// CheckAndUpdate checks whether we should update Please and does so if needed.
// If it requires an update it will never return, it will either die on failure or on success will exec the new Please.
// Conversely, if an update isn't required it will return. It may adjust the version in the configuration.
// updatesEnabled indicates whether updates are enabled (i.e. not run with --noupdate)
// updateCommand indicates whether an update is specifically requested (due to e.g. `plz update`)
// forceUpdate indicates whether the user passed --force on the command line, in which case we
// will always update even if the version exists.
func CheckAndUpdate(config *core.Configuration, updatesEnabled, updateCommand, forceUpdate bool) {
if !forceUpdate && !shouldUpdate(config, updatesEnabled, updateCommand) {
return
}
word := describe(config.Please.Version, core.PleaseVersion, true)
log.Warning("%s to Please version %s (currently %s)", word, config.Please.Version, core.PleaseVersion)
// Must lock here so that the update process doesn't race when running two instances
// simultaneously.
core.AcquireRepoLock()
defer core.ReleaseRepoLock()
// If the destination exists and the user passed --force, remove it to force a redownload.
newDir := core.ExpandHomePath(path.Join(config.Please.Location, config.Please.Version.String()))
log.Notice("%s", newDir)
if forceUpdate && core.PathExists(newDir) {
if err := os.RemoveAll(newDir); err != nil {
log.Fatalf("Failed to remove existing directory: %s", err)
}
}
// Download it.
newPlease := downloadAndLinkPlease(config)
// Now run the new one.
args := append([]string{newPlease}, os.Args[1:]...)
log.Info("Executing %s", strings.Join(args, " "))
if err := syscall.Exec(newPlease, args, os.Environ()); err != nil {
log.Fatalf("Failed to exec new Please version %s: %s", newPlease, err)
}
// Shouldn't ever get here. We should have either exec'd or died above.
panic("please update failed in an an unexpected and exciting way")
}
func Please(targets []core.BuildLabel, config *core.Configuration, prettyOutput, shouldBuild, shouldTest bool) (bool, *core.BuildState) {
if opts.BuildFlags.NumThreads > 0 {
config.Please.NumThreads = opts.BuildFlags.NumThreads
} else if config.Please.NumThreads <= 0 {
config.Please.NumThreads = runtime.NumCPU() + 2
}
if opts.NoCacheCleaner {
config.Cache.DirCacheCleaner = ""
}
if opts.BuildFlags.Config != "" {
config.Build.Config = opts.BuildFlags.Config
}
var c *core.Cache
if !opts.FeatureFlags.NoCache {
c = cache.NewCache(config)
}
state := core.NewBuildState(config.Please.NumThreads, c, opts.OutputFlags.Verbosity, config)
state.VerifyHashes = !opts.FeatureFlags.NoHashVerification
state.NumTestRuns = opts.Test.NumRuns + opts.Cover.NumRuns // Only one of these can be passed.
state.TestArgs = append(opts.Test.Args.Args, opts.Cover.Args.Args...) // Similarly here.
state.NeedCoverage = !opts.Cover.Args.Target.IsEmpty()
state.NeedBuild = shouldBuild
state.NeedTests = shouldTest
state.NeedHashesOnly = len(opts.Hash.Args.Targets) > 0
state.PrepareOnly = opts.Build.Prepare
state.CleanWorkdirs = !opts.FeatureFlags.KeepWorkdirs
state.ForceRebuild = len(opts.Rebuild.Args.Targets) > 0
state.ShowTestOutput = opts.Test.ShowOutput || opts.Cover.ShowOutput
state.ShowAllOutput = opts.OutputFlags.ShowAllOutput
state.SetIncludeAndExclude(opts.BuildFlags.Include, opts.BuildFlags.Exclude)
metrics.InitFromConfig(config)
// Acquire the lock before we start building
if (shouldBuild || shouldTest) && !opts.FeatureFlags.NoLock {
core.AcquireRepoLock()
defer core.ReleaseRepoLock()
}
if opts.BuildFlags.Engine != "" {
state.Config.Please.ParserEngine = opts.BuildFlags.Engine
}
// Start looking for the initial targets to kick the build off
go findOriginalTasks(state, targets)
// Start up all the build workers
var wg sync.WaitGroup
wg.Add(config.Please.NumThreads)
for i := 0; i < config.Please.NumThreads; i++ {
go func(tid int) {
please(tid, state, opts.ParsePackageOnly, opts.BuildFlags.Include, opts.BuildFlags.Exclude)
wg.Done()
}(i)
}
// Wait until they've all exited, which they'll do once they have no tasks left.
go func() {
wg.Wait()
close(state.Results) // This will signal MonitorState (below) to stop.
}()
// Draw stuff to the screen while there are still results coming through.
shouldRun := !opts.Run.Args.Target.IsEmpty()
success := output.MonitorState(state, config.Please.NumThreads, !prettyOutput, opts.BuildFlags.KeepGoing, shouldBuild, shouldTest, shouldRun, opts.OutputFlags.TraceFile)
metrics.Stop()
if c != nil {
(*c).Shutdown()
}
return success, state
}