still call them as before.
|
||
Thus code that attempts to "dig" into the internal structure of an
|
||
interpreted function's object with the likes of 'car' or 'cdr' will
|
||
no longer work and will need to use 'aref' instead to extract its
|
||
various subparts (when 'interactive-form', 'documentation', and
|
||
'help-function-arglist' aren't adequate).
|
||
|
||
+++
|
||
** 'define-globalized-minor-mode' requires that modes use 'run-mode-hooks'.
|
||
Minor modes defined with 'define-globalized-minor-mode', such as
|
||
'global-font-lock-mode', will not be enabled any more in those buffers
|
||
whose major modes fail to use 'run-mode-hooks'. Major modes defined
|
||
with 'define-derived-mode' are not affected. 'run-mode-hooks' has been the
|
||
recommended way to run major mode hooks since Emacs 22.
|
||
|
||
---
|
||
** Old derived.el functions removed.
|
||
The following functions have been deleted because they were only used
|
||
by code compiled with Emacs<21:
|
||
'derived-mode-init-mode-variables', 'derived-mode-merge-abbrev-tables',
|
||
'derived-mode-merge-keymaps', 'derived-mode-merge-syntax-tables',
|
||
'derived-mode-run-hooks', 'derived-mode-set-abbrev-table',
|
||
'derived-mode-set-keymap', 'derived-mode-set-syntax-table',
|
||
'derived-mode-setup-function-name'.
|
||
|
||
+++
|
||
** 'M-TAB' now invokes 'completion-at-point' also in Text mode.
|
||
By default, Text mode no longer binds 'M-TAB' to
|
||
'ispell-complete-word'. Instead, this mode arranges for
|
||
'completion-at-point', globally bound to 'M-TAB', to perform word
|
||
completion as well. You can have Text mode bind 'M-TAB' to
|
||
'ispell-complete-word' as it did in previous Emacs versions, or
|
||
disable Ispell word completion in Text mode altogether, by customizing
|
||
the new user option 'text-mode-ispell-word-completion'.
|
||
|
||
** 'pp' and 'pp-to-string' now always include a terminating newline.
|
||
In the past they included a terminating newline in most cases but not all.
|
||
|
||
** 'buffer-match-p' and 'match-buffers' take '&rest args'.
|
||
They used to take a single '&optional arg' and were documented to use
|
||
an unreliable hack to try and support condition predicates that
|
||
don't accept this optional arg.
|
||
The new semantics makes no such accommodation, but the code still
|
||
supports it (with a warning) for backward compatibility.
|
||
|
||
** 'post-gc-hook' runs after updating 'gcs-done' and 'gcs-elapsed'.
|
||
|
||
---
|
||
** The escape sequence '\x' not followed by hex digits is now an error.
|
||
Previously, '\x' without at least one hex digit denoted character code
|
||
zero (NUL) but as this was neither intended nor documented or even
|
||
known by anyone, it is now treated as an error by the Lisp reader.
|
||
|
||
---
|
||
** Connection-local variables are applied in buffers visiting a remote file.
|
||
This overrides possible directory-local or file-local variables with
|
||
the same name.
|
||
|
||
---
|
||
** User option 'tramp-completion-reread-directory-timeout' has been removed.
|
||
This user option has been obsoleted in Emacs 27, use
|
||
'remote-file-name-inhibit-cache' instead.
|
||
|
||
---
|
||
** User options 'eshell-NAME-unload-hook' are now obsolete.
|
||
These hooks were named incorrectly, and so they never actually ran
|
||
when unloading the corresponding feature. Instead, you should use
|
||
hooks named after the feature name, like 'esh-mode-unload-hook'.
|
||
|
||
+++
|
||
** 'copy-tree' now copies records when its optional 2nd argument is non-nil.
|
||
|
||
+++
|
||
** Regexp zero-width assertions followed by operators are better defined.
|
||
Previously, regexps such as "xy\\B*" would have ill-defined behavior.
|
||
Now any operator following a zero-width assertion applies to that
|
||
assertion only (which is useless). For historical compatibility, an
|
||
operator character following '^' or '\`' becomes literal, but we
|
||
advise against relying on this.
|
||
|
||
---
|
||
** Mode-line mnemonics for some coding-systems have changed.
|
||
The mode-line mnemonic for 'utf-7' is now the lowercase 'u', to be
|
||
consistent with the other encodings of this family.
|
||
|
||
The mode-line mnemonic for 'koi8-u' is now 'У', U+0423 CYRILLIC
|
||
CAPITAL LETTER U, to distinguish between this encoding and the
|
||
UTF-8/UTF-16 family.
|
||
|
||
If your terminal cannot display 'У', or if you want to get the old
|
||
behavior back for any other reason, you can do that using the
|
||
'coding-system-put' function. For example, the following restores the
|
||
previous behavior of showing 'U' in the mode line for 'koi8-u':
|
||
|
||
(coding-system-put 'koi8-u :mnemonic ?U)
|
||
|
||
---
|
||
** 'vietnamese-tcvn' is now a coding system alias for 'vietnamese-vscii'.
|
||
VSCII-1 and TCVN-5712 are different names for the same character
|
||
encoding. Therefore, the duplicate coding system definition has been
|
||
dropped in favor of an alias.
