diff options
Diffstat (limited to 'refs.c')
| -rw-r--r-- | refs.c | 161 |
1 files changed, 92 insertions, 69 deletions
@@ -19,6 +19,7 @@ #include "strvec.h" #include "repository.h" #include "sigchain.h" +#include "date.h" /* * List of all available backends @@ -291,20 +292,16 @@ struct ref_filter { void *cb_data; }; -int refs_read_ref_full(struct ref_store *refs, const char *refname, - int resolve_flags, struct object_id *oid, int *flags) +int read_ref_full(const char *refname, int resolve_flags, struct object_id *oid, int *flags) { - if (refs_resolve_ref_unsafe(refs, refname, resolve_flags, oid, flags)) + struct ref_store *refs = get_main_ref_store(the_repository); + + if (refs_resolve_ref_unsafe(refs, refname, resolve_flags, + oid, flags)) return 0; return -1; } -int read_ref_full(const char *refname, int resolve_flags, struct object_id *oid, int *flags) -{ - return refs_read_ref_full(get_main_ref_store(the_repository), refname, - resolve_flags, oid, flags); -} - int read_ref(const char *refname, struct object_id *oid) { return read_ref_full(refname, RESOLVE_REF_READING, oid, NULL); @@ -312,7 +309,8 @@ int read_ref(const char *refname, struct object_id *oid) int refs_ref_exists(struct ref_store *refs, const char *refname) { - return !!refs_resolve_ref_unsafe(refs, refname, RESOLVE_REF_READING, NULL, NULL); + return !!refs_resolve_ref_unsafe(refs, refname, RESOLVE_REF_READING, + NULL, NULL); } int ref_exists(const char *refname) @@ -655,12 +653,13 @@ int expand_ref(struct repository *repo, const char *str, int len, struct object_id oid_from_ref; struct object_id *this_result; int flag; + struct ref_store *refs = get_main_ref_store(repo); this_result = refs_found ? &oid_from_ref : oid; strbuf_reset(&fullref); strbuf_addf(&fullref, *p, len, str); - r = refs_resolve_ref_unsafe(get_main_ref_store(repo), - fullref.buf, RESOLVE_REF_READING, + r = refs_resolve_ref_unsafe(refs, fullref.buf, + RESOLVE_REF_READING, this_result, &flag); if (r) { if (!refs_found++) @@ -1078,9 +1077,10 @@ int ref_transaction_update(struct ref_transaction *transaction, { assert(err); - if ((new_oid && !is_null_oid(new_oid)) ? - check_refname_format(refname, REFNAME_ALLOW_ONELEVEL) : - !refname_is_safe(refname)) { + if (!(flags & REF_SKIP_REFNAME_VERIFICATION) && + ((new_oid && !is_null_oid(new_oid)) ? + check_refname_format(refname, REFNAME_ALLOW_ONELEVEL) : + !refname_is_safe(refname))) { strbuf_addf(err, _("refusing to update ref with bad name '%s'"), refname); return -1; @@ -1089,6 +1089,13 @@ int ref_transaction_update(struct ref_transaction *transaction, if (flags & ~REF_TRANSACTION_UPDATE_ALLOWED_FLAGS) BUG("illegal flags 0x%x passed to ref_transaction_update()", flags); + /* + * Clear flags outside the allowed set; this should be a noop because + * of the BUG() check above, but it works around a -Wnonnull warning + * with some versions of "gcc -O3". + */ + flags &= REF_TRANSACTION_UPDATE_ALLOWED_FLAGS; + flags |= (new_oid ? REF_HAVE_NEW : 0) | (old_oid ? REF_HAVE_OLD : 0); ref_transaction_add_update(transaction, refname, flags, @@ -1102,8 +1109,10 @@ int ref_transaction_create(struct ref_transaction *transaction, unsigned int flags, const char *msg, struct strbuf *err) { - if (!new_oid || is_null_oid(new_oid)) - BUG("create called without valid new_oid"); + if (!new_oid || is_null_oid(new_oid)) { + strbuf_addf(err, "'%s' has a null OID", refname); + return 1; + } return ref_transaction_update(transaction, refname, new_oid, null_oid(), flags, msg, err); } @@ -1373,32 +1382,13 @@ const char *find_descendant_ref(const char *dirname, return NULL; } -int refs_rename_ref_available(struct ref_store *refs, - const char *old_refname, - const char *new_refname) -{ - struct string_list skip = STRING_LIST_INIT_NODUP; - struct strbuf err = STRBUF_INIT; - int ok; - - string_list_insert(&skip, old_refname); - ok = !refs_verify_refname_available(refs, new_refname, - NULL, &skip, &err); - if (!ok) - error("%s", err.buf); - - string_list_clear(&skip, 0); - strbuf_release(&err); - return ok; -} - int refs_head_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data) { struct object_id oid; int flag; - if (!refs_read_ref_full(refs, "HEAD", RESOLVE_REF_READING, - &oid, &flag)) + if (refs_resolve_ref_unsafe(refs, "HEAD", RESOLVE_REF_READING, + &oid, &flag)) return fn("HEAD", &oid, flag, cb_data); return 0; @@ -1649,7 +1639,8 @@ int for_each_fullref_in_prefixes(const char *namespace, static int refs_read_special_head(struct ref_store *ref_store, const char *refname, struct object_id *oid, - struct strbuf *referent, unsigned int *type) + struct strbuf *referent, unsigned int *type, + int *failure_errno) { struct strbuf full_path = STRBUF_INIT; struct strbuf content = STRBUF_INIT; @@ -1659,7 +1650,8 @@ static int refs_read_special_head(struct ref_store *ref_store, if (strbuf_read_file(&content, full_path.buf, 0) < 0) goto done; - result = parse_loose_ref_contents(content.buf, oid, referent, type); + result = parse_loose_ref_contents(content.buf, oid, referent, type, + failure_errno); done: strbuf_release(&full_path); @@ -1667,24 +1659,31 @@ done: return result; } -int refs_read_raw_ref(struct ref_store *ref_store, - const char *refname, struct object_id *oid, - struct strbuf *referent, unsigned int *type) +int refs_read_raw_ref(struct ref_store *ref_store, const char *refname, + struct object_id *oid, struct strbuf *referent, + unsigned int *type, int *failure_errno) { + assert(failure_errno); if (!strcmp(refname, "FETCH_HEAD") || !strcmp(refname, "MERGE_HEAD")) { return refs_read_special_head(ref_store, refname, oid, referent, - type); + type, failure_errno); } return ref_store->be->read_raw_ref(ref_store, refname, oid, referent, - type, &errno); + type, failure_errno); +} + +int refs_read_symbolic_ref(struct ref_store *ref_store, const char *refname, + struct strbuf *referent) +{ + return ref_store->be->read_symbolic_ref(ref_store, refname, referent); } -/* This function needs to return a meaningful errno on failure */ const char *refs_resolve_ref_unsafe(struct ref_store *refs, const char *refname, int resolve_flags, - struct object_id *oid, int *flags) + struct object_id *oid, + int *flags) { static struct strbuf sb_refname = STRBUF_INIT; struct object_id unused_oid; @@ -1700,10 +1699,8 @@ const char *refs_resolve_ref_unsafe(struct ref_store *refs, if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) { if (!(resolve_flags & RESOLVE_REF_ALLOW_BAD_NAME) || - !refname_is_safe(refname)) { - errno = EINVAL; + !refname_is_safe(refname)) return NULL; - } /* * dwim_ref() uses REF_ISBROKEN to distinguish between @@ -1718,9 +1715,10 @@ const char *refs_resolve_ref_unsafe(struct ref_store *refs, for (symref_count = 0; symref_count < SYMREF_MAXDEPTH; symref_count++) { unsigned int read_flags = 0; + int failure_errno; - if (refs_read_raw_ref(refs, refname, - oid, &sb_refname, &read_flags)) { + if (refs_read_raw_ref(refs, refname, oid, &sb_refname, + &read_flags, &failure_errno)) { *flags |= read_flags; /* In reading mode, refs must eventually resolve */ @@ -1732,9 +1730,9 @@ const char *refs_resolve_ref_unsafe(struct ref_store *refs, * may show errors besides ENOENT if there are * similarly-named refs. */ - if (errno != ENOENT && - errno != EISDIR && - errno != ENOTDIR) + if (failure_errno != ENOENT && + failure_errno != EISDIR && + failure_errno != ENOTDIR) return NULL; oidclr(oid); @@ -1760,16 +1758,13 @@ const char *refs_resolve_ref_unsafe(struct ref_store *refs, } if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) { if (!