fix: Processing default branch for bitbucket (#155)

Fixed:
- Error 'API not supported' while processing default branch for Codebase.
  Now, this error is logged, and don't block Codebase.
- The operator creates new branches from Codebase.spec.defaultBranch.

controllers/codebase/service/chain/put_project.go

@@ -369,10 +369,10 @@ func (h *PutProject) setDefaultBranch(
 		codebase.Spec.GetProjectID(),
 		codebase.Spec.DefaultBranch,
 	); err != nil {
-		if errors.Is(gitprovider.ErrApiNotSupported, err) {
+		if errors.Is(err, gitprovider.ErrApiNotSupported) {
 			// We can skip this error, because it is not supported by Git provider.
 			// And this is not critical for the whole process.
-			log.Error(err, "Setting default branch is not supported by Git provider. Set it manually if needed")
+			log.Info("Setting default branch is not supported by Git provider. Set it manually if needed")
 
 			return nil
 		}

controllers/codebasebranch/chain/put_branch_in_git/put_branch_in_git.go

@@ -105,7 +105,18 @@ func (h PutBranchInGit) ServeRequest(ctx context.Context, branch *codebaseApi.Co
 		}
 	}
 
-	err := h.Git.CreateRemoteBranch(string(secret.Data[util.PrivateSShKeyName]), gitServer.Spec.GitUser, wd, branch.Spec.BranchName, branch.Spec.FromCommit, gitServer.Spec.SshPort)
+	currentBranchName, err := h.Git.GetCurrentBranchName(wd)
+	if err != nil {
+		return fmt.Errorf("failed to get current branch name: %w", err)
+	}
+
+	if currentBranchName != codebase.Spec.DefaultBranch {
+		if err = h.Git.CheckoutRemoteBranchBySSH(string(secret.Data[util.PrivateSShKeyName]), gitServer.Spec.GitUser, wd, codebase.Spec.DefaultBranch); err != nil {
+			return fmt.Errorf("failed to checkout to default branch %s: %w", codebase.Spec.DefaultBranch, err)
+		}
+	}
+
+	err = h.Git.CreateRemoteBranch(string(secret.Data[util.PrivateSShKeyName]), gitServer.Spec.GitUser, wd, branch.Spec.BranchName, branch.Spec.FromCommit, gitServer.Spec.SshPort)
 	if err != nil {
 		setFailedFields(branch, codebaseApi.PutGitBranch, err.Error())