|
||
|
||
The mode-line mnemonic for 'vietnamese-vscii' and its aliases is the
|
||
lowercase letter 'v'.
|
||
|
||
+++
|
||
** Infinities and NaNs no longer act as symbols on non-IEEE platforms.
|
||
On old platforms like the VAX that do not support IEEE floating-point,
|
||
tokens like 0.0e+NaN and 1.0e+INF are no longer read as symbols.
|
||
Instead, the Lisp reader approximates an infinity with the nearest
|
||
finite value, and a NaN with some other non-numeric object that
|
||
provokes an error if used numerically.
|
||
|
||
+++
|
||
** X color support compatibility aliases are now marked obsolete.
|
||
The compatibility aliases 'x-defined-colors', 'x-color-defined-p',
|
||
'x-color-values', and 'x-display-color-p' are now obsolete.
|
||
|
||
+++
|
||
** 'easy-mmode-define-{minor,global}-mode' aliases are now obsolete.
|
||
Use 'define-minor-mode' and 'define-globalized-minor-mode' instead.
|
||
|
||
** The obsolete calling convention of 'sit-for' has been removed.
|
||
That convention was: '(sit-for SECONDS MILLISEC &optional NODISP)'.
|
||
|
||
** The 'millisec' argument of 'sleep-for' has been declared obsolete.
|
||
Use a float value for the first argument instead.
|
||
|
||
** 'eshell-process-wait-{seconds,milliseconds}' options are now obsolete.
|
||
Instead, use 'eshell-process-wait-time', which supports floating-point
|
||
values.
|
||
|
||
+++
|
||
** Conversion of strings to and from byte-arrays works with multibyte strings.
|
||
The functions 'dbus-string-to-byte-array' and
|
||
'dbus-byte-array-to-string' now accept and return multibyte Lisp
|
||
strings, encoding to UTF-8 and decoding from UTF-8 internally. This
|
||
means that the argument to 'dbus-byte-array-to-string' must be a valid
|
||
UTF-8 byte sequence, and the optional parameter MULTIBYTE of
|
||
'dbus-byte-array-to-string' is now obsolete and unused. The argument of
|
||
'dbus-string-to-byte-array' should be a regular Lisp string, not a
|
||
unibyte string.
|
||
|
||
|
||
* Lisp Changes in Emacs 30.1
|
||
+++
|
||
** New user option 'compilation-safety' to control safety of native code.
|
||
It's now possible to control how safe is the code generated by native
|
||
compilation, by customizing this user option. It is also possible to
|
||
control this at function granularity by using the new 'safety' parameter
|
||
in the function's 'declare' form.
|
||
|
||
** New types 'closure' and 'interpreted-function'.
|
||
'interpreted-function' is the new type used for interpreted functions,
|
||
and 'closure' is the common parent type of 'interpreted-function'
|
||
and 'byte-code-function'.
|
||
|
||
Those new types come with the associated new predicates 'closurep' and
|
||
`interpreted-function-p' as well as a new constructor
|
||
'make-interpreted-closure'.
|
||
|
||
** New function 'help-fns-function-name'.
|
||
For named functions, it just returns the name and otherwise
|
||
it returns a short "unique" string that identifies the function.
|
||
In either case, the string is propertized so clicking on it gives
|
||
further details.
|
||
|
||
** New function 'cl-type-of'.
|
||
This function is like 'type-of' except that it sometimes returns
|
||
a more precise type. For example, for nil and t it returns 'null'
|
||
and 'boolean' respectively, instead of just 'symbol'.
|
||
|
||
** New functions 'primitive-function-p' and 'cl-functionp'.
|
||
'primitive-function-p' is like 'subr-primitive-p' except that it returns
|
||
t only if the argument is a function rather than a special-form,
|
||
and 'cl-functionp' is like 'functionp' except it returns nil
|
||
for lists and symbols.
|
||
|
||
** Built-in types have now corresponding classes.
|
||
At the Lisp level, this means that things like '(cl-find-class 'integer)'
|
||
will now return a class object, and at the UI level it means that
|
||
things like 'C-h o integer RET' will show some information about that type.
|
||
|
||
** New variable 'major-mode-remap-defaults' and function 'major-mode-remap'.
|
||
The first is like Emacs-29's 'major-mode-remap-alist' but to be set by
|
||
packages (instead of users). The second looks up those two variables.
|
||
|
||
+++
|
||
** Pcase's functions (in 'pred' and 'app') can specify the argument position.
|
||
For example, instead of '(pred (< 5))' you can write '(pred (> _ 5))'.
|
||
|
||
+++
|
||
** 'define-advice' now sets the new advice's 'name' property to NAME.
|
||
Named advices defined with 'define-advice' can now be removed with
|
||
'(advice-remove SYMBOL NAME)' in addition to '(advice-remove SYMBOL
|
||
SYMBOL@NAME)'.
|
||
|
||
+++
|
||
** New function 'require-with-check' to detect new versions shadowing.
|
||
This is like 'require', but it checks whether the argument 'feature'
|
||
is already loaded, in which case it either signals an error or
|
||
forcibly reloads the file that defines the feature.
