Handle cases when authorized_keys doesn't exist

Modify Gitlab::AuthorizedKeys#rm_key and #list_key_ids to
handle cases when an `Errno::ENOENT` is raised.

Also added test cases in spec to ensure each method will
still work when authorized_keys doesn't exist.

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/gitlab/authorized_keys.rb b/lib/gitlab/authorized_keys.rb
index 609d2bd9c77..3fe72f5fd43 100644
--- a/lib/gitlab/authorized_keys.rb
+++ b/lib/gitlab/authorized_keys.rb
@@ -68,6 +68,8 @@ module Gitlab
       end
 
       true
+    rescue Errno::ENOENT
+      false
     end
 
     # Clear the authorized_keys file
@@ -96,6 +98,8 @@ module Gitlab
           end
         end
       end
+    rescue Errno::ENOENT
+      []
     end
 
     private