feat(repo_blob): add CatFileBlob

repo_blob.go

@@ -0,0 +1,33 @@
+// Copyright 2022 The Gogs Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package git
+
+// CatFileBlob returns the blob corresponding to the given revision of the repository.
+func (repo *Repository) CatFileBlob(rev string) (*Blob, error) {
+rev, err := r.RevParse(rev, RevParseOptions{Timeout: opt.Timeout}) //nolint
+if err != nil {
+return nil, err
+}
+
+typ, err := repo.CatFileType(rev)
+if err != nil {
+return nil, err
+}
+
+if typ != ObjectBlob {
+return nil, ErrNotBlob
+}
+
+return &Blob{
+TreeEntry: &TreeEntry{
+mode: EntryBlob,
+typ: ObjectBlob,
+id: MustIDFromString(rev),
+parent: &Tree{
+repo: repo,
+},
+},
+}, nil
+}

repo_blob_test.go

@@ -0,0 +1,31 @@
+// Copyright 2022 The Gogs Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package git
+
+import (
+"testing"
+
+"github.com/stretchr/testify/assert"
+"github.com/stretchr/testify/require"
+)
+
+func TestRepository_CatFileBlob(t *testing.T) {
+t.Run("not a blob", func(t *testing.T) {
+_, err := testrepo.CatFileBlob("007cb92318c7bd3b56908ea8c2e54370245562f8")
+assert.Equal(t, ErrNotBlob, err)
+})
+
+t.Run("get a blob, no full rev hash", func(t *testing.T) {
+b, err := testrepo.CatFileBlob("021a")
+require.NoError(t, err)
+assert.True(t, b.IsBlob())
+})
+
+t.Run("get a blob", func(t *testing.T) {
+b, err := testrepo.CatFileBlob("021a721a61a1de65865542c405796d1eb985f784")
+require.NoError(t, err)
+assert.True(t, b.IsBlob())
+})
+}