feat(gitea): commit the preset stub instead of asking for it

templates.py

@@ -113,6 +113,12 @@ def update(args: argparse.Namespace) -> None:
 
 
 GITEA = os.environ.get("GITEA_URL", "https://git.kotikot.com").rstrip("/")
+RENOVATE_FILE = "renovate.jsonc"
+RENOVATE_STUB = """{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": ["local>templates/renovate"]
+}
+"""
 RENOVATE_LABELS = [
     ("renovate", "1f6feb", "Pull request from the Renovate bot"),
     ("wait-3d", "d29922", "Waits three days: the registry has no release timestamp, the age gate merges it"),
@@ -131,22 +137,29 @@ def gitea_token() -> str:
 
 
 def gitea(args: argparse.Namespace) -> None:
-    """Prepare a Gitea repo for Renovate: the labels it fails without."""
+    """Prepare a Gitea repo for Renovate: labels and the preset stub."""
+    import base64
     import json
     import urllib.error
     import urllib.request
 
     token = gitea_token()
-    for name, color, description in RENOVATE_LABELS:
-        body = json.dumps({"name": name, "color": color, "description": description}).encode()
+
+    def call(method: str, path: str, body: dict | None = None):
         request = urllib.request.Request(
-            f"{GITEA}/api/v1/repos/{args.repo}/labels",
-            data=body,
-            method="POST",
+            f"{GITEA}/api/v1{path}",
+            data=json.dumps(body).encode() if body is not None else None,
+            method=method,
             headers={"Authorization": f"token {token}", "Content-Type": "application/json"},
         )
+        with urllib.request.urlopen(request, timeout=30) as response:
+            raw = response.read()
+            return json.loads(raw) if raw else None
+
+    for name, color, description in RENOVATE_LABELS:
         try:
-            urllib.request.urlopen(request, timeout=30)
+            call("POST", f"/repos/{args.repo}/labels",
+                 {"name": name, "color": color, "description": description})
             print(f"label {name}: created")
         except urllib.error.HTTPError as error:
             if error.code in (409, 422):
@@ -154,13 +167,24 @@ def gitea(args: argparse.Namespace) -> None:
             else:
                 sys.exit(f"label {name}: {error.code} {error.read()[:200]!r}")
 
+    try:
+        call("GET", f"/repos/{args.repo}/contents/{RENOVATE_FILE}")
+        print(f"{RENOVATE_FILE}: already there")
+    except urllib.error.HTTPError as error:
+        if error.code != 404:
+            sys.exit(f"{RENOVATE_FILE}: {error.code} {error.read()[:200]!r}")
+        call("POST", f"/repos/{args.repo}/contents/{RENOVATE_FILE}", {
+            "content": base64.b64encode(RENOVATE_STUB.encode()).decode(),
+            "message": "chore(renovate): extend the shared preset",
+        })
+        print(f"{RENOVATE_FILE}: created")
+
     print(
-        "\nLabels done. Two things are still manual, and neither happens by itself:\n"
-        f"  1. renovate.jsonc in {args.repo} with"
-        ' {"extends": ["local>templates/renovate"]}\n'
-        "  2. the repo added to `repositories` in renovate-config.js of infra/komodo,\n"
-        "     plus the bot given write access to it. Extending the preset subscribes\n"
-        "     nothing: the bot only visits repos named in that list."
+        "\nOne thing is still manual, and it does not happen by itself: the repo has\n"
+        "to be added to `repositories` in projects/personal/renovate/renovate-config.js\n"
+        "of infra/komodo, and the `renovate` team of its organization needs write\n"
+        "access to it. Extending the preset subscribes nothing - the bot only visits\n"
+        "repos named in that list."
     )
 
 
@@ -182,7 +206,7 @@ def main() -> None:
     u.add_argument("--ask", action="store_true", help="ask every question again")
     u.add_argument("--defaults", action="store_true")
     u.set_defaults(func=update)
-    g = sub.add_parser("gitea", help="Create the Renovate labels a repo needs")
+    g = sub.add_parser("gitea", help="Set a repo up for Renovate: labels and preset stub")
     g.add_argument("repo", help="org/name on Gitea")
     g.set_defaults(func=gitea)
     args = parser.parse_args()