[sysadmin-bin] Handle empty repositories

[Bartłomiej Piotrowski <bpiotrowski src gnome org>]

commit 1eeef6afb3edac292befd4864c5fd9fd6985effb
Author: Bartłomiej Piotrowski <bpiotrowski gnome org>
Date:   Fri Jul 17 14:33:13 2020 +0200

    Handle empty repositories

 gitlab/mirror2github | 30 +++++++++++++++++++++++-------
 1 file changed, 23 insertions(+), 7 deletions(-)
---
diff --git a/gitlab/mirror2github b/gitlab/mirror2github
index 5753b5d..030ad0e 100755
--- a/gitlab/mirror2github
+++ b/gitlab/mirror2github
@@ -46,26 +46,42 @@ def main():
             if prj.namespace["name"] != group.id:
                 continue
 
+            print(prj.name)
             mirror_settings = {
                 "description": f"Read-only mirror of {prj.web_url}",
                 "homepage": prj.web_url,
                 "has_issues": False,
                 "has_wiki": False,
-                "default_branch": prj.default_branch,
             }
 
             try:
-                gh_mirror = gh_org.get_repo(prj.name)
-                gh_mirror.update(**mirror_settings)
+                gh_mirror = gh_org.get_repo(prj.path)
+                gh_branches = [br.name for br in gh_mirror.get_branches()]
+
+                if len(gh_branches):
+                    if (
+                        prj.default_branch not in gh_branches
+                        and prj.default_branch != gh_mirror.default_branch
+                    ):
+                        gh_mirror.create_git_ref(
+                            f"refs/heads/{prj.default_branch}",
+                            gh_mirror.get_commit(
+                                f"refs/heads/{gh_mirror.default_branch}"
+                            ).sha,
+                        )
+
+                    gh_mirror.edit(default_branch=prj.default_branch)
+
+                gh_mirror.edit(**mirror_settings)
             except UnknownObjectException:
-                gh_mirror = gh_org.create_repo(prj.name, **mirror_settings)
+                print(404)
+                gh_mirror = gh_org.create_repo(prj.path, **mirror_settings)
 
-            prj = gl.projects.get(prj.id, lazy=True)
             mirrors = prj.remote_mirrors.list(all=True, lazy=True)
             if not len(mirrors):
-                ssh_url = f"ssh://git github com/GNOME/{prj.name}.git"
+                ssh_url = f"ssh://git github com/GNOME/{prj.path}.git"
                 prj.remote_mirrors.create({"url": ssh_url, "enabled": True})
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     main()