struct ref_list **new_entry)
{
int len;
- struct ref_list **p = &list, *entry;
-
- /* Find the place to insert the ref into.. */
- while ((entry = *p) != NULL) {
- int cmp = strcmp(entry->name, name);
- if (cmp > 0)
- break;
-
- /* Same as existing entry? */
- if (!cmp) {
- if (new_entry)
- *new_entry = entry;
- return list;
- }
- p = &entry->next;
- }
+ struct ref_list *entry;
/* Allocate it and add it in.. */
len = strlen(name) + 1;
hashclr(entry->peeled);
memcpy(entry->name, name, len);
entry->flag = flag;
- entry->next = *p;
- *p = entry;
+ entry->next = list;
if (new_entry)
*new_entry = entry;
- return list;
+ return entry;
+}
+
+/* merge sort the ref list */
+static struct ref_list *sort_ref_list(struct ref_list *list)
+{
+ int psize, qsize, last_merge_count, cmp;
+ struct ref_list *p, *q, *l, *e;
+ struct ref_list *new_list = list;
+ int k = 1;
+ int merge_count = 0;
+
+ if (!list)
+ return list;
+
+ do {
+ last_merge_count = merge_count;
+ merge_count = 0;
+
+ psize = 0;
+
+ p = new_list;
+ q = new_list;
+ new_list = NULL;
+ l = NULL;
+
+ while (p) {
+ merge_count++;
+
+ while (psize < k && q->next) {
+ q = q->next;
+ psize++;
+ }
+ qsize = k;
+
+ while ((psize > 0) || (qsize > 0 && q)) {
+ if (qsize == 0 || !q) {
+ e = p;
+ p = p->next;
+ psize--;
+ } else if (psize == 0) {
+ e = q;
+ q = q->next;
+ qsize--;
+ } else {
+ cmp = strcmp(q->name, p->name);
+ if (cmp < 0) {
+ e = q;
+ q = q->next;
+ qsize--;
+ } else if (cmp > 0) {
+ e = p;
+ p = p->next;
+ psize--;
+ } else {
+ if (hashcmp(q->sha1, p->sha1))
+ die("Duplicated ref, and SHA1s don't match: %s",
+ q->name);
+ warning("Duplicated ref: %s", q->name);
+ e = q;
+ q = q->next;
+ qsize--;
+ free(e);
+ e = p;
+ p = p->next;
+ psize--;
+ }
+ }
+
+ e->next = NULL;
+
+ if (l)
+ l->next = e;
+ if (!new_list)
+ new_list = e;
+ l = e;
+ }
+
+ p = q;
+ };
+
+ k = k * 2;
+ } while ((last_merge_count != merge_count) || (last_merge_count != 1));
+
+ return new_list;
}
/*
!get_sha1_hex(refline + 1, sha1))
hashcpy(last->peeled, sha1);
}
- cached_refs->packed = list;
+ cached_refs->packed = sort_ref_list(list);
}
static struct ref_list *get_packed_refs(void)
free(ref);
closedir(dir);
}
- return list;
+ return sort_ref_list(list);
}
static struct ref_list *get_loose_refs(void)
/* We allow "recursive" symbolic refs. Only within reason, though */
#define MAXDEPTH 5
+#define MAXREFLEN (1024)
+
+static int resolve_gitlink_packed_ref(char *name, int pathlen, const char *refname, unsigned char *result)
+{
+ FILE *f;
+ struct cached_refs refs;
+ struct ref_list *ref;
+ int retval;
+
+ strcpy(name + pathlen, "packed-refs");
+ f = fopen(name, "r");
+ if (!f)
+ return -1;
+ read_packed_refs(f, &refs);
+ fclose(f);
+ ref = refs.packed;
+ retval = -1;
+ while (ref) {
+ if (!strcmp(ref->name, refname)) {
+ retval = 0;
+ memcpy(result, ref->sha1, 20);
+ break;
+ }
+ ref = ref->next;
+ }
+ free_ref_list(refs.packed);
+ return retval;
+}
+
+static int resolve_gitlink_ref_recursive(char *name, int pathlen, const char *refname, unsigned char *result, int recursion)
+{
+ int fd, len = strlen(refname);
+ char buffer[128], *p;
+
+ if (recursion > MAXDEPTH || len > MAXREFLEN)