|
||
|
||
+++
|
||
** New variable 'lisp-eval-depth-reserve'.
|
||
It puts a limit to the amount by which Emacs can temporarily increase
|
||
'max-lisp-eval-depth' when handling signals.
|
||
|
||
+++
|
||
** New special form 'handler-bind'.
|
||
It provides a functionality similar to 'condition-case' except it runs
|
||
the handler code without unwinding the stack, such that we can record
|
||
the backtrace and other dynamic state at the point of the error. See
|
||
the Info node "(elisp) Handling Errors".
|
||
|
||
+++
|
||
** Tooltips on fringes.
|
||
It is now possible to provide tooltips on fringes by adding special text
|
||
properties 'left-fringe-help' and 'right-fringe-help'. See the "(elisp)
|
||
Special Properties" Info node in the Emacs Lisp Reference Manual for
|
||
more details.
|
||
|
||
+++
|
||
** New 'pop-up-frames' action alist entry for 'display-buffer'.
|
||
This has the same effect as the variable of the same name and takes
|
||
precedence over the variable when present.
|
||
|
||
** New function 'merge-ordered-lists'.
|
||
Mostly used internally to do a kind of topological sort of
|
||
inheritance hierarchies.
|
||
|
||
+++
|
||
** 'drop' is now an alias for the function 'nthcdr'.
|
||
|
||
+++
|
||
** New polymorphic comparison function 'value<'.
|
||
This function returns non-nil if the first argument is less than the
|
||
second. It works for any two values of the same type with reasonable
|
||
ordering for numbers, strings, symbols, bool-vectors, markers, buffers
|
||
and processes. Conses, lists, vectors and records are ordered
|
||
lexicographically.
|
||
It is intended as a convenient ordering predicate for sorting, and is
|
||
likely to be faster than hand-written Lisp functions.
|
||
|
||
+++
|
||
** New 'sort' arguments and features.
|
||
The 'sort' function can now be called using the signature
|
||
|
||
(sort SEQ &rest KEYWORD-ARGUMENTS)
|
||
|
||
where arguments after the first are keyword/value pairs, all optional:
|
||
':key' specifies a function that produces the sorting key from an element,
|
||
':lessp' specifies the ordering predicate, defaulting to 'value<',
|
||
':reverse' is used to reverse the sorting order,
|
||
':in-place is used for in-place sorting, as the default is now to
|
||
sort a copy of the input.
|
||
|
||
The new signature is less error-prone and reduces the need to write
|
||
ordering predicates by hand. We recommend that you use the ':key'
|
||
argument instead of ':lessp' unless a suitable ordering predicate is
|
||
already available. This can also be used for multi-key sorting:
|
||
|
||
(sort seq :key (lambda (x) (list (age x) (size x) (cost x))))
|
||
|
||
sorts by the return value of 'age', then by 'size', then by 'cost'.
|
||
|
||
The old signature, '(sort SEQ PREDICATE)', can still be used and sorts
|
||
its input in-place as before.
|
||
|
||
** New API for 'derived-mode-p' and control of the graph of major modes.
|
||
|
||
*** 'derived-mode-p' now takes the list of modes as a single argument.
|
||
The same holds for 'provided-mode-derived-p'.
|
||
The old calling convention where multiple modes are passed as
|
||
separate arguments is deprecated.
|
||
|
||
*** New functions to access the graph of major modes.
|
||
While 'define-derived-mode' still only supports single inheritance,
|
||
modes can declare additional parents (for tests like 'derived-mode-p')
|
||
with 'derived-mode-add-parents'.
|
||
Accessing the 'derived-mode-parent' property directly is now
|
||
deprecated in favor of the new functions 'derived-mode-set-parent'
|
||
and 'derived-mode-all-parents'.
|
||
|
||
+++
|
||
** Drag-and-drop functions can now be called once for compound drops.
|
||
It is now possible for drag-and-drop handler functions to respond to
|
||
drops incorporating more than one URL. Functions capable of this must
|
||
set their 'dnd-multiple-handler' symbol properties to a non-nil value.
|
||
See the Info node "(elisp) Drag and Drop".
|
||
|
||
Incident to this change, the function 'dnd-handle-one-url' has been
|
||
made obsolete, for it cannot take these new handlers into account.
|
||
|
||
** New function 're-disassemble' to see the innards of a regexp.
|
||
If you compiled with '--enable-checking', you can use this to help debug
|
||
either your regexp performance problems or the regexp engine.
|
||
|
||
+++
|
||
** XLFDs are no longer restricted to 255 characters.
|
||
'font-xlfd-name' now returns an XLFD even if it is greater than 255
|
||
characters in length, provided that the LONG_XLFDs argument is true.
|
||
|
||
Other features in Emacs which employ XLFDs have been modified to
|
||
produce and understand XLFDs larger than 255 characters.
|
||
|
||
** 'defadvice' is marked as obsolete.
|
||
See the "(elisp) Porting Old Advice" Info node for help converting
|
||
them to use 'advice-add' or 'define-advice' instead.
