Golang Context.GOARCH方法代码示例

func (b *builder) build(srcs []*source) (*Package, error) {

	b.pdoc.Updated = time.Now().UTC()

	references := make(map[string]bool)
	b.srcs = make(map[string]*source)
	for _, src := range srcs {
		if strings.HasSuffix(src.name, ".go") {
			b.srcs[src.name] = src
		} else {
			addReferences(references, src.data)

			fn := strings.ToLower(src.name)
			if fn == "readme" || strings.HasPrefix(fn, "readme.") {
				if b.pdoc.ReadmeFiles == nil {
					b.pdoc.ReadmeFiles = make(map[string][]byte)
				}

				b.pdoc.ReadmeFiles[src.name] = src.data
			}
		}
	}

	for r := range references {
		b.pdoc.References = append(b.pdoc.References, r)
	}

	if len(b.srcs) == 0 {
		return b.pdoc, nil
	}

	b.fset = token.NewFileSet()

	// Find the package and associated files.

	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
		}
//.........这里部分代码省略.........

// 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 newPackage(dir *gosrc.Directory) (*Package, error) {

	pkg := &Package{
		Updated:        time.Now().UTC(),
		LineFmt:        dir.LineFmt,
		ImportPath:     dir.ImportPath,
		ProjectRoot:    dir.ProjectRoot,
		ProjectName:    dir.ProjectName,
		ProjectURL:     dir.ProjectURL,
		BrowseURL:      dir.BrowseURL,
		Etag:           PackageVersion + "-" + dir.Etag,
		VCS:            dir.VCS,
		DeadEndFork:    dir.DeadEndFork,
		Subdirectories: dir.Subdirectories,
	}

	var b builder
	b.srcs = make(map[string]*source)
	references := make(map[string]bool)
	for _, file := range dir.Files {
		if strings.HasSuffix(file.Name, ".go") {
			gosrc.OverwriteLineComments(file.Data)
			b.srcs[file.Name] = &source{name: file.Name, browseURL: file.BrowseURL, data: file.Data}
		} else {
			addReferences(references, file.Data)
		}
	}

	for r := range references {
		pkg.References = append(pkg.References, r)
	}

	if len(b.srcs) == 0 {
		return pkg, nil
	}

	b.fset = token.NewFileSet()

	// Find the package and associated files.

	ctxt := build.Context{
		GOOS:        "linux",
		GOARCH:      "amd64",
		CgoEnabled:  true,
		ReleaseTags: build.Default.ReleaseTags,
		BuildTags:   build.Default.BuildTags,
		Compiler:    "gc",
	}

	var err error
	var bpkg *build.Package

	for _, env := range goEnvs {
		ctxt.GOOS = env.GOOS
		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)
//.........这里部分代码省略.........

func getPackage(pkgpath string) (*gobuild.Package, error) {
	var ctx gobuild.Context = gobuild.Default
	ctx.GOARCH = GOARCH
	ctx.GOOS = GOOS
	ctx.BuildTags = append(ctx.BuildTags[:], "llgo")
	//ctx.Compiler = "llgo"

	// Attempt to find an overlay package path,
	// which we'll use in ReadDir below.
	overlayentries := make(map[string]bool)
	overlaypkgpath := llgoPkgPrefix + pkgpath
	overlaypkg, err := ctx.Import(overlaypkgpath, "", gobuild.FindOnly)
	if err != nil {
		overlaypkg = nil
	}

	// ReadDir is overridden to return a fake ".s"
	// file for each ".ll" file in the directory.
	ctx.ReadDir = func(dir string) (fi []os.FileInfo, err error) {
		fi, err = ioutil.ReadDir(dir)
		if err != nil {
			return nil, err
		}
		entries := make(map[string]os.FileInfo)
		for _, info := range fi {
			entries[info.Name()] = info
		}
		// Overlay all files in the overlay package dir.
		// If we find any .ll files, replace the suffix
		// with .s.
		if overlaypkg != nil {
			fi, err = ioutil.ReadDir(overlaypkg.Dir)
		}
		if err == nil {
			// Check for .ll files in the overlay dir if
			// we have one, else in the standard package dir.
			for _, info := range fi {
				name := info.Name()
				if strings.HasSuffix(name, ".ll") {
					name = name[:len(name)-3] + ".s"
					info = &renamedFileInfo{info, name}
				}
				overlayentries[name] = true
				entries[name] = info
			}
		}
		fi = make([]os.FileInfo, 0, len(entries))
		for _, info := range entries {
			fi = append(fi, info)
		}
		return fi, nil
	}

	// OpenFile is overridden to return the contents
	// of the ".ll" file found in ReadDir above. The
	// returned ReadCloser is wrapped to transform
	// LLVM IR comments to use "//", as expected by
	// go/build when looking for build tags.
	ctx.OpenFile = func(path string) (io.ReadCloser, error) {
		base := filepath.Base(path)
		overlay := overlayentries[base]
		if overlay {
			if overlaypkg != nil {
				path = filepath.Join(overlaypkg.Dir, base)
			}
			if strings.HasSuffix(path, ".s") {
				path := path[:len(path)-2] + ".ll"
				var r io.ReadCloser
				var err error
				r, err = os.Open(path)
				if err == nil {
					r = build.NewLLVMIRReader(r)
				}
				return r, err
			}
		}
		return os.Open(path)
	}

	pkg, err := ctx.Import(pkgpath, "", 0)
	if err != nil {
		return nil, err
	} else {
		if overlaypkg == nil {
			overlaypkg = pkg
		}
		for i, filename := range pkg.GoFiles {
			pkgdir := pkg.Dir
			if overlayentries[filename] {
				pkgdir = overlaypkg.Dir
			}
			pkg.GoFiles[i] = path.Join(pkgdir, filename)
		}
		for i, filename := range pkg.CFiles {
			pkgdir := pkg.Dir
			if overlayentries[filename] {
				pkgdir = overlaypkg.Dir
			}
			pkg.CFiles[i] = path.Join(pkgdir, filename)
		}
//.........这里部分代码省略.........