These changes contain some minor refactorings to conditionally disable
the use of packages that are cannot be built for `GOOS=js GOARCH=wasm`.
With these edits, `pkg/display` can be built targeting WASM.
These changes act as a safeguard to ensure that we are not adding
additional code that will _prevent_ building `pkg/display` for WASM
targets. They are not sufficient to produce a version of the display
renderer that is appropriate for actual use in a WASM environment:
- The current renderer API is not well-suited for use outside the
context of the CLI
- The current event stream format has no versioning data
- Actually building this code into a WASM module results in an
unpleasantly large file (70M uncompressed, 13M gzipped)
These changes also add a size gate for the built WASM module. The gate
is set to the 110% of the size of the WASM module as of this commit. Our
goal is to lower the size of the WASM module over time; as we do so we
will tighten this gate.
Part of #13258.
Adds a new **currently unused** function TerminateProcessGroup
that terminates all processes in a group gracefully.
It does so by first sending the process
a SIGINT on Unix systems, and CTRL_BREAK_EVENT on Windows,
and waiting a specified duration for the process to exit.
The choice of signals was very deliberate
and is documented in the comments for TerminateProcessGroup.
If the process does not exit in the given duration,
it and its child processes are forcibly terminated
with SIGKILL or equivalent.
Testing:
The core behaviors are tested against Python, Go, and Node.
The corner cases of signal handling are tested
against rogue Go processes.
The changes were experimented with in #13760.
Refs #9780