|
||
|
||
** 'cl-old-struct-compat-mode' is marked as obsolete.
|
||
You may need to recompile our code if it was compiled with Emacs < 24.3.
|
||
|
||
+++
|
||
** New macro 'static-if' for conditional evaluation of code.
|
||
This macro hides a form from the evaluator or byte-compiler based on a
|
||
compile-time condition. This is handy for avoiding byte-compilation
|
||
warnings about code that will never actually run under some
|
||
conditions.
|
||
|
||
+++
|
||
** Desktop notifications are now supported on the Haiku operating system.
|
||
The new function 'haiku-notifications-notify' provides a subset of the
|
||
capabilities of the 'notifications-notify' function in a manner
|
||
analogous to 'w32-notification-notify'.
|
||
|
||
** New variable 'haiku-pass-control-tab-to-system'.
|
||
This sets whether Emacs should pass 'C-TAB' on to the system instead of
|
||
handling it, fixing a problem where window switching would not activate
|
||
if an Emacs frame had focus on the Haiku operation system.
|
||
|
||
+++
|
||
** New value 'if-regular' for the REPLACE argument to 'insert-file-contents'.
|
||
It results in 'insert-file-contents' erasing the buffer instead of
|
||
preserving markers if the file being inserted is not a regular file,
|
||
rather than signaling an error.
|
||
|
||
+++
|
||
** New variable 'current-key-remap-sequence'.
|
||
It is bound to the key sequence that caused a call to a function bound
|
||
within 'function-key-map' or 'input-decode-map' around those calls.
|
||
|
||
+++
|
||
** New variables describing the names of built in programs.
|
||
The new variables 'ctags-program-name', 'ebrowse-program-name',
|
||
'etags-program-name', 'hexl-program-name', 'emacsclient-program-name'
|
||
'movemail-program-name', and 'rcs2log-program-name' should be used
|
||
instead of "ctags", "ebrowse", "etags", "hexl", "emacsclient", and
|
||
"rcs2log", when starting one of these built in programs in a
|
||
subprocess.
|
||
|
||
+++
|
||
** New variable 'case-symbols-as-words' affects case operations for symbols.
|
||
If non-nil, then case operations such as 'upcase-initials' or
|
||
'replace-match' (with nil FIXEDCASE) will treat the entire symbol name
|
||
as a single word. This is useful for programming languages and styles
|
||
where only the first letter of a symbol's name is ever capitalized.
|
||
The default value of this variable is nil.
|
||
|
||
+++
|
||
** 'x-popup-menu' now understands touch screen events.
|
||
When a 'touchscreen-begin' or 'touchscreen-end' event is passed as the
|
||
POSITION argument, it will behave as if that event was a mouse event.
|
||
|
||
+++
|
||
** New functions for handling touch screen events.
|
||
The new functions 'touch-screen-track-tap' and
|
||
'touch-screen-track-drag' handle tracking common touch screen gestures
|
||
from within a command.
|
||
|
||
** New user option 'safe-local-variable-directories'.
|
||
This user option names directories in which Emacs will treat all
|
||
directory-local variables as safe.
|
||
|
||
+++
|
||
** New parameter to 'touchscreen-end' events.
|
||
CANCEL non-nil establishes that the touch sequence has been
|
||
intercepted by programs such as window managers and should be ignored
|
||
with Emacs.
|
||
|
||
** New variable 'inhibit-auto-fill' to temporarily prevent auto-fill.
|
||
|
||
+++
|
||
** New variable 'secondary-tool-bar-map'.
|
||
If non-nil, this variable contains a keymap of menu items that are
|
||
displayed along tool bar items inside 'tool-bar-map'.
|
||
|
||
** New variable 'completion-lazy-hilit'.
|
||
Lisp programs that present completion candidates may bind this
|
||
variable non-nil around calls to functions such as
|
||
'completion-all-completions'. This tells the underlying completion
|
||
styles to skip eager fontification of completion candidates, which
|
||
improves performance. Such a Lisp program can then use the
|
||
'completion-lazy-hilit' function to fontify candidates just in time.
|
||
|
||
** New primitive 'buffer-last-name'.
|
||
It returns the name of a buffer before the last time it was renamed or
|
||
killed.
|
||
|
||
** New primitive 'marker-last-position'.
|
||
It returns the last position of a marker in its buffer even if that
|
||
buffer has been killed. ('marker-position' would return nil in that
|
||
case.)
|
||
|
||
** Functions and variables to transpose sexps
|
||
|
||
+++
|
||
*** New helper variable 'transpose-sexps-function'.
|
||
Emacs now can set this variable to customize the behavior of the
|
||
'transpose-sexps' function.
|
||
|
||
+++
|
||
*** New function 'transpose-sexps-default-function'.
|
||
The previous implementation is moved into its own function, to be
|
||
bound by 'transpose-sexps-function'.
|
||
|
||
*** New function 'treesit-transpose-sexps'.
|
||
Tree-sitter now unconditionally sets 'transpose-sexps-function' for all
|
||
tree-sitter enabled modes. This functionality utilizes the new
|
||
'transpose-sexps-function'.
