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github-action/.gitea/scoped_workflows/sync-github-metadata.yml
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TirsvadandClaude Sonnet 5.5 7dcb9c4dfc Add credential preflight, categorized errors and operations guides
Sync workflow: every failure is now reported as `ERROR: [category] message`
with the categories configuration, credentials (HTTP 401), permissions
(HTTP 403) and api (other HTTP errors, unreachable service); HTTP 404 is a
configuration error. Before changing anything the workflow checks that the
GitHub token can administer the mirror repository and stops with a
permissions error otherwise. No secret value is printed.

Guides: onboarding (with runner labels, prerequisites and offline runner
symptoms), credentials (minimum permissions, preflight, rotation) and
troubleshooting (every message mapped to a category and a fix). README
capability table updated. MIL-002 records the verification of scoped
workflow support: Gitea 1.27.3 runs the workflow in this repository;
delivery to other repositories is not yet verified.

Task: MIL-002#2
Task: MIL-002#3
Task: MIL-002#4
Task: MIL-002#5
Task: MIL-002#6
Task: MIL-002#7
Refs #9
Refs #10
Refs #11
Refs #12
Refs #13
Refs #14

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-10-03 21:26:49 +08:00

260 lines
10 KiB
YAML

name: Sync GitHub mirror metadata
on:
push:
branches: [ main ]
workflow_dispatch:
schedule:
- cron: "17 3 * * *"
jobs:
sync-metadata:
permissions:
contents: read
runs-on: ubuntu-latest
steps:
- name: Sync description and topics
env:
GITEA_API_URL: ${{ gitea.api_url }}
GITEA_CREDENTIALS: ${{ secrets.TOKEN_FOR_GITEA }}
SOURCE_REPOSITORY: ${{ gitea.repository }}
GITHUB_CREDENTIALS: ${{ secrets.CREDENTIALS_FOR_GITHUB }}
run: |
python3 - <<'PY'
import json
import os
import sys
import urllib.error
import urllib.parse
import urllib.request
class WorkflowError(RuntimeError):
"""A failure with a category.
configuration: a secret or repository setting is missing or malformed.
credentials: a service rejected the token (HTTP 401).
permissions: the token is valid but not allowed (HTTP 403).
api: any other API or network failure.
"""
def __init__(self, category, message):
super().__init__(f"[{category}] {message}")
self.category = category
def service_name(url):
hostname = urllib.parse.urlsplit(url).hostname
return "GitHub" if hostname == "api.github.com" else "Gitea"
def request_json(url, method="GET", headers=None, body=None):
request = urllib.request.Request(
url,
data=json.dumps(body).encode("utf-8") if body is not None else None,
headers=headers or {},
method=method,
)
service = service_name(url)
try:
with urllib.request.urlopen(request, timeout=30) as response:
content = response.read()
return json.loads(content) if content else None
except urllib.error.HTTPError as error:
detail = (
f"{service} API request failed with HTTP "
f"{error.code} ({error.reason})"
)
if error.code == 401:
raise WorkflowError(
"credentials", f"{detail}. The token was rejected."
) from None
if error.code == 403:
raise WorkflowError(
"permissions",
f"{detail}. The token lacks a required permission.",
) from None
if error.code == 404:
raise WorkflowError(
"configuration",
f"{detail}. The repository was not found or the "
"token cannot see it.",
) from None
raise WorkflowError("api", detail) from None
except (urllib.error.URLError, TimeoutError) as error:
raise WorkflowError(
"api", f"{service} API is unreachable ({error})."
) from None
def parse_github_token(raw_credentials):
raw_credentials = (raw_credentials or "").strip()
if not raw_credentials:
raise WorkflowError(
"configuration", "CREDENTIALS_FOR_GITHUB is missing or empty."
)
try:
credentials = json.loads(raw_credentials)
except json.JSONDecodeError:
raise WorkflowError(
"configuration",
"CREDENTIALS_FOR_GITHUB must contain valid JSON.",
) from None
if not isinstance(credentials, dict):
raise WorkflowError(
"configuration",
"CREDENTIALS_FOR_GITHUB must be a JSON object.",
