git-serve.py: Automatically create repositories

Create a fresh Git repository when cloning or pushing using a path that
does not yet exist.

Implements FS#43308.
Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>

scripts/git-integration/git-serve.py

@@ -119,6 +119,8 @@ if action == 'git-upload-pack' or action == 'git-receive-pack':
     if not repo_path_validate(path):
         die('%s: invalid path: %s' % (action, path))
     pkgbase = repo_path_get_pkgbase(path)
+    if not os.path.exists(path):
+        setup_repo(pkgbase, user)
     if action == 'git-receive-pack':
         if not check_permissions(pkgbase, user):
             die('%s: permission denied: %s' % (action, user))