Go: Move IsGolangVendorDirectory to util package

Author: mbg

go/extractor/configurebaseline/configurebaseline.go

@@ -3,24 +3,12 @@ package configurebaseline
 import (
 	"encoding/json"
 	"io/fs"
-	"os"
 	"path"
 	"path/filepath"
 
 	"github.com/github/codeql-go/extractor/util"
 )
 
-func fileExists(path string) bool {
-	stat, err := os.Stat(path)
-	return err == nil && stat.Mode().IsRegular()
-}
-
-// Decides if `dirPath` is a vendor directory by testing whether it is called `vendor`
-// and contains a `modules.txt` file.
-func isGolangVendorDirectory(dirPath string) bool {
-	return filepath.Base(dirPath) == "vendor" && fileExists(filepath.Join(dirPath, "modules.txt"))
-}
-
 type BaselineConfig struct {
 	PathsIgnore []string `json:"paths-ignore"`
 }
@@ -38,7 +26,7 @@ func GetConfigBaselineAsJSON(rootDir string) ([]byte, error) {
 				// it will not be extracted either.
 				return nil
 			}
-			if isGolangVendorDirectory(dirPath) {
+			if util.IsGolangVendorDirectory(dirPath) {
 				// Note that CodeQL expects a forward-slash-separated path, even on Windows.
 				vendorDirs = append(vendorDirs, path.Join(filepath.ToSlash(dirPath), "**"))
 				return filepath.SkipDir

go/extractor/util/util.go

@@ -287,3 +287,15 @@ func getImportPathFromRepoURL(repourl string) string {
 	path = regexp.MustCompile(`^/+|\.git$`).ReplaceAllString(path, "")
 	return host + "/" + path
 }
+
+// Decides if `path` refers to a file that exists.
+func fileExists(path string) bool {
+	stat, err := os.Stat(path)
+	return err == nil && stat.Mode().IsRegular()
+}
+
+// Decides if `dirPath` is a vendor directory by testing whether it is called `vendor`
+// and contains a `modules.txt` file.
+func IsGolangVendorDirectory(dirPath string) bool {
+	return filepath.Base(dirPath) == "vendor" && fileExists(filepath.Join(dirPath, "modules.txt"))
+}