(resolve_flags & RESOLVE_REF_ALLOW_BAD_NAME) || - !refname_is_safe(refname)) { - errno = EINVAL; + !refname_is_safe(refname)) return NULL; - } *flags |= REF_ISBROKEN | REF_BAD_NAME; } } - errno = ELOOP; return NULL; } @@ -2002,10 +1997,12 @@ struct ref_store *get_worktree_ref_store(const struct worktree *wt) return refs; } -void base_ref_store_init(struct ref_store *refs, - const struct ref_storage_be *be) +void base_ref_store_init(struct ref_store *refs, struct repository *repo, + const char *path, const struct ref_storage_be *be) { refs->be = be; + refs->repo = repo; + refs->gitdir = xstrdup(path); } /* backend functions */ @@ -2102,8 +2099,11 @@ static int run_transaction_hook(struct ref_transaction *transaction, update->refname); if (write_in_full(proc.in, buf.buf, buf.len) < 0) { - if (errno != EPIPE) + if (errno != EPIPE) { + /* Don't leak errno outside this API */ + errno = 0; ret = -1; + } break; } } @@ -2137,7 +2137,7 @@ int ref_transaction_prepare(struct ref_transaction *transaction, break; } - if (getenv(GIT_QUARANTINE_ENVIRONMENT)) { + if (refs->repo->objects->odb->disable_ref_updates) { strbuf_addstr(err, _("ref updates forbidden inside quarantine environment")); return -1; @@ -2238,6 +2238,13 @@ int refs_verify_refname_available(struct ref_store *refs, strbuf_grow(&dirname, strlen(refname) + 1); for (slash = strchr(refname, '/'); slash; slash = strchr(slash + 1, '/')) { + /* + * Just saying "Is a directory" when we e.g. can't + * lock some multi-level ref isn't very informative, + * the user won't be told *what* is a directory, so + * let's not use strerror() below. + */ + int ignore_errno; /* Expand dirname to the new prefix, not including the trailing slash: */ strbuf_add(&dirname, refname + dirname.len, slash - refname - dirname.len); @@ -2249,7 +2256,8 @@ int refs_verify_refname_available(struct ref_store *refs, if (skip && string_list_has_string(skip, dirname.buf)) continue; - if (!refs_read_raw_ref(refs, dirname.buf, &oid, &referent, &type)) { + if (!refs_read_raw_ref(refs, dirname.buf, &oid, &referent, + &type, &ignore_errno)) { strbuf_addf(err, _("'%s' exists; cannot create '%s'"), dirname.buf, refname); goto cleanup; @@ -2358,16 +2366,15 @@ int reflog_exists(const char *refname) } int refs_create_reflog(struct ref_store *refs, const char *refname, - int force_create, struct strbuf *err) + struct strbuf *err) { - return refs->be->create_reflog(refs, refname, force_create, err); + return refs->be->create_reflog(refs, refname, err); } -int safe_create_reflog(const char *refname, int force_create, - struct strbuf *err) +int safe_create_reflog(const char *refname, struct strbuf *err) { return refs_create_reflog(get_main_ref_store(the_repository), refname, - force_create, err); + err); } int refs_delete_reflog(struct ref_store *refs, const char *refname) @@ -2414,6 +2421,22 @@ int initial_ref_transaction_commit(struct ref_transaction *transaction, return refs->be->initial_transaction_commit(refs, transaction, err); } +void ref_transaction_for_each_queued_update(struct ref_transaction *transaction, + ref_transaction_for_each_queued_update_fn cb, + void *cb_data) +{ + int i; + + for (i = 0; i < transaction->nr; i++) { + struct ref_update *update = transaction->updates[i]; + + cb(update->refname, + (update->flags & REF_HAVE_OLD) ? &update->old_oid : NULL, + (update->flags & REF_HAVE_NEW) ? &update->new_oid : NULL, + cb_data); + } +} + int refs_delete_refs(struct ref_store *refs, const char *logmsg, struct string_list *refnames, unsigned int flags) { |