diff options
Diffstat (limited to 'refs/files-backend.c')
| -rw-r--r-- | refs/files-backend.c | 935 |
1 files changed, 559 insertions, 376 deletions
diff --git a/refs/files-backend.c b/refs/files-backend.c index c041d4ba2..c9d900fd1 100644 --- a/refs/files-backend.c +++ b/refs/files-backend.c @@ -165,6 +165,10 @@ 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(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); static struct ref_dir *get_ref_dir(struct ref_entry *entry) { @@ -912,6 +916,12 @@ struct packed_ref_cache { */ struct files_ref_store { struct ref_store base; + unsigned int store_flags; + + char *gitdir; + char *gitcommondir; + char *packed_refs_path; + struct ref_entry *loose; struct packed_ref_cache *packed; }; @@ -967,34 +977,61 @@ static void clear_loose_ref_cache(struct files_ref_store *refs) * Create a new submodule ref cache and add it to the internal * set of caches. */ -static struct ref_store *files_ref_store_create(const char *submodule) +static struct ref_store *files_ref_store_create(const char *gitdir, + unsigned int flags) { struct files_ref_store *refs = xcalloc(1, sizeof(*refs)); struct ref_store *ref_store = (struct ref_store *)refs; + struct strbuf sb = STRBUF_INIT; - base_ref_store_init(ref_store, &refs_be_files, submodule); + base_ref_store_init(ref_store, &refs_be_files); + refs->store_flags = flags; + + refs->gitdir = xstrdup(gitdir); + get_common_dir_noenv(&sb, gitdir); + refs->gitcommondir = strbuf_detach(&sb, NULL); + strbuf_addf(&sb, "%s/packed-refs", refs->gitcommondir); + refs->packed_refs_path = strbuf_detach(&sb, NULL); return ref_store; } /* + * Die if refs is not the main ref store. caller is used in any + * necessary error messages. + */ +static void files_assert_main_repository(struct files_ref_store *refs, + const char *caller) +{ + if (refs->store_flags & REF_STORE_MAIN) + return; + + die("BUG: operation %s only allowed for main ref store", caller); +} + +/* * Downcast ref_store to files_ref_store. Die if ref_store is not a - * files_ref_store. If submodule_allowed is not true, then also die if - * files_ref_store is for a submodule (i.e., not for the main - * repository). caller is used in any necessary error messages. + * files_ref_store. required_flags is compared with ref_store's + * store_flags to ensure the ref_store has all required capabilities. + * "caller" is used in any necessary error messages. */ -static struct files_ref_store *files_downcast( - struct ref_store *ref_store, int submodule_allowed, - const char *caller) +static struct files_ref_store *files_downcast(struct ref_store *ref_store, + unsigned int required_flags, + const char *caller) { + struct files_ref_store *refs; + if (ref_store->be != &refs_be_files) die("BUG: ref_store is type \"%s\" not \"files\" in %s", ref_store->be->name, caller); - if (!submodule_allowed) - assert_main_repository(ref_store, caller); + refs = (struct files_ref_store *)ref_store; + + if ((refs->store_flags & required_flags) != required_flags) + die("BUG: operation %s requires abilities 0x%x, but only have 0x%x", + caller, required_flags, refs->store_flags); - return (struct files_ref_store *)ref_store; + return refs; } /* The length of a peeled reference line in packed-refs, including EOL: */ @@ -1125,19 +1162,63 @@ static void read_packed_refs(FILE *f, struct ref_dir *dir) strbuf_release(&line); } +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) { + /* + * FIXME: of course this is wrong in multi worktree + * setting. To be fixed real soon. + */ + strbuf_addf(sb, "%s/logs", refs->gitcommondir); + return; + } + + switch (ref_type(refname)) { + case REF_TYPE_PER_WORKTREE: + case REF_TYPE_PSEUDOREF: + strbuf_addf(sb, "%s/logs/%s", refs->gitdir, refname); + break; + case REF_TYPE_NORMAL: + strbuf_addf(sb, "%s/logs/%s", refs->gitcommondir, refname); + break; + default: + die("BUG: unknown ref type %d of ref %s", + ref_type(refname), refname); + } +} + +static void files_ref_path(struct files_ref_store *refs, + struct strbuf *sb, + const char *refname) +{ + switch (ref_type(refname)) { + case REF_TYPE_PER_WORKTREE: + case REF_TYPE_PSEUDOREF: + strbuf_addf(sb, "%s/%s", refs->gitdir, refname); + break; + case REF_TYPE_NORMAL: + strbuf_addf(sb, "%s/%s", refs->gitcommondir, refname); + break; + default: + die("BUG: unknown ref type %d of ref %s", + ref_type(refname), refname); + } +} + /* * Get the packed_ref_cache for the specified files_ref_store, * creating it if necessary. */ static struct packed_ref_cache *get_packed_ref_cache(struct files_ref_store *refs) { - char *packed_refs_file; - - if (*refs->base.submodule) - packed_refs_file = git_pathdup_submodule(refs->base.submodule, - "packed-refs"); - else - packed_refs_file = git_pathdup("packed-refs"); + const char *packed_refs_file = files_packed_refs_path(refs); if (refs->packed && !stat_validity_check(&refs->packed->validity, packed_refs_file)) @@ -1156,7 +1237,6 @@ static struct packed_ref_cache *get_packed_ref_cache(struct files_ref_store *ref fclose(f); } } - free(packed_refs_file); return refs->packed; } @@ -1201,19 +1281,10 @@ static void read_loose_refs(const char *dirname, struct ref_dir *dir) struct strbuf refname; struct strbuf path = STRBUF_INIT; size_t path_baselen; - int err = 0; - if (*refs->base.submodule) - err = strbuf_git_path_submodule(&path, refs->base.submodule, "%s", dirname); - else - strbuf_git_path(&path, "%s", dirname); + files_ref_path(refs, &path, dirname); path_baselen = path.len; - if (err) { - strbuf_release(&path); - return; - } - d = opendir(path.buf); if (!d) { strbuf_release(&path); @@ -1242,20 +1313,10 @@ static void read_loose_refs(const char *dirname, struct ref_dir *dir) create_dir_entry(refs, refname.buf, refname.len, 1)); } else { - int read_ok; - - if (*refs->base.submodule) { - hashclr(sha1); - flag = 0; - read_ok = !resolve_gitlink_ref(refs->base.submodule, - refname.buf, sha1); - } else { - read_ok = !read_ref_full(refname.buf, - RESOLVE_REF_READING, - sha1, &flag); - } - - if (!read_ok) { + if (!refs_resolve_ref_unsafe(&refs->base, + refname.buf, + RESOLVE_REF_READING, + sha1, &flag)) { hashclr(sha1); flag |= REF_ISBROKEN; } else if (is_null_sha1(sha1)) { @@ -1344,7 +1405,7 @@ static int files_read_raw_ref(struct ref_store *ref_store, struct strbuf *referent, unsigned int *type) { struct files_ref_store *refs = - files_downcast(ref_store, 1, "read_raw_ref"); + files_downcast(ref_store, REF_STORE_READ, "read_raw_ref"); struct strbuf sb_contents = STRBUF_INIT; struct strbuf sb_path = STRBUF_INIT; const char *path; @@ -1358,10 +1419,7 @@ static int files_read_raw_ref(struct ref_store *ref_store, *type = 0; strbuf_reset(&sb_path); - if (*refs->base.submodule) - strbuf_git_path_submodule(&sb_path, refs->base.submodule, "%s", refname); - else - strbuf_git_path(&sb_path, "%s", refname); + files_ref_path(refs, &sb_path, refname); path = sb_path.buf; @@ -1540,7 +1598,7 @@ static int lock_raw_ref(struct files_ref_store *refs, int ret = TRANSACTION_GENERIC_ERROR; assert(err); - assert_main_repository(&refs->base, "lock_raw_ref"); + files_assert_main_repository(refs, "lock_raw_ref"); *type = 0; @@ -1549,7 +1607,7 @@ static int lock_raw_ref(struct files_ref_store *refs, *lock_p = lock = xcalloc(1, sizeof(*lock)); lock->ref_name = xstrdup(refname); - strbuf_git_path(&ref_file, "%s", refname); + files_ref_path(refs, &ref_file, refname); retry: switch (safe_create_leading_directories(ref_file.buf)) { @@ -1564,7 +1622,8 @@ retry: * another reference such as "refs/foo". There is no * reason to expect this error to be transitory. */ - if (verify_refname_available(refname, extras, skip, err)) { + if (refs_verify_refname_available(&refs->base, refname, + extras, skip, err)) { if (mustexist) { /* * To the user the relevant error is @@ -1764,7 +1823,9 @@ static enum peel_status peel_entry(struct ref_entry *entry, int repeel) static int files_peel_ref(struct ref_store *ref_store, const char *refname, unsigned char *sha1) { - struct files_ref_store *refs = files_downcast(ref_store, 0, "peel_ref"); + struct files_ref_store *refs = + files_downcast(ref_store, REF_STORE_READ | REF_STORE_ODB, + "peel_ref"); int flag; unsigned char base[20]; @@ -1777,7 +1838,8 @@ static int files_peel_ref(struct ref_store *ref_store, return 0; } - if (read_ref_full(refname, RESOLVE_REF_READING, base, &flag)) + if (refs_read_ref_full(ref_store, refname, + RESOLVE_REF_READING, base, &flag)) return -1; /* @@ -1872,21 +1934,21 @@ static struct ref_iterator *files_ref_iterator_begin( struct ref_store *ref_store, const char *prefix, unsigned int flags) { - struct files_ref_store *refs = - files_downcast(ref_store, 1, "ref_iterator_begin"); + struct files_ref_store *refs; struct ref_dir *loose_dir, *packed_dir; struct ref_iterator *loose_iter, *packed_iter; struct files_ref_iterator *iter; struct ref_iterator *ref_iterator; - if (!refs) - return empty_ref_iterator_begin(); - if (ref_paranoia < 0) ref_paranoia = git_env_bool("GIT_REF_PARANOIA", 0); if (ref_paranoia) flags |= DO_FOR_EACH_INCLUDE_BROKEN; + refs = files_downcast(ref_store, + REF_STORE_READ | (ref_paranoia ? 0 : REF_STORE_ODB), + "ref_iterator_begin"); + iter = xcalloc(1, sizeof(*iter)); ref_iterator = &iter->base; base_ref_iterator_init(ref_iterator, &files_ref_iterator_vtable); @@ -1945,15 +2007,15 @@ static struct ref_iterator *files_ref_iterator_begin( * on success. On error, write an error message to err, set errno, and * return a negative value. */ -static int verify_lock(struct ref_lock *lock, +static int verify_lock(struct ref_store *ref_store, struct ref_lock *lock, const unsigned char *old_sha1, int mustexist, struct strbuf *err) { assert(err); - if (read_ref_full(lock->ref_name, - mustexist ? RESOLVE_REF_READING : 0, - lock->old_oid.hash, NULL)) { + if (refs_read_ref_full(ref_store, lock->ref_name, + mustexist ? RESOLVE_REF_READING : 0, + lock->old_oid.hash, NULL)) { if (old_sha1) { int save_errno = errno; strbuf_addf(err, "can't verify ref '%s'", lock->ref_name); @@ -1985,6 +2047,13 @@ static int remove_empty_directories(struct strbuf *path) return remove_dir_recursively(path, REMOVE_DIR_EMPTY_ONLY); } +static int create_reflock(const char *path, void *cb) +{ + struct lock_file *lk = cb; + + return hold_lock_file_for_update(lk, path, LOCK_NO_DEREF) < 0 ? -1 : 0; +} + /* * Locks a ref returning the lock on success and NULL on failure. * On failure errno is set to something meaningful. @@ -2000,13 +2069,11 @@ static struct ref_lock *lock_ref_sha1_basic(struct files_ref_store *refs, struct strbuf ref_file = STRBUF_INIT; struct ref_lock *lock; int last_errno = 0; - int lflags = LOCK_NO_DEREF; int mustexist = (old_sha1 && !is_null_sha1(old_sha1)); int resolve_flags = RESOLVE_REF_NO_RECURSE; - int attempts_remaining = 3; int resolved; - assert_main_repository(&refs->base, "lock_ref_sha1_basic"); + files_assert_main_repository(refs, "lock_ref_sha1_basic"); assert(err); lock = xcalloc(1, sizeof(struct ref_lock)); @@ -2016,9 +2083,10 @@ static struct ref_lock *lock_ref_sha1_basic(struct files_ref_store *refs, if (flags & REF_DELETING) resolve_flags |= RESOLVE_REF_ALLOW_BAD_NAME; - strbuf_git_path(&ref_file, "%s", refname); - resolved = !!resolve_ref_unsafe(refname, resolve_flags, - lock->old_oid.hash, type); + files_ref_path(refs, &ref_file, refname); + resolved = !!refs_resolve_ref_unsafe(&refs->base, + refname, resolve_flags, + lock->old_oid.hash, type); if (!resolved && errno == EISDIR) { /* * we are trying to lock foo but we used to @@ -2035,8 +2103,9 @@ static struct ref_lock *lock_ref_sha1_basic(struct files_ref_store *refs, refname); goto error_return; } - resolved = !!resolve_ref_unsafe(refname, resolve_flags, - lock->old_oid.hash, type); + resolved = !!refs_resolve_ref_unsafe(&refs->base, + refname, resolve_flags, + lock->old_oid.hash, type); } if (!resolved) { last_errno = errno; @@ -2068,36 +2137,13 @@ static struct ref_lock *lock_ref_sha1_basic(struct files_ref_store *refs, lock->ref_name = xstrdup(refname); - retry: - switch (safe_create_leading_directories_const(ref_file.buf)) { - case SCLD_OK: - break; /* success */ - case SCLD_VANISHED: - if (--attempts_remaining > 0) - goto