Add GetFormatPatch receiver for a repository (#103)

* Add GetFormatPatch receiver for a repository

Includes test

* Use binary for GetFormatPatch

Also add missing test file

* Add empty line

Author: strk

repo_pull.go

@@ -73,3 +73,8 @@ func (repo *Repository) GetPullRequestInfo(basePath, baseBranch, headBranch stri
 func (repo *Repository) GetPatch(base, head string) ([]byte, error) {
 	return NewCommand("diff", "-p", "--binary", base, head).RunInDirBytes(repo.Path)
 }
+
+// GetFormatPatch generates and returns format-patch data between given revisions.
+func (repo *Repository) GetFormatPatch(base, head string) ([]byte, error) {
+	return NewCommand("format-patch", "--binary", "--stdout", base + "..." + head).RunInDirBytes(repo.Path)
+}

repo_pull_test.go

@@ -0,0 +1,21 @@
+// Copyright 2018 The Gitea 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"
+)
+
+func TestGetFormatPatch(t *testing.T) {
+	repo, err := OpenRepository(".");
+	assert.NoError(t, err)
+	patchb, err := repo.GetFormatPatch("cdb43f0e^", "cdb43f0e")
+	assert.NoError(t, err)
+	patch := string(patchb)
+	assert.Regexp(t, "^From cdb43f0e", patch)
+	assert.Regexp(t, "Subject: .PATCH. add @daviian as maintainer", patch)
+}