Golang log.Error函数代码示例

// downloadPackage downloads package either use version control tools or not.
func downloadPackage(ctx *cli.Context, nod *doc.Node) (*doc.Node, []string) {
	log.Message("Downloading", fmt.Sprintf("package: %[email protected]%s:%s",
		nod.ImportPath, nod.Type, doc.CheckNodeValue(nod.Value)))
	// Mark as donwloaded.
	downloadCache[nod.RootPath] = true

	// Check if only need to use VCS tools.
	var imports []string
	var err error
	gopathDir := path.Join(installGopath, nod.RootPath)
	vcs := getVcsName(gopathDir)
	if ctx.Bool("update") && ctx.Bool("gopath") && len(vcs) > 0 {
		err = updateByVcs(vcs, gopathDir)
		imports = doc.GetAllImports([]string{gopathDir}, nod.RootPath, false)
	} else {
		// If package has revision and exist, then just check dependencies.
		if nod.IsGetDepsOnly {
			return nod, doc.GetAllImports([]string{path.Join(installRepoPath, nod.RootPath) + versionSuffix(nod.Value)},
				nod.RootPath, ctx.Bool("example"))
		}
		nod.Revision = doc.LocalNodes.MustValue(nod.RootPath, "value")
		imports, err = doc.PureDownload(nod, installRepoPath, ctx) //CmdGet.Flags)
	}

	if err != nil {
		log.Error("get", "Fail to download pakage: "+nod.ImportPath)
		log.Error("", "\t"+err.Error())
		failConut++
		os.RemoveAll(installRepoPath + "/" + nod.RootPath)
		return nil, nil
	}
	return nod, imports
}

func init() {
	hd, err := com.HomeDir()
	if err != nil {
		log.Error("", "Fail to get current user")
		log.Fatal("", err.Error())
	}

	HomeDir = strings.Replace(RawHomeDir, "~", hd, -1)

	cfgPath := path.Join(HomeDir, GOPM_CONFIG_FILE)
	if !com.IsExist(cfgPath) {
		os.MkdirAll(path.Dir(cfgPath), os.ModePerm)
		if _, err = os.Create(cfgPath); err != nil {
			log.Error("", "Fail to create gopm config file")
			log.Fatal("", err.Error())
		}
	}
	Cfg, err = goconfig.LoadConfigFile(cfgPath)
	if err != nil {
		log.Error("", "Fail to load gopm config file")
		log.Fatal("", err.Error())
	}

	LoadLocalNodes()
	LoadPkgNameList(path.Join(HomeDir, PKG_NAME_LIST_PATH))
}

// scan a directory and gen a gopm file
func runGen(ctx *cli.Context) {
	setup(ctx)

	if !com.IsExist(".gopmfile") {
		os.Create(".gopmfile")
	}

	gf, err := goconfig.LoadConfigFile(".gopmfile")
	if err != nil {
		log.Error("gen", "Cannot load gopmfile:")
		log.Fatal("", "\t"+err.Error())
	}

	// Get dependencies.
	imports := doc.GetAllImports([]string{workDir},
		parseTarget(gf.MustValue("target", "path")), ctx.Bool("example"))

	for _, p := range imports {
		p = doc.GetProjectPath(p)
		if strings.HasSuffix(workDir, p) {
			continue
		}
		if value := gf.MustValue("deps", p); len(value) == 0 {
			gf.SetValue("deps", p, "")
		}
	}

	err = goconfig.SaveConfigFile(gf, ".gopmfile")
	if err != nil {
		log.Error("gen", "Fail to save gopmfile:")
		log.Fatal("", "\t"+err.Error())
	}

	log.Success("SUCC", "gen", "Generate gopmfile successfully!")
}

// validPath checks if the information of the package is valid.
func validPath(info string) (string, string) {
	infos := strings.Split(info, ":")

	l := len(infos)
	switch {
	case l == 1:
		// for local imports
		if com.IsFile(infos[0]) {
			return doc.LOCAL, infos[0]
		}