retry; - /* fall through */ - default: + if (raceproof_create_file(ref_file.buf, create_reflock, lock->lk)) { last_errno = errno; - strbuf_addf(err, "unable to create directory for '%s'", - ref_file.buf); + unable_to_lock_message(ref_file.buf, errno, err); goto error_return; } - if (hold_lock_file_for_update(lock->lk, ref_file.buf, lflags) < 0) { - last_errno = errno; - if (errno == ENOENT && --attempts_remaining > 0) - /* - * Maybe somebody just deleted one of the - * directories leading to ref_file. Try - * again: - */ - goto retry; - else { - unable_to_lock_message(ref_file.buf, errno, err); - goto error_return; - } - } - if (verify_lock(lock, old_sha1, mustexist, err)) { + if (verify_lock(&refs->base, lock, old_sha1, mustexist, err)) { last_errno = errno; goto error_return; } @@ -2152,7 +2198,7 @@ static int lock_packed_refs(struct files_ref_store *refs, int flags) static int timeout_value = 1000; struct packed_ref_cache *packed_ref_cache; - assert_main_repository(&refs->base, "lock_packed_refs"); + files_assert_main_repository(refs, "lock_packed_refs"); if (!timeout_configured) { git_config_get_int("core.packedrefstimeout", &timeout_value); @@ -2160,7 +2206,7 @@ static int lock_packed_refs(struct files_ref_store *refs, int flags) } if (hold_lock_file_for_update_timeout( - &packlock, git_path("packed-refs"), + &packlock, files_packed_refs_path(refs), flags, timeout_value) < 0) return -1; /* @@ -2190,7 +2236,7 @@ static int commit_packed_refs(struct files_ref_store *refs) int save_errno = 0; FILE *out; - assert_main_repository(&refs->base, "commit_packed_refs"); + files_assert_main_repository(refs, "commit_packed_refs"); if (!packed_ref_cache->lock) die("internal error: packed-refs not locked"); @@ -2223,7 +2269,7 @@ static void rollback_packed_refs(struct files_ref_store *refs) struct packed_ref_cache *packed_ref_cache = get_packed_ref_cache(refs); - assert_main_repository(&refs->base, "rollback_packed_refs"); + files_assert_main_repository(refs, "rollback_packed_refs"); if (!packed_ref_cache->lock) die("internal error: packed-refs not locked"); @@ -2298,15 +2344,28 @@ 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. - * Note: munges *name. + * 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(char *name) +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; char *p, *q; int i; - p = name; + + strbuf_addstr(&buf, refname); + p = buf.buf; for (i = 0; i < 2; i++) { /* refs/{heads,tags,...}/ */ while (*p && *p != '/') p++; @@ -2314,23 +2373,32 @@ static void try_remove_empty_parents(char *name) while (*p == '/') p++; } - for (q = p; *q; q++) - ; - while (1) { + q = buf.buf + buf.len; + while (flags & (REMOVE_EMPTY_PARENTS_REF | REMOVE_EMPTY_PARENTS_REFLOG)) { while (q > p && *q != '/') q--; while (q > p && *(q-1) == '/') q--; if (q == p) break; - *q = '\0'; - if (rmdir(git_path("%s", name))) - break; + strbuf_setlen(&buf, q - buf.buf); + + strbuf_reset(&sb); + files_ref_path(refs, &sb, buf.buf); + if ((flags & REMOVE_EMPTY_PARENTS_REF) && rmdir(sb.buf)) + flags &= ~REMOVE_EMPTY_PARENTS_REF; + + strbuf_reset(&sb); + files_reflog_path(refs, &sb, buf.buf); + if ((flags & REMOVE_EMPTY_PARENTS_REFLOG) && rmdir(sb.buf)) + flags &= ~REMOVE_EMPTY_PARENTS_REFLOG; } + strbuf_release(&buf); + strbuf_release(&sb); } /* make sure nobody touched the ref, and unlink */ -static void prune_ref(struct ref_to_prune *r) +static void prune_ref(struct files_ref_store *refs, struct ref_to_prune *r) { struct ref_transaction *transaction; struct strbuf err = STRBUF_INIT; @@ -2338,7 +2406,7 @@ static void prune_ref(struct ref_to_prune *r) if (check_refname_format(r->name, 0)) return; - transaction = ref_transaction_begin(&err); + transaction = ref_store_transaction_begin(&refs->base, &err); if (!transaction || ref_transaction_delete(transaction, r->name, r->sha1, REF_ISPRUNING | REF_NODEREF, NULL, &err) || @@ -2350,13 +2418,12 @@ static void prune_ref(struct ref_to_prune *r) } ref_transaction_free(transaction); strbuf_release(&err); - try_remove_empty_parents(r->name); } -static void prune_refs(struct ref_to_prune *r) +static void prune_refs(struct files_ref_store *refs, struct ref_to_prune *r) { while (r) { - prune_ref(r); + prune_ref(refs, r); r = r->next; } } @@ -2364,7 +2431,8 @@ static void prune_refs(struct ref_to_prune *r) static int files_pack_refs(struct ref_store *ref_store, unsigned int flags) { struct files_ref_store *refs = - files_downcast(ref_store, 0, "pack_refs"); + files_downcast(ref_store, REF_STORE_WRITE | REF_STORE_ODB, + "pack_refs"); struct pack_refs_cb_data cbdata; memset(&cbdata, 0, sizeof(cbdata)); @@ -2379,7 +2447,7 @@ static int files_pack_refs(struct ref_store *ref_store, unsigned int flags) if (commit_packed_refs(refs)) die_errno("unable to overwrite old ref-pack file"); - prune_refs(cbdata.ref_to_prune); + prune_refs(refs, cbdata.ref_to_prune); return 0; } @@ -2397,7 +2465,7 @@ static int repack_without_refs(struct files_ref_store *refs, struct string_list_item *refname; int ret, needs_repacking = 0, removed = 0; - assert_main_repository(&refs->base, "repack_without_refs"); + files_assert_main_repository(refs, "repack_without_refs"); assert(err); /* Look for a packed ref */ @@ -2413,7 +2481,7 @@ static int repack_without_refs(struct files_ref_store *refs, return 0; /* no refname exists in packed refs */ if (lock_packed_refs(refs, 0)) { - unable_to_lock_message(git_path("packed-refs"), errno, err); + unable_to_lock_message(files_packed_refs_path(refs), errno, err); return -1; } packed = get_packed_refs(refs); @@ -2439,29 +2507,11 @@ static int repack_without_refs(struct files_ref_store *refs, return ret; } -static int delete_ref_loose(struct ref_lock *lock, int flag, struct strbuf *err) -{ - assert(err); - - if (!