Fix linter issues

Signed-off-by: Praveen Rewar <8457124+praveenrewar@users.noreply.github.com>

.golangci.yml

@@ -14,6 +14,11 @@ linters-settings:
       regexp:
         copyright-year: 20[0-9][0-9]
     template-path: code-header-template.txt
+  revive:
+    enable-all: true
+    rules:
+    - name: dot-imports
+      disabled: true
 issues:
   max-issues-per-linter: 0
   max-same-issues: 0 

pkg/vendir/directory/staging_dir.go

@@ -77,7 +77,7 @@ func (d StagingDir) CopyExistingFiles(rootDir string, stagingPath string, ignore
 
 	// Consider WalkDir in the future for efficiency (Go 1.16)
 	// Walk root path above to determine files that can be ignored
-	err := filepath.Walk(rootPath, func(path string, info os.FileInfo, err error) error {
+	err := filepath.Walk(rootPath, func(path string, _ os.FileInfo, err error) error {
 		if err != nil {
 			return err
 		}

pkg/vendir/directory/symlink.go

@@ -18,7 +18,7 @@ func ValidateSymlinks(path string) error {
 		return err
 	}
 	rootSegments := strings.Split(absRoot, string(os.PathSeparator))
-	return filepath.WalkDir(path, func(path string, info fs.DirEntry, err error) error {
+	return filepath.WalkDir(path, func(path string, info fs.DirEntry, _ error) error {
 		if info.Type()&os.ModeSymlink == os.ModeSymlink {
 			resolvedPath, err := filepath.EvalSymlinks(path)
 			if err != nil {

test/e2e/concurrent_processes_test.go

@@ -39,7 +39,7 @@ directories:
 		wg := sync.WaitGroup{}
 		for i := 0; i < processes; i++ {
 			wg.Add(1)
-			go func(n int, t *testing.T, wg *sync.WaitGroup) {
+			go func(n int, _ *testing.T, wg *sync.WaitGroup) {
 				defer wg.Done()
 				// RunWithOpts invokes t.Fatal on error
 				vendir.RunWithOpts(