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Add /ostree/current-etc symlink to current configuration 

Configuration associated with a specific revision is stored in a folder
named <revision>-etc. In a similar spirit, add /ostree/current-etc, pointing
to the -etc folder for the revision named by current. This allows
easy editing of configuration from the host distribution, and allows
diffing current/etc and current-etc for configuration changes.

https://bugzilla.gnome.org/show_bug.cgi?id=684049
This commit is contained in:
Giovanni Campagna 2012-09-16 23:56:13 +02:00
parent 8a98e8d964
commit 8c9406637c
1 changed files with 19 additions and 2 deletions
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21
src/ostree/ot-admin-builtin-deploy.c
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@ -47,7 +47,8 @@ static GOptionEntry options[] = {
*
* Atomically swap the /ostree/current symbolic link to point to a new
* path. If successful, the old current will be saved as
* /ostree/previous.
* /ostree/previous, and /ostree/current-etc will be a link to the
* current /etc subdirectory.
*
* Unless the new-current equals current, in which case, do nothing.
*/
@ -60,18 +61,23 @@ update_current (OtAdminDeploy *self,
{
gboolean ret = FALSE;
ot_lobj GFile *current_path = NULL;
ot_lobj GFile *current_etc_path = NULL;
ot_lobj GFile *previous_path = NULL;
ot_lobj GFile *tmp_current_path = NULL;
ot_lobj GFile *tmp_current_etc_path = NULL;
ot_lobj GFile *tmp_previous_path = NULL;
ot_lobj GFileInfo *previous_info = NULL;
ot_lfree char *relative_current = NULL;
ot_lfree char *relative_current_etc = NULL;
ot_lfree char *relative_previous = NULL;
current_path = g_file_get_child (self->ostree_dir, "current");
current_etc_path = g_file_get_child (self->ostree_dir, "current-etc");
previous_path = g_file_get_child (self->ostree_dir, "previous");
relative_current = g_file_get_relative_path (self->ostree_dir, deploy_target);
g_assert (relative_current);
relative_current_etc = g_strconcat (relative_current, "-etc", NULL);
if (current_deployment)
{
@ -105,9 +111,20 @@ update_current (OtAdminDeploy *self,
goto out;
}
tmp_current_etc_path = g_file_get_child (self->ostree_dir, "tmp-current-etc");
(void) ot_gfile_unlink (tmp_current_etc_path, NULL, NULL);
if (symlink (relative_current_etc, ot_gfile_get_path_cached (tmp_current_etc_path)) < 0)
{
ot_util_set_error_from_errno (error, errno);
goto out;
}
if (!ot_gfile_rename (tmp_current_path, current_path,
cancellable, error))
goto out;
if (!ot_gfile_rename (tmp_current_etc_path, current_etc_path,
cancellable, error))
goto out;
if (tmp_previous_path)
{
@ -314,7 +331,7 @@ merge_etc_changes (OtAdminDeploy *self,
*
* Merge configuration changes from the old deployment, if any.
*
* Update the OSTREE_DIR/current and OSTREE_DIR/previous symbolic
* Update the OSTREE_DIR/current{,-etc} and OSTREE_DIR/previous symbolic
* links.
*/
static gboolean