Support auto detecting branch for PRs (#525)

Fix #524

Co-authored-by: harryzcy <harry@harryzheng.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.com>
Reviewed-on: https://gitea.com/gitea/tea/pulls/525
Co-authored-by: harryzcy <harryzcy@noreply.gitea.com>
Co-committed-by: harryzcy <harryzcy@noreply.gitea.com>

modules/task/pull_merge.go

@@ -0,0 +1,24 @@
+// Copyright 2024 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package task
+
+import (
+	"fmt"
+
+	"code.gitea.io/sdk/gitea"
+	"code.gitea.io/tea/modules/config"
+)
+
+// PullMerge merges a PR
+func PullMerge(login *config.Login, repoOwner, repoName string, index int64, opt gitea.MergePullRequestOption) error {
+	client := login.Client()
+	success, _, err := client.MergePullRequest(repoOwner, repoName, index, opt)
+	if err != nil {
+		return err
+	}
+	if !success {
+		return fmt.Errorf("Failed to merge PR. Is it still open?")
+	}
+	return nil
+}