Fix #6813: Allow git.GetTree to take both commit and tree names (#6816)

* Allow git.GetTree to take both commit and tree names, return full paths on entries listed through Tree.ListEntriesRecursive

Signed-off-by: Filip Navara <filip.navara@gmail.com>

* Fix the SHA returned on Git Tree APIs called with commit hash or symbolic name

Signed-off-by: Filip Navara <filip.navara@gmail.com>

modules/git/repo_tree.go

@@ -35,14 +35,15 @@ func (repo *Repository) GetTree(idStr string) (*Tree, error) {
 	if err != nil {
 		return nil, err
 	}
+	resolvedID := id
 	commitObject, err := repo.gogitRepo.CommitObject(plumbing.Hash(id))
+	if err == nil {
+		id = SHA1(commitObject.TreeHash)
+	}
+	treeObject, err := repo.getTree(id)
 	if err != nil {
 		return nil, err
 	}
-	treeObject, err := repo.getTree(SHA1(commitObject.TreeHash))
-	if err != nil {
-		return nil, err
-	}
-	treeObject.CommitID = id
+	treeObject.ResolvedID = resolvedID
 	return treeObject, nil
 }

modules/git/tree.go

@@ -16,7 +16,7 @@ import (
 // Tree represents a flat directory listing.
 type Tree struct {
 	ID         SHA1
-	CommitID SHA1
+	ResolvedID SHA1
 	repo       *Repository
 
 	gogitTree *object.Tree
@@ -106,7 +106,7 @@ func (t *Tree) ListEntriesRecursive() (Entries, error) {
 	seen := map[plumbing.Hash]bool{}
 	walker := object.NewTreeWalker(t.gogitTree, true, seen)
 	for {
-		_, entry, err := walker.Next()
+		fullName, entry, err := walker.Next()
 		if err == io.EOF {
 			break
 		}
@@ -121,6 +121,7 @@ func (t *Tree) ListEntriesRecursive() (Entries, error) {
 			ID:             entry.Hash,
 			gogitTreeEntry: &entry,
 			ptree:          t,
+			fullName:       fullName,
 		}
 		entries = append(entries, convertedEntry)
 	}

modules/git/tree_entry.go

@@ -42,10 +42,14 @@ type TreeEntry struct {
 
 	size     int64
 	sized    bool
+	fullName string
 }
 
 // Name returns the name of the entry
 func (te *TreeEntry) Name() string {
+	if te.fullName != "" {
+		return te.fullName
+	}
 	return te.gogitTreeEntry.Name
 }
 

modules/repofiles/tree.go

@@ -23,7 +23,7 @@ func GetTreeBySHA(repo *models.Repository, sha string, page, perPage int, recurs
 		}
 	}
 	tree := new(api.GitTreeResponse)
-	tree.SHA = gitTree.CommitID.String()
+	tree.SHA = gitTree.ResolvedID.String()
 	tree.URL = repo.APIURL() + "/git/trees/" + tree.SHA
 	var entries git.Entries
 	if recursive {