diff options
Diffstat (limited to 'refs')
| -rw-r--r-- | refs/files-backend.c | 548 | ||||
| -rw-r--r-- | refs/refs-internal.h | 64 |
2 files changed, 369 insertions, 243 deletions
diff --git a/refs/files-backend.c b/refs/files-backend.c index 50188e92f9..4d705b4037 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) { @@ -912,13 +916,11 @@ struct packed_ref_cache { */ struct files_ref_store { struct ref_store base; + unsigned int store_flags; - /* - * The name of the submodule represented by this object, or - * NULL if it represents the main repository's reference - * store: - */ - const char *submodule; + char *gitdir; + char *gitcommondir; + char *packed_refs_path; struct ref_entry *loose; struct packed_ref_cache *packed; @@ -975,38 +977,47 @@ 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); + refs->store_flags = flags; - refs->submodule = xstrdup_or_null(submodule); + 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 for a submodule (i.e., not for the main repository). - * caller is used in any necessary error messages. + * 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->submodule) - die("BUG: %s called for a submodule", 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; @@ -1016,8 +1027,9 @@ static struct files_ref_store *files_downcast( refs = (struct files_ref_store *)ref_store; - if (!submodule_allowed) - files_assert_main_repository(refs, caller); + 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 refs; } @@ -1150,19 +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->submodule) - packed_refs_file = git_pathdup_submodule(refs->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)) @@ -1181,7 +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; } @@ -1226,19 +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->submodule) - err = strbuf_git_path_submodule(&path, refs->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); @@ -1267,7 +1313,7 @@ static void read_loose_refs(const char *dirname, struct ref_dir *dir) create_dir_entry(refs, refname.buf, refname.len, 1)); } else { - if (!resolve_ref_recursively(&refs->base, + if (!refs_resolve_ref_unsafe(&refs->base, refname.buf, RESOLVE_REF_READING, sha1, &flag)) { @@ -1359,7 +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; @@ -1373,10 +1419,7 @@ static int files_read_raw_ref(struct ref_store *ref_store, *type = 0; strbuf_reset(&sb_path); - if (refs->submodule) - strbuf_git_path_submodule(&sb_path, refs->submodule, "%s", refname); - else - strbuf_git_path(&sb_path, "%s", refname); + files_ref_path(refs, &sb_path, refname); path = sb_path.buf; @@ -1564,7 +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)) { @@ -1579,7 +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 @@ -1779,7 +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]; @@ -1792,7 +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; /* @@ -1887,21 +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); @@ -1960,15 +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); @@ -2036,9 +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 @@ -2055,8 +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; @@ -2094,7 +2143,7 @@ static struct ref_lock *lock_ref_sha1_basic(struct files_ref_store *refs, 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; } @@ -2157,7 +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; /* @@ -2306,9 +2355,12 @@ 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; char *p, *q; int i; @@ -2330,18 +2382,23 @@ static void try_remove_empty_parents(const char *refname, unsigned int flags) if (q == p) break; strbuf_setlen(&buf, q - buf.buf); - if ((flags & REMOVE_EMPTY_PARENTS_REF) && - rmdir(git_path("%s", 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; - if ((flags & REMOVE_EMPTY_PARENTS_REFLOG) && - rmdir(git_path("logs/%s", buf.buf))) + + 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; @@ -2349,7 +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) || @@ -2363,10 +2420,10 @@ static void prune_ref(struct ref_to_prune *r) strbuf_release(&err); } -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; } } @@ -2374,7 +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)); @@ -2389,7 +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; } @@ -2423,7 +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); @@ -2453,7 +2511,7 @@ 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; @@ -2481,7 +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(NULL, refname, NULL, flags)) + if (refs_delete_ref(&refs->base, NULL, refname, NULL, flags)) result |= error(_("could not remove reference %s"), refname); } @@ -2497,13 +2555,18 @@ 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_callback(const char *path, void *cb) +static int rename_tmp_log_callback(const char *path, void *cb_data) { - int *true_errno = cb; + struct rename_cb *cb = cb_data; - if (rename(git_path(TMP_RENAMED_LOG), path)) { + 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. @@ -2511,7 +2574,7 @@ static int rename_tmp_log_callback(const char *path, void *cb) * but report EISDIR to raceproof_create_file() so * that it knows to retry. */ - *true_errno = errno; + cb->true_errno = errno; if (errno == ENOTDIR) errno = EISDIR; return -1; @@ -2520,22 +2583,28 @@ static int rename_tmp_log_callback(const char *path, void *cb) } } -static int rename_tmp_log(const char *newrefname) +static int rename_tmp_log(struct files_ref_store *refs, const char *newrefname) { - char *path = git_pathdup("logs/%s", newrefname); - int ret, true_errno; + struct strbuf path = STRBUF_INIT; + struct strbuf tmp = STRBUF_INIT; + struct rename_cb cb; + int ret; - ret = raceproof_create_file(path, rename_tmp_log_callback, &true_errno); + 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); + error("directory not empty: %s", path.buf); else error("unable to move logfile %s to %s: %s", - git_path(TMP_RENAMED_LOG), path, - strerror(true_errno)); + tmp.buf, path.buf, + strerror(cb.true_errno)); } - free(path); + strbuf_release(&path); + strbuf_release(&tmp); return ret; } @@ -2546,7 +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); @@ -2571,32 +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 (delete_ref(logmsg, oldrefname, orig_sha1, REF_NODEREF)) { + 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 (refs_delete_ref(&refs->base, logmsg, oldrefname, + orig_sha1, REF_NODEREF)) { error("unable to delete old %s", oldrefname); goto rollback; } @@ -2608,14 +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(NULL, newrefname, NULL, REF_NODEREF)) { + 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); @@ -2629,7 +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; @@ -2650,7 +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, @@ -2671,15 +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) @@ -2738,10 +2835,15 @@ 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)) { @@ -2791,12 +2893,11 @@ 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, REF_STORE_WRITE, "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) @@ -2831,16 +2932,18 @@ static int log_ref_write_fd(int fd, const unsigned char *old_sha1, return 0; } -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) +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; 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) @@ -2851,18 +2954,24 @@ int files_log_ref_write(const char *refname, const unsigned char *old_sha1, result = log_ref_write_fd(logfd, old_sha1, new_sha1, git_committer_info(0), msg); if (result) { + struct strbuf sb = STRBUF_INIT; int save_errno = errno; + files_reflog_path(refs, &sb, refname); strbuf_addf(err, "unable to append to '%s': %s", - git_path("logs/%s", refname), strerror(save_errno)); + sb.buf, strerror(save_errno)); + strbuf_release(&sb); close(logfd); return -1; } if (close(logfd)) { + struct strbuf sb = STRBUF_INIT; int save_errno = errno; + files_reflog_path(refs, &sb, refname); strbuf_addf(err, "unable to append to '%s': %s", - git_path("logs/%s", refname), strerror(save_errno)); + sb.buf, strerror(save_errno)); + strbuf_release(&sb); return -1; } return 0; @@ -2920,7 +3029,8 @@ 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", @@ -2947,13 +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 (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); } @@ -2985,24 +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) && - files_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; } @@ -3010,7 +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); @@ -3025,7 +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; @@ -3039,13 +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, 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; @@ -3072,7 +3197,7 @@ 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); @@ -3082,22 +3207,30 @@ 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, 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) @@ -3145,15 +3278,17 @@ 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; @@ -3252,14 +3387,16 @@ 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; @@ -3273,6 +3410,7 @@ 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; }; @@ -3294,8 +3432,9 @@ 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; } @@ -3339,14 +3478,18 @@ 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; } @@ -3585,8 +3728,9 @@ 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", @@ -3676,7 +3820,8 @@ 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; @@ -3684,6 +3829,7 @@ 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); @@ -3738,8 +3884,9 @@ 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); @@ -3768,7 +3915,8 @@ 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, @@ -3805,7 +3953,9 @@ static int files_transaction_commit(struct ref_store *ref_store, if (!