Golang Package.IsCommand方法代码示例

//.........这里部分代码省略.........
	ctxt := build.Context{
		GOOS:          "linux",
		GOARCH:        "amd64",
		CgoEnabled:    true,
		ReleaseTags:   build.Default.ReleaseTags,
		JoinPath:      path.Join,
		IsAbsPath:     path.IsAbs,
		SplitPathList: func(list string) []string { return strings.Split(list, ":") },
		IsDir:         func(path string) bool { panic("unexpected") },
		HasSubdir:     func(root, dir string) (rel string, ok bool) { panic("unexpected") },
		ReadDir:       func(dir string) (fi []os.FileInfo, err error) { return b.readDir(dir) },
		OpenFile:      func(path string) (r io.ReadCloser, err error) { return b.openFile(path) },
		Compiler:      "gc",
	}

	var err error
	var bpkg *build.Package

	for _, env := range goEnvs {
		ctxt.GOOS = env.GOOS
		ctxt.GOARCH = env.GOARCH
		bpkg, err = ctxt.ImportDir("/", 0)
		if _, ok := err.(*build.NoGoError); !ok {
			break
		}
	}
	if err != nil {
		if _, ok := err.(*build.NoGoError); !ok {
			b.pdoc.Errors = append(b.pdoc.Errors, err.Error())
		}
		return b.pdoc, nil
	}

	// Parse the Go files

	files := make(map[string]*ast.File)
	names := append(bpkg.GoFiles, bpkg.CgoFiles...)
	sort.Strings(names)
	b.pdoc.Files = make([]*File, len(names))
	for i, name := range names {
		file, err := parser.ParseFile(b.fset, name, b.srcs[name].data, parser.ParseComments)
		if err != nil {
			b.pdoc.Errors = append(b.pdoc.Errors, err.Error())
			continue
		}
		src := b.srcs[name]
		src.index = i
		b.pdoc.Files[i] = &File{Name: name, URL: src.browseURL}
		b.pdoc.SourceSize += len(src.data)
		files[name] = file
	}

	apkg, _ := ast.NewPackage(b.fset, files, simpleImporter, nil)

	// Find examples in the test files.

	names = append(bpkg.TestGoFiles, bpkg.XTestGoFiles...)
	sort.Strings(names)
	b.pdoc.TestFiles = make([]*File, len(names))
	for i, name := range names {
		file, err := parser.ParseFile(b.fset, name, b.srcs[name].data, parser.ParseComments)
		if err != nil {
			b.pdoc.Errors = append(b.pdoc.Errors, err.Error())
			continue
		}
		b.pdoc.TestFiles[i] = &File{Name: name, URL: b.srcs[name].browseURL}
		b.pdoc.TestSourceSize += len(b.srcs[name].data)
		b.examples = append(b.examples, doc.Examples(file)...)
	}

	b.vetPackage(apkg)

	mode := doc.Mode(0)
	if b.pdoc.ImportPath == "builtin" {
		mode |= doc.AllDecls
	}

	dpkg := doc.New(apkg, b.pdoc.ImportPath, mode)

	b.pdoc.Name = dpkg.Name
	b.pdoc.Doc = strings.TrimRight(dpkg.Doc, " \t\n\r")
	b.pdoc.Synopsis = synopsis(b.pdoc.Doc)

	b.pdoc.Examples = b.getExamples("")
	b.pdoc.IsCmd = bpkg.IsCommand()
	b.pdoc.GOOS = ctxt.GOOS
	b.pdoc.GOARCH = ctxt.GOARCH

	b.pdoc.Consts = b.values(dpkg.Consts)
	b.pdoc.Funcs = b.funcs(dpkg.Funcs)
	b.pdoc.Types = b.types(dpkg.Types)
	b.pdoc.Vars = b.values(dpkg.Vars)
	b.pdoc.Notes = b.notes(dpkg.Notes)

	b.pdoc.Imports = bpkg.Imports
	b.pdoc.TestImports = bpkg.TestImports
	b.pdoc.XTestImports = bpkg.XTestImports

	return b.pdoc, nil
}

//.........这里部分代码省略.........
		ctxt.GOARCH = env.GOARCH
		// TODO(garyburd): Change second argument to build.ImportComment when
		// gddo is upgraded to Go 1.4.
		bpkg, err = dir.Import(&ctxt, 0 /* build.ImportComment */)
		if _, ok := err.(*build.NoGoError); !ok {
			break
		}
	}
	if err != nil {
		if _, ok := err.(*build.NoGoError); !ok {
			pkg.Errors = append(pkg.Errors, err.Error())
		}
		return pkg, nil
	}