		return doc.BRANCH, ""
	case l == 2:
		switch infos[1] {
		case doc.TRUNK, doc.MASTER, doc.DEFAULT:
			infos[1] = ""
		}
		return infos[0], infos[1]
	default:
		log.Error("", "Cannot parse dependency version:")
		log.Error("", "\t"+info)
		log.Help("Try 'gopm help get' to get more information")
		return "", ""
	}
}

func SaveLocalNodes() {
	if err := goconfig.SaveConfigFile(LocalNodes,
		path.Join(HomeDir+LocalNodesFile)); err != nil {
		log.Error("", "Fail to save localnodes.list:")
		log.Error("", "\t"+err.Error())
	}
}

func LoadPkgNameList(filePath string) {
	PackageNameList = make(map[string]string)

	// If file does not exist, simply ignore.
	if !com.IsFile(filePath) {
		return
	}

	data, err := ioutil.ReadFile(filePath)
	if err != nil {
		log.Error("Package name list", "Fail to read file")
		log.Fatal("", err.Error())
	}

	pkgs := strings.Split(string(data), "\n")
	for i, line := range pkgs {
		infos := strings.Split(line, "=")
		if len(infos) != 2 {
			// Last item might be empty line.
			if i == len(pkgs)-1 {
				continue
			}
			log.Error("", "Fail to parse package name: "+line)
			log.Fatal("", "Invalid package name information")
		}
		PackageNameList[strings.TrimSpace(infos[0])] =
			strings.TrimSpace(infos[1])
	}
}

func buildBinary(ctx *cli.Context, args ...string) {
	genNewGoPath(ctx, false)

	log.Trace("Building...")

	cmdArgs := []string{"go", "build"}
	cmdArgs = append(cmdArgs, args...)
	err := execCmd(newGoPath, newCurPath, cmdArgs...)
	if err != nil {
		log.Error("build", "fail to build program:")
		log.Fatal("", "\t"+err.Error())
	}

	if isWindowsXP {
		fName := path.Base(pkgName)
		binName := fName + ".exe"
		os.Remove(binName)
		exePath := filepath.Join(curPath, doc.VENDOR, "src", pkgName, binName)
		if com.IsFile(exePath) {
			err = os.Rename(exePath, filepath.Join(curPath, binName))
			if err != nil {
				log.Error("build", "fail to move binary:")
				log.Fatal("", "\t"+err.Error())
			}
		} else {
			log.Warn("No binary generated")
		}
	}
}

func GetPkgFullPath(short string) string {
	name, ok := PackageNameList[short]
	if !ok {
		log.Error("", "Invalid package name")
		log.Error("", "It's not a invalid import path and no match in the package name list:")
		log.Fatal("", "\t"+short)
	}
	return name
}

func execCmd(gopath, curPath string, args ...string) error {
	cwd, err := os.Getwd()
	if err != nil {
		log.Error("", "Fail to get work directory:")
		log.Fatal("", "\t"+err.Error())
	}

	log.Log("Changing work directory to %s", curPath)
	err = os.Chdir(curPath)
	if err != nil {
		log.Error("", "Fail to change work directory:")
		log.Fatal("", "\t"+err.Error())
	}
	defer func() {
		log.Log("Changing work directory back to %s", cwd)
		os.Chdir(cwd)
	}()

	err = os.Chdir(curPath)
	if err != nil {
		log.Error("", "Fail to change work directory:")
		log.Fatal("", "\t"+err.Error())
	}

	oldGoPath = os.Getenv("GOPATH")
	log.Log("Setting GOPATH to %s", gopath)

	sep := ":"
	if runtime.GOOS == "windows" {
		sep = ";"
	}
	err = os.Setenv("GOPATH", gopath+sep+oldGoPath)
	if err != nil {
		log.Error("", "Fail to setting GOPATH:")
		log.Fatal("", "\t"+err.Error())
	}
	defer func() {
		log.Log("Setting GOPATH back to %s", oldGoPath)
		os.Setenv("GOPATH", oldGoPath)
	}()

