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[PATCH v2 19/20] try_remove_empty_parents(): teach to remove parents of reflogs, too

From
Michael Haggerty <mhagger@alum.mit.edu>
Date
Feb 25, 2016, 13:16 UTC
Message-ID
<2b81d46035f578f0144843065b178ed428c54acb.1456405699.git.mhagger@alum.mit.edu>
In-Reply-To
<cover.1456405698.git.mhagger@alum.mit.edu>

Add a new "flags" parameter that tells the function whether to remove empty parent directories of the loose reference file, of the reflog file, or both. The new functionality is not yet used.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
---
 refs/files-backend.c | 24 ++++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)
diff --git a/refs/files-backend.c b/refs/files-backend.c
index b137171..9ebb188 100644
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -2198,10 +2198,18 @@ static int pack_if_possible_fn(struct ref_entry *entry, void *cb_data)
 	return 0;
 }
 
+enum {
+	REMOVE_EMPTY_PARENTS_REF = 0x01,
+	REMOVE_EMPTY_PARENTS_REFLOG = 0x02
+};
+
 /*
- * Remove empty parents, but spare refs/ and immediate subdirs.
+ * Remove empty parent directories associated with the specified
+ * reference and/or its reflog, but spare [logs/]refs/ and immediate
+ * subdirs. flags is a combination of REMOVE_EMPTY_PARENTS_REF and/or
+ * REMOVE_EMPTY_PARENTS_REFLOG.
  */
-static void try_remove_empty_parents(const char *refname)
+static void try_remove_empty_parents(const char *refname, unsigned int flags)
 {
 	struct strbuf buf = STRBUF_INIT;
 	char *p, *q;
@@ -2216,7 +2224,7 @@ static void try_remove_empty_parents(const char *refname)
 			p++;
 	}
 	q = buf.buf + buf.len;
-	while (1) {
+	while (flags & (REMOVE_EMPTY_PARENTS_REF | REMOVE_EMPTY_PARENTS_REFLOG)) {
 		while (q > p && *q != '/')
 			q--;
 		if (q > p && *(q-1) == '/')
@@ -2224,8 +2232,12 @@ static void try_remove_empty_parents(const char *refname)
 		if (q == p)
 			break;
 		strbuf_setlen(&buf, q - buf.buf);
-		if (rmdir(git_path("%s", buf.buf)))
-			break;
+		if ((flags & REMOVE_EMPTY_PARENTS_REF) &&
+		    rmdir(git_path("%s", buf.buf)))
+			flags &= ~REMOVE_EMPTY_PARENTS_REF;
+		if ((flags & REMOVE_EMPTY_PARENTS_REFLOG) &&
+		    rmdir(git_path("logs/%s", buf.buf)))
+			flags &= ~REMOVE_EMPTY_PARENTS_REFLOG;
 	}
 	strbuf_release(&buf);
 }
@@ -2251,7 +2263,7 @@ static void prune_ref(struct ref_to_prune *r)
 	}
 	ref_transaction_free(transaction);
 	strbuf_release(&err);
-	try_remove_empty_parents(r->name);
+	try_remove_empty_parents(r->name, REMOVE_EMPTY_PARENTS_REF);
 }
 
 static void prune_refs(struct ref_to_prune *r)
-- 
2.7.0
Previous: Michael HaggertyNext: Michael Haggerty
Message 20 of 21 in “Delete directories left empty after ref deletion”
  1. 00/20 Delete directories left empty after ref deletionMichael Haggerty, Feb 25, 2016
  2. 01/20 safe_create_leading_directories_const(): preserve errnoMichael Haggerty, Feb 25, 2016
  3. 02/20 safe_create_leading_directories(): set errno on SCLD_EXISTSMichael Haggerty, Feb 25, 2016
  4. 03/20 raceproof_create_file(): new functionMichael Haggerty, Feb 25, 2016
  5. 04/20 lock_ref_sha1_basic(): use raceproof_create_file()Michael Haggerty, Feb 25, 2016
  6. 05/20 rename_tmp_log(): use raceproof_create_file()Michael Haggerty, Feb 25, 2016
  7. 06/20 rename_tmp_log(): improve error reportingMichael Haggerty, Feb 25, 2016
  8. 07/20 log_ref_setup(): separate code for create vs non-createMichael Haggerty, Feb 25, 2016
  9. 08/20 log_ref_setup(): improve robustness against racesMichael Haggerty, Feb 25, 2016
  10. 09/20 log_ref_setup(): pass the open file descriptor back to the callerMichael Haggerty, Feb 25, 2016
  11. 10/20 log_ref_write_1(): don't depend on logfileMichael Haggerty, Feb 25, 2016
  12. 11/20 log_ref_setup(): manage the name of the reflog file internallyMichael Haggerty, Feb 25, 2016
  13. 12/20 log_ref_write_1(): inline functionMichael Haggerty, Feb 25, 2016
  14. 13/20 try_remove_empty_parents(): rename parameter "name" -> "refname"Michael Haggerty, Feb 25, 2016
  15. 14/20 try_remove_empty_parents(): don't trash argument contentsMichael Haggerty, Feb 25, 2016
  16. 15/20 try_remove_empty_parents(): don't accommodate consecutive slashesMichael Haggerty, Feb 25, 2016
  17. 16/20 t5505: use "for-each-ref" to test for the non-existence of referencesMichael Haggerty, Feb 25, 2016
  18. 17/20 delete_ref_loose(): derive loose reference path from lockMichael Haggerty, Feb 25, 2016
  19. 18/20 delete_ref_loose(): inline functionMichael Haggerty, Feb 25, 2016
  20. 19/20 try_remove_empty_parents(): teach to remove parents of reflogs, tooMichael Haggerty, Feb 25, 2016
  21. 20/20 ref_transaction_commit(): clean up empty directoriesMichael Haggerty, Feb 25, 2016

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