diff options
Diffstat (limited to 'morphlib/cachedrepo.py')
| -rw-r--r-- | morphlib/cachedrepo.py | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/morphlib/cachedrepo.py b/morphlib/cachedrepo.py index e85b0059..996b42f7 100644 --- a/morphlib/cachedrepo.py +++ b/morphlib/cachedrepo.py @@ -1,4 +1,4 @@ -# Copyright (C) 2012-2013 Codethink Limited +# Copyright (C) 2012-2014 Codethink Limited # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by @@ -103,6 +103,7 @@ class CachedRepo(object): self.url = url self.path = path self.is_mirror = not url.startswith('file://') + self.already_updated = False def ref_exists(self, ref): '''Returns True if the given ref exists in the repo''' @@ -221,6 +222,30 @@ class CachedRepo(object): return self._ls_tree(sha1) + def requires_update_for_ref(self, ref): + '''Returns False if there's no need to update this cached repo. + + If the ref points to a specific commit that's already available + locally, there's never any need to update. If it's a named ref and this + repo wasn't already updated in the lifetime of the current process, + it's necessary to update. + + ''' + if not self.is_mirror: + # Repos with file:/// URLs don't ever need updating. + return False + + if self.already_updated: + return False + + # Named refs that are valid SHA1s will confuse this code. + ref_can_change = not morphlib.git.is_valid_sha1(ref) + + if ref_can_change or not self.ref_exists(ref): + return True + else: + return False + def update(self): '''Updates the cached repository using its origin remote. @@ -234,6 +259,7 @@ class CachedRepo(object): try: self._update() + self.already_updated = True except cliapp.AppException, e: raise UpdateError(self) |