	cmd := exec.Command(args[0], args[1:]...)
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr

	log.Log("===== application outputs start =====\n")

	err = cmd.Run()

	log.Log("====== application outputs end ======")
	return err
}

func exePath() string {
	file, err := exec.LookPath(os.Args[0])
	if err != nil {
		log.Error("Update", "Fail to execute exec.LookPath")
		log.Fatal("", err.Error())
	}
	path, err := filepath.Abs(file)
	if err != nil {
		log.Error("Update", "Fail to get absolutely path")
		log.Fatal("", err.Error())
	}
	return path
}

// CheckIsExistWithVCS returns false if directory only has VCS folder,
// or doesn't exist.
func CheckIsExistWithVCS(path string) bool {
	// Check if directory exist.
	if !com.IsExist(path) {
		return false
	}

	// Check if only has VCS folder.
	dirs, err := GetDirsInfo(path)
	if err != nil {
		log.Error("", "Fail to get directory's information")
		log.Fatal("", err.Error())
	}

	if len(dirs) > 1 {
		return true
	} else if len(dirs) == 0 {
		return false
	}

	switch dirs[0].Name() {
	case ".git", ".hg", ".svn":
		return false
	}

	return true
}

func runRun(ctx *cli.Context) {
	setup(ctx)

	// Get GOPATH.
	installGopath = com.GetGOPATHs()[0]
	if com.IsDir(installGopath) {
		isHasGopath = true
		log.Log("Indicated GOPATH: %s", installGopath)
		installGopath += "/src"
	}

	genNewGoPath(ctx, false)

	log.Trace("Running...")

	cmdArgs := []string{"go", "run"}
	cmdArgs = append(cmdArgs, ctx.Args()...)
	err := execCmd(newGoPath, newCurPath, cmdArgs...)
	if err != nil {
		log.Error("run", "Fail to run program:")
		log.Fatal("", "\t"+err.Error())
	}

	log.Success("SUCC", "run", "Command executed successfully!")
}

// GetDirsInfo returns os.FileInfo of all sub-directories in root path.
func GetDirsInfo(rootPath string) []os.FileInfo {
	rootDir, err := os.Open(rootPath)
	if err != nil {
		log.Error("", "Fail to open directory")
		log.Fatal("", err.Error())
	}
	defer rootDir.Close()

	dirs, err := rootDir.Readdir(0)
	if err != nil {
		log.Error("", "Fail to read directory")
		log.Fatal("", err.Error())
	}

	return dirs
}

// GetImports returns package denpendencies.
func GetImports(absPath, importPath string, example bool) []string {
	pkg, err := build.ImportDir(absPath, build.AllowBinary)
	if err != nil {
		if _, ok := err.(*build.NoGoError); !ok {
			log.Error("", "Fail to get imports")
			log.Fatal("", err.Error())
		}
	}

	fis := GetDirsInfo(absPath)
	absPath += "/"

	dirs := make([]string, 0)
	for _, fi := range fis {
		if fi.IsDir() && !strings.Contains(fi.Name(), VENDOR) {
			dirs = append(dirs, absPath+fi.Name())
		}
	}

	imports := make([]string, 0, len(pkg.Imports))
	for _, p := range pkg.Imports {
		if !IsGoRepoPath(p) && !strings.HasPrefix(p, importPath) {
			imports = append(imports, p)
		}
	}
	if len(dirs) > 0 {
		imports = append(imports, GetAllImports(dirs, importPath, example)...)
	}
	return imports
}

func copyToGopath(srcPath, destPath string) {
	os.RemoveAll(destPath)
	err := com.CopyDir(srcPath, destPath)
	if err != nil {
		log.Error("download", "Fail to copy to GOPATH:")
		log.Fatal("", "\t"+err.Error())
	}
}