|
||
|
||
** Functions and variables to move by program statements
|
||
|
||
*** New variable 'forward-sentence-function'.
|
||
Major modes can now set this variable to customize the behavior of the
|
||
'forward-sentence' command.
|
||
|
||
*** New function 'forward-sentence-default-function'.
|
||
The previous implementation of 'forward-sentence' is moved into its
|
||
own function, to be bound by 'forward-sentence-function'.
|
||
|
||
*** New function 'treesit-forward-sentence'.
|
||
All tree-sitter enabled modes that define 'sentence' in
|
||
'treesit-thing-settings' now set 'forward-sentence-function' to call
|
||
'treesit-forward-sentence'.
|
||
|
||
** Functions and variables to move by program sexps
|
||
|
||
*** New function 'treesit-forward-sexp'.
|
||
Tree-sitter conditionally sets 'forward-sexp-function' for major modes
|
||
that have defined 'sexp' in 'treesit-thing-settings' to enable
|
||
sexp-related motion commands.
|
||
|
||
+++
|
||
** Returned strings are never docstrings.
|
||
Functions and macros whose bodies consist of a single string literal now
|
||
only return that string; it is not used as a docstring. Example:
|
||
|
||
(defun sing-a-song ()
|
||
"Sing a song.")
|
||
|
||
The above function returns the string '"Sing a song."' but has no
|
||
docstring. Previously, that string was used as both a docstring and
|
||
return value, which was never what the programmer wanted. If you want
|
||
the string to be a docstring, add an explicit return value.
|
||
|
||
This change applies to 'defun', 'defsubst', 'defmacro' and 'lambda'
|
||
forms; other defining forms such as 'cl-defun' already worked this way.
|
||
|
||
** New or changed byte-compilation warnings
|
||
|
||
---
|
||
*** Warn about missing 'lexical-binding' directive.
|
||
The compiler now warns if an Elisp file lacks the standard
|
||
'-*- lexical-binding: ... -*-' cookie on the first line.
|
||
This line typically looks something like
|
||
|
||
;;; My little pony mode -*- lexical-binding: t -*-
|
||
|
||
It is needed to inform the compiler about which dialect of ELisp
|
||
your code is using: the modern dialect with lexical binding or
|
||
the old dialect with only dynamic binding.
|
||
|
||
Lexical binding avoids some name conflicts and allows the compiler to
|
||
detect more mistakes and generate more efficient code, so it is
|
||
recommended. For how to adapt your code to lexical binding, see the
|
||
manual section "(elisp) Converting to Lexical Binding".
|
||
|
||
If your code cannot be converted to lexical binding, you can insert
|
||
the line
|
||
|
||
;;; -*- lexical-binding: nil -*-
|
||
|
||
first in the file to declare that it uses the old dialect.
|
||
|
||
---
|
||
*** Warn about empty bodies for more special forms and macros.
|
||
The compiler now warns about an empty body argument to 'when',
|
||
'unless', 'ignore-error' and 'with-suppressed-warnings' in addition to
|
||
the existing warnings for 'let' and 'let*'. Example:
|
||
|
||
(when (> x 2))
|
||
|
||
This warning can be suppressed using 'with-suppressed-warnings' with
|
||
the warning name 'empty-body'.
|
||
|
||
---
|
||
*** Warn about quoted error names in 'condition-case' and 'ignore-error'.
|
||
The compiler now warns about quoted condition (error) names
|
||
in 'condition-case' and 'ignore-error'. Example:
|
||
|
||
(condition-case nil
|
||
(/ x y)
|
||
('arith-error "division by zero"))
|
||
|
||
Quoting them adds the error name 'quote' to those handled or ignored
|
||
respectively, which was probably not intended.
|
||
|
||
---
|
||
*** Warn about comparison with literal constants without defined identity.
|
||
The compiler now warns about comparisons by identity with a literal
|
||
string, cons, vector, record, function, large integer or float as this
|
||
may not match any value at all. Example:
|
||
|
||
(eq x "hello")
|
||
|
||
Only literals for symbols and small integers (fixnums), including
|
||
characters, are guaranteed to have a consistent (unique) identity.
|
||
This warning applies to 'eq', 'eql', 'memq', 'memql', 'assq', 'rassq',
|
||
'remq' and 'delq'.
|
||
|
||
To compare by (structural) value, use 'equal', 'member', 'assoc',
|
||
'rassoc', 'remove' or 'delete' instead. Floats and bignums can also
|
||
be compared using 'eql', '=' and 'memql'. Function literals cannot be
|
||
compared reliably at all.
|
||
|
||
This warning can be suppressed using 'with-suppressed-warnings' with
|
||
the warning name 'suspicious'.
|
||
|
||
---
|
||
*** Warn about 'condition-case' without handlers.
|
||
The compiler now warns when the 'condition-case' form is used without
|
||
any actual handlers, as in
|
||
|
||
(condition-case nil (read buffer))
|
||
|
||
because it has no effect other than the execution of the body form.
|
||
In particular, no errors are caught or suppressed. If the intention
|
||
was to catch all errors, add an explicit handler for 'error', or use
|
||
'ignore-error' or 'ignore-errors'.
