const buildIDSeparator = "/"

// actionID returns the action ID half of a build ID.
func actionID(buildID string) string {
	i := strings.Index(buildID, buildIDSeparator)
	if i < 0 {
		return buildID
	}
	return buildID[:i]
}

// contentID returns the content ID half of a build ID.
func contentID(buildID string) string {
	return buildID[strings.LastIndex(buildID, buildIDSeparator)+1:]
}

	telemetry.CountFlags("buildid/flag:", *flag.CommandLine)
	if flag.NArg() != 1 {
		usage()
	}

	file := flag.Arg(0)
	id, err := buildid.ReadFile(file)
	if err != nil {
		log.Fatal(err)
	}
	if !*wflag {
		fmt.Printf("%s\n", id)
		return
	}

	// Keep in sync with src/cmd/go/internal/work/buildid.go:updateBuildID

	f, err := os.Open(file)
	if err != nil {
		log.Fatal(err)
	}

	const buildID = "TestNoteReading-Build-ID"
	tg.run("build", "-ldflags", "-buildid="+buildID, "-o", tg.path("hello.exe"), tg.path("hello.go"))
	id, err := buildid.ReadFile(tg.path("hello.exe"))
	if err != nil {
		t.Fatalf("reading build ID from hello binary: %v", err)
	}
	if id != buildID {
		t.Fatalf("buildID in hello binary = %q, want %q", id, buildID)
	}

	switch {
	case !testenv.HasCGO():

// made to obtain the buildID information.
func (b *profileBuilder) readMapping() {
	if !machVMInfo(b.addMapping) {
		b.addMappingEntry(0, 0, 0, "", "", true)
	}
}

func readMainModuleMapping() (start, end uint64, exe, buildID string, err error) {
	first := true
	ok := machVMInfo(func(lo, hi, off uint64, file, build string) {
		if first {
			start, end = lo, hi

			var fileNames []string
			if m.BuildID != "" {
				fileNames = []string{filepath.Join(path, m.BuildID, baseName)}
				if matches, err := filepath.Glob(filepath.Join(path, m.BuildID, "*")); err == nil {
					fileNames = append(fileNames, matches...)
				}
				fileNames = append(fileNames, filepath.Join(path, noVolumeFile, m.BuildID)) // perf path format
				// Llvm buildid protocol: the first two characters of the build id

    @Nullable
    private final String buildId;
    private final ChecksumService checksumService;

    public ModuleMetadataJsonWriter(
        JsonWriter jsonWriter,
        ModuleMetadataSpec metadata,
        @Nullable String buildId,
        ChecksumService checksumService
    ) {
        super(jsonWriter);
        this.metadata = metadata;
        this.buildId = buildId;
        this.checksumService = checksumService;

# check that PGO appears in build info
# N.B. we can't start the stdout check with -pgo because the script assumes that
# if the first arg starts with - it is a grep flag.
go version -m triv.exe
stdout 'build\s+-pgo=.*'${/}'prof'

# store the build ID
go list -export -json=BuildID -pgo=prof triv.go
stdout '"BuildID":' # check that output actually contains a build ID
cp stdout list.out

		// the binary's build ID, so it is the same hash used in
		// compiling and linking.
		// When compiling, we use actionID/actionID (instead of
		// actionID/contentID) as a temporary build ID to compute
		// the hash. Do the same here. (See buildid.go:useCache)
		// The build ID matters because it affects the overall hash
		// in the plugin's pseudo-import path returned below.

stale -cover m/example

# Collect build ID from for m/example built with -cover.
go list -cover -export -f '{{.BuildID}}' m/example
cp stdout $WORK/listbuildid.txt

# Now build the m/example binary with coverage.
go build -cover -o $WORK/m.exe m/example

# Ask for the binary build ID by running "go tool buildid".
go tool buildid $WORK/m.exe
cp stdout $WORK/rawtoolbuildid.txt

# Make sure that the two build IDs agree with respect to the

        }

        def projectId(String projectName) {
            def buildId = $buildId
            def projectPath = $projectPath
            return project.services.get(${BuildStateRegistry.name}).getBuild(buildId).projects.getProject(${Path.name}.path(projectPath)).componentIdentifier
        }
"""
    }