[FIX] handle max size label limitation (50 char)

if label name is too long, it is cut, and ended by an hash of the module name.
the module name is present in the description of the label

Author: legalsylvain

src/oca_github_bot/tasks/label_modified_addons.py

@@ -1,5 +1,6 @@
 # Copyright (c) ACSONE SA/NV 2024
 # Distributed under the MIT License (http://opensource.org/licenses/MIT).
+import hashlib
 
 from .. import github
 from ..config import switchable
@@ -8,8 +9,13 @@
 from ..queue import task
 from ..version_branch import is_main_branch_bot_branch
 
+LABEL_COLOR = "ffc"
+# Max size allowed by github for label name
+MAX_LABEL_SIZE = 50
+
 
 def _label_modified_addons(gh, org, repo, pr, dry_run):
+    gh_repo = gh.repository(org, repo)
     gh_pr = gh.pull_request(org, repo, pr)
     target_branch = gh_pr.base.ref
     pr_branch = f"tmp-pr-{pr}"
@@ -23,7 +29,30 @@ def _label_modified_addons(gh, org, repo, pr, dry_run):
         if not modified_addons:
             return
         gh_issue = github.gh_call(gh_pr.issue)
-        new_labels = {f"addon:{modified_addon}" for modified_addon in modified_addons}
+
+        new_labels = set()
+        for modified_addon in modified_addons:
+            label_name = f"addons:{modified_addon}"
+            # To avoid error if label name is too long
+            # we cut big label, and finish by a hash of the module name
+            # the full module name will be present in the description
+            if len(label_name) > MAX_LABEL_SIZE:
+                little_hash = hashlib.sha256(
+                    bytes(modified_addon, "utf-8")
+                ).hexdigest()[:5]
+                label_name = f"{label_name[:44]} {little_hash}"
+            # We create label at repo level, because it is possible to
+            # to set description in create_label() function
+            # (and not in issue.add_labels())
+            if label_name not in [x.name for x in gh_repo.labels()] and not dry_run:
+                github.gh_call(
+                    gh_repo.create_label,
+                    name=label_name,
+                    description=f"Module {modified_addon}",
+                    color=LABEL_COLOR,
+                )
+            new_labels.add(label_name)
+
         if is_main_branch_bot_branch(target_branch):
             new_labels.add(f"series:{target_branch}")
         new_labels = new_labels - {label.name for label in gh_issue.labels()}