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files-backend: add and use files_reflog_path()

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Keep repo-related path handling in one place. This will make it easier
to add submodule/multiworktree support later.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Nguyễn Thái Ngọc Duy 2017-03-26 09:42:22 +07:00 committed by Junio C Hamano
parent a5c1efd693
commit 802de3da07
1 changed files with 86 additions and 56 deletions
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142
refs/files-backend.c
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@ -165,7 +165,8 @@ static struct ref_entry *create_dir_entry(struct files_ref_store *ref_store,
const char *dirname, size_t len,
int incomplete);
static void add_entry_to_dir(struct ref_dir *dir, struct ref_entry *entry);
static int files_log_ref_write(const char *refname, const unsigned char *old_sha1,
static int files_log_ref_write(struct files_ref_store *refs,
const char *refname, const unsigned char *old_sha1,
const unsigned char *new_sha1, const char *msg,
int flags, struct strbuf *err);
@ -1167,6 +1168,18 @@ static const char *files_packed_refs_path(struct files_ref_store *refs)
return refs->packed_refs_path;
}
static void files_reflog_path(struct files_ref_store *refs,
struct strbuf *sb,
const char *refname)
{
if (!refname) {
strbuf_git_path(sb, "logs");
return;
}
strbuf_git_path(sb, "logs/%s", refname);
}
/*
* Get the packed_ref_cache for the specified files_ref_store,
* creating it if necessary.
@ -2313,7 +2326,9 @@ enum {
* 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, unsigned int flags)
static void try_remove_empty_parents(struct files_ref_store *refs,
const char *refname,
unsigned int flags)
{
struct strbuf buf = STRBUF_INIT;
struct strbuf sb = STRBUF_INIT;
@ -2345,7 +2360,7 @@ static void try_remove_empty_parents(const char *refname, unsigned int flags)
flags &= ~REMOVE_EMPTY_PARENTS_REF;
strbuf_reset(&sb);
strbuf_git_path(&sb, "logs/%s", buf.buf);
files_reflog_path(refs, &sb, buf.buf);
if ((flags & REMOVE_EMPTY_PARENTS_REFLOG) && rmdir(sb.buf))
flags &= ~REMOVE_EMPTY_PARENTS_REFLOG;
}
@ -2538,15 +2553,15 @@ static int rename_tmp_log_callback(const char *path, void *cb_data)
}
}
static int rename_tmp_log(const char *newrefname)
static int rename_tmp_log(struct files_ref_store *refs, const char *newrefname)
{
struct strbuf path = STRBUF_INIT;
struct strbuf tmp = STRBUF_INIT;
struct rename_cb cb;
int ret;
strbuf_git_path(&path, "logs/%s", newrefname);
strbuf_git_path(&tmp, "logs/%s", TMP_RENAMED_LOG);
files_reflog_path(refs, &path, newrefname);
files_reflog_path(refs, &tmp, TMP_RENAMED_LOG);
cb.tmp_renamed_log = tmp.buf;
ret = raceproof_create_file(path.buf, rename_tmp_log_callback, &cb);
if (ret) {
@ -2606,9 +2621,9 @@ static int files_rename_ref(struct ref_store *ref_store,
int log, ret;
struct strbuf err = STRBUF_INIT;
strbuf_git_path(&sb_oldref, "logs/%s", oldrefname);
strbuf_git_path(&sb_newref, "logs/%s", newrefname);
strbuf_git_path(&tmp_renamed_log, "logs/%s", TMP_RENAMED_LOG);
files_reflog_path(refs, &sb_oldref, oldrefname);
files_reflog_path(refs, &sb_newref, newrefname);
files_reflog_path(refs, &tmp_renamed_log, TMP_RENAMED_LOG);
log = !lstat(sb_oldref.buf, &loginfo);
if (log && S_ISLNK(loginfo.st_mode)) {
@ -2671,7 +2686,7 @@ static int files_rename_ref(struct ref_store *ref_store,
}
}
if (log && rename_tmp_log(newrefname))
if (log && rename_tmp_log(refs, newrefname))
goto rollback;
logmoved = log;
@ -2786,10 +2801,15 @@ static int open_or_create_logfile(const char *path, void *cb)
* set *logfd to -1. On failure, fill in *err, set *logfd to -1, and
* return -1.
