feat: add script to download Gitea issues and create pull requests

New file: gitea_issues_pr.py

@@ -0,0 +1,90 @@
+#!/usr/bin/env python3
+"""
+This script downloads issues from a given Gitea repository and produces a pull request for each issue.
+It assumes that the default branch (default "main") exists and that you have a valid API token if authentication is required.
+"""
+
+import argparse
+import requests
+import sys
+
+def get_default_branch_sha(gitea_url, owner, repo, branch, token):
+    """Retrieve the commit SHA of the default branch."""
+    headers = {"Authorization": f"token {token}"} if token else {}
+    url = f"{gitea_url}/repos/{owner}/{repo}/branches/{branch}"
+    response = requests.get(url, headers=headers)
+    response.raise_for_status()
+    data = response.json()
+    return data['commit']['sha']
+
+def create_branch(gitea_url, owner, repo, new_branch, sha, token):
+    """Create a new branch from the provided SHA."""
+    headers = {"Authorization": f"token {token}", "Content-Type": "application/json"} if token else {"Content-Type": "application/json"}
+    url = f"{gitea_url}/repos/{owner}/{repo}/git/refs"
+    json_data = {"ref": f"refs/heads/{new_branch}", "sha": sha}
+    response = requests.post(url, headers=headers, json=json_data)
+    if response.status_code == 422:
+        print(f"Branch {new_branch} already exists.")
+        return False
+    response.raise_for_status()
+    return True
+
+def get_issues(gitea_url, owner, repo, token):
+    """Download issues from the specified repository."""
+    headers = {"Authorization": f"token {token}"} if token else {}
+    url = f"{gitea_url}/repos/{owner}/{repo}/issues"
+    response = requests.get(url, headers=headers)
+    response.raise_for_status()
+    return response.json()
+
+def create_pull_request(gitea_url, owner, repo, title, head, base, body, token):
+    """Create a pull request for the given branch."""
+    headers = {"Authorization": f"token {token}", "Content-Type": "application/json"} if token else {"Content-Type": "application/json"}
+    url = f"{gitea_url}/repos/{owner}/{repo}/pulls"
+    json_data = {"title": title, "head": head, "base": base, "body": body}
+    response = requests.post(url, headers=headers, json=json_data)
+    response.raise_for_status()
+    return response.json()
+
+def main():
+    parser = argparse.ArgumentParser(description="Download issues and create pull requests for a Gitea repository.")
+    parser.add_argument("--gitea-url", required=True, help="Base URL for the Gitea instance, e.g., https://gitfub.space/api/v1")
+    parser.add_argument("--owner", required=True, help="Owner of the repository")
+    parser.add_argument("--repo", required=True, help="Repository name")
+    parser.add_argument("--base-branch", default="main", help="Base branch to use for new branches (default: main)")
+    parser.add_argument("--token", default="", help="Authentication token if required")
+    args = parser.parse_args()
+
+    try:
+        issues = get_issues(args.gitea_url, args.owner, args.repo, args.token)
+    except Exception as e:
+        sys.exit(f"Failed to retrieve issues: {e}")
+
+    if not issues:
+        print("No issues found.")
+        return
+
+    try:
+        base_sha = get_default_branch_sha(args.gitea_url, args.owner, args.repo, args.base_branch, args.token)
+    except Exception as e:
+        sys.exit(f"Failed to retrieve base branch SHA: {e}")
+
+    for issue in issues:
+        issue_number = issue.get("number")
+        title = issue.get("title", f"Issue {issue_number}")
+        branch_name = f"issue-{issue_number}"
+        try:
+            created = create_branch(args.gitea_url, args.owner, args.repo, branch_name, base_sha, args.token)
+            if created:
+                print(f"Created branch {branch_name} for issue {issue_number}.")
+        except Exception as e:
+            print(f"Error creating branch {branch_name}: {e}")
+        body = f"Automatically generated pull request for issue: {issue.get('html_url', 'unknown')}"
+        try:
+            pr = create_pull_request(args.gitea_url, args.owner, args.repo, f"[Issue {issue_number}] {title}", branch_name, args.base_branch, body, args.token)
+            print(f"Created pull request: {pr.get('html_url', 'unknown')} for issue {issue_number}.")
+        except Exception as e:
+            print(f"Error creating pull request for branch {branch_name}: {e}")
+
+if __name__ == "__main__":
+    main()