[PATCH v2 17/17] rename_tmp_log(): on SCLD_VANISHED, retry

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If safe_create_leading_directories() fails because a file along the
path unexpectedly vanished, try again from the beginning.  Try at most
3 times.

Signed-off-by: Michael Haggerty <mhagger@xxxxxxxxxxxx>
---
 refs.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/refs.c b/refs.c
index 490525a..810f802 100644
--- a/refs.c
+++ b/refs.c
@@ -2533,7 +2533,14 @@ static int rename_tmp_log(const char *newrefname)
 	int attempts = 4;
 
  retry:
-	if (safe_create_leading_directories(git_path("logs/%s", newrefname))) {
+	switch (safe_create_leading_directories(git_path("logs/%s", newrefname))) {
+	case SCLD_OK:
+		break; /* success */
+	case SCLD_VANISHED:
+		if (--attempts > 0)
+			goto retry;
+		/* fall through */
+	default:
 		error("unable to create directory for %s", newrefname);
 		return -1;
 	}
-- 
1.8.5.2

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