*/
static int log_ref_setup(const char *refname, int force_create,
static int log_ref_setup(struct files_ref_store *refs,
const char *refname, int force_create,
int *logfd, struct strbuf *err)
{
char *logfile = git_pathdup("logs/%s", refname);
struct strbuf logfile_sb = STRBUF_INIT;
char *logfile;
files_reflog_path(refs, &logfile_sb, refname);
logfile = strbuf_detach(&logfile_sb, NULL);
if (force_create || should_autocreate_reflog(refname)) {
if (raceproof_create_file(logfile, open_or_create_logfile, logfd)) {
@ -2839,12 +2859,11 @@ static int files_create_reflog(struct ref_store *ref_store,
const char *refname, int force_create,
struct strbuf *err)
{
struct files_ref_store *refs =
files_downcast(ref_store, 0, "create_reflog");
int fd;
/* Check validity (but we don't need the result): */
files_downcast(ref_store, 0, "create_reflog");
if (log_ref_setup(refname, force_create, &fd, err))
if (log_ref_setup(refs, refname, force_create, &fd, err))
return -1;
if (fd >= 0)
@ -2879,7 +2898,8 @@ static int log_ref_write_fd(int fd, const unsigned char *old_sha1,
return 0;
}
static int files_log_ref_write(const char *refname, const unsigned char *old_sha1,
static int files_log_ref_write(struct files_ref_store *refs,
const char *refname, const unsigned char *old_sha1,
const unsigned char *new_sha1, const char *msg,
int flags, struct strbuf *err)
{
@ -2888,7 +2908,8 @@ static int files_log_ref_write(const char *refname, const unsigned char *old_sha
if (log_all_ref_updates == LOG_REFS_UNSET)
log_all_ref_updates = is_bare_repository() ? LOG_REFS_NONE : LOG_REFS_NORMAL;
result = log_ref_setup(refname, flags & REF_FORCE_CREATE_REFLOG,
result = log_ref_setup(refs, refname,
flags & REF_FORCE_CREATE_REFLOG,
&logfd, err);
if (result)
@ -2902,7 +2923,7 @@ static int files_log_ref_write(const char *refname, const unsigned char *old_sha
struct strbuf sb = STRBUF_INIT;
int save_errno = errno;
strbuf_git_path(&sb, "logs/%s", refname);
files_reflog_path(refs, &sb, refname);
strbuf_addf(err, "unable to append to '%s': %s",
sb.buf, strerror(save_errno));
strbuf_release(&sb);
@ -2913,7 +2934,7 @@ static int files_log_ref_write(const char *refname, const unsigned char *old_sha
struct strbuf sb = STRBUF_INIT;
int save_errno = errno;
strbuf_git_path(&sb, "logs/%s", refname);
files_reflog_path(refs, &sb, refname);
strbuf_addf(err, "unable to append to '%s': %s",
sb.buf, strerror(save_errno));
strbuf_release(&sb);
@ -2974,7 +2995,8 @@ static int commit_ref_update(struct files_ref_store *refs,
files_assert_main_repository(refs, "commit_ref_update");
clear_loose_ref_cache(refs);
if (files_log_ref_write(lock->ref_name, lock->old_oid.hash, sha1,
if (files_log_ref_write(refs, lock->ref_name,
lock->old_oid.hash, sha1,
logmsg, 0, err)) {
char *old_msg = strbuf_detach(err, NULL);
strbuf_addf(err, "cannot update the ref '%s': %s",
@ -3006,8 +3028,9 @@ static int commit_ref_update(struct files_ref_store *refs,
if (head_ref && (head_flag & REF_ISSYMREF) &&
!strcmp(head_ref, lock->ref_name)) {
struct strbuf log_err = STRBUF_INIT;
if (files_log_ref_write("HEAD", lock->old_oid.hash, sha1,
logmsg, 0, &log_err)) {
if (files_log_ref_write(refs, "HEAD",
lock->old_oid.hash, sha1,
logmsg, 0, &log_err)) {
error("%s", log_err.buf);
strbuf_release(&log_err);
}
@ -3039,24 +3062,26 @@ static int create_ref_symlink(struct ref_lock *lock, const char *target)
return ret;
}
static void update_symref_reflog(struct ref_lock *lock, const char *refname,
