feat: make git client support creating multiple files in a single commit (#4107)

extracted from #4081

a little bit of a better impl than there, actually...

internal/client/client.go

@@ -61,11 +61,23 @@ type ReleaserURLTemplater interface {
 	ReleaseURLTemplate(ctx *context.Context) (string, error)
 }
 
+// RepoFile is a file to be created.
+type RepoFile struct {
+	Content []byte
+	Path    string
+}
+
 // FileCreator can create the given file to some code repository.
 type FileCreator interface {
 	CreateFile(ctx *context.Context, commitAuthor config.CommitAuthor, repo Repo, content []byte, path, message string) (err error)
 }
 
+// FilesCreator can create the multiple files in some repository and in a single commit.
+type FilesCreator interface {
+	FileCreator
+	CreateFiles(ctx *context.Context, commitAuthor config.CommitAuthor, repo Repo, message string, files []RepoFile) (err error)
+}
+
 // ReleaseNotesGenerator can generate release notes.
 type ReleaseNotesGenerator interface {
 	GenerateReleaseNotes(ctx *context.Context, repo Repo, prev, current string) (string, error)

internal/client/git.go

@@ -31,14 +31,14 @@ type gitClient struct {
 }
 
 // NewGitUploadClient
-func NewGitUploadClient(branch string) FileCreator {
+func NewGitUploadClient(branch string) FilesCreator {
 	return &gitClient{
 		branch: branch,
 	}
 }
 
-// CreateFile implements FileCreator.
-func (g *gitClient) CreateFile(ctx *context.Context, commitAuthor config.CommitAuthor, repo Repo, content []byte, path string, message string) error {
+// CreateFiles implements FilesCreator.
+func (g *gitClient) CreateFiles(ctx *context.Context, commitAuthor config.CommitAuthor, repo Repo, message string, files []RepoFile) (err error) {
 	url, err := tmpl.New(ctx).Apply(repo.GitURL)
 	if err != nil {
 		return fmt.Errorf("git: failed to template git url: %w", err)
@@ -95,20 +95,21 @@ func (g *gitClient) CreateFile(ctx *context.Context, commitAuthor config.CommitA
 		return err
 	}
 
-	location := filepath.Join(cwd, path)
-	log.WithField("path", location).Info("writing")
-	if err := os.MkdirAll(filepath.Dir(location), 0o755); err != nil {
-		return fmt.Errorf("failed to create parent dirs for %s: %w", path, err)
+	for _, file := range files {
+		location := filepath.Join(cwd, file.Path)
+		log.WithField("path", location).Info("writing")
+		if err := os.MkdirAll(filepath.Dir(location), 0o755); err != nil {
+			return fmt.Errorf("failed to create parent dirs for %s: %w", file.Path, err)
+		}
+		if err := os.WriteFile(location, file.Content, 0o644); err != nil {
+			return fmt.Errorf("failed to write %s: %w", file.Path, err)
+		}
+		log.
+			WithField("repository", url).
+			WithField("name", repo.Name).
+			WithField("file", file.Path).
+			Info("pushing")
 	}
-	if err := os.WriteFile(location, content, 0o644); err != nil {
-		return fmt.Errorf("failed to write %s: %w", path, err)
-	}
-
-	log.
-		WithField("repository", url).
-		WithField("name", repo.Name).
-		WithField("file", path).
-		Info("pushing")
 
 	if err := runGitCmds(ctx, cwd, env, [][]string{
 		{"add", "-A", "."},
@@ -121,6 +122,14 @@ func (g *gitClient) CreateFile(ctx *context.Context, commitAuthor config.CommitA
 	return nil
 }
 
+// CreateFile implements FileCreator.
+func (g *gitClient) CreateFile(ctx *context.Context, commitAuthor config.CommitAuthor, repo Repo, content []byte, path string, message string) error {
+	return g.CreateFiles(ctx, commitAuthor, repo, message, []RepoFile{{
+		Path:    path,
+		Content: content,
+	}})
+}
+
 func keyPath(key string) (string, error) {
 	if key == "" {
 		return "", pipe.Skip("private_key is empty")

internal/client/git_test.go

@@ -29,23 +29,28 @@ func TestGitClient(t *testing.T) {
 			PrivateKey: testlib.MakeNewSSHKey(t, keygen.Ed25519, ""),
 			Name:       "test1",
 		}
-		require.NoError(t, cli.CreateFile(
+		require.NoError(t, cli.CreateFiles(
 			ctx,
 			author,
 			repo,
-			[]byte("fake content"),
-			"fake.txt",
 			"hey test",
+			[]RepoFile{
+				{
+					Content: []byte("fake content"),
+					Path:    "fake.txt",
+				},
+				{
+					Content: []byte("fake2 content"),
+					Path:    "fake2.txt",
+				},
+				{
+					Content: []byte("fake content updated"),
+					Path:    "fake.txt",
+				},
+			},
 		))
-		require.NoError(t, cli.CreateFile(
-			ctx,
-			author,
-			repo,
-			[]byte("fake content 2"),
-			"fake.txt",
-			"hey test 2",
-		))
-		require.Equal(t, "fake content 2", string(testlib.CatFileFromBareRepository(t, url, "fake.txt")))
+		require.Equal(t, "fake content updated", string(testlib.CatFileFromBareRepository(t, url, "fake.txt")))
+		require.Equal(t, "fake2 content", string(testlib.CatFileFromBareRepository(t, url, "fake2.txt")))
 	})
 	t.Run("no repo name", func(t *testing.T) {
 		url := testlib.GitMakeBareRepository(t)