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())
+	})
+}