static void update_symref_reflog(struct files_ref_store *refs,
struct ref_lock *lock, const char *refname,
const char *target, const char *logmsg)
{
struct strbuf err = STRBUF_INIT;
unsigned char new_sha1[20];
if (logmsg && !read_ref(target, new_sha1) &&
files_log_ref_write(refname, lock->old_oid.hash, new_sha1,
logmsg, 0, &err)) {
files_log_ref_write(refs, refname, lock->old_oid.hash,
new_sha1, logmsg, 0, &err)) {
error("%s", err.buf);
strbuf_release(&err);
}
}
static int create_symref_locked(struct ref_lock *lock, const char *refname,
static int create_symref_locked(struct files_ref_store *refs,
struct ref_lock *lock, const char *refname,
const char *target, const char *logmsg)
{
if (prefer_symlink_refs && !create_ref_symlink(lock, target)) {
update_symref_reflog(lock, refname, target, logmsg);
update_symref_reflog(refs, lock, refname, target, logmsg);
return 0;
}
@ -3064,7 +3089,7 @@ static int create_symref_locked(struct ref_lock *lock, const char *refname,
return error("unable to fdopen %s: %s",
lock->lk->tempfile.filename.buf, strerror(errno));
update_symref_reflog(lock, refname, target, logmsg);
update_symref_reflog(refs, lock, refname, target, logmsg);
/* no error check; commit_ref will check ferror */
fprintf(lock->lk->tempfile.fp, "ref: %s\n", target);
@ -3093,13 +3118,20 @@ static int files_create_symref(struct ref_store *ref_store,
return -1;
}
ret = create_symref_locked(lock, refname, target, logmsg);
ret = create_symref_locked(refs, lock, refname, target, logmsg);
unlock_ref(lock);
return ret;
}
int set_worktree_head_symref(const char *gitdir, const char *target, const char *logmsg)
{
/*
* FIXME: this obviously will not work well for future refs
* backends. This function needs to die.
*/
struct files_ref_store *refs =
files_downcast(get_ref_store(NULL), 0, "set_head_symref");
static struct lock_file head_lock;
struct ref_lock *lock;
struct strbuf head_path = STRBUF_INIT;
@ -3126,7 +3158,7 @@ int set_worktree_head_symref(const char *gitdir, const char *target, const char
lock->lk = &head_lock;
lock->ref_name = xstrdup(head_rel);
ret = create_symref_locked(lock, head_rel, target, logmsg);
ret = create_symref_locked(refs, lock, head_rel, target, logmsg);
unlock_ref(lock); /* will free lock */
strbuf_release(&head_path);
@ -3136,14 +3168,13 @@ int set_worktree_head_symref(const char *gitdir, const char *target, const char
static int files_reflog_exists(struct ref_store *ref_store,
const char *refname)
{
struct files_ref_store *refs =
files_downcast(ref_store, 0, "reflog_exists");
struct strbuf sb = STRBUF_INIT;
struct stat st;
int ret;
/* Check validity (but we don't need the result): */
files_downcast(ref_store, 0, "reflog_exists");
strbuf_git_path(&sb, "logs/%s", refname);
files_reflog_path(refs, &sb, refname);
ret = !lstat(sb.buf, &st) && S_ISREG(st.st_mode);
strbuf_release(&sb);
return ret;
@ -3152,13 +3183,12 @@ static int files_reflog_exists(struct ref_store *ref_store,
static int files_delete_reflog(struct ref_store *ref_store,
const char *refname)
{
struct files_ref_store *refs =
files_downcast(ref_store, 0, "delete_reflog");
struct strbuf sb = STRBUF_INIT;
int ret;
/* Check validity (but we don't need the result): */
files_downcast(ref_store, 0, "delete_reflog");
strbuf_git_path(&sb, "logs/%s", refname);
files_reflog_path(refs, &sb, refname);
ret = remove_path(sb.buf);
strbuf_release(&sb);
return ret;
