mirror of https://github.com/pulumi/pulumi.git
185 lines
5.0 KiB
Go
185 lines
5.0 KiB
Go
// Copyright 2016-2019, Pulumi Corporation.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package backend
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import (
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"bufio"
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"context"
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"errors"
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"fmt"
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"os"
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"os/exec"
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"path"
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"path/filepath"
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"runtime"
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"strings"
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"time"
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"github.com/pulumi/pulumi/pkg/v3/backend/display"
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"github.com/pulumi/pulumi/pkg/v3/operations"
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"github.com/pulumi/pulumi/sdk/v3/go/common/apitype"
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"github.com/pulumi/pulumi/sdk/v3/go/common/diag/colors"
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"github.com/pulumi/pulumi/sdk/v3/go/common/util/cmdutil"
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"github.com/pulumi/pulumi/sdk/v3/go/common/util/contract"
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"github.com/pulumi/pulumi/sdk/v3/go/common/util/logging"
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"github.com/pulumi/pulumi/sdk/v3/go/common/util/result"
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)
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// Watch watches the project's working directory for changes and automatically updates the active
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// stack.
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func Watch(ctx context.Context, b Backend, stack Stack, op UpdateOperation,
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apply Applier, paths []string,
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) result.Result {
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opts := ApplierOptions{
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DryRun: false,
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ShowLink: false,
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}
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startTime := time.Now()
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go func() {
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shown := map[operations.LogEntry]bool{}
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for {
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logs, err := b.GetLogs(ctx, op.SecretsProvider, stack, op.StackConfiguration, operations.LogQuery{
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StartTime: &startTime,
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})
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if err != nil {
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logging.V(5).Infof("failed to get logs: %v", err.Error())
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}
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for _, logEntry := range logs {
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if _, shownAlready := shown[logEntry]; !shownAlready {
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eventTime := time.Unix(0, logEntry.Timestamp*1000000)
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message := strings.TrimRight(logEntry.Message, "\n")
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display.PrintfWithWatchPrefix(eventTime, logEntry.ID, "%s\n", message)
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shown[logEntry] = true
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}
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}
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time.Sleep(10 * time.Second)
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}
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}()
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// Provided paths can be both relative and absolute.
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events, stop, err := watchPaths(op.Root, paths)
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if err != nil {
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return result.FromError(err)
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}
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defer stop()
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fmt.Printf(op.Opts.Display.Color.Colorize(
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colors.SpecHeadline+"Watching (%s):"+colors.Reset+"\n"), stack.Ref())
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for range events {
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display.PrintfWithWatchPrefix(time.Now(), "",
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op.Opts.Display.Color.Colorize(colors.SpecImportant+"Updating..."+colors.Reset+"\n"))
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// Perform the update operation
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_, _, res := apply(ctx, apitype.UpdateUpdate, stack, op, opts, nil)
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if res != nil {
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logging.V(5).Infof("watch update failed: %v", res.Error())
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if res.Error() == context.Canceled {
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return res
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}
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display.PrintfWithWatchPrefix(time.Now(), "",
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op.Opts.Display.Color.Colorize(colors.SpecImportant+"Update failed."+colors.Reset+"\n"))
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} else {
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display.PrintfWithWatchPrefix(time.Now(), "",
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op.Opts.Display.Color.Colorize(colors.SpecImportant+"Update complete."+colors.Reset+"\n"))
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}
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}
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return nil
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}
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func watchPaths(root string, paths []string) (chan string, func(), error) {
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args := []string{"--origin", root}
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for _, p := range paths {
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watchPath := ""
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if path.IsAbs(p) {
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watchPath = p
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} else {
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watchPath = path.Join(root, p)
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}
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args = append(args, "--watch", watchPath)
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}
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watchCmd, err := getWatchUtil()
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if err != nil {
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return nil, nil, err
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}
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cmd := exec.Command(watchCmd, args...)
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cmdutil.RegisterProcessGroup(cmd)
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reader, _ := cmd.StdoutPipe()
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scanner := bufio.NewScanner(reader)
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events := make(chan string)
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go stdoutToChannel(scanner, events)
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err = cmd.Start()
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if err != nil {
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return nil, nil, fmt.Errorf("error starting pulumi-watch: %w", err)
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}
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stop := func() {
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err := cmd.Process.Kill()
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contract.AssertNoErrorf(err, "Unexpected error stopping pulumi-watch process: %v", err)
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}
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return events, stop, nil
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}
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const windowsGOOS = "windows"
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func getWatchUtil() (string, error) {
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program := "pulumi-watch"
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if runtime.GOOS == windowsGOOS {
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program = "pulumi-watch.exe"
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}
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watchCmd, err := exec.LookPath("pulumi-watch")
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if err == nil {
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return watchCmd, nil
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}
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exePath, exeErr := os.Executable()
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if exeErr == nil {
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fullPath, fullErr := filepath.EvalSymlinks(exePath)
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if fullErr == nil {
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candidate := filepath.Join(filepath.Dir(fullPath), program)
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// Let's see if the file is executable. On Windows, os.Stat() returns a mode of "-rw-rw-rw" so on
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// on windows we just trust the fact that the .exe can actually be launched.
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if stat, err := os.Stat(candidate); err == nil {
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if stat.Mode()&0o100 != 0 || runtime.GOOS == windowsGOOS {
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return candidate, nil
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}
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return "", fmt.Errorf("Could not locate an executable pulumi-watch, found %v without execute bit", fullPath)
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}
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}
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}
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return "", errors.New("Could not locate pulumi-watch binary")
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}
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func stdoutToChannel(scanner *bufio.Scanner, out chan string) {
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for scanner.Scan() {
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out <- scanner.Text()
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}
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}
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