admin: Don't overwrite previous ref unless it's different

We shouldn't overwrite deploy/<osname>/previous unless we actually
have something new.

This fixes the bug where two consecutive:

$ ostree admin upgrade foo
$ ostree admin upgrade foo

would end up pruning the data for foo/previous from the repo.
This commit is contained in:
Colin Walters 2013-01-24 17:32:59 -05:00
parent 59c98d0a04
commit 64934202e4

View File

@ -404,6 +404,7 @@ deploy_tree (OtAdminDeploy *self,
ot_lfree char *checkout_target_name = NULL;
ot_lfree char *checkout_target_tmp_name = NULL;
ot_lfree char *resolved_commit = NULL;
gs_free char *resolved_previous_commit = NULL;
GError *temp_error = NULL;
gboolean skip_checkout;
@ -423,6 +424,8 @@ deploy_tree (OtAdminDeploy *self,
if (!ostree_repo_resolve_rev (self->repo, revision, FALSE, &resolved_commit, error))
goto out;
if (!ostree_repo_resolve_rev (self->repo, revision, TRUE, &resolved_previous_commit, error))
goto out;
root = (OstreeRepoFile*)ostree_repo_file_new_root (self->repo, resolved_commit);
if (!ostree_repo_file_ensure_resolved (root, error))
@ -561,7 +564,10 @@ deploy_tree (OtAdminDeploy *self,
if (!ostree_repo_write_ref (self->repo, NULL, current_deployment_ref,
resolved_commit, error))
goto out;
if (previous_deployment_revision != NULL)
/* Only overwrite previous if it's different from what we're deploying now.
*/
if (resolved_previous_commit != NULL
&& strcmp (resolved_previous_commit, resolved_commit) != 0)
{
if (!ostree_repo_write_ref (self->repo, NULL, previous_deployment_ref,
previous_deployment_revision, error))