(flag & REF_ISPACKED) || flag & REF_ISSYMREF) { - /* - * loose. The loose file name is the same as the - * lockfile name, minus ".lock": - */ - char *loose_filename = get_locked_file_path(lock->lk); - int res = unlink_or_msg(loose_filename, err); - free(loose_filename); - if (res) - return 1; - } - return 0; -} - static int files_delete_refs(struct ref_store *ref_store, struct string_list *refnames, unsigned int flags) { struct files_ref_store *refs = - files_downcast(ref_store, 0, "delete_refs"); + files_downcast(ref_store, REF_STORE_WRITE, "delete_refs"); struct strbuf err = STRBUF_INIT; int i, result = 0; @@ -2489,7 +2539,7 @@ static int files_delete_refs(struct ref_store *ref_store, for (i = 0; i < refnames->nr; i++) { const char *refname = refnames->items[i].string; - if (delete_ref(refname, NULL, flags)) + if (refs_delete_ref(&refs->base, NULL, refname, NULL, flags)) result |= error(_("could not remove reference %s"), refname); } @@ -2505,57 +2555,56 @@ out: * 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" +#define TMP_RENAMED_LOG "refs/.tmp-renamed-log" + +struct rename_cb { + const char *tmp_renamed_log; + int true_errno; +}; -static int rename_tmp_log(const char *newrefname) +static int rename_tmp_log_callback(const char *path, void *cb_data) { - int attempts_remaining = 4; - struct strbuf path = STRBUF_INIT; - int ret = -1; + struct rename_cb *cb = cb_data; - retry: - strbuf_reset(&path); - strbuf_git_path(&path, "logs/%s", newrefname); - switch (safe_create_leading_directories_const(path.buf)) { - case SCLD_OK: - break; /* success */ - case SCLD_VANISHED: - if (--attempts_remaining > 0) - goto retry; - /* fall through */ - default: - error("unable to create directory for %s", newrefname); - goto out; + if (rename(cb->tmp_renamed_log, path)) { + /* + * rename(a, b) when b is an existing directory ought + * to result in ISDIR, but Solaris 5.8 gives ENOTDIR. + * Sheesh. Record the true errno for error reporting, + * but report EISDIR to raceproof_create_file() so + * that it knows to retry. + */ + cb->true_errno = errno; + if (errno == ENOTDIR) + errno = EISDIR; + return -1; + } else { + return 0; } +} - if (rename(git_path(TMP_RENAMED_LOG), path.buf)) { - if ((errno==EISDIR || errno==ENOTDIR) && --attempts_remaining > 0) { - /* - * rename(a, b) when b is an existing - * directory ought to result in ISDIR, but - * Solaris 5.8 gives ENOTDIR. Sheesh. - */ - if (remove_empty_directories(&path)) { - error("Directory not empty: logs/%s", newrefname); - goto out; - } - goto retry; - } else if (errno == ENOENT && --attempts_remaining > 0) { - /* - * Maybe another process just deleted one of - * the directories in the path to newrefname. - * Try again from the beginning. - */ - goto retry; - } else { - error("unable to move logfile "TMP_RENAMED_LOG" to logs/%s: %s", - newrefname, strerror(errno)); - goto out; - } +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; + + 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) { + if (errno == EISDIR) + error("directory not empty: %s", path.buf); + else + error("unable to move logfile %s to %s: %s", + tmp.buf, path.buf, + strerror(cb.true_errno)); } - ret = 0; -out: + strbuf_release(&path); + strbuf_release(&tmp); return ret; } @@ -2566,7 +2615,7 @@ static int files_verify_refname_available(struct ref_store *ref_store, struct strbuf *err) { struct files_ref_store *refs = - files_downcast(ref_store, 1, "verify_refname_available"); + files_downcast(ref_store, REF_STORE_READ, "verify_refname_available"); struct ref_dir *packed_refs = get_packed_refs(refs); struct ref_dir *loose_refs = get_loose_refs(refs); @@ -2591,32 +2640,52 @@ static int files_rename_ref(struct ref_store *ref_store, const char *logmsg) { struct files_ref_store *refs = - files_downcast(ref_store, 0, "rename_ref"); + files_downcast(ref_store, REF_STORE_WRITE, "rename_ref"); unsigned char sha1[20], orig_sha1[20]; int flag = 0, logmoved = 0; struct ref_lock *lock; struct stat loginfo; - int log = !lstat(git_path("logs/%s", oldrefname), &loginfo); + struct strbuf sb_oldref = STRBUF_INIT; + struct strbuf sb_newref = STRBUF_INIT; + struct strbuf tmp_renamed_log = STRBUF_INIT; + int log, ret; struct strbuf err = STRBUF_INIT; - if (log && S_ISLNK(loginfo.st_mode)) - return error("reflog for %s is a symlink", oldrefname); + files_reflog_path(refs, &sb_oldref, oldrefname); + files_reflog_path(refs, &sb_newref, newrefname); + files_reflog_path(refs, &tmp_renamed_log, TMP_RENAMED_LOG); - if (!resolve_ref_unsafe(oldrefname, RESOLVE_REF_READING | RESOLVE_REF_NO_RECURSE, - orig_sha1, &flag)) - return error("refname %s not found", oldrefname); + log = !lstat(sb_oldref.buf, &loginfo); + if (log && S_ISLNK(loginfo.st_mode)) { + ret = error("reflog for %s is a symlink", oldrefname); + goto out; + } - if (flag & REF_ISSYMREF) - return error("refname %s is a symbolic ref, renaming it is not supported", - oldrefname); - if (!rename_ref_available(oldrefname, newrefname)) - return 1; + if (!refs_resolve_ref_unsafe(&refs->base, oldrefname, + RESOLVE_REF_READING | RESOLVE_REF_NO_RECURSE, + orig_sha1, &flag)) { + ret = error("refname %s not found", oldrefname); + goto out; + } - if (log && rename(git_path("logs/%s", oldrefname), git_path(TMP_RENAMED_LOG))) - return error("unable to move logfile logs/%s to "TMP_RENAMED_LOG": %s", - oldrefname, strerror(errno)); + if (flag & REF_ISSYMREF) { + ret = error("refname %s is a symbolic ref, renaming it is not supported", + oldrefname); + goto out; + } + if (!refs_rename_ref_available(&refs->base, oldrefname, newrefname)) { + ret = 1; + goto out; + } + + if (log && rename(sb_oldref.buf, tmp_renamed_log.buf)) { + ret = error("unable to move logfile logs/%s to logs/"TMP_RENAMED_LOG": %s", + oldrefname, strerror(errno)); + goto out; + } - if (delete_ref(oldrefname, orig_sha1, REF_NODEREF)) { + if (refs_delete_ref(&refs->base, logmsg, oldrefname, + orig_sha1, REF_NODEREF)) { error("unable to delete old %s", oldrefname); goto rollback; } @@ -2628,14 +2697,16 @@ static int files_rename_ref(struct ref_store *ref_store, * the safety anyway; we want to delete the reference whatever * its current value. */ - if (!read_ref_full(newrefname, RESOLVE_REF_READING | RESOLVE_REF_NO_RECURSE, - sha1, NULL) && - delete_ref(newrefname, NULL, REF_NODEREF)) { - if (errno==EISDIR) { + if (!refs_read_ref_full(&refs->base, newrefname, + RESOLVE_REF_READING | RESOLVE_REF_NO_RECURSE, + sha1, NULL) && + refs_delete_ref(&refs->base, NULL, newrefname, + NULL, REF_NODEREF)) { + if (errno == EISDIR) { struct strbuf path = STRBUF_INIT; int result; - strbuf_git_path(&path, "%s", newrefname); + files_ref_path(refs, &path, newrefname); result = remove_empty_directories(&path); strbuf_release(&path); @@ -2649,7 +2720,7 @@ 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; @@ -2670,7 +2741,8 @@ static int files_rename_ref(struct ref_store *ref_store, goto rollback; } - return 0; + ret = 0; + goto out; rollback: lock = lock_ref_sha1_basic(refs, oldrefname, NULL, NULL, NULL, @@ -2691,15 +2763,20 @@ static int files_rename_ref(struct ref_store *ref_store, log_all_ref_updates = flag; rollbacklog: - if (logmoved && rename(git_path("logs/%s", newrefname), git_path("logs/%s", oldrefname))) + if (logmoved && rename(sb_newref.buf, sb_oldref.buf)) error("unable to restore logfile %s from %s: %s", oldrefname, newrefname, strerror(errno)); if (!logmoved && log && - rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", oldrefname))) - error("unable to restore logfile %s from "TMP_RENAMED_LOG": %s", + rename(tmp_renamed_log.buf, sb_oldref.buf)) + error("unable to restore logfile %s from logs/"TMP_RENAMED_LOG": %s", oldrefname, strerror(errno)); + ret = 1; + out: + strbuf_release(&sb_newref); + strbuf_release(&sb_oldref); + strbuf_release(&tmp_renamed_log); - return 1; + return ret; } static int close_ref(struct ref_lock *lock) @@ -2740,66 +2817,93 @@ static int commit_ref(struct ref_lock *lock) return 0; } +static int open_or_create_logfile(const char *path, void *cb) +{ + int *fd = cb; + + *fd = open(path, O_APPEND | O_WRONLY | O_CREAT, 0666); + return (*fd < 0) ? -1 : 0; +} + /* - * Create a reflog for a ref. If force_create = 0, the reflog will - * only be created for certain refs (those for which - * should_autocreate_reflog returns non-zero. Otherwise, create it - * regardless of the ref name. Fill in *err and return -1 on failure. + * Create a reflog for a ref. If force_create = 0, only create the + * reflog for certain refs (those for which should_autocreate_reflog + * returns non-zero). Otherwise, create it regardless of the reference + * name. If the logfile already existed or was created, return 0 and + * set *logfd to the file descriptor opened for appending to the file. + * If no logfile exists and we decided not to create one, return 0 and + * set *logfd to -1. On failure, fill in *err, set *logfd to -1, and + * return -1. */ -static int log_ref_setup(const char *refname, struct strbuf *logfile, struct strbuf *err, int force_create) +static int log_ref_setup(struct files_ref_store *refs, + const char *refname, int force_create, + int *logfd, struct strbuf *err) { - int logfd, oflags = O_APPEND | O_WRONLY; + struct strbuf logfile_sb = STRBUF_INIT; + char *logfile; - strbuf_git_path(logfile, "logs/%s", refname); - if (force_create || should_autocreate_reflog(refname)) { - if (safe_create_leading_directories(logfile->buf) < 0) { - strbuf_addf(err, "unable to create directory for '%s': " - "%s", logfile->buf, strerror(errno)); - return -1; - } - oflags |= O_CREAT; - } + files_reflog_path(refs, &logfile_sb, refname); + logfile = strbuf_detach(&logfile_sb, NULL); - logfd = open(logfile->buf, oflags, 0666); - if (logfd < 0) { - if (!(oflags & O_CREAT) && (errno == ENOENT || errno == EISDIR)) - return 0; + if (force_create || should_autocreate_reflog(refname)) { + if (raceproof_create_file(logfile, open_or_create_logfile, logfd)) { + if (errno == ENOENT) + strbuf_addf(err, "unable to create directory for '%s': " + "%s", logfile, strerror(errno)); + else if (errno == EISDIR) + strbuf_addf(err, "there are still logs under '%s'", + logfile); + else + strbuf_addf(err, "unable to append to '%s': %s", + logfile, strerror(errno)); - if (errno == EISDIR) { - if (remove_empty_directories(logfile)) { - strbuf_addf(err, "there are still logs under " - "'%s'", logfile->buf); - return -1; - } - logfd = open(logfile->buf, oflags, 0666); + goto error; } - - if (logfd < 0) { - strbuf_addf(err, "unable to append to '%s': %s", - logfile->buf, strerror(errno)); - return -1; + } else { + *logfd = open(logfile, O_APPEND | O_WRONLY, 0666); + if (*logfd < 0) { + if (errno == ENOENT || errno == EISDIR) { + /* + * The logfile doesn't already exist, + * but that is not an error; it only + * means that we won't write log + * entries to it. + */ + ; + } else { + strbuf_addf(err, "unable to append to '%s': %s", + logfile, strerror(errno)); + goto error; + } } } - adjust_shared_perm(logfile->buf); - close(logfd); + if (*logfd >= 0) + adjust_shared_perm(logfile); + + free(logfile); return 0; -} +error: + free(logfile); + return -1; +} static int files_create_reflog(struct ref_store *ref_store, const char *refname, int force_create, struct strbuf *err) { - int ret; - struct strbuf sb = STRBUF_INIT; + struct files_ref_store *refs = + files_downcast(ref_store, REF_STORE_WRITE, "create_reflog"); + int fd; + + if (log_ref_setup(refs, refname, force_create, &fd, err)) + return -1; - /* Check validity (but we don't need the result): */ - files_downcast(ref_store, 0, "create_reflog"); + if (fd >= 0) + close(fd); - ret = log_ref_setup(refname, &sb, err, force_create); - strbuf_release(&sb); - return ret; + return 0; } static int log_ref_write_fd(int fd, const unsigned char *old_sha1, @@ -2828,59 +2932,51 @@ static int log_ref_write_fd(int fd, const unsigned char *old_sha1, return 0; } -static int log_ref_write_1(const char *refname, const unsigned char *old_sha1, - const unsigned char *new_sha1, const char *msg, - struct strbuf *logfile, int flags, - struct strbuf *err) +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) { - int logfd, result, oflags = O_APPEND | O_WRONLY; + int logfd, result; 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, logfile, err, flags & REF_FORCE_CREATE_REFLOG); + result = log_ref_setup(refs, refname, + flags & REF_FORCE_CREATE_REFLOG, + &logfd, err); if (result) return result; - logfd = open(logfile->buf, oflags); if (logfd < 0) return 0; result = log_ref_write_fd(logfd, old_sha1, new_sha1, git_committer_info(0), msg); if (result) { - strbuf_addf(err, "unable to append to '%s': %s", logfile->buf, - strerror(errno)); + struct strbuf sb = STRBUF_INIT; + int save_errno = errno; + + files_reflog_path(refs, &sb, refname); + strbuf_addf(err, "unable to append to '%s': %s", + sb.buf, strerror(save_errno)); + strbuf_release(&sb); close(logfd); return -1; } if (close(logfd)) { - strbuf_addf(err, "unable to append to '%s': %s", logfile->buf, - strerror(errno)); + struct strbuf sb = STRBUF_INIT; + int save_errno = errno; + + files_reflog_path(refs, &sb, refname); + strbuf_addf(err, "unable to append to '%s': %s", + sb.buf, strerror(save_errno)); + strbuf_release(&sb); return -1; } return 0; } -static int log_ref_write(const char *refname, const unsigned char *old_sha1, - const unsigned char *new_sha1, const char *msg, - int flags, struct strbuf *err) -{ - return files_log_ref_write(refname, old_sha1, new_sha1, msg, flags, - err); -} - -int files_log_ref_write(const char *refname, const unsigned char *old_sha1, - const unsigned char *new_sha1, const char *msg, - int flags, struct strbuf *err) -{ - struct strbuf sb = STRBUF_INIT; - int ret = log_ref_write_1(refname, old_sha1, new_sha1, msg, &sb, flags, - err); - strbuf_release(&sb); - return ret; -} - /* * Write sha1 into the open lockfile, then close the lockfile. On * errors, rollback the lockfile, fill in *err and @@ -2930,10 +3026,12 @@ static int commit_ref_update(struct files_ref_store *refs, const unsigned char *sha1, const char *logmsg, struct strbuf *err) { - assert_main_repository(&refs->base, "commit_ref_update"); + files_assert_main_repository(refs, "commit_ref_update"); clear_loose_ref_cache(refs); - if (log_ref_write(lock->ref_name, lock->old_oid.hash, sha1, logmsg, 0, err)) { + 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", lock->ref_name, old_msg); @@ -2959,13 +3057,15 @@ static int commit_ref_update(struct files_ref_store *refs, int head_flag; const char *head_ref; - head_ref = resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, - head_sha1, &head_flag); + head_ref = refs_resolve_ref_unsafe(&refs->base, "HEAD", + RESOLVE_REF_READING, + head_sha1, &head_flag); if (head_ref && (head_flag & REF_ISSYMREF) && !strcmp(head_ref, lock->ref_name)) { struct strbuf log_err = STRBUF_INIT; - if (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); } @@ -2997,23 +3097,28 @@ 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) && - log_ref_write(refname, lock->old_oid.hash, new_sha1, logmsg, 0, &err)) { + if (logmsg && + !refs_read_ref_full(&refs->base, target, + RESOLVE_REF_READING, new_sha1, NULL) && + 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; } @@ -3021,7 +3126,7 @@ 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); @@ -3036,7 +3141,7 @@ static int files_create_symref(struct ref_store *ref_store, const char *logmsg) { struct files_ref_store *refs = - files_downcast(ref_store, 0, "create_symref"); + files_downcast(ref_store, REF_STORE_WRITE, "create_symref"); struct strbuf err = STRBUF_INIT; struct ref_lock *lock; int ret; @@ -3050,13 +3155,22 @@ 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) +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_main_ref_store(), + REF_STORE_WRITE, + "set_head_symref"); + static struct lock_file head_lock; struct ref_lock *lock; struct strbuf head_path = STRBUF_INIT; @@ -3083,7 +3197,7 @@ int set_worktree_head_symref(const char *gitdir, const char *target) lock->lk = &head_lock; lock->ref_name = xstrdup(head_rel); - ret = create_symref_locked(lock, head_rel, target, NULL); + ret = create_symref_locked(refs, lock, head_rel, target, logmsg); unlock_ref(lock); /* will free lock */ strbuf_release(&head_path); @@ -3093,36 +3207,45 @@ int set_worktree_head_symref(const char *gitdir, const char *target) static int files_reflog_exists(struct ref_store *ref_store, const char *refname) { + struct files_ref_store *refs = + files_downcast(ref_store, REF_STORE_READ, "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"); - - return !lstat(git_path("logs/%s", refname), &st) && - S_ISREG(st.st_mode); + files_reflog_path(refs, &sb, refname); + ret = !lstat(sb.buf, &st) && S_ISREG(st.st_mode); + strbuf_release(&sb); + return ret; } static int files_delete_reflog(struct ref_store *ref_store, const char *refname) { - /* Check validity (but we don't need the result): */ - files_downcast(ref_store, 0, "delete_reflog"); + struct files_ref_store *refs = + files_downcast(ref_store, REF_STORE_WRITE, "delete_reflog"); + struct strbuf sb = STRBUF_INIT; + int ret; - return remove_path(git_path("logs/%s", refname)); + files_reflog_path(refs, &sb, refname); + ret = remove_path(sb.buf); + strbuf_release(&sb); + return ret; } static int show_one_reflog_ent(struct strbuf *sb, each_reflog_ent_fn fn, void *cb_data) { - unsigned char osha1[20], nsha1[20]; + struct object_id ooid, noid; char *email_end, *message; unsigned long timestamp; int tz; + const char *p = sb->buf; /* old SP new SP name <email> SP time TAB msg LF */ - if (sb->len < 83 || sb->buf[sb->len - 1] != '\n' || - get_sha1_hex(sb->buf, osha1) || sb->buf[40] != ' ' || - get_sha1_hex(sb->buf + 41, nsha1) || sb->buf[81] != ' ' || - !(email_end = strchr(sb->buf + 82, '>')) || + if (!sb->len || sb->buf[sb->len - 1] != '\n' || + parse_oid_hex(p, &ooid, &p) || *p++ != ' ' || + parse_oid_hex(p, &noid, &p) || *p++ != ' ' || + !(email_end = strchr(p, '>')) || email_end[1] != ' ' || !