	/*
		        TODO(garyburd): This block of code uses the import comment feature
		        added in Go 1.4. Uncomment this block when gddo upgraded to Go 1.4.
		        Also, change the second argument to dir.Import above from 0 to
		        build.ImportComment.

				if bpkg.ImportComment != "" && bpkg.ImportComment != dir.ImportPath {
					return nil, gosrc.NotFoundError{
						Message:  "not at canonical import path",
						Redirect: bpkg.ImportComment,
					}
				}
	*/

	// Parse the Go files

	files := make(map[string]*ast.File)
	names := append(bpkg.GoFiles, bpkg.CgoFiles...)
	sort.Strings(names)
	pkg.Files = make([]*File, len(names))
	for i, name := range names {
		file, err := parser.ParseFile(b.fset, name, b.srcs[name].data, parser.ParseComments)
		if err != nil {
			pkg.Errors = append(pkg.Errors, err.Error())
		} else {
			files[name] = file
		}
		src := b.srcs[name]
		src.index = i
		pkg.Files[i] = &File{Name: name, URL: src.browseURL}
		pkg.SourceSize += len(src.data)
	}

	apkg, _ := ast.NewPackage(b.fset, files, simpleImporter, nil)

	// Find examples in the test files.

	names = append(bpkg.TestGoFiles, bpkg.XTestGoFiles...)
	sort.Strings(names)
	pkg.TestFiles = make([]*File, len(names))
	for i, name := range names {
		file, err := parser.ParseFile(b.fset, name, b.srcs[name].data, parser.ParseComments)
		if err != nil {
			pkg.Errors = append(pkg.Errors, err.Error())
		} else {
			b.examples = append(b.examples, doc.Examples(file)...)
		}
		pkg.TestFiles[i] = &File{Name: name, URL: b.srcs[name].browseURL}
		pkg.TestSourceSize += len(b.srcs[name].data)
	}

	b.vetPackage(pkg, apkg)

	mode := doc.Mode(0)
	if pkg.ImportPath == "builtin" {
		mode |= doc.AllDecls
	}

	dpkg := doc.New(apkg, pkg.ImportPath, mode)

	if pkg.ImportPath == "builtin" {
		removeAssociations(dpkg)
	}

	pkg.Name = dpkg.Name
	pkg.Doc = strings.TrimRight(dpkg.Doc, " \t\n\r")
	pkg.Synopsis = synopsis(pkg.Doc)

	pkg.Examples = b.getExamples("")
	pkg.IsCmd = bpkg.IsCommand()
	pkg.GOOS = ctxt.GOOS
	pkg.GOARCH = ctxt.GOARCH

	pkg.Consts = b.values(dpkg.Consts)
	pkg.Funcs = b.funcs(dpkg.Funcs)
	pkg.Types = b.types(dpkg.Types)
	pkg.Vars = b.values(dpkg.Vars)
	pkg.Notes = b.notes(dpkg.Notes)

	pkg.Imports = bpkg.Imports
	pkg.TestImports = bpkg.TestImports
	pkg.XTestImports = bpkg.XTestImports

	return pkg, nil
}

// Build generates documentation from given source files through 'WalkType'.
func (w *Walker) Build(wr *WalkRes) (*Package, error) {
	ctxt := build.Context{
		CgoEnabled:  true,
		ReleaseTags: build.Default.ReleaseTags,
		BuildTags:   build.Default.BuildTags,
		Compiler:    "gc",
	}

	if w.Pdoc.PkgDecl == nil {
		w.Pdoc.PkgDecl = &PkgDecl{}
	}

	// Check 'WalkType'.
	switch wr.WalkType {
	case WT_Local:
		// Check root path.
		if len(wr.RootPath) == 0 {
			return nil, errors.New("WT_Local: empty root path")
		} else if !com.IsDir(wr.RootPath) {
			return nil, errors.New("WT_Local: cannot find specific directory or it's a file")
		}

		w.setLocalContext(&ctxt)
		return nil, errors.New("Hasn't supported yet!")
	case WT_Memory:
		// Convert source files.
		w.SrcFiles = make(map[string]*Source)
		w.Pdoc.Readme = make(map[string][]byte)
		for _, src := range wr.Srcs {
			srcName := strings.ToLower(src.Name()) // For readme comparation.
			switch {
			case strings.HasSuffix(src.Name(), ".go"):
				w.SrcFiles[src.Name()] = src
			case len(w.Pdoc.Tag) > 0 || (wr.WalkMode&WM_NoReadme != 0):
				// This means we are not on the latest version of the code,
				// so we do not collect the README files.
				continue
			case strings.HasPrefix(srcName, "readme_zh") || strings.HasPrefix(srcName, "readme_cn"):
				w.Pdoc.Readme["zh"] = src.Data()
			case strings.HasPrefix(srcName, "readme"):
				w.Pdoc.Readme["en"] = src.Data()
			}
		}

