func()

in newt/builder/build.go [638:728]

• 71 lines of code
• 18 McCabe index (conditional complexity)

func (b *Builder) Build() error {
	b.CleanArtifacts()

	// Build the packages alphabetically to ensure a consistent order.
	bpkgs := b.sortedBuildPackages()

	// Calculate the list of jobs.  Each record represents a single file that
	// needs to be compiled.
	entries := []toolchain.CompilerJob{}
	bpkgCompilerMap := map[*BuildPackage]*toolchain.Compiler{}
	for _, bpkg := range bpkgs {
		subEntries, err := b.collectCompileEntriesBpkg(bpkg)
		if err != nil {
			return err
		}
		entries = append(entries, subEntries...)

		if len(subEntries) > 0 {
			bpkgCompilerMap[bpkg] = subEntries[0].Compiler
		}
	}

	// Build each file in parallel.
	jobs := make(chan toolchain.CompilerJob, len(entries))
	defer close(jobs)

	stop := make(chan struct{}, newtutil.NewtNumJobs)
	defer close(stop)

	errors := make(chan error, newtutil.NewtNumJobs)
	defer close(errors)

	for _, entry := range entries {
		jobs <- entry
	}

	for i := 0; i < newtutil.NewtNumJobs; i++ {
		go buildWorker(i, jobs, stop, errors)
	}

	var err error
	for i := 0; i < newtutil.NewtNumJobs; i++ {
		subErr := <-errors
		if err == nil && subErr != nil {
			err = subErr
		}
	}
	if err != nil {
		return err
	}

	for _, bpkg := range bpkgs {
		c := bpkgCompilerMap[bpkg]
		if c != nil {
			if err := b.createArchive(c, bpkg); err != nil {
				return err
			}
		}
	}

	var compileCommands []toolchain.CompileCommand

	for _, bpkg := range bpkgs {
		c := bpkgCompilerMap[bpkg]
		if c != nil {
			compileCommands = append(compileCommands,
				c.GetCompileCommands()...)
		}
	}

	projectPath := interfaces.GetProject().Path() + "/"
	for i := range compileCommands {
		compileCommands[i].Directory = projectPath
	}

	cmdBytes, err := json.MarshalIndent(compileCommands, "", "    ")
	if err != nil {
		log.Error("Unable to encode compilation commands as JSON")
		return nil
	}

	cmdPath := b.CompileCmdsPath()
	errWrite := ioutil.WriteFile(cmdPath, cmdBytes, 0644)
	if errWrite != nil {
		return util.FmtNewtError(
			"Unable to write compile_commands.json file; reason: %s",
			errWrite.Error())
	}

	return nil
}