+ return -1;
+ memcpy(name + pathlen, refname, len+1);
+ fd = open(name, O_RDONLY);
+ if (fd < 0)
+ return resolve_gitlink_packed_ref(name, pathlen, refname, result);
+
+ len = read(fd, buffer, sizeof(buffer)-1);
+ close(fd);
+ if (len < 0)
+ return -1;
+ while (len && isspace(buffer[len-1]))
+ len--;
+ buffer[len] = 0;
+
+ /* Was it a detached head or an old-fashioned symlink? */
+ if (!get_sha1_hex(buffer, result))
+ return 0;
+
+ /* Symref? */
+ if (strncmp(buffer, "ref:", 4))
+ return -1;
+ p = buffer + 4;
+ while (isspace(*p))
+ p++;
+
+ return resolve_gitlink_ref_recursive(name, pathlen, p, result, recursion+1);
+}
+
+int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *result)
+{
+ int len = strlen(path), retval;
+ char *gitdir;
+
+ while (len && path[len-1] == '/')
+ len--;
+ if (!len)
+ return -1;
+ gitdir = xmalloc(len + MAXREFLEN + 8);
+ memcpy(gitdir, path, len);
+ memcpy(gitdir + len, "/.git/", 7);
+
+ retval = resolve_gitlink_ref_recursive(gitdir, len+6, refname, result, 0);
+ free(gitdir);
+ return retval;
+}
const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int *flag)
{
return ref;
}
-int create_symref(const char *ref_target, const char *refs_heads_master)
-{
- const char *lockpath;
- char ref[1000];
- int fd, len, written;
- const char *git_HEAD = git_path("%s", ref_target);
-
-#ifndef NO_SYMLINK_HEAD
- if (prefer_symlink_refs) {
- unlink(git_HEAD);
- if (!symlink(refs_heads_master, git_HEAD))
- return 0;
- fprintf(stderr, "no symlink - falling back to symbolic ref\n");
- }
-#endif
-
- len = snprintf(ref, sizeof(ref), "ref: %s\n", refs_heads_master);
- if (sizeof(ref) <= len) {
- error("refname too long: %s", refs_heads_master);
- return -1;
- }
- lockpath = mkpath("%s.lock", git_HEAD);
- fd = open(lockpath, O_CREAT | O_EXCL | O_WRONLY, 0666);
- if (fd < 0) {
- error("Unable to open %s for writing", lockpath);
- return -5;
- }
- written = write_in_full(fd, ref, len);
- close(fd);
- if (written != len) {
- unlink(lockpath);
- error("Unable to write to %s", lockpath);
- return -2;
- }
- if (rename(lockpath, git_HEAD) < 0) {
- unlink(lockpath);
- error("Unable to create %s", git_HEAD);
- return -3;
- }
- if (adjust_shared_perm(git_HEAD)) {
- unlink(lockpath);
- error("Unable to fix permissions on %s", lockpath);
- return -4;
- }
- return 0;
-}
-
int read_ref(const char *ref, unsigned char *sha1)
{
if (resolve_ref(ref, sha1, 1, NULL))
static inline int bad_ref_char(int ch)
{
- return (((unsigned) ch) <= ' ' ||
- ch == '~' || ch == '^' || ch == ':' ||
- /* 2.13 Pattern Matching Notation */
- ch == '?' || ch == '*' || ch == '[');
+ if (((unsigned) ch) <= ' ' ||
+ ch == '~' || ch == '^' || ch == ':')
+ return 1;
+ /* 2.13 Pattern Matching Notation */
+ if (ch == '?' || ch == '[') /* Unsupported */
+ return 1;
+ if (ch == '*') /* Supported at the end */
+ return 2;
+ return 0;
}
int check_ref_format(const char *ref)
{
- int ch, level;
+ int ch, level, bad_type;
const char *cp = ref;
level = 0;
return -1; /* should not end with slashes */
/* we are at the beginning of the path component */
- if (ch == '.' || bad_ref_char(ch))
+ if (ch == '.')
