How to use findModuleRoot method of generators Package

...154		"File containing boilerplate header text. The string YEAR will be replaced with the current 4-digit year.")155	cmd.Flags().BoolVar(&install, "install-generators", true, "Go get the generators")156	var defaultModule string157	cwd, _ := os.Getwd()158	if modRoot := findModuleRoot(cwd); modRoot != "" {159		if b, err := ioutil.ReadFile(filepath.Clean(path.Join(modRoot, "go.mod"))); err == nil {160			defaultModule = modfile.ModulePath(b)161		}162	}163	cmd.Flags().StringVar(&module, "module", defaultModule, "Go module of the apiserver.")164	// calculate the versions165	var defaultVersions []string166	if files, err := ioutil.ReadDir(filepath.Join("pkg", "apis")); err == nil {167		for _, f := range files {168			if f.IsDir() {169				versionFiles, err := ioutil.ReadDir(filepath.Join("pkg", "apis", f.Name()))170				if err != nil {171					log.Fatal(err)172				}173				for _, v := range versionFiles {174					if v.IsDir() {175						match := versionRegexp.MatchString(v.Name())176						if !match {177							continue178						}179						defaultVersions = append(defaultVersions, path.Join(module, "pkg", "apis", f.Name(), v.Name()))180					}181				}182			}183		}184	} else {185		fmt.Fprintf(os.Stderr, "cannot parse api versions: %v\n", err)186	}187	cmd.Flags().StringSliceVar(188		&versions, "versions", defaultVersions, "Go packages of API versions to generate code for.")189	if err := cmd.Execute(); err != nil {190		log.Fatal(err)191	}192}193var versionRegexp = regexp.MustCompile("^v[0-9]+((alpha|beta)?[0-9]+)?$")194func run(cmd *exec.Cmd) error {195	fmt.Println(strings.Join(cmd.Args, " "))196	cmd.Stdout = os.Stdout197	cmd.Stderr = os.Stderr198	cmd.Stdin = os.Stdin199	return cmd.Run()200}201func getCmd(cmd string, args ...string) *exec.Cmd {202	// nolint:gosec203	e := exec.Command(filepath.Join(bin, cmd), "--output-base", output, "--go-header-file", header)204	e.Args = append(e.Args, args...)205	return e206}207func findModuleRoot(dir string) string {208	for {209		if _, err := os.Stat(filepath.Join(dir, "go.mod")); err == nil {210			return dir211		}212		parentDIR := path.Dir(dir)213		if parentDIR == dir {214			break215		}216		dir = parentDIR217	}218	return ""219}220func findInputBase(module string, versions []string) (string, []string, bool) {221	if allHasPrefix(filepath.Join(module, "api"), versions) {...

...163		return string(line)164	}165	return "" // missing module path166}167func findModuleRoot(dir string) (root string) {168	dir = filepath.Clean(dir)169	// Look for enclosing go.mod.170	for {171		if fi, err := os.Stat(filepath.Join(dir, "go.mod")); err == nil && !fi.IsDir() {172			return dir173		}174		d := filepath.Dir(dir)175		if d == dir {176			break177		}178		dir = d179	}180	return ""181}182func getPackageImportPath() string {183	workingDir, err := os.Getwd()184	if err != nil {185		panic(err.Error())186	}187	sep := string(filepath.Separator)188	// Try go.mod file first189	modRoot := findModuleRoot(workingDir)190	if modRoot != "" {191		modName := moduleName(modRoot)192		if modName != "" {193			cd := strings.ReplaceAll(workingDir, modRoot, "")194			cd = strings.ReplaceAll(cd, sep, "/")195			return modName + cd196		}197	}198	// Fallback to GOPATH structure199	paths := strings.Split(workingDir, sep+"src"+sep)200	if len(paths) == 1 {201		fmt.Printf("\nCouldn't identify package import path.\n\n\tginkgo generate\n\nMust be run within a package directory under $GOPATH/src/...\nYou're going to have to change UNKNOWN_PACKAGE_PATH in the generated file...\n\n")202		return "UNKNOWN_PACKAGE_PATH"203	}...

1import (2func main() {3    fmt.Println(generators.FindModuleRoot())4}5Recommended Posts: Go - ioutil.TempDir() function6Go - ioutil.TempFile() function7Go - ioutil.ReadFile() function8Go - ioutil.WriteFile() function9Go - ioutil.NopCloser() function10Go - ioutil.ReadAll() function11Go - ioutil.Discard() function12Go - ioutil.ReadDir() funct

1import (2func main() {3	g := genny.New()4	g.RunFn(func(r *genny.Runner) error {5		root, err := genny.FindModuleRoot()6		if err != nil {7		}8		fmt.Println(root)9	})10}11import (12func main() {13	g := genny.New()14	g.RunFn(func(r *genny.Runner) error {15		root, err := genny.FindModuleRoot()16		if err != nil {17		}18		fmt.Println(root)19		fmt.Println(filepath.Join(root, "test.txt"))20	})21}