Add CODEOWNERS support

CODEOWNERS

@@ -0,0 +1,2 @@
+*	@qmk/collaborators
+/lib/python/*	@skullydazed @erovia

lib/python/qmk/cli/ping/maintainers.py

@@ -17,7 +17,7 @@ def ping_maintainers(cli):
     for file in cli.args.files:
         for maintainer in maintainers(file):
             if maintainer != 'qmk/collaborators':
-                github_maintainers.add('@' + maintainer)
+                github_maintainers.add(maintainer)
 
     if github_maintainers:
         print(f'If you were pinged by this comment you have one or more files being changed by this PR: {" ".join(sorted(github_maintainers))}')

lib/python/qmk/maintainers.py

@@ -1,12 +1,17 @@
 from pathlib import Path
 
+from codeowners import CodeOwners
+
 from qmk.json_schema import json_load
 
+codeowners_file = Path('CODEOWNERS')
+codeowners = CodeOwners(codeowners_file.read_text())
+
 
 def maintainers(file):
     """Yields maintainers for a file.
     """
-    maintainers = 'qmk'
+    maintainers = [owner[1] for owner in codeowners.of(str(file))]
     file_dir = file if file.is_dir() else file.parent
 
     cur_path = Path('.')
@@ -16,7 +21,8 @@ def maintainers(file):
         info_file = cur_path / 'info.json'
         if info_file.exists():
             new_info_data = json_load(info_file)
-            maintainers = new_info_data.get('maintainer', maintainers)
+            maintainers = new_info_data.get('maintainer').replace(',', ' ').split()
+            maintainers = ['@' + maintainer for maintainer in maintainers]
 
-    for maintainer in maintainers.replace(',', ' ').split():
-        yield 'qmk/collaborators' if maintainer == 'qmk' else maintainer
+    for maintainer in maintainers:
+        yield '@qmk/collaborators' if maintainer == 'qmk' else maintainer

requirements-dev.txt

@@ -2,6 +2,7 @@
 -r requirements.txt
 
 # Python development requirements
+codeowners
 nose2
 flake8
 pep8-naming