short form for override and fix versioned override

pkg/runner/local_repository_cache.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"io"
 	"io/fs"
+	goURL "net/url"
 	"os"
 	"path/filepath"
 	"strings"
@@ -22,14 +23,21 @@ type LocalRepositoryCache struct {
 
 func (l *LocalRepositoryCache) Fetch(ctx context.Context, cacheDir, url, ref, token string) (string, error) {
 	if dest, ok := l.LocalRepositories[fmt.Sprintf("%s@%s", url, ref)]; ok {
-		l.CacheDirCache[cacheDir] = dest
-		return "local-repository", nil
+		l.CacheDirCache[fmt.Sprintf("%s@%s", cacheDir, ref)] = dest
+		return ref, nil
+	}
+	if purl, err := goURL.Parse(url); err == nil {
+		if dest, ok := l.LocalRepositories[fmt.Sprintf("%s@%s", strings.TrimPrefix(purl.Path, "/"), ref)]; ok {
+			l.CacheDirCache[fmt.Sprintf("%s@%s", cacheDir, ref)] = dest
+			return ref, nil
+		}
 	}
 	return l.Parent.Fetch(ctx, cacheDir, url, ref, token)
 }
 
 func (l *LocalRepositoryCache) GetTarArchive(ctx context.Context, cacheDir, sha, includePrefix string) (io.ReadCloser, error) {
-	if dest, ok := l.CacheDirCache[cacheDir]; ok {
+	// sha is mapped to ref in fetch if there is a local override
+	if dest, ok := l.CacheDirCache[fmt.Sprintf("%s@%s", cacheDir, sha)]; ok {
 		srcPath := filepath.Join(dest, includePrefix)
 		buf := &bytes.Buffer{}
 		tw := tar.NewWriter(buf)

pkg/runner/testdata/local-remote-action-overrides/config.yml

@@ -1,2 +1,3 @@
 local-repositories:
-  https://github.com/nektos/test-override@a: testdata/actions/node20
+  https://github.com/nektos/test-override@a: testdata/actions/node20
+  nektos/test-override@b: testdata/actions/node16

pkg/runner/testdata/local-remote-action-overrides/push.yml

@@ -5,4 +5,5 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: nektos/test-override@a
+      - uses: nektos/test-override@a
+      - uses: nektos/test-override@b