@ -3209,15 +3239,14 @@ static int files_for_each_reflog_ent_reverse(struct ref_store *ref_store,
each_reflog_ent_fn fn,
void *cb_data)
{
struct files_ref_store *refs =
files_downcast(ref_store, 0, "for_each_reflog_ent_reverse");
struct strbuf sb = STRBUF_INIT;
FILE *logfp;
long pos;
int ret = 0, at_tail = 1;
/* Check validity (but we don't need the result): */
files_downcast(ref_store, 0, "for_each_reflog_ent_reverse");
strbuf_git_path(&sb, "logs/%s", refname);
files_reflog_path(refs, &sb, refname);
logfp = fopen(sb.buf, "r");
strbuf_release(&sb);
if (!logfp)
@ -3318,14 +3347,13 @@ static int files_for_each_reflog_ent(struct ref_store *ref_store,
const char *refname,
each_reflog_ent_fn fn, void *cb_data)
{
struct files_ref_store *refs =
files_downcast(ref_store, 0, "for_each_reflog_ent");
FILE *logfp;
struct strbuf sb = STRBUF_INIT;
int ret = 0;
/* Check validity (but we don't need the result): */
files_downcast(ref_store, 0, "for_each_reflog_ent");
strbuf_git_path(&sb, "logs/%s", refname);
files_reflog_path(refs, &sb, refname);
logfp = fopen(sb.buf, "r");
strbuf_release(&sb);
if (!logfp)
@ -3407,15 +3435,14 @@ static struct ref_iterator_vtable files_reflog_iterator_vtable = {
static struct ref_iterator *files_reflog_iterator_begin(struct ref_store *ref_store)
{
struct files_ref_store *refs =
files_downcast(ref_store, 0, "reflog_iterator_begin");
struct files_reflog_iterator *iter = xcalloc(1, sizeof(*iter));
struct ref_iterator *ref_iterator = &iter->base;
struct strbuf sb = STRBUF_INIT;
/* Check validity (but we don't need the result): */
files_downcast(ref_store, 0, "reflog_iterator_begin");
base_ref_iterator_init(ref_iterator, &files_reflog_iterator_vtable);
strbuf_git_path(&sb, "logs");
files_reflog_path(refs, &sb, NULL);
iter->dir_iterator = dir_iterator_begin(sb.buf);
strbuf_release(&sb);
return ref_iterator;
@ -3840,7 +3867,8 @@ static int files_transaction_commit(struct ref_store *ref_store,
if (update->flags & REF_NEEDS_COMMIT ||
update->flags & REF_LOG_ONLY) {
if (files_log_ref_write(lock->ref_name,
if (files_log_ref_write(refs,
lock->ref_name,
lock->old_oid.hash,
update->new_sha1,
update->msg, update->flags,
@ -3900,9 +3928,9 @@ static int files_transaction_commit(struct ref_store *ref_store,
/* Delete the reflogs of any references that were deleted: */
for_each_string_list_item(ref_to_delete, &refs_to_delete) {
strbuf_reset(&sb);
strbuf_git_path(&sb, "logs/%s", ref_to_delete->string);
files_reflog_path(refs, &sb, ref_to_delete->string);
if (!unlink_or_warn(sb.buf))
try_remove_empty_parents(ref_to_delete->string,
try_remove_empty_parents(refs, ref_to_delete->string,
REMOVE_EMPTY_PARENTS_REFLOG);
}
@ -3926,7 +3954,7 @@ cleanup:
* can only work because we have already
* removed the lockfile.)
*/
try_remove_empty_parents(update->refname,
try_remove_empty_parents(refs, update->refname,
REMOVE_EMPTY_PARENTS_REF);
}
}
@ -4077,6 +4105,7 @@ static int files_reflog_expire(struct ref_store *ref_store,
static struct lock_file reflog_lock;
struct expire_reflog_cb cb;
struct ref_lock *lock;
struct strbuf log_file_sb = STRBUF_INIT;
char *log_file;
int status = 0;
int type;
@ -4105,7 +4134,8 @@ static int files_reflog_expire(struct ref_store *ref_store,
return 0;
}
log_file = git_pathdup("logs/%s", refname);
files_reflog_path(refs, &log_file_sb, refname);
log_file = strbuf_detach(&log_file_sb, NULL);
if (!(flags & EXPIRE_REFLOGS_DRY_RUN)) {
/*
* Even though holding $GIT_DIR/logs/$reflog.lock has