X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;ds=sidebyside;f=refs.c;h=8d3c502a151648abefc4afae70d1ec5f7b5d41b6;hb=f198e218494800787909af0f3985350c3ecc27b2;hp=c9bcf148b0e1cd659e645e0f793fc07ebc133426;hpb=afce435000030e3ad076ef1dd413e0fa314cdcbb;p=git.git diff --git a/refs.c b/refs.c index c9bcf148b..8d3c502a1 100644 --- a/refs.c +++ b/refs.c @@ -275,10 +275,8 @@ static struct ref_list *get_ref_dir(const char *base, struct ref_list *list) list = get_ref_dir(ref, list); continue; } - if (!resolve_ref(ref, sha1, 1, &flag)) { - error("%s points nowhere!", ref); - continue; - } + if (!resolve_ref(ref, sha1, 1, &flag)) + hashclr(sha1); list = add_ref(ref, sha1, flag, list, NULL); } free(ref); @@ -287,6 +285,35 @@ static struct ref_list *get_ref_dir(const char *base, struct ref_list *list) return sort_ref_list(list); } +struct warn_if_dangling_data { + const char *refname; + const char *msg_fmt; +}; + +static int warn_if_dangling_symref(const char *refname, const unsigned char *sha1, + int flags, void *cb_data) +{ + struct warn_if_dangling_data *d = cb_data; + const char *resolves_to; + unsigned char junk[20]; + + if (!(flags & REF_ISSYMREF)) + return 0; + + resolves_to = resolve_ref(refname, junk, 0, NULL); + if (!resolves_to || strcmp(resolves_to, d->refname)) + return 0; + + printf(d->msg_fmt, refname); + return 0; +} + +void warn_dangling_symref(const char *msg_fmt, const char *refname) +{ + struct warn_if_dangling_data data = { refname, msg_fmt }; + for_each_rawref(warn_if_dangling_symref, &data); +} + static struct ref_list *get_loose_refs(void) { if (!cached_refs.did_loose) { @@ -390,6 +417,18 @@ int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *re return retval; } +/* + * If the "reading" argument is set, this function finds out what _object_ + * the ref points at by "reading" the ref. The ref, if it is not symbolic, + * has to exist, and if it is symbolic, it has to point at an existing ref, + * because the "read" goes through the symref to the ref it points at. + * + * The access that is not "reading" may often be "writing", but does not + * have to; it can be merely checking _where it leads to_. If it is a + * prelude to "writing" to the ref, a write to a symref that points at + * yet-to-be-born ref will create the real ref pointed by the symref. + * reading=0 allows the caller to check where such a symref leads to. + */ const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int *flag) { int depth = MAXDEPTH; @@ -401,7 +440,7 @@ const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int * *flag = 0; for (;;) { - const char *path = git_path("%s", ref); + char path[PATH_MAX]; struct stat st; char *buf; int fd; @@ -409,13 +448,8 @@ const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int * if (--depth < 0) return NULL; - /* Special case: non-existing file. - * Not having the refs/heads/new-branch is OK - * if we are writing into it, so is .git/HEAD - * that points at refs/heads/master still to be - * born. It is NOT OK if we are resolving for - * reading. - */ + git_snpath(path, sizeof(path), "%s", ref); + /* Special case: non-existing file. */ if (lstat(path, &st) < 0) { struct ref_list *list = get_packed_refs(); while (list) { @@ -491,16 +525,19 @@ int read_ref(const char *ref, unsigned char *sha1) return -1; } +#define DO_FOR_EACH_INCLUDE_BROKEN 01 static int do_one_ref(const char *base, each_ref_fn fn, int trim, - void *cb_data, struct ref_list *entry) + int flags, void *cb_data, struct ref_list *entry) { if (strncmp(base, entry->name, trim)) return 0; - if (is_null_sha1(entry->sha1)) - return 0; - if (!has_sha1_file(entry->sha1)) { - error("%s does not point to a valid object!", entry->name); - return 0; + if (!