refactor & use DefaultBranch for file Creation

internal/client/gitea.go

@@ -62,10 +62,16 @@ func (c *giteaClient) CreateFile(
 	path,
 	message string,
 ) error {
-	owner := repo.Owner
-	repoName := repo.Name
 
-	branchName := "master"
+	// Gitea >= 1.12.0 Use DefaultBranch on ""
+	branchName := ""
+	if err := c.client.CheckServerVersionConstraint(">=1.12.0"); err != nil {
+		r, err := c.client.GetRepo(repo.Owner, repo.Name)
+		if err != nil {
+			return err
+		}
+		branchName = r.DefaultBranch
+	}
 
 	fileOptions := gitea.FileOptions{
 		Message:    message,
@@ -80,21 +86,22 @@ func (c *giteaClient) CreateFile(
 		},
 	}
 
-	currentFile, err := c.client.GetContents(owner, repoName, branchName, path)
+	currentFile, err := c.client.GetContents(repo.Owner, repo.Name, branchName, path)
 	// file not exist, create it
 	if err != nil {
+		// ToDo: https://gitea.com/gitea/go-sdk/issues/303
 		if err.Error() != "404 Not Found" {
 			return err
 		}
-		_, err = c.client.CreateFile(owner, repoName, path, gitea.CreateFileOptions{
+		_, err = c.client.CreateFile(repo.Owner, repo.Name, path, gitea.CreateFileOptions{
 			FileOptions: fileOptions,
 			Content:     base64.StdEncoding.EncodeToString(content),
 		})
 		return err
 	}
 
 	// update file
-	_, err = c.client.UpdateFile(owner, repoName, path, gitea.UpdateFileOptions{
+	_, err = c.client.UpdateFile(repo.Owner, repo.Name, path, gitea.UpdateFileOptions{
 		FileOptions: fileOptions,
 		SHA:         currentFile.SHA,
 		Content:     base64.StdEncoding.EncodeToString(content),