refactor file|path (#1409)

Co-authored-by: anqiansong <anqiansong@bytedance.com>

tools/goctl/util/pathx/path.go

@@ -0,0 +1,123 @@
+package pathx
+
+import (
+	"fmt"
+	"os"
+	"path"
+	"path/filepath"
+	"strings"
+
+	"github.com/tal-tech/go-zero/tools/goctl/vars"
+)
+
+const (
+	pkgSep           = "/"
+	goModeIdentifier = "go.mod"
+)
+
+// JoinPackages calls strings.Join and returns
+func JoinPackages(pkgs ...string) string {
+	return strings.Join(pkgs, pkgSep)
+}
+
+// MkdirIfNotExist makes directories if the input path is not exists
+func MkdirIfNotExist(dir string) error {
+	if len(dir) == 0 {
+		return nil
+	}
+
+	if _, err := os.Stat(dir); os.IsNotExist(err) {
+		return os.MkdirAll(dir, os.ModePerm)
+	}
+
+	return nil
+}
+
+// PathFromGoSrc returns the path without slash where has been trim the prefix $GOPATH
+func PathFromGoSrc() (string, error) {
+	dir, err := os.Getwd()
+	if err != nil {
+		return "", err
+	}
+
+	gopath := os.Getenv("GOPATH")
+	parent := path.Join(gopath, "src", vars.ProjectName)
+	pos := strings.Index(dir, parent)
+	if pos < 0 {
+		return "", fmt.Errorf("%s is not in GOPATH", dir)
+	}
+
+	// skip slash
+	return dir[len(parent)+1:], nil
+}
+
+// FindGoModPath returns the path in project where has file go.mod, it maybe return empty string if
+// there is no go.mod file in project
+func FindGoModPath(dir string) (string, bool) {
+	absDir, err := filepath.Abs(dir)
+	if err != nil {
+		return "", false
+	}
+
+	absDir = strings.ReplaceAll(absDir, `\`, `/`)
+	var rootPath string
+	tempPath := absDir
+	hasGoMod := false
+	for {
+		if FileExists(filepath.Join(tempPath, goModeIdentifier)) {
+			rootPath = strings.TrimPrefix(absDir[len(tempPath):], "/")
+			hasGoMod = true
+			break
+		}
+
+		if tempPath == filepath.Dir(tempPath) {
+			break
+		}
+
+		tempPath = filepath.Dir(tempPath)
+		if tempPath == string(filepath.Separator) {
+			break
+		}
+	}
+	if hasGoMod {
+		return rootPath, true
+	}
+	return "", false
+}
+
+// FindProjectPath returns the parent directory where has file go.mod in project
+func FindProjectPath(loc string) (string, bool) {
+	var dir string
+	if strings.IndexByte(loc, '/') == 0 {
+		dir = loc
+	} else {
+		wd, err := os.Getwd()
+		if err != nil {
+			return "", false
+		}
+
+		dir = filepath.Join(wd, loc)
+	}
+
+	for {
+		if FileExists(filepath.Join(dir, goModeIdentifier)) {
+			return dir, true
+		}
+
+		dir = filepath.Dir(dir)
+		if dir == "/" {
+			break
+		}
+	}
+
+	return "", false
+}
+
+func isLink(name string) (bool, error) {
+	fi, err := os.Lstat(name)
+	if err != nil {
+		return false, err
+	}
+
+	return fi.Mode()&os.ModeSymlink != 0, nil
+}