return -1;
+ bad_type = bad_ref_char(ch);
+ if (bad_type) {
+ return (bad_type == 2 && !*cp) ? -3 : -1;
+ }
/* scan the rest of the path component */
while ((ch = *cp++) != 0) {
- if (bad_ref_char(ch))
- return -1;
+ bad_type = bad_ref_char(ch);
+ if (bad_type) {
+ return (bad_type == 2 && !*cp) ? -3 : -1;
+ }
if (ch == '/')
break;
if (ch == '.' && *cp == '.')
return 1;
}
-static struct ref_lock *lock_ref_sha1_basic(const char *ref, const unsigned char *old_sha1, int *flag)
+static struct ref_lock *lock_ref_sha1_basic(const char *ref, const unsigned char *old_sha1, int flags, int *type_p)
{
char *ref_file;
const char *orig_ref = ref;
struct ref_lock *lock;
struct stat st;
int last_errno = 0;
+ int type;
int mustexist = (old_sha1 && !is_null_sha1(old_sha1));
lock = xcalloc(1, sizeof(struct ref_lock));
lock->lock_fd = -1;
- ref = resolve_ref(ref, lock->old_sha1, mustexist, flag);
+ ref = resolve_ref(ref, lock->old_sha1, mustexist, &type);
if (!ref && errno == EISDIR) {
/* we are trying to lock foo but we used to
* have foo/bar which now does not exist;
error("there are still refs under '%s'", orig_ref);
goto error_return;
}
- ref = resolve_ref(orig_ref, lock->old_sha1, mustexist, flag);
+ ref = resolve_ref(orig_ref, lock->old_sha1, mustexist, &type);
}
+ if (type_p)
+ *type_p = type;
if (!ref) {
last_errno = errno;
error("unable to resolve reference %s: %s",
lock->lk = xcalloc(1, sizeof(struct lock_file));
+ if (flags & REF_NODEREF)
+ ref = orig_ref;
lock->ref_name = xstrdup(ref);
- lock->log_file = xstrdup(git_path("logs/%s", ref));
+ lock->orig_ref_name = xstrdup(orig_ref);
ref_file = git_path("%s", ref);
- lock->force_write = lstat(ref_file, &st) && errno == ENOENT;
+ if (lstat(ref_file, &st) && errno == ENOENT)
+ lock->force_write = 1;
+ if ((flags & REF_NODEREF) && (type & REF_ISSYMREF))
+ lock->force_write = 1;
if (safe_create_leading_directories(ref_file)) {
last_errno = errno;
if (check_ref_format(ref))
return NULL;
strcpy(refpath, mkpath("refs/%s", ref));
- return lock_ref_sha1_basic(refpath, old_sha1, NULL);
+ return lock_ref_sha1_basic(refpath, old_sha1, 0, NULL);
}
-struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1)
+struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1, int flags)
{
if (check_ref_format(ref) == -1)
return NULL;
- return lock_ref_sha1_basic(ref, old_sha1, NULL);
+ return lock_ref_sha1_basic(ref, old_sha1, flags, NULL);
}
static struct lock_file packlock;
return commit_lock_file(&packlock);
}
-int delete_ref(const char *refname, unsigned char *sha1)
+int delete_ref(const char *refname, const unsigned char *sha1)
{
struct ref_lock *lock;
int err, i, ret = 0, flag = 0;
- lock = lock_ref_sha1_basic(refname, sha1, &flag);
+ lock = lock_ref_sha1_basic(refname, sha1, 0, &flag);
if (!lock)
return 1;
if (!(flag & REF_ISPACKED)) {
*/
ret |= repack_without_ref(refname);
- err = unlink(lock->log_file);
+ err = unlink(git_path("logs/%s", lock->ref_name));
if (err && errno != ENOENT)