(flags & DO_FOR_EACH_INCLUDE_BROKEN)) { + if (is_null_sha1(entry->sha1)) + return 0; + if (!has_sha1_file(entry->sha1)) { + error("%s does not point to a valid object!", entry->name); + return 0; + } } current_ref = entry; return fn(entry->name + trim, entry->sha1, entry->flag, cb_data); @@ -554,7 +591,7 @@ fallback: } static int do_for_each_ref(const char *base, each_ref_fn fn, int trim, - void *cb_data) + int flags, void *cb_data) { int retval = 0; struct ref_list *packed = get_packed_refs(); @@ -563,7 +600,7 @@ static int do_for_each_ref(const char *base, each_ref_fn fn, int trim, struct ref_list *extra; for (extra = extra_refs; extra; extra = extra->next) - retval = do_one_ref(base, fn, trim, cb_data, extra); + retval = do_one_ref(base, fn, trim, flags, cb_data, extra); while (packed && loose) { struct ref_list *entry; @@ -579,13 +616,13 @@ static int do_for_each_ref(const char *base, each_ref_fn fn, int trim, entry = packed; packed = packed->next; } - retval = do_one_ref(base, fn, trim, cb_data, entry); + retval = do_one_ref(base, fn, trim, flags, cb_data, entry); if (retval) goto end_each; } for (packed = packed ? packed : loose; packed; packed = packed->next) { - retval = do_one_ref(base, fn, trim, cb_data, packed); + retval = do_one_ref(base, fn, trim, flags, cb_data, packed); if (retval) goto end_each; } @@ -607,22 +644,28 @@ int head_ref(each_ref_fn fn, void *cb_data) int for_each_ref(each_ref_fn fn, void *cb_data) { - return do_for_each_ref("refs/", fn, 0, cb_data); + return do_for_each_ref("refs/", fn, 0, 0, cb_data); } int for_each_tag_ref(each_ref_fn fn, void *cb_data) { - return do_for_each_ref("refs/tags/", fn, 10, cb_data); + return do_for_each_ref("refs/tags/", fn, 10, 0, cb_data); } int for_each_branch_ref(each_ref_fn fn, void *cb_data) { - return do_for_each_ref("refs/heads/", fn, 11, cb_data); + return do_for_each_ref("refs/heads/", fn, 11, 0, cb_data); } int for_each_remote_ref(each_ref_fn fn, void *cb_data) { - return do_for_each_ref("refs/remotes/", fn, 13, cb_data); + return do_for_each_ref("refs/remotes/", fn, 13, 0, cb_data); +} + +int for_each_rawref(each_ref_fn fn, void *cb_data) +{ + return do_for_each_ref("refs/", fn, 0, + DO_FOR_EACH_INCLUDE_BROKEN, cb_data); } /* @@ -651,6 +694,7 @@ static inline int bad_ref_char(int ch) int check_ref_format(const char *ref) { int ch, level, bad_type; + int ret = CHECK_REF_FORMAT_OK; const char *cp = ref; level = 0; @@ -666,18 +710,18 @@ int check_ref_format(const char *ref) return CHECK_REF_FORMAT_ERROR; bad_type = bad_ref_char(ch); if (bad_type) { - return (bad_type == 2 && !*cp) - ? CHECK_REF_FORMAT_WILDCARD - : CHECK_REF_FORMAT_ERROR; + if (bad_type == 2 && (!*cp || *cp == '/') && + ret == CHECK_REF_FORMAT_OK) + ret = CHECK_REF_FORMAT_WILDCARD; + else + return CHECK_REF_FORMAT_ERROR; } /* scan the rest of the path component */ while ((ch = *cp++) != 0) { bad_type = bad_ref_char(ch); if (bad_type) { - return (bad_type == 2 && !