|
||
|
||
This warning can be suppressed using 'with-suppressed-warnings' with
|
||
the warning name 'suspicious'.
|
||
|
||
---
|
||
*** Warn about 'unwind-protect' without unwind forms.
|
||
The compiler now warns when the 'unwind-protect' form is used without
|
||
any unwind forms, as in
|
||
|
||
(unwind-protect (read buffer))
|
||
|
||
because the behavior is identical to that of the argument; there is
|
||
no protection of any kind. Perhaps the intended unwind forms have
|
||
been misplaced or forgotten, or the use of 'unwind-protect' could be
|
||
simplified away.
|
||
|
||
This warning can be suppressed using 'with-suppressed-warnings' with
|
||
the warning name 'suspicious'.
|
||
|
||
---
|
||
*** Warn about useless trailing 'cond' clauses.
|
||
The compiler now warns when a 'cond' form contains clauses following a
|
||
default (unconditional) clause. Example:
|
||
|
||
(cond ((= x 0) (say "none"))
|
||
(t (say "some"))
|
||
(say "goodbye"))
|
||
|
||
Such a clause will never be executed but is likely to be a mistake,
|
||
perhaps due to misplaced brackets.
|
||
|
||
This warning can be suppressed using 'with-suppressed-warnings' with
|
||
the warning name 'suspicious'.
|
||
|
||
---
|
||
*** Warn about mutation of constant values.
|
||
The compiler now warns about code that modifies program constants in
|
||
some obvious cases. Examples:
|
||
|
||
(setcar '(1 2) 7)
|
||
(aset [3 4] 0 8)
|
||
(aset "abc" 1 ?d)
|
||
|
||
Such code may have unpredictable behavior because the constants are
|
||
part of the program, not data structures generated afresh during
|
||
execution, and the compiler does not expect them to change.
|
||
|
||
To avoid the warning, operate on an object created by the program
|
||
(maybe a copy of the constant), or use a non-destructive operation
|
||
instead.
|
||
|
||
This warning can be suppressed using 'with-suppressed-warnings' with
|
||
the warning name 'mutate-constant'.
|
||
|
||
---
|
||
*** Warn about more ignored function return values.
|
||
The compiler now warns when the return value from certain functions is
|
||
implicitly ignored. Example:
|
||
|
||
(progn (nreverse my-list) my-list)
|
||
|
||
will elicit a warning because it is usually pointless to call
|
||
'nreverse' on a list without using the returned value.
|
||
|
||
To silence the warning, make use of the value in some way, such as
|
||
assigning it to a variable. You can also wrap the function call in
|
||
'(ignore ...)', or use 'with-suppressed-warnings' with the warning
|
||
name 'ignored-return-value'.
|
||
|
||
The warning will only be issued for calls to functions declared
|
||
'important-return-value' or 'side-effect-free' (but not 'error-free').
|
||
|
||
---
|
||
*** Warn about docstrings that contain control characters.
|
||
The compiler now warns about docstrings with control characters other
|
||
than newline and tab. This is often a result of improper escaping.
|
||
Example:
|
||
|
||
(defun my-fun ()
|
||
"Uses c:\remote\dir\files and the key \C-x."
|
||
...)
|
||
|
||
where the docstring contains the four control characters 'CR', 'DEL',
|
||
'FF' and 'C-x'.
|
||
|
||
The warning name is 'docstrings-control-chars'.
|
||
|
||
---
|
||
*** The warning about wide docstrings can now be disabled separately.
|
||
Its warning name is 'docstrings-wide'.
|
||
|
||
---
|
||
** New user option 'native-comp-async-warnings-errors-kind'.
|
||
It allows control of what kinds of warnings and errors from asynchronous
|
||
native compilation are reported to the parent Emacs process. The
|
||
default is to report all errors and only important warnings. If you
|
||
were used to customizing 'native-comp-async-report-warnings-errors' to
|
||
nil or 'silent', we suggest that you now leave it at its default value,
|
||
and see if you get only warnings that matter.
|
||
|
||
** Function 'declare' forms
|
||
|
||
+++
|
||
*** New 'ftype' function declaration.
|
||
The declaration '(ftype TYPE)' specifies the type of a function.
|
||
Example:
|
||
|
||
(defun hello (x y)
|
||
(declare (ftype (function (integer boolean) string)))
|
||
...)
|
||
|
||
specifies that the function takes two arguments, an integer and a
|
||
boolean, and returns a string. If the compilation happens with
|
||
'compilation-safety' set to zero, this information can be used by the
|
||
native compiler to produce better code, but specifying an incorrect type
|
||
may lead to Emacs crashing. See the Info node "(elisp) Declare Form"
|
||
for further information.
|
||
|
||
+++
|
||
*** New 'important-return-value' function declaration and property.
|
||
The declaration '(important-return-value t)' sets the
|
||
'important-return-value' property which indicates that the function
|
||
return value should probably not be thrown away implicitly.
|
||
|
||
** Bytecode is now always loaded eagerly.
|
||
Bytecode compiled with older Emacs versions for lazy loading using
|
||
'byte-compile-dynamic' is now loaded all at once.