fprintf(stderr, "warning: unlink(%s) failed: %s",
- lock->log_file, strerror(errno));
+ git_path("logs/%s", lock->ref_name), strerror(errno));
invalidate_cached_refs();
unlock_ref(lock);
return ret;
if (!is_refname_available(newref, oldref, get_loose_refs(), 0))
return 1;
- lock = lock_ref_sha1_basic(renamed_ref, NULL, NULL);
+ lock = lock_ref_sha1_basic(renamed_ref, NULL, 0, NULL);
if (!lock)
return error("unable to lock %s", renamed_ref);
lock->force_write = 1;
}
logmoved = log;
- lock = lock_ref_sha1_basic(newref, NULL, NULL);
+ lock = lock_ref_sha1_basic(newref, NULL, 0, NULL);
if (!lock) {
error("unable to lock %s for update", newref);
goto rollback;
goto rollback;
}
- if (!strncmp(oldref, "refs/heads/", 11) &&
- !strncmp(newref, "refs/heads/", 11)) {
- char oldsection[1024], newsection[1024];
-
- snprintf(oldsection, 1024, "branch.%s", oldref + 11);
- snprintf(newsection, 1024, "branch.%s", newref + 11);
- if (git_config_rename_section(oldsection, newsection) < 0)
- return 1;
- }
-
return 0;
rollback:
- lock = lock_ref_sha1_basic(oldref, NULL, NULL);
+ lock = lock_ref_sha1_basic(oldref, NULL, 0, NULL);
if (!lock) {
error("unable to lock %s for rollback", oldref);
goto rollbacklog;
rollback_lock_file(lock->lk);
}
free(lock->ref_name);
- free(lock->log_file);
+ free(lock->orig_ref_name);
free(lock);
}
-static int log_ref_write(struct ref_lock *lock,
- const unsigned char *sha1, const char *msg)
+static int log_ref_write(const char *ref_name, const unsigned char *old_sha1,
+ const unsigned char *new_sha1, const char *msg)
{
int logfd, written, oflags = O_APPEND | O_WRONLY;
unsigned maxlen, len;
int msglen;
- char *logrec;
+ char *log_file, *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);
+
if (log_all_ref_updates &&
- (!strncmp(lock->ref_name, "refs/heads/", 11) ||
- !strncmp(lock->ref_name, "refs/remotes/", 13))) {
- if (safe_create_leading_directories(lock->log_file) < 0)
+ (!prefixcmp(ref_name, "refs/heads/") ||
+ !prefixcmp(ref_name, "refs/remotes/") ||
+ !strcmp(ref_name, "HEAD"))) {
+ if (safe_create_leading_directories(log_file) < 0)
return error("unable to create directory for %s",
- lock->log_file);
+ log_file);
oflags |= O_CREAT;
}
- logfd = open(lock->log_file, oflags, 0666);
+ logfd = open(log_file, oflags, 0666);
if (logfd < 0) {
if (!(oflags & O_CREAT) && errno == ENOENT)
return 0;
if ((oflags & O_CREAT) && errno == EISDIR) {
- if (remove_empty_directories(lock->log_file)) {
+ if (remove_empty_directories(log_file)) {
return error("There are still logs under '%s'",
- lock->log_file);
+ log_file);
}
- logfd = open(lock->log_file, oflags, 0666);
+ logfd = open(log_file, oflags, 0666);
}
if (logfd < 0)
return error("Unable to append to %s: %s",
- lock->log_file, strerror(errno));
+ log_file, strerror(errno));
}
+ adjust_shared_perm(log_file);
+
msglen = 0;
if (msg) {
/* clean up the message and make sure it is a single line */
maxlen = strlen(committer) + msglen + 100;