(timestamp = strtoul(email_end + 2, &message, 10)) || !message || message[0] != ' ' || @@ -3136,7 +3259,7 @@ static int show_one_reflog_ent(struct strbuf *sb, each_reflog_ent_fn fn, void *c message += 6; else message += 7; - return fn(osha1, nsha1, sb->buf + 82, timestamp, tz, message, cb_data); + return fn(&ooid, &noid, p, timestamp, tz, message, cb_data); } static char *find_beginning_of_line(char *bob, char *scan) @@ -3155,22 +3278,24 @@ 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, REF_STORE_READ, + "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"); - - logfp = fopen(git_path("logs/%s", refname), "r"); + files_reflog_path(refs, &sb, refname); + logfp = fopen(sb.buf, "r"); + strbuf_release(&sb); if (!logfp) return -1; /* Jump to the end */ if (fseek(logfp, 0, SEEK_END) < 0) - return error("cannot seek back reflog for %s: %s", - refname, strerror(errno)); + ret = error("cannot seek back reflog for %s: %s", + refname, strerror(errno)); pos = ftell(logfp); while (!ret && 0 < pos) { int cnt; @@ -3180,13 +3305,17 @@ static int files_for_each_reflog_ent_reverse(struct ref_store *ref_store, /* Fill next block from the end */ cnt = (sizeof(buf) < pos) ? sizeof(buf) : pos; - if (fseek(logfp, pos - cnt, SEEK_SET)) - return error("cannot seek back reflog for %s: %s", - refname, strerror(errno)); + if (fseek(logfp, pos - cnt, SEEK_SET)) { + ret = error("cannot seek back reflog for %s: %s", + refname, strerror(errno)); + break; + } nread = fread(buf, cnt, 1, logfp); - if (nread != 1) - return error("cannot read %d bytes from reflog for %s: %s", - cnt, refname, strerror(errno)); + if (nread != 1) { + ret = error("cannot read %d bytes from reflog for %s: %s", + cnt, refname, strerror(errno)); + break; + } pos -= cnt; scanp = endp = buf + cnt; @@ -3262,14 +3391,16 @@ 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, REF_STORE_READ, + "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"); - - logfp = fopen(git_path("logs/%s", refname), "r"); + files_reflog_path(refs, &sb, refname); + logfp = fopen(sb.buf, "r"); + strbuf_release(&sb); if (!logfp) return -1; @@ -3283,6 +3414,7 @@ static int files_for_each_reflog_ent(struct ref_store *ref_store, struct files_reflog_iterator { struct ref_iterator base; + struct ref_store *ref_store; struct dir_iterator *dir_iterator; struct object_id oid; }; @@ -3304,8 +3436,9 @@ static int files_reflog_iterator_advance(struct ref_iterator *ref_iterator) if (ends_with(diter->basename, ".lock")) continue; - if (read_ref_full(diter->relative_path, 0, - iter->oid.hash, &flags)) { + if (refs_read_ref_full(iter->ref_store, + diter->relative_path, 0, + iter->oid.hash, &flags)) { error("bad ref for %s", diter->path.buf); continue; } @@ -3349,14 +3482,18 @@ 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, REF_STORE_READ, + "reflog_iterator_begin"); struct files_reflog_iterator *iter = xcalloc(1, sizeof(*iter)); struct ref_iterator *ref_iterator = &iter->base; - - /* Check validity (but we don't need the result): */ - files_downcast(ref_store, 0, "reflog_iterator_begin"); + struct strbuf sb = STRBUF_INIT; base_ref_iterator_init(ref_iterator, &files_reflog_iterator_vtable); - iter->dir_iterator = dir_iterator_begin(git_path("logs")); + files_reflog_path(refs, &sb, NULL); + iter->dir_iterator = dir_iterator_begin(sb.buf); + iter->ref_store = ref_store; + strbuf_release(&sb); return ref_iterator; } @@ -3560,7 +3697,7 @@ static int lock_ref_for_update(struct files_ref_store *refs, int ret; struct ref_lock *lock; - assert_main_repository(&refs->base, "lock_ref_for_update"); + files_assert_main_repository(refs, "lock_ref_for_update"); if ((update->flags & REF_HAVE_NEW) && is_null_sha1(update->new_sha1)) update->flags |= REF_DELETING; @@ -3595,8 +3732,9 @@ static int lock_ref_for_update(struct files_ref_store *refs, * the transaction, so we have to read it here * to record and possibly check old_sha1: */ - if (read_ref_full(referent.buf, 0, - lock->old_oid.hash, NULL)) { + if (refs_read_ref_full(&refs->base, + referent.buf, 0, + lock->old_oid.hash, NULL)) { if (update->flags & REF_HAVE_OLD) { strbuf_addf(err, "cannot lock ref '%s': " "error reading reference", @@ -3686,7 +3824,8 @@ static int files_transaction_commit(struct ref_store *ref_store, struct strbuf *err) { struct files_ref_store *refs = - files_downcast(ref_store, 0, "ref_transaction_commit"); + files_downcast(ref_store, REF_STORE_WRITE, + "ref_transaction_commit"); int ret = 0, i; struct string_list refs_to_delete = STRING_LIST_INIT_NODUP; struct string_list_item *ref_to_delete; @@ -3694,6 +3833,7 @@ static int files_transaction_commit(struct ref_store *ref_store, char *head_ref = NULL; int head_type; struct object_id head_oid; + struct strbuf sb = STRBUF_INIT; assert(err); @@ -3748,8 +3888,9 @@ static int files_transaction_commit(struct ref_store *ref_store, * head_ref within the transaction, then split_head_update() * arranges for the reflog of HEAD to be updated, too. */ - head_ref = resolve_refdup("HEAD", RESOLVE_REF_NO_RECURSE, - head_oid.hash, &head_type); + head_ref = refs_resolve_refdup(ref_store, "HEAD", + RESOLVE_REF_NO_RECURSE, + head_oid.hash, &head_type); if (head_ref && !(head_type & REF_ISSYMREF)) { free(head_ref); @@ -3778,9 +3919,12 @@ static int files_transaction_commit(struct ref_store *ref_store, if (update->flags & REF_NEEDS_COMMIT || update->flags & REF_LOG_ONLY) { - if (log_ref_write(lock->ref_name, lock->old_oid.hash, - update->new_sha1, - update->msg, update->flags, err)) { + if (files_log_ref_write(refs, + lock->ref_name, + lock->old_oid.hash, + update->new_sha1, + update->msg, update->flags, + err)) { char *old_msg = strbuf_detach(err, NULL); strbuf_addf(err, "cannot update the ref '%s': %s", @@ -3810,9 +3954,16 @@ static int files_transaction_commit(struct ref_store *ref_store, if (update->flags & REF_DELETING && !(update->flags & REF_LOG_ONLY)) { - if (delete_ref_loose(lock, update->type, err)) { - ret = TRANSACTION_GENERIC_ERROR; - goto cleanup; + if (!(update->type & REF_ISPACKED) || + update->type & REF_ISSYMREF) { + /* It is a loose reference. */ + strbuf_reset(&sb); + files_ref_path(refs, &sb, lock->ref_name); + if (unlink_or_msg(sb.buf, err)) { + ret = TRANSACTION_GENERIC_ERROR; + goto cleanup; + } + update->flags |= REF_DELETED_LOOSE; } if (!