|
||
As a consequence, 'fetch-bytecode' has no use, does nothing, and is
|
||
now obsolete. The variable 'byte-compile-dynamic' has no effect any
|
||
more; compilation will always yield bytecode for eager loading.
|
||
|
||
+++
|
||
** New functions 'file-user-uid' and 'file-group-gid'.
|
||
These functions are like 'user-uid' and 'group-gid', respectively, but
|
||
are aware of file name handlers, so they will return the remote UID or
|
||
GID for remote files (or -1 if the connection has no associated user).
|
||
|
||
+++
|
||
** 'fset', 'defalias' and 'defvaralias' now signal an error for cyclic aliases.
|
||
Previously, 'fset', 'defalias' and 'defvaralias' could be made to
|
||
build circular function and variable indirection chains as in
|
||
|
||
(defalias 'able 'baker)
|
||
(defalias 'baker 'able)
|
||
|
||
but trying to use them would sometimes make Emacs hang. Now, an attempt
|
||
to create such a loop results in an error.
|
||
|
||
Since circular alias chains now cannot occur, 'function-alias-p',
|
||
'indirect-function' and 'indirect-variable' will never signal an error.
|
||
Their 'noerror' arguments have no effect and are therefore obsolete.
|
||
|
||
+++
|
||
** 'treesit-font-lock-rules' now accepts additional global keywords.
|
||
When supplied with ':default-language LANGUAGE', rules after it will
|
||
default to use 'LANGUAGE'.
|
||
|
||
---
|
||
** New optional argument to 'modify-dir-local-variable'.
|
||
A 5th argument, optional, has been added to
|
||
'modify-dir-local-variable'. It can be used to specify which
|
||
dir-locals file to modify.
|
||
|
||
** Connection local variables
|
||
|
||
+++
|
||
*** New macros 'connection-local-p' and 'connection-local-value'.
|
||
The former macro returns non-nil if a variable has a connection-local
|
||
binding. The latter macro returns the connection-local value of a
|
||
variable if any, or its current value.
|
||
|
||
** Hash tables
|
||
|
||
+++
|
||
*** ':rehash-size' and ':rehash-threshold' args no longer have any effect.
|
||
These keyword arguments are now ignored by 'make-hash-table'. Emacs
|
||
manages the memory for all hash table objects in the same way.
|
||
The functions 'hash-table-rehash-size' and 'hash-table-rehash-threshold'
|
||
remain for compatibility but now always return the old default values.
|
||
|
||
+++
|
||
*** The printed representation has been shrunk and simplified.
|
||
The 'test' parameter is omitted if it is 'eql' (the default), as is
|
||
'data' if empty. 'rehash-size', 'rehash-threshold' and 'size' are
|
||
always omitted, and ignored if present when the object is read back in.
|
||
|
||
** Obarrays
|
||
|
||
+++
|
||
*** New obarray type.
|
||
Obarrays are now represented by an opaque type instead of using vectors.
|
||
They are created by 'obarray-make' and manage their internal storage
|
||
automatically, which means that the size parameter to 'obarray-make' can
|
||
safely be omitted. That is, they do not become slower as they fill up.
|
||
|
||
The old vector representation is still accepted by functions operating
|
||
on obarrays, but 'obarrayp' only returns t for obarray objects.
|
||
'type-of' now returns 'obarray' for obarray objects.
|
||
|
||
Old code which (incorrectly) created "obarrays" as Lisp vectors filled
|
||
with something other than 0, as in '(make-vector N nil)', will no longer
|
||
work, and should be rewritten to use 'obarray-make'. Alternatively, you
|
||
can fill the vector with 0.
|
||
|
||
+++
|
||
*** New function 'obarray-clear' removes all symbols from an obarray.
|
||
|
||
---
|
||
*** 'obarray-size' and 'obarray-default-size' are now obsolete.
|
||
They pertained to the internal storage size which is now irrelevant.
|
||
|
||
+++
|
||
** 'treesit-install-language-grammar' can handle local directory instead of URL.
|
||
It is now possible to pass a directory of a local repository as URL
|
||
inside 'treesit-language-source-alist', so that calling
|
||
'treesit-install-language-grammar' would avoid cloning the repository.
|
||
It may be useful, for example, for the purposes of bisecting a
|
||
treesitter grammar.
|
||
|
||
+++
|
||
** New buffer-local variable 'tabulated-list-groups'.
|
||
It controls display and separate sorting of groups of entries.
|
||
|
||
---
|
||
** New text property 'context-menu-functions'.
|
||
Like the variable with the same name, it adds menus from the list that
|
||
is the value of the property to context menus shown when clicking on the
|
||
text which as this property.