logrec = xmalloc(maxlen);
len = sprintf(logrec, "%s %s %s\n",
- sha1_to_hex(lock->old_sha1),
- sha1_to_hex(sha1),
+ sha1_to_hex(old_sha1),
+ sha1_to_hex(new_sha1),
committer);
if (msglen)
len += sprintf(logrec + len - 1, "\t%.*s\n", msglen, msg) - 1;
free(logrec);
close(logfd);
if (written != len)
- return error("Unable to append to %s", lock->log_file);
+ return error("Unable to append to %s", log_file);
return 0;
}
return -1;
}
invalidate_cached_refs();
- if (log_ref_write(lock, sha1, logmsg) < 0) {
+ if (log_ref_write(lock->ref_name, lock->old_sha1, sha1, logmsg) < 0 ||
+ (strcmp(lock->ref_name, lock->orig_ref_name) &&
+ log_ref_write(lock->orig_ref_name, lock->old_sha1, sha1, logmsg) < 0)) {
unlock_ref(lock);
return -1;
}
+ if (strcmp(lock->orig_ref_name, "HEAD") != 0) {
+ /*
+ * Special hack: If a branch is updated directly and HEAD
+ * points to it (may happen on the remote side of a push
+ * for example) then logically the HEAD reflog should be
+ * updated too.
+ * A generic solution implies reverse symref information,
+ * but finding all symrefs pointing to the given branch
+ * would be rather costly for this rare event (the direct
+ * update of a branch) to be worth it. So let's cheat and
+ * check with HEAD only which should cover 99% of all usage
+ * scenarios (even 100% of the default ones).
+ */
+ unsigned char head_sha1[20];
+ int head_flag;
+ const char *head_ref;
+ head_ref = resolve_ref("HEAD", head_sha1, 1, &head_flag);
+ if (head_ref && (head_flag & REF_ISSYMREF) &&
+ !strcmp(head_ref, lock->ref_name))
+ log_ref_write("HEAD", lock->old_sha1, sha1, logmsg);
+ }
if (commit_lock_file(lock->lk)) {
error("Couldn't set %s", lock->ref_name);
unlock_ref(lock);
return 0;
}
+int create_symref(const char *ref_target, const char *refs_heads_master,
+ const char *logmsg)
+{
+ const char *lockpath;
+ char ref[1000];
+ int fd, len, written;
+ char *git_HEAD = xstrdup(git_path("%s", ref_target));
+ unsigned char old_sha1[20], new_sha1[20];
+
+ if (logmsg && read_ref(ref_target, old_sha1))
+ hashclr(old_sha1);
+
+ if (safe_create_leading_directories(git_HEAD) < 0)
+ return error("unable to create directory for %s", git_HEAD);
+
+#ifndef NO_SYMLINK_HEAD
+ if (prefer_symlink_refs) {
+ unlink(git_HEAD);
+ if (!symlink(refs_heads_master, git_HEAD))
+ goto done;
+ fprintf(stderr, "no symlink - falling back to symbolic ref\n");
+ }
+#endif
+
+ len = snprintf(ref, sizeof(ref), "ref: %s\n", refs_heads_master);
+ if (sizeof(ref) <= len) {
+ error("refname too long: %s", refs_heads_master);
+ goto error_free_return;
+ }
+ lockpath = mkpath("%s.lock", git_HEAD);
+ fd = open(lockpath, O_CREAT | O_EXCL | O_WRONLY, 0666);
+ if (fd < 0) {
+ error("Unable to open %s for writing", lockpath);
+ goto error_free_return;
+ }
+ written = write_in_full(fd, ref, len);
+ close(fd);
+ if (written != len) {
+ error("Unable to write to %s", lockpath);
+ goto error_unlink_return;
+ }
+ if (rename(lockpath, git_HEAD) < 0) {