(update->type & REF_ISPACKED) || update->type & REF_ISSYMREF) { /* It is a loose reference. */ - if (unlink_or_msg(git_path("%s", lock->ref_name), err)) { + strbuf_reset(&sb); + files_ref_path(refs, &sb, lock->ref_name); + if (unlink_or_msg(sb.buf, err)) { ret = TRANSACTION_GENERIC_ERROR; goto cleanup; } @@ -3825,14 +3975,17 @@ 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) { - if (!unlink_or_warn(git_path("logs/%s", ref_to_delete->string))) - try_remove_empty_parents(ref_to_delete->string, + 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++) { @@ -3849,7 +4002,7 @@ 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); } } @@ -3874,7 +4027,8 @@ 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; @@ -3905,7 +4059,8 @@ 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++) { @@ -3914,9 +4069,9 @@ 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; } @@ -3996,10 +4151,11 @@ 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; @@ -4023,12 +4179,13 @@ 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 @@ -4053,7 +4210,7 @@ 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)) { @@ -4099,18 +4256,21 @@ 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; } diff --git a/refs/refs-internal.h b/refs/refs-internal.h index fa93c9a32e..690498698e 100644 --- a/refs/refs-internal.h +++ b/refs/refs-internal.h @@ -112,28 +112,6 @@ enum peel_status { enum peel_status peel_object(const unsigned char *name, unsigned char *sha1); /* - * Return 0 if a reference named refname could be created without - * conflicting with the name of an existing reference. Otherwise, - * return a negative value and write an explanation to err. If extras - * is non-NULL, it is a list of additional refnames with which refname - * is not allowed to conflict. If skip is non-NULL, ignore potential - * conflicts with refs in skip (e.g., because they are scheduled for - * deletion in the same operation). Behavior is undefined if the same - * name is listed in both extras and skip. - * - * Two reference names conflict if one of them exactly matches the - * leading components of the other; e.g., "foo/bar" conflicts with - * both "foo" and with "foo/bar/baz" but not with "foo/bar" or - * "foo/barbados". - * - * extras and skip must be sorted. - */ -int verify_refname_available(const char *newname, - const struct string_list *extras, - const struct string_list *skip, - struct strbuf *err); - -/* * Copy the reflog message msg to buf, which has been allocated sufficiently * large, while cleaning up the whitespaces. Especially, convert LF to space, * because reflog file is one line per entry. @@ -222,16 +200,13 @@ enum ref_transaction_state { * as atomically as possible. This structure is opaque to callers. */ struct ref_transaction { + struct ref_store *ref_store; struct ref_update **updates; size_t alloc; size_t nr; enum ref_transaction_state state; }; -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); - /* * Check for entries in extras that are within the specified * directory, where dirname is a reference directory name including @@ -256,7 +231,9 @@ const char *find_descendant_ref(const char *dirname, * processes (though rename_ref() catches some races that might get by * this check). */ -int rename_ref_available(const char *old_refname, const char *new_refname); +int refs_rename_ref_available(struct ref_store *refs, + const char *old_refname, + const char *new_refname); /* We allow "recursive" symbolic refs. Only within reason, though */ #define SYMREF_MAXDEPTH 5 @@ -485,13 +462,19 @@ struct ref_store; /* refs backends */ +/* ref_store_init flags */ +#define REF_STORE_READ (1 << 0) +#define REF_STORE_WRITE (1 << 1) /* can perform update operations */ +#define REF_STORE_ODB (1 << 2) /* has access to object database */ +#define REF_STORE_MAIN (1 << 3) + /* - * Initialize the ref_store for the specified submodule, or for the - * main repository if submodule == NULL. These functions should call - * base_ref_store_init() to initialize the shared part of the - * ref_store and to record the ref_store for later lookup. + * Initialize the ref_store for the specified gitdir. These functions + * should call base_ref_store_init() to initialize the shared part of + * the ref_store and to record the ref_store for later lookup. */ -typedef struct ref_store *ref_store_init_fn(const char *submodule); +typedef struct ref_store *ref_store_init_fn(const char *gitdir, + unsigned int flags); typedef int ref_init_db_fn(struct ref_store *refs, struct strbuf *err); @@ -644,21 +627,4 @@ struct ref_store { void base_ref_store_init(struct ref_store *refs, const struct ref_storage_be *be); -/* - * Return the ref_store instance for the specified submodule. For the - * main repository, use submodule==NULL; such a call cannot fail. For - * a submodule, the submodule must exist and be a nonbare repository, - * otherwise return NULL. If the requested reference store has not yet - * been initialized, initialize it first. - * - * For backwards compatibility, submodule=="" is treated the same as - * submodule==NULL. - */ -struct ref_store *get_ref_store(const char *submodule); - -const char *resolve_ref_recursively(struct ref_store *refs, - const char *refname, - int resolve_flags, - unsigned char *sha1, int *flags); - #endif /* REFS_REFS_INTERNAL_H */ |