(update->flags & REF_ISPRUNING)) @@ -3825,16 +3976,41 @@ static int files_transaction_commit(struct ref_store *ref_store, ret = TRANSACTION_GENERIC_ERROR; goto cleanup; } - for_each_string_list_item(ref_to_delete, &refs_to_delete) - unlink_or_warn(git_path("logs/%s", ref_to_delete->string)); + + /* Delete the reflogs of any references that were deleted: */ + for_each_string_list_item(ref_to_delete, &refs_to_delete) { + strbuf_reset(&sb); + files_reflog_path(refs, &sb, ref_to_delete->string); + if (!unlink_or_warn(sb.buf)) + try_remove_empty_parents(refs, ref_to_delete->string, + REMOVE_EMPTY_PARENTS_REFLOG); + } + clear_loose_ref_cache(refs); cleanup: + strbuf_release(&sb); transaction->state = REF_TRANSACTION_CLOSED; - for (i = 0; i < transaction->nr; i++) - if (transaction->updates[i]->backend_data) - unlock_ref(transaction->updates[i]->backend_data); + for (i = 0; i < transaction->nr; i++) { + struct ref_update *update = transaction->updates[i]; + struct ref_lock *lock = update->backend_data; + + if (lock) + unlock_ref(lock); + + if (update->flags & REF_DELETED_LOOSE) { + /* + * The loose reference was deleted. Delete any + * empty parent directories. (Note that this + * can only work because we have already + * removed the lockfile.) + */ + try_remove_empty_parents(refs, update->refname, + REMOVE_EMPTY_PARENTS_REF); + } + } + string_list_clear(&refs_to_delete, 0); free(head_ref); string_list_clear(&affected_refnames, 0); @@ -3855,7 +4031,8 @@ static int files_initial_transaction_commit(struct ref_store *ref_store, struct strbuf *err) { struct files_ref_store *refs = - files_downcast(ref_store, 0, "initial_ref_transaction_commit"); + files_downcast(ref_store, REF_STORE_WRITE, + "initial_ref_transaction_commit"); int ret = 0, i; struct string_list affected_refnames = STRING_LIST_INIT_NODUP; @@ -3886,7 +4063,8 @@ static int files_initial_transaction_commit(struct ref_store *ref_store, * so here we really only check that none of the references * that we are creating already exists. */ - if (for_each_rawref(ref_present, &affected_refnames)) + if (refs_for_each_rawref(&refs->base, ref_present, + &affected_refnames)) die("BUG: initial ref transaction called with existing refs"); for (i = 0; i < transaction->nr; i++) { @@ -3895,9 +4073,9 @@ static int files_initial_transaction_commit(struct ref_store *ref_store, if ((update->flags & REF_HAVE_OLD) && !is_null_sha1(update->old_sha1)) die("BUG: initial ref transaction with old_sha1 set"); - if (verify_refname_available(update->refname, - &affected_refnames, NULL, - err)) { + if (refs_verify_refname_available(&refs->base, update->refname, + &affected_refnames, NULL, + err)) { ret = TRANSACTION_NAME_CONFLICT; goto cleanup; } @@ -3936,10 +4114,10 @@ struct expire_reflog_cb { reflog_expiry_should_prune_fn *should_prune_fn; void *policy_cb; FILE *newlog; - unsigned char last_kept_sha1[20]; + struct object_id last_kept_oid; }; -static int expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1, +static int expire_reflog_ent(struct object_id *ooid, struct object_id *noid, const char *email, unsigned long timestamp, int tz, const char *message, void *cb_data) { @@ -3947,9 +4125,9 @@ static int expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1, struct expire_reflog_policy_cb *policy_cb = cb->policy_cb; if (cb->flags & EXPIRE_REFLOGS_REWRITE) - osha1 = cb->last_kept_sha1; + ooid = &cb->last_kept_oid; - if ((*cb->should_prune_fn)(osha1, nsha1, email, timestamp, tz, + if ((*cb->should_prune_fn)(ooid->hash, noid->hash, email, timestamp, tz, message, policy_cb)) { if (!cb->newlog) printf("would prune %s", message); @@ -3958,9 +4136,9 @@ static int expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1, } else { if (cb->newlog) { fprintf(cb->newlog, "%s %s %s %lu %+05d\t%s", - sha1_to_hex(osha1), sha1_to_hex(nsha1), + oid_to_hex(ooid), oid_to_hex(noid), email, timestamp, tz, message); - hashcpy(cb->last_kept_sha1, nsha1); + oidcpy(&cb->last_kept_oid, noid); } if (cb->flags & EXPIRE_REFLOGS_VERBOSE) printf("keep %s", message); @@ -3977,10 +4155,11 @@ static int files_reflog_expire(struct ref_store *ref_store, void *policy_cb_data) { struct files_ref_store *refs = - files_downcast(ref_store, 0, "reflog_expire"); + files_downcast(ref_store, REF_STORE_WRITE, "reflog_expire"); 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; @@ -4004,12 +4183,13 @@ static int files_reflog_expire(struct ref_store *ref_store, strbuf_release(&err); return -1; } - if (!reflog_exists(refname)) { + if (!refs_reflog_exists(ref_store, refname)) { unlock_ref(lock); 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 @@ -4034,7 +4214,7 @@ static int files_reflog_expire(struct ref_store *ref_store, } (*prepare_fn)(refname, sha1, cb.policy_cb); - for_each_reflog_ent(refname, expire_reflog_ent, &cb); + refs_for_each_reflog_ent(ref_store, refname, expire_reflog_ent, &cb); (*cleanup_fn)(cb.policy_cb); if (!(flags & EXPIRE_REFLOGS_DRY_RUN)) { @@ -4047,14 +4227,14 @@ static int files_reflog_expire(struct ref_store *ref_store, */ int update = (flags & EXPIRE_REFLOGS_UPDATE_REF) && !(type & REF_ISSYMREF) && - !is_null_sha1(cb.last_kept_sha1); + !is_null_oid(&cb.last_kept_oid); if (close_lock_file(&reflog_lock)) { status |= error("couldn't write %s: %s", log_file, strerror(errno)); } else if (update && (write_in_full(get_lock_file_fd(lock->lk), - sha1_to_hex(cb.last_kept_sha1), 40) != 40 || + oid_to_hex(&cb.last_kept_oid), GIT_SHA1_HEXSZ) != GIT_SHA1_HEXSZ || write_str_in_full(get_lock_file_fd(lock->lk), "\n") != 1 || close_ref(lock) < 0)) { status |= error("couldn't write %s", @@ -4080,18 +4260,21 @@ static int files_reflog_expire(struct ref_store *ref_store, static int files_init_db(struct ref_store *ref_store, struct strbuf *err) { - /* Check validity (but we don't need the result): */ - files_downcast(ref_store, 0, "init_db"); + struct files_ref_store *refs = + files_downcast(ref_store, REF_STORE_WRITE, "init_db"); + struct strbuf sb = STRBUF_INIT; /* * Create .git/refs/{heads,tags} */ - safe_create_dir(git_path("refs/heads"), 1); - safe_create_dir(git_path("refs/tags"), 1); - if (get_shared_repository()) { - adjust_shared_perm(git_path("refs/heads")); - adjust_shared_perm(git_path("refs/tags")); - } + files_ref_path(refs, &sb, "refs/heads"); + safe_create_dir(sb.buf, 1); + + strbuf_reset(&sb); + files_ref_path(refs, &sb, "refs/tags"); + safe_create_dir(sb.buf, 1); + + strbuf_release(&sb); return 0; } |