When you have for example a bare repository stored on NFS, and that you
create new workdirs locally (using contrib's git-new-workdir), logs/refs
is a symlink to a different device. Hence when the reflogs are renamed,
all must happen below logs/refs or one gets cross device rename errors
like:
git branch -m foo
error: unable to move logfile logs/refs/heads/master to tmp-renamed-log: Invalid cross-device link
fatal: Branch rename failed
The fix is hence to use logs/refs/.tmp-renamed-log as a temporary log
name, instead of just tmp-renamed-log.
Signed-off-by: Pierre Habouzit <madcoder@xxxxxxxxxx>
---
refs.c | 21 +++++++++++++++------
1 files changed, 15 insertions(+), 6 deletions(-)
diff --git a/refs.c b/refs.c
index 6f486ae..b540067 100644
--- a/refs.c
+++ b/refs.c
@@ -1090,6 +1090,15 @@ int delete_ref(const char *refname, const unsigned char *sha1, int delopt)
return ret;
}
+/*
+ * People using contrib's git-new-workdir have .git/logs/refs ->
+ * /some/other/path/.git/logs/refs, and that may live on another device.
+ *
+ * IOW, to avoid cross device rename errors, the temporary renamed log must
+ * live into logs/refs.
+ */
+#define TMP_RENAMED_LOG "logs/refs/.tmp-renamed-log"
+
int rename_ref(const char *oldref, const char *newref, const char *logmsg)
{
static const char renamed_ref[] = "RENAMED-REF";
@@ -1123,8 +1132,8 @@ int rename_ref(const char *oldref, const char *newref, const char *logmsg)
if (write_ref_sha1(lock, orig_sha1, logmsg))
return error("unable to save current sha1 in %s", renamed_ref);
- if (log && rename(git_path("logs/%s", oldref), git_path("tmp-renamed-log")))
- return error("unable to move logfile logs/%s to tmp-renamed-log: %s",
+ if (log && rename(git_path("logs/%s", oldref), git_path(TMP_RENAMED_LOG)))
+ return error("unable to move logfile logs/%s to "TMP_RENAMED_LOG": %s",
oldref, strerror(errno));
if (delete_ref(oldref, orig_sha1, REF_NODEREF)) {
@@ -1150,7 +1159,7 @@ int rename_ref(const char *oldref, const char *newref, const char *logmsg)
}
retry:
- if (log && rename(git_path("tmp-renamed-log"), git_path("logs/%s", newref))) {
+ if (log && rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", newref))) {
if (errno==EISDIR || errno==ENOTDIR) {
/*
* rename(a, b) when b is an existing
@@ -1163,7 +1172,7 @@ int rename_ref(const char *oldref, const char *newref, const char *logmsg)
}
goto retry;
} else {
- error("unable to move logfile tmp-renamed-log to logs/%s: %s",
+ error("unable to move logfile "TMP_RENAMED_LOG" to logs/%s: %s",
newref, strerror(errno));
goto rollback;
}
@@ -1203,8 +1212,8 @@ int rename_ref(const char *oldref, const char *newref, const char *logmsg)
error("unable to restore logfile %s from %s: %s",
oldref, newref, strerror(errno));
if (!logmoved && log &&
- rename(git_path("tmp-renamed-log"), git_path("logs/%s", oldref)))
- error("unable to restore logfile %s from tmp-renamed-log: %s",
+ rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", oldref)))
+ error("unable to restore logfile %s from "TMP_RENAMED_LOG": %s",
oldref, strerror(errno));
return 1;
--
1.7.2.rc1.212.g850a.dirty
--
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