|
||
|
||
---
|
||
** Detecting the end of an iteration of a keyboard macro.
|
||
'read-event', 'read-char', and 'read-char-exclusive' no longer return -1
|
||
when called at the end of an iteration of the execution of a keyboard
|
||
macro. Instead, they will transparently continue reading available input
|
||
(e.g., from the keyboard). If you need to detect the end of a macro
|
||
iteration, check the following condition before calling one of the
|
||
aforementioned functions:
|
||
|
||
(and (arrayp executing-kbd-macro)
|
||
(>= executing-kbd-macro-index (length executing-kbd-macro)))
|
||
|
||
+++
|
||
** 'vtable-update-object' updates an existing object with just two arguments.
|
||
It is now possible to update the representation of an object in a vtable
|
||
by calling 'vtable-update-object' with just the vtable and the object as
|
||
arguments. (Previously the 'old-object' argument was required which, in
|
||
this case, would mean repeating the object in the argument list.) When
|
||
replacing an object with a different one, passing both the new and old
|
||
objects is still necessary.
|
||
|
||
** 'vtable-insert-object' can insert "before" or at an index.
|
||
The signature of 'vtable-insert-object' has changed and is now:
|
||
|
||
(vtable-insert-object table object &optional location before)
|
||
|
||
'location' corresponds to the old 'after-object' argument; if 'before'
|
||
is non-nil, the new object is inserted before the 'location' object,
|
||
making it possible to insert a new object at the top of the
|
||
table. (Before, this was not possible.) In addition, 'location' can be
|
||
an integer, a (zero-based) index into the table at which the new object
|
||
is inserted ('before' is ignored in this case).
|
||
|
||
|
||
** JSON
|
||
|
||
---
|
||
*** The parser keeps duplicated object keys in alist and plist output.
|
||
A JSON object such as '{"a":1,"a":2}' will now be translated into the
|
||
Lisp values '((a . 1) (a . 2))' or '(:a 1 :a 2)' if alist or plist
|
||
object types are requested.
|
||
|
||
---
|
||
*** The parser sometimes signals different types of errors.
|
||
It will now signal 'json-utf8-decode-error' for inputs that are not
|
||
correctly UTF-8 encoded.
|
||
|
||
---
|
||
*** The parser and encoder now accept arbitrarily large integers.
|
||
Previously, they were limited to the range of signed 64-bit integers.
|
||
|
||
** New tree-sitter functions and variables for defining and using "things"
|
||
|
||
+++
|
||
*** New variable 'treesit-thing-settings'.
|
||
It allows modes to define "things" like 'defun', 'text', 'sexp', and
|
||
'sentence' for navigation commands and tree-traversal functions.
|
||
|
||
+++
|
||
*** New functions for navigating "things".
|
||
There are new navigation functions 'treesit-thing-prev',
|
||
'treesit-thing-next', 'treesit-navigate-thing',
|
||
'treesit-beginning-of-thing', and 'treesit-end-of-thing'.
|
||
|
||
+++
|
||
*** New functions 'treesit-thing-at', 'treesit-thing-at-point'.
|
||
|
||
+++
|
||
*** Tree-traversing functions.
|
||
The functions 'treesit-search-subtree', 'treesit-search-forward',
|
||
'treesit-search-forward-goto', and 'treesit-induce-sparse-tree' now
|
||
accept more kinds of predicates. Lisp programs can now use thing
|
||
symbols (defined in 'treesit-thing-settings') and any thing definitions
|
||
for the predicate argument.
|
||
|
||
** Other tree-sitter function and variable changes
|
||
|
||
+++
|
||
*** 'treesit-parser-list' now takes additional optional arguments.
|
||
The additional arguments are LANGUAGE and TAG. If LANGUAGE is given,
|
||
only return parsers for that language. If TAG is given, only return
|
||
parsers with that tag. Note that passing nil as tag doesn't mean return
|
||
all parsers, but rather "all parsers with no tags".
|
||
|
||
+++
|
||
*** New function 'treesit-parser-changed-ranges'.
|
||
This function returns buffer regions that are affected by the last
|
||
buffer edits.
|
||
|
||
*** New function 'treesit-add-font-lock-rules'.
|
||
This function helps users to add custom font-lock rules to a tree-sitter
|
||
major mode.
|
||
|
||
---
|
||
** The variable 'rx-constituents' is now obsolete.
|
||
Use 'rx-define', 'rx-let' and 'rx-let-eval' instead.
|
||
|
||
---
|
||
** 'defvar-keymap' can specify hints for 'repeat-mode'.
|
||
Using ':repeat (:hints ((command . "hint") ...))' will show
|
||
the hint string in the echo area together with repeatable keys.
|
||
|
||
|
||
* Changes in Emacs 30.1 on Non-Free Operating Systems
|
||
|
||
** MS-Windows
|
||
|
||
+++
|
||
*** You can now opt out of following the system's Dark mode.
|
||
By default, Emacs on MS-Windows follows the system's Dark mode for its
|
||
title bars' and scroll bars' appearance. If the new user option
|
||
'w32-follow-system-dark-mode' is customized to the nil value, Emacs
|
||
will disregard the system's Dark mode and will always use the default
|
||
Light mode.
|
||
|
||
|
||
----------------------------------------------------------------------
|
||
This file is part of GNU Emacs.
|
||
|
||
GNU Emacs is free software: you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation, either version 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
GNU Emacs is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
|
||
|
||
|
||
Local variables:
|
||
coding: utf-8
|
||
mode: outline
|
||
mode: emacs-news
|
||
paragraph-separate: "[ ]"
|
||
end:
|