Golang BuildTarget.HasLabel方法代码示例

func checkAndReplaceSequence(target, dep *core.BuildTarget, in string, runnable, multiple, dir, outPrefix, hash, test, allOutputs, tool bool) string {
	if allOutputs && !multiple && len(dep.Outputs()) != 1 {
		// Label must have only one output.
		panic(fmt.Sprintf("Rule %s can't use %s; %s has multiple outputs.", target.Label, in, dep.Label))
	} else if runnable && !dep.IsBinary {
		panic(fmt.Sprintf("Rule %s can't $(exe %s), it's not executable", target.Label, dep.Label))
	} else if runnable && len(dep.Outputs()) == 0 {
		panic(fmt.Sprintf("Rule %s is tagged as binary but produces no output.", dep.Label))
	}
	if hash {
		return base64.RawURLEncoding.EncodeToString(mustShortTargetHash(core.State, dep))
	}
	output := ""
	for _, out := range dep.Outputs() {
		if allOutputs || out == in {
			if tool {
				abs, err := filepath.Abs(handleDir(dep.OutDir(), out, dir))
				if err != nil {
					log.Fatalf("Couldn't calculate relative path: %s", err)
				}
				output += quote(abs) + " "
			} else {
				output += quote(fileDestination(target, dep, out, dir, outPrefix, test)) + " "
			}
			if dir {
				break
			}
		}
	}
	if runnable && dep.HasLabel("java_non_exe") {
		// The target is a Java target that isn't self-executable, hence it needs something to run it.
		output = "java -jar " + output
	}
	return strings.TrimRight(output, " ")
}

// buildFilegroup runs the manual build steps for a filegroup rule.
// We don't force this to be done in bash to avoid errors with maximum command lengths,
// and it's actually quite fiddly to get just so there.
func buildFilegroup(tid int, state *core.BuildState, target *core.BuildTarget) error {
	if err := prepareDirectory(target.OutDir(), false); err != nil {
		return err
	}
	if err := os.RemoveAll(ruleHashFileName(target)); err != nil {
		return err
	}
	changed := false
	outDir := target.OutDir()
	for _, source := range target.Sources {
		fullPaths := source.FullPaths(state.Graph)
		for i, sourcePath := range source.LocalPaths(state.Graph) {
			outPath := path.Join(outDir, sourcePath)
			c, err := moveOutput(target, fullPaths[i], outPath, true)
			if err != nil {
				return err
			}
			changed = changed || c
		}
	}
	if target.HasLabel("py") && !target.IsBinary {
		// Pre-emptively create __init__.py files so the outputs can be loaded dynamically.
		// It's a bit cheeky to do non-essential language-specific logic but this enables
		// a lot of relatively normal Python workflows.
		// Errors are deliberately ignored.
		createInitPy(outDir)
	}
	if _, err := calculateAndCheckRuleHash(state, target); err != nil {
		return err
	} else if changed {
		target.SetState(core.Built)
	} else {
		target.SetState(core.Unchanged)
	}
	state.LogBuildResult(tid, target.Label, core.TargetBuilt, "Built")
	return nil
}