+ error("Unable to create %s", git_HEAD);
+ goto error_unlink_return;
+ }
+ if (adjust_shared_perm(git_HEAD)) {
+ error("Unable to fix permissions on %s", lockpath);
+ error_unlink_return:
+ unlink(lockpath);
+ error_free_return:
+ free(git_HEAD);
+ return -1;
+ }
+
+#ifndef NO_SYMLINK_HEAD
+ done:
+#endif
+ if (logmsg && !read_ref(refs_heads_master, new_sha1))
+ log_ref_write(ref_target, old_sha1, new_sha1, logmsg);
+
+ free(git_HEAD);
+ return 0;
+}
+
static char *ref_msg(const char *line, const char *endp)
{
const char *ep;
unsigned long date;
unsigned char logged_sha1[20];
void *log_mapped;
+ size_t mapsz;
logfile = git_path("logs/%s", ref);
logfd = open(logfile, O_RDONLY, 0);
fstat(logfd, &st);
if (!st.st_size)
die("Log %s is empty.", logfile);
- log_mapped = xmmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, logfd, 0);
+ mapsz = xsize_t(st.st_size);
+ log_mapped = xmmap(NULL, mapsz, PROT_READ, MAP_PRIVATE, logfd, 0);
logdata = log_mapped;
close(logfd);
logfile, show_rfc2822_date(date, tz));
}
}
- munmap(log_mapped, st.st_size);
+ munmap(log_mapped, mapsz);
return 0;
}
lastrec = rec;
die("Log %s is corrupt.", logfile);
if (msg)
*msg = ref_msg(logdata, logend);
- munmap(log_mapped, st.st_size);
+ munmap(log_mapped, mapsz);
if (cutoff_time)
*cutoff_time = date;
!message || message[0] != ' ' ||
(message[1] != '+' && message[1] != '-') ||
!isdigit(message[2]) || !isdigit(message[3]) ||
- !isdigit(message[4]) || !isdigit(message[5]) ||
- message[6] != '\t')
+ !isdigit(message[4]) || !isdigit(message[5]))
continue; /* corrupt? */
email_end[1] = '\0';
tz = strtol(message + 1, NULL, 10);
- message += 7;
+ if (message[6] != '\t')
+ message += 6;
+ else
+ message += 7;
ret = fn(osha1, nsha1, buf+82, timestamp, tz, message, cb_data);
if (ret)
break;
return ret;
}
+static int do_for_each_reflog(const char *base, each_ref_fn fn, void *cb_data)
+{
+ DIR *dir = opendir(git_path("logs/%s", base));
+ int retval = 0;
+
+ if (dir) {
+ struct dirent *de;
+ int baselen = strlen(base);
+ char *log = xmalloc(baselen + 257);
+
+ memcpy(log, base, baselen);
+ if (baselen && base[baselen-1] != '/')
+ log[baselen++] = '/';
+
+ while ((de = readdir(dir)) != NULL) {
+ struct stat st;
+ int namelen;
+
+ if (de->d_name[0] == '.')
+ continue;
+ namelen = strlen(de->d_name);
+ if (namelen > 255)
+ continue;
+ if (has_extension(de->d_name, ".lock"))
+ continue;
+ memcpy(log + baselen, de->d_name, namelen+1);
+ if (stat(git_path("logs/%s", log), &st) < 0)
+ continue;
+ if (S_ISDIR(st.st_mode)) {
+ retval = do_for_each_reflog(log, fn, cb_data);
+ } else {
+ unsigned char sha1[20];
+ if (!resolve_ref(log, sha1, 0, NULL))
+ retval = error("bad ref for %s", log);
+ else
+ retval = fn(log, sha1, 0, cb_data);
+ }
+ if (retval)
+ break;
+ }
+ free(log);
+ closedir(dir);
+ }
+ else if (*base)
+ return errno;
+ return retval;
+}
+
+int for_each_reflog(each_ref_fn fn, void *cb_data)
+{
+ return do_for_each_reflog("", fn, cb_data);
+}