Exclude repo_build_global_links_path from sync

These files are only used by the repo_build during wheel requirements
and should only be needed and used on the repo_container they're on.

When you're transitioning from one distribution release to another,
e.g. xenial -> bionic, syncing the links directory between these
repo_containers can break the wheel building in weird ways.

Depends-on: I3bd6d3d987e32ee11c5f1fcb5c1b4b0fc797e7f9
Change-Id: Iaa2e52b26ba89802e06665ebe43fdf18e515abd7

defaults/main.yml

@@ -54,5 +54,9 @@ repo_server_port: 8181
 repo_git_cache_dirname: openstackgit
 repo_git_cache_dir: "{{ repo_service_home_folder }}/repo/{{ repo_git_cache_dirname }}"
 
+# This directory is used by the repo_build, and will cause problems if synced
+# to repo_containers with other releases.
+repo_build_global_links_dirname: links
+
 # Set the log directory
 repo_service_log_dir: /var/log/apt-cacher-ng

templates/lsyncd.lua.j2

@@ -593,7 +593,7 @@ sync {
     rsync,
     source = "{{ repo_service_home_folder }}/repo",
     target = "{{ hostvars[node]['ansible_host'] }}:{{ repo_service_home_folder }}/repo",
-    exclude = {"{{ repo_git_cache_dirname }}"},
+    exclude = {"{{ repo_git_cache_dirname }}", "{{ repo_build_global_links_dirname }}"},
     rsync = {
         compress = true,
         acls = true,