*cp) - ? CHECK_REF_FORMAT_WILDCARD - : CHECK_REF_FORMAT_ERROR; + return CHECK_REF_FORMAT_ERROR; } if (ch == '/') break; @@ -688,7 +732,7 @@ int check_ref_format(const char *ref) if (!ch) { if (level < 2) return CHECK_REF_FORMAT_ONELEVEL; - return CHECK_REF_FORMAT_OK; + return ret; } } } @@ -788,10 +832,10 @@ static struct ref_lock *lock_ref_sha1_basic(const char *ref, const unsigned char char *ref_file; const char *orig_ref = ref; struct ref_lock *lock; - struct stat st; int last_errno = 0; - int type; + int type, lflags; int mustexist = (old_sha1 && !is_null_sha1(old_sha1)); + int missing = 0; lock = xcalloc(1, sizeof(struct ref_lock)); lock->lock_fd = -1; @@ -819,23 +863,27 @@ static struct ref_lock *lock_ref_sha1_basic(const char *ref, const unsigned char orig_ref, strerror(errno)); goto error_return; } + missing = is_null_sha1(lock->old_sha1); /* When the ref did not exist and we are creating it, * make sure there is no existing ref that is packed * whose name begins with our refname, nor a ref whose * name is a proper prefix of our refname. */ - if (is_null_sha1(lock->old_sha1) && + if (missing && !is_refname_available(ref, NULL, get_packed_refs(), 0)) goto error_return; lock->lk = xcalloc(1, sizeof(struct lock_file)); - if (flags & REF_NODEREF) + lflags = LOCK_DIE_ON_ERROR; + if (flags & REF_NODEREF) { ref = orig_ref; + lflags |= LOCK_NODEREF; + } lock->ref_name = xstrdup(ref); lock->orig_ref_name = xstrdup(orig_ref); ref_file = git_path("%s", ref); - if (lstat(ref_file, &st) && errno == ENOENT) + if (missing) lock->force_write = 1; if ((flags & REF_NODEREF) && (type & REF_ISSYMREF)) lock->force_write = 1; @@ -845,8 +893,8 @@ static struct ref_lock *lock_ref_sha1_basic(const char *ref, const unsigned char error("unable to create directory for %s", ref_file); goto error_return; } - lock->lock_fd = hold_lock_file_for_update(lock->lk, ref_file, 1); + lock->lock_fd = hold_lock_file_for_update(lock->lk, ref_file, lflags); return old_sha1 ? verify_lock(lock, old_sha1, mustexist) : lock; error_return: @@ -912,25 +960,33 @@ static int repack_without_ref(const char *refname) return commit_lock_file(&packlock); } -int delete_ref(const char *refname, const unsigned char *sha1) +int delete_ref(const char *refname, const unsigned char *sha1, int delopt) { struct ref_lock *lock; - int err, i, ret = 0, flag = 0; + int err, i = 0, ret = 0, flag = 0; lock = lock_ref_sha1_basic(refname, sha1, 0, &flag); if (!lock) return 1; - if (!(flag & REF_ISPACKED)) { + if (!(flag & REF_ISPACKED) || flag & REF_ISSYMREF) { /* loose */ - i = strlen(lock->lk->filename) - 5; /* .lock */ - lock->lk->filename[i] = 0; - err = unlink(lock->lk->filename); + const char *path; + + if (!(delopt & REF_NODEREF)) { + i = strlen(lock->lk->filename) - 5; /* .lock */ + lock->lk->filename[i] = 0; + path = lock->lk->filename; + } else { + path = git_path("%s", refname); + } + err = unlink(path); if (err && errno != ENOENT) { ret = 1; error("unlink(%s) failed: %s", - lock->lk->filename, strerror(errno)); + path, strerror(errno)); } - lock->lk->filename[i] = '.'; + if (!(delopt & REF_NODEREF)) + lock->lk->filename[i] = '.'; } /* removing the loose one could have resurrected an earlier * packed one. Also, if it was not loose we need to repack @@ -955,11 +1011,16 @@ int rename_ref(const char *oldref, const char *newref, const char *logmsg) struct ref_lock *lock; struct stat loginfo; int log = !lstat(git_path("logs/%s", oldref), &loginfo); + const char *symref = NULL; - if (S_ISLNK(loginfo.st_mode)) + if (log && S_ISLNK(loginfo.st_mode)) return error("reflog for %s is a symlink", oldref); - if (!resolve_ref(oldref, orig_sha1, 1, &flag)) + symref = resolve_ref(oldref, orig_sha1, 1, &flag); + if (flag & REF_ISSYMREF) + return error("refname %s is a symbolic ref, renaming it is not supported", + oldref); + if (!symref) return error("refname %s not found", oldref); if (!is_refname_available(newref, oldref, get_packed_refs(), 0)) @@ -979,12 +1040,12 @@ int rename_ref(const char *oldref, const char *newref, const char *logmsg) return error("unable to move logfile logs/%s to tmp-renamed-log: %s", oldref, strerror(errno)); - if (delete_ref(oldref, orig_sha1)) { + if (delete_ref(oldref, orig_sha1, REF_NODEREF)) { error("unable to delete old %s", oldref); goto rollback; } - if (resolve_ref(newref, sha1, 1, &flag) && delete_ref(newref, sha1)) { + if (resolve_ref(newref, sha1, 1, &flag) && delete_ref(newref, sha1, REF_NODEREF)) { if (errno==EISDIR) { if (remove_empty_directories(git_path("%s", newref))) { error("Directory not empty: %s", newref); @@ -1027,7 +1088,6 @@ int rename_ref(const char *oldref, const char *newref, const char *logmsg) error("unable to lock %s for update", newref); goto rollback; } - lock->force_write = 1; hashcpy(lock->old_sha1, orig_sha1); if (write_ref_sha1(lock, orig_sha1, logmsg)) { @@ -1121,13 +1181,14 @@ static int log_ref_write(const char *ref_name, const unsigned char *old_sha1, int logfd, written, oflags = O_APPEND | O_WRONLY; unsigned maxlen, len; int msglen; - char *log_file, *logrec; + char log_file[PATH_MAX]; + char *logrec; const char *committer; if (log_all_ref_updates < 0) log_all_ref_updates = !is_bare_repository(); - log_file = git_path("logs/%s", ref_name); + git_snpath(log_file, sizeof(log_file), "logs/%s", ref_name); if (log_all_ref_updates && (!prefixcmp(ref_name, "refs/heads/") || @@ -1256,7 +1317,7 @@ int create_symref(const char *ref_target, const char *refs_heads_master, const char *lockpath; char ref[1000]; int fd, len, written; - char *git_HEAD = xstrdup(git_path("%s", ref_target)); + char *git_HEAD = git_pathdup("%s", ref_target); unsigned char old_sha1[20], new_sha1[20]; if (logmsg && read_ref(ref_target, old_sha1)) @@ -1412,6 +1473,10 @@ int read_ref_at(const char *ref, unsigned long at_time, int cnt, unsigned char * tz = strtoul(tz_c, NULL, 10); if (get_sha1_hex(logdata, sha1)) die("Log %s is corrupt.", logfile); + if (is_null_sha1(sha1)) { + if (get_sha1_hex(logdata + 41, sha1)) + die("Log %s is corrupt.", logfile); + } if (msg) *msg = ref_msg(logdata, logend); munmap(log_mapped, mapsz); @@ -1425,7 +1490,7 @@ int read_ref_at(const char *ref, unsigned long at_time, int cnt, unsigned char * return 1; } -int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data) +int for_each_recent_reflog_ent(const char *ref, each_reflog_ent_fn fn, long ofs, void *cb_data) { const char *logfile; FILE *logfp; @@ -1436,6 +1501,16 @@ int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data) logfp = fopen(logfile, "r"); if (!logfp) return -1; + + if (ofs) { + struct stat statbuf; + if (fstat(fileno(logfp), &statbuf) || + statbuf.st_size < ofs || + fseek(logfp, -ofs, SEEK_END) || + fgets(buf, sizeof(buf), logfp)) + return -1; + } + while (fgets(buf, sizeof(buf), logfp)) { unsigned char osha1[20], nsha1[20]; char *email_end, *message; @@ -1469,6 +1544,11 @@ int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data) return ret; } +int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data) +{ + return for_each_recent_reflog_ent(ref, fn, 0, cb_data); +} + static int do_for_each_reflog(const char *base, each_ref_fn fn, void *cb_data) { DIR *dir = opendir(git_path("logs/%s", base)); @@ -1549,10 +1629,10 @@ int update_ref(const char *action, const char *refname, return 0; } -struct ref *find_ref_by_name(struct ref *list, const char *name) +struct ref *find_ref_by_name(const struct ref *list, const char *name) { for ( ; list; list = list->next) if (!strcmp(list->name, name)) - return list; + return (struct ref *)list; return NULL; }