[PATCH v2 07/11] lib: use the compaction backup path provided by the caller

[Jani Nikula]

The extra path component added by the lib is a magic value that the
caller just has to know. This is demonstrated by the current code,
which indeed has "xapian.old" both sides of the interface. Use the
backup path provided by the lib caller verbatim, without adding
anything to it.

---

v2: add xapian.old in cli
---
 lib/database.cc   | 14 ++++----------
 notmuch-compact.c | 10 +++++++---
 2 files changed, 11 insertions(+), 13 deletions(-)

diff --git a/lib/database.cc b/lib/database.cc
index 5a01703..a021bf1 100644
--- a/lib/database.cc
+++ b/lib/database.cc
@@ -868,7 +868,6 @@ notmuch_database_compact (const char* path,
 {
     void *local;
     char *notmuch_path, *xapian_path, *compact_xapian_path;
-    char *old_xapian_path = NULL;
     notmuch_status_t ret = NOTMUCH_STATUS_SUCCESS;
     notmuch_database_t *notmuch = NULL;
     struct stat statbuf;
@@ -898,13 +897,8 @@ notmuch_database_compact (const char* path,
     }
 
     if (backup_path != NULL) {
-	if (! (old_xapian_path = talloc_asprintf (local, "%s/xapian.old", backup_path))) {
-	    ret = NOTMUCH_STATUS_OUT_OF_MEMORY;
-	    goto DONE;
-	}
-
-	if (stat(old_xapian_path, &statbuf) != -1) {
-	    fprintf (stderr, "Backup path already exists: %s\n", old_xapian_path);
+	if (stat(backup_path, &statbuf) != -1) {
+	    fprintf (stderr, "Backup path already exists: %s\n", backup_path);
 	    ret = NOTMUCH_STATUS_FILE_ERROR;
 	    goto DONE;
 	}
@@ -928,8 +922,8 @@ notmuch_database_compact (const char* path,
 	goto DONE;
     }
 
-    if (old_xapian_path != NULL) {
-	if (rename(xapian_path, old_xapian_path)) {
+    if (backup_path) {
+	if (rename(xapian_path, backup_path)) {
 	    fprintf (stderr, "Error moving old database out of the way\n");
 	    ret = NOTMUCH_STATUS_FILE_ERROR;
 	    goto DONE;
diff --git a/notmuch-compact.c b/notmuch-compact.c
index ee7afcf..55dc731 100644
--- a/notmuch-compact.c
+++ b/notmuch-compact.c
@@ -32,9 +32,13 @@ notmuch_compact_command (notmuch_config_t *config,
 			 unused (char *argv[]))
 {
     const char *path = notmuch_config_get_database_path (config);
-    const char *backup_path = path;
+    const char *backup_path;
     notmuch_status_t ret;
 
+    backup_path = talloc_asprintf (config, "%s/xapian.old", path);
+    if (! backup_path)
+	return 1;
+
     printf ("Compacting database...\n");
     ret = notmuch_database_compact (path, backup_path, status_update_cb, NULL);
     if (ret) {
@@ -42,11 +46,11 @@ notmuch_compact_command (notmuch_config_t *config,
     } else {
 	printf ("\n");
 	printf ("\n");
-	printf ("The old database has been moved to %s/xapian.old", backup_path);
+	printf ("The old database has been moved to %s", backup_path);
 	printf ("\n");
 	printf ("To delete run,\n");
 	printf ("\n");
-	printf ("    rm -R %s/xapian.old\n", backup_path);
+	printf ("    rm -R %s\n", backup_path);
 	printf ("\n");
     }
 
-- 
1.8.4.rc3