)
token = credentials.get("GITHUB_PAT")
if not isinstance(token, str) or not token.strip():
raise WorkflowError(
"configuration",
"CREDENTIALS_FOR_GITHUB must contain a non-empty GITHUB_PAT.",
)
return token.strip()
def parse_gitea_token(raw_credentials):
raw_credentials = (raw_credentials or "").strip()
if not raw_credentials:
raise WorkflowError(
"configuration", "TOKEN_FOR_GITEA is missing or empty."
)
try:
credentials = json.loads(raw_credentials)
except json.JSONDecodeError:
token = raw_credentials
else:
if isinstance(credentials, dict):
token = credentials.get("GITEA_TOKEN")
elif isinstance(credentials, str):
token = credentials
else:
token = None
if not isinstance(token, str) or not token.strip():
raise WorkflowError(
"configuration",
"TOKEN_FOR_GITEA must contain a non-empty GITEA_TOKEN.",
)
return token.strip()
def split_repository(full_name):
owner, separator, repo = (full_name or "").partition("/")
if not separator or not owner or not repo:
raise WorkflowError(
"configuration",
"Could not determine the Gitea source repository.",
)
return owner, repo
def find_github_targets(mirrors):
targets = []
for mirror in mirrors:
remote_address = mirror.get("remote_address", "")
if remote_address.startswith("git@github.com:"):
mirror_path = remote_address.split(":", 1)[1]
else:
parsed_remote = urllib.parse.urlsplit(remote_address)
if parsed_remote.hostname != "github.com":
continue
mirror_path = parsed_remote.path.lstrip("/")
mirror_path = mirror_path.removesuffix(".git").strip("/")
path_parts = mirror_path.split("/")
if len(path_parts) != 2 or not all(path_parts):
raise WorkflowError(
"configuration",
"Could not determine the GitHub owner and repository "
"from a configured push mirror.",
)
targets.append(tuple(path_parts))
if len(targets) != 1:
raise WorkflowError(
"configuration",
"Expected exactly one GitHub push mirror for this repository; "
f"found {len(targets)}.",
)
return targets[0]
def main():
github_token = parse_github_token(os.environ.get("GITHUB_CREDENTIALS"))
gitea_token = parse_gitea_token(os.environ.get("GITEA_CREDENTIALS"))
source_owner, source_repo = split_repository(
os.environ.get("SOURCE_REPOSITORY")
)
gitea_api_url = os.environ["GITEA_API_URL"].rstrip("/")
source_url = f"{gitea_api_url}/repos/{source_owner}/{source_repo}"
gitea_headers = {
"Authorization": f"token {gitea_token}",
"Accept": "application/json",
}
source = request_json(source_url, headers=gitea_headers)
mirrors = request_json(
f"{source_url}/push_mirrors",
headers=gitea_headers,
)
if not isinstance(mirrors, list):
print(
"WARNING: Gitea returned an invalid push mirror list; "
"GitHub metadata was not synced."
)
return 0
github_owner, github_repo = find_github_targets(mirrors)
github_api_url = (
"https://api.github.com/repos/"
f"{urllib.parse.quote(github_owner, safe='')}/"
f"{urllib.parse.quote(github_repo, safe='')}"
)
github_headers = {
"Authorization": f"Bearer {github_token}",
"Accept": "application/vnd.github+json",
"X-GitHub-Api-Version": "2022-11-28",
"Content-Type": "application/json",
}
github_repository = request_json(github_api_url, headers=github_headers)
permissions = (github_repository or {}).get("permissions")
if isinstance(permissions, dict) and not permissions.get("admin"):
raise WorkflowError(
"permissions",
f"The GitHub token cannot administer {github_owner}/{github_repo}; "
"editing the description and topics needs administration access.",
)
print("Preflight passed: Gitea and GitHub accepted the credentials.")
request_json(
github_api_url,
method="PATCH",
headers=github_headers,
body={"description": source.get("description") or ""},
)
request_json(
f"{github_api_url}/topics",
method="PUT",
headers=github_headers,
body={"names": source.get("topics") or []},
)
print(f"Synced description and topics to {github_owner}/{github_repo}.")
return 0
if __name__ == "__main__":
try:
sys.exit(main())
except RuntimeError as error:
print(f"ERROR: {error}", file=sys.stderr)
sys.exit(1)
PY