Keep label description below 100 characters

.github/labels-extra.json

@@ -127,7 +127,7 @@
   {
     "name": "🖥 platform: Linux",
     "color": "#bfd4f2",
-    "description": "ALT Linux, Amazon Linux, Android, Arch Linux, Buildroot, CentOS, CloudLinux OS, Debian, Exherbo Linux, Fedora, Gentoo Linux, Guix System, IBM PowerKVM, KVM for IBM z Systems, Linux Mint, Mageia, Mandriva Linux, openSUSE, Oracle Linux, Parallels, Pidora, Raspbian, RedHat Enterprise Linux, Rocky Linux, Scientific Linux, Slackware, SUSE Linux Enterprise Server, Tuxedo OS, Ubuntu, Unknown Linux, Windows Subsystem for Linux v1, Windows Subsystem for Linux v2, XenServer"
+    "description": "ALT Linux, Amazon Linux, Android, Arch Linux, Buildroot, CentOS, CloudLinux OS, Debian, …"
   },
   {
     "name": "🖥 platform: macOS",

meta_package_manager/labels.py

@@ -56,7 +56,7 @@ def generate_labels(
 ) -> dict[str, str]:
     """Generate labels.
 
-    A dedocated label is produced for each entry of the ``all_labels`` parameter,
+    A dedicated label is produced for each entry of the ``all_labels`` parameter,
     unless it is part of a ``group``. In which case a dedicated label for that group
     will be created.
     """
@@ -83,10 +83,18 @@ def generate_labels(
         assert label_name not in all_labels
         for label_id in label_ids:
             label_map[label_id] = label_name
+        # Build a description that is less than 100 characters.
+        description = ""
+        truncation_mark = ", …"
+        for item_id in sorted(label_ids, key=str.casefold):
+            new_item = f", {item_id}" if description else item_id
+            if len(description) + len(new_item) <= 100 - len(truncation_mark):
+                description += new_item
+            else:
+                description += truncation_mark
+                break
         # Register label to the global registry.
-        LABELS.append(
-            (label_name, color, ", ".join(sorted(label_ids, key=str.casefold))),
-        )
+        LABELS.append((label_name, color, description))
 
     # Sort label_map by their name.
     return dict(sorted(label_map.items(), key=lambda i: str.casefold(i[1])))

tests/test_docs.py

@@ -36,7 +36,7 @@
 
 from meta_package_manager.cli import encoding_args
 from meta_package_manager.inventory import MAIN_PLATFORMS
-from meta_package_manager.labels import MANAGER_PREFIX, PLATFORM_PREFIX
+from meta_package_manager.labels import LABELS, MANAGER_PREFIX, PLATFORM_PREFIX
 from meta_package_manager.pool import pool
 
 """ Test all non-code artifacts depending on manager definitions.
@@ -123,6 +123,14 @@ def test_changelog():
             )
 
 
+def test_labels():
+    for name, color, description in LABELS:
+        assert name
+        assert color
+        assert color.startswith("#")
+        assert len(description) <= 100
+
+
 def test_new_package_manager_issue_template():
     """Check all platforms groups are referenced in the issue template."""
     content = PROJECT_ROOT.joinpath(