log_ref_setup is used to do several semi-related things :
* sometimes it will create a new reflog including missing parent directories
and cleaning up any conflicting stale directories in the path.
* fill in a filename buffer for the full path to the reflog.
* unconditionally re-adjust the permissions for the file.
This function is only called from two places: checkout.c where it is always
used to create a reflog and refs.c:log_ref_write where it sometimes are
used to create a reflog and sometimes just used to fill in the filename.
Rename log_ref_setup to create_reflog and change it to only take the
refname as argument to make its signature similar to delete_reflog and
reflog_exists. Change create_reflog to ignore log_all_ref_updates and
"unconditionally" create the reflog when called. Since checkout.c always
wants to create a reflog we can call create_reflog directly and avoid the
temp-and-log_all_ref_update dance.
In log_ref_write, only call create_reflog iff we want to create a reflog
and if the reflog does not yet exist. This means that for the common case
where the log already exists we now only need to perform a single lstat()
instead of a open(O_CREAT)+lstat()+close().
Signed-off-by: Ronnie Sahlberg <sahlberg@xxxxxxxxxx>
---
builtin/checkout.c | 8 +-------
refs.c | 22 +++++++++++++---------
refs.h | 8 +++-----
3 files changed, 17 insertions(+), 21 deletions(-)
diff --git a/builtin/checkout.c b/builtin/checkout.c
index f1dc56e..808c58f 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -583,19 +583,13 @@ static void update_refs_for_switch(const struct checkout_opts *opts,
if (opts->new_branch) {
if (opts->new_orphan_branch) {
if (opts->new_branch_log && !log_all_ref_updates) {
- int temp;
- char log_file[PATH_MAX];
char *ref_name = mkpath("refs/heads/%s", opts->new_orphan_branch);
- temp = log_all_ref_updates;
- log_all_ref_updates = 1;
- if (log_ref_setup(ref_name, log_file, sizeof(log_file))) {
+ if (create_reflog(ref_name)) {
fprintf(stderr, _("Can not do reflog for '%s'\n"),
opts->new_orphan_branch);
- log_all_ref_updates = temp;
return;
}
- log_all_ref_updates = temp;
}
}
else
diff --git a/refs.c b/refs.c
index 1288c49..9653a01 100644
--- a/refs.c
+++ b/refs.c
@@ -2822,16 +2822,16 @@ static int copy_msg(char *buf, const char *msg)
}
/* This function must set a meaningful errno on failure */
-int log_ref_setup(const char *refname, char *logfile, int bufsize)
+int create_reflog(const char *refname)
{
int logfd, oflags = O_APPEND | O_WRONLY;
+ char logfile[PATH_MAX];
- git_snpath(logfile, bufsize, "logs/%s", refname);
- if (log_all_ref_updates &&
- (starts_with(refname, "refs/heads/") ||
- starts_with(refname, "refs/remotes/") ||
- starts_with(refname, "refs/notes/") ||
- !strcmp(refname, "HEAD"))) {
+ git_snpath(logfile, sizeof(logfile), "logs/%s", refname);
+ if (starts_with(refname, "refs/heads/") ||
+ starts_with(refname, "refs/remotes/") ||
+ starts_with(refname, "refs/notes/") ||
+ !strcmp(refname, "HEAD")) {
if (safe_create_leading_directories(logfile) < 0) {
int save_errno = errno;
error("unable to create directory for %s", logfile);
@@ -2900,16 +2900,20 @@ static int log_ref_write_fd(int fd, const unsigned char *old_sha1,
static int log_ref_write(const char *refname, const unsigned char *old_sha1,
const unsigned char *new_sha1, const char *msg)
{
- int logfd, result, oflags = O_APPEND | O_WRONLY;
+ int logfd, result = 0, oflags = O_APPEND | O_WRONLY;
char log_file[PATH_MAX];
if (log_all_ref_updates < 0)
log_all_ref_updates = !is_bare_repository();
- result = log_ref_setup(refname, log_file, sizeof(log_file));
+ if (log_all_ref_updates && !reflog_exists(refname))
+ result = create_reflog(refname);
+
if (result)
return result;
+ git_snpath(log_file, sizeof(log_file), "logs/%s", refname);
+
logfd = open(log_file, oflags);
if (logfd < 0)
return 0;
diff --git a/refs.h b/refs.h
index 0564955..e7892fc 100644
--- a/refs.h
+++ b/refs.h
@@ -203,11 +203,6 @@ extern int commit_ref(struct ref_lock *lock);
/** Release any lock taken but not written. **/
extern void unlock_ref(struct ref_lock *lock);
-/*
- * Setup reflog before using. Set errno to something meaningful on failure.
- */
-int log_ref_setup(const char *refname, char *logfile, int bufsize);
-
/** Reads log for the value of ref during at_time. **/
extern int read_ref_at(const char *refname, unsigned long at_time, int cnt,
unsigned char *sha1, char **msg,
@@ -216,6 +211,9 @@ extern int read_ref_at(const char *refname, unsigned long at_time, int cnt,
/** Check if a particular reflog exists */
extern int reflog_exists(const char *refname);
+/** Create reflog. Set errno to something meaningful on failure. */
+extern int create_reflog(const char *refname);
+
/** Delete a reflog */
extern int delete_reflog(const char *refname);
--
2.0.0.467.g08c0633
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