		// Check source files.
		if w.SrcFiles == nil {
			return nil, errors.New("WT_Memory: no Go source file")
		}

		w.setMemoryContext(&ctxt)

	default:
		return nil, errors.New("Hasn't supported yet!")
	}

	var err error
	var bpkg *build.Package

	for _, env := range goEnvs {
		ctxt.GOOS = env.GOOS
		ctxt.GOARCH = env.GOARCH

		bpkg, err = ctxt.ImportDir(w.Pdoc.ImportPath, 0)
		// Continue if there are no Go source files; we still want the directory info.
		_, nogo := err.(*build.NoGoError)
		if err != nil {
			if nogo {
				err = nil
			} else {
				return nil, errors.New("hv.Walker.Build -> ImportDir: " + err.Error())
			}
		}
	}

	w.Pdoc.IsCmd = bpkg.IsCommand()
	w.Pdoc.Synopsis = synopsis(bpkg.Doc)

	w.Pdoc.Imports = bpkg.Imports
	w.Pdoc.IsCgo = w.isCgo()
	w.Pdoc.TestImports = bpkg.TestImports

	// Check depth.
	if wr.WalkDepth <= WD_Imports {
		return w.Pdoc, nil
	}

	w.Fset = token.NewFileSet()
	// Parse the Go files
	files := make(map[string]*ast.File)
	for _, name := range append(bpkg.GoFiles, bpkg.CgoFiles...) {
		file, err := parser.ParseFile(w.Fset, name, w.SrcFiles[name].Data(), parser.ParseComments)
		if err != nil {
			return nil, errors.New("hv.Walker.Build -> parse Go files: " + err.Error())
			continue
		}
		w.Pdoc.Files = append(w.Pdoc.Files, w.SrcFiles[name])
		w.Pdoc.SourceSize += int64(len(w.SrcFiles[name].Data()))
		files[name] = file
	}
//.........这里部分代码省略.........

func buildPackage(pkg *build.Package, output string) error {
	args := []string{"-c", "-triple", triple}
	dir, file := path.Split(pkg.ImportPath)
	if pkg.IsCommand() || test {
		if output == "" {
			output = file
		}
	} else {
		dir = filepath.Join(pkgroot, dir)
		err := os.MkdirAll(dir, os.FileMode(0755))
		if err != nil {
			return err
		}
		if output == "" {
			output = path.Join(dir, file+".bc")
		}
	}
	if !pkg.IsCommand() || test {
		args = append(args, "-importpath", pkg.ImportPath)
	}

	var cgoCFLAGS, cgoCPPFLAGS, cgoLDFLAGS []string
	if len(pkg.CFiles) > 0 || len(pkg.CgoFiles) > 0 {
		// TODO(axw) process pkg-config
		cgoCFLAGS = append(envFields("CGO_CFLAGS"), pkg.CgoCFLAGS...)
		cgoCPPFLAGS = append(envFields("CGO_CPPFLAGS"), pkg.CgoCPPFLAGS...)
		//cgoCXXFLAGS = append(envFields("CGO_CXXFLAGS"), pkg.CgoCXXFLAGS...)
		cgoCPPFLAGS = append(cgoCPPFLAGS, "-I", workdir, "-I", pkg.Dir)
		cgoLDFLAGS = append(envFields("CGO_LDFLAGS"), pkg.CgoLDFLAGS...)
		// Get the library dir in which to find libgcc, libstdc++, etc.
		// We need to do this because we rely on clang to link; in Ubuntu 14.04
		// beta 1, there is no g++-4.9, but there is gccgo-4.9. Clang sees the
		// partial 4.9 lib directory and uses it instead of 4.8, which is what
		// should be used.
		if gcclib, err := findGcclib(); err != nil {
			return fmt.Errorf("failed to locate gcc lib dir: %v", err)
		} else if gcclib != "." {
			cgoLDFLAGS = append(cgoLDFLAGS, "-L", gcclib)
		}
	}
	var gofiles, cfiles []string
	if len(pkg.CgoFiles) > 0 {
		var err error
		gofiles, cfiles, err = runCgo(pkg.ImportPath, pkg.CgoFiles, cgoCPPFLAGS, cgoCFLAGS)
		if err != nil {
			return err
		}
	}

	gofiles = append(gofiles, pkg.GoFiles...)
	cfiles = append(cfiles, pkg.CFiles...)

	_, file = path.Split(output)
	tempfile := path.Join(workdir, file+".bc")
	args = append(args, fmt.Sprintf("-g=%v", generateDebug))
	args = append(args, "-o", tempfile)
	args = append(args, gofiles...)
	if test {
		args = append(args, pkg.TestGoFiles...)
	}
	cmd := exec.Command(llgobin, args...)
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	if err := runCmd(cmd); err != nil {
		return err
	}

	// Remove the .S files and add them to cfiles.
	for i := 0; i < len(pkg.SFiles); i++ {
		sfile := pkg.SFiles[i]
		if strings.HasSuffix(sfile, ".S") {
			cfiles = append(cfiles, sfile)
			pkg.SFiles = append(pkg.SFiles[:i], pkg.SFiles[i+1:]...)
			i--
		}
	}

	// Compile and link .c files in.
	llvmlink := filepath.Join(llvmbindir, "llvm-link")
	for _, cfile := range cfiles {
		bcfile := filepath.Join(workdir, filepath.Base(cfile+".bc"))
		args = []string{"-c", "-o", bcfile}
		if triple != "pnacl" {
			args = append(args, "-target", triple, "-emit-llvm")
		}
		args = append(args, cgoCFLAGS...)
		args = append(args, cgoCPPFLAGS...)
		args = append(args, cfile)
		cmd := exec.Command(clang, args...)
		cmd.Stdout = os.Stdout
		cmd.Stderr = os.Stderr
		err := runCmd(cmd)
		if err != nil {
			os.Remove(bcfile)
			return err
		}
		cmd = exec.Command(llvmlink, "-o", tempfile, tempfile, bcfile)
		cmd.Stdout = os.Stdout
		cmd.Stderr = os.Stderr
		err = runCmd(cmd)
//.........这里部分代码省略.........

func buildPackage(pkg *build.Package, output string) error {
	args := []string{"-c", "-triple", triple}
	dir, file := path.Split(pkg.ImportPath)
	if pkg.IsCommand() || test {
		if output == "" {
			output = file
		}
	} else {
		dir = filepath.Join(pkgroot, dir)
		err := os.MkdirAll(dir, os.FileMode(0755))
		if err != nil {
			return err
		}
		if output == "" {
			output = path.Join(dir, file+".bc")
		}
	}
	if !pkg.IsCommand() || test {
		args = append(args, "-importpath", pkg.ImportPath)
	}

	_, file = path.Split(output)
	tempfile := path.Join(workdir, file+".bc")
	args = append(args, fmt.Sprintf("-g=%v", generateDebug))
	args = append(args, "-o", tempfile)
	args = append(args, pkg.GoFiles...)
	if test {
		args = append(args, pkg.TestGoFiles...)
	}
	cmd := exec.Command("llgo", args...)
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	err := runCmd(cmd)
	if err != nil {
		return err
	}

	var cgoCFLAGS []string
	if len(pkg.CFiles) > 0 {
		cgoCFLAGS = strings.Fields(os.Getenv("CGO_CFLAGS"))
	}

	// Compile and link .c files in.
	llvmlink := filepath.Join(llvmbindir, "llvm-link")
	for _, cfile := range pkg.CFiles {
		bcfile := filepath.Join(workdir, filepath.Base(cfile+".bc"))
		args = []string{"-c", "-o", bcfile}
		if triple != "pnacl" {
			args = append(args, "-target", triple, "-emit-llvm")
		}
		args = append(args, cgoCFLAGS...)
		args = append(args, cfile)
		cmd := exec.Command(clang, args...)
		cmd.Stdout = os.Stdout
		cmd.Stderr = os.Stderr
		err = runCmd(cmd)
		if err != nil {
			os.Remove(bcfile)
			return err
		}
		cmd = exec.Command(llvmlink, "-o", tempfile, tempfile, bcfile)
		cmd.Stdout = os.Stdout
		cmd.Stderr = os.Stderr
		err = runCmd(cmd)
		os.Remove(bcfile)
		if err != nil {
			return err
		}
	}

	// Link .ll files in.
	if len(pkg.SFiles) > 0 {
		args = []string{"-o", tempfile, tempfile}
		args = append(args, pkg.SFiles...)
		cmd := exec.Command(llvmlink, args...)
		cmd.Stdout = os.Stdout
		cmd.Stderr = os.Stderr
		err = runCmd(cmd)
		if err != nil {
			return err
		}
	}

	// If it's a command, link in the dependencies.
	if pkg.IsCommand() {
		err = linkdeps(pkg, tempfile)
		if err != nil {
			return err
		}
	} else if test {
		if err = linktest(pkg, tempfile); err != nil {
			return err
		}
	}
	return moveFile(tempfile, output)
}