#include "refs.h"
#include "object.h"
#include "tag.h"
+#include "dir.h"
/* ISSYMREF=01 and ISPACKED=02 are public interfaces */
#define REF_KNOWS_PEELED 04
struct ref_list *loose;
struct ref_list *packed;
} cached_refs;
+static struct ref_list *current_ref;
+
+static struct ref_list *extra_refs;
static void free_ref_list(struct ref_list *list)
{
cached_refs->packed = sort_ref_list(list);
}
+void add_extra_ref(const char *name, const unsigned char *sha1, int flag)
+{
+ extra_refs = add_ref(name, sha1, flag, extra_refs, NULL);
+}
+
+void clear_extra_refs(void)
+{
+ free_ref_list(extra_refs);
+ extra_refs = NULL;
+}
+
static struct ref_list *get_packed_refs(void)
{
if (!cached_refs.did_packed) {
{
int len = strlen(path), retval;
char *gitdir;
+ const char *tmp;
while (len && path[len-1] == '/')
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);
+ memcpy(gitdir + len, "/.git", 6);
+ len += 5;
+
+ tmp = read_gitfile_gently(gitdir);
+ if (tmp) {
+ free(gitdir);
+ len = strlen(tmp);
+ gitdir = xmalloc(len + MAXREFLEN + 3);
+ memcpy(gitdir, tmp, len);
+ }
+ gitdir[len] = '/';
+ gitdir[++len] = '\0';
+ retval = resolve_gitlink_ref_recursive(gitdir, len, refname, result, 0);
free(gitdir);
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, len;
+ int depth = MAXDEPTH;
+ ssize_t len;
char buffer[256];
static char ref_buffer[256];
*flag = 0;
for (;;) {
- const char *path = git_path("%s", ref);
+ char path[PATH_MAX];
struct stat st;
char *buf;
int fd;
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) {
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);
}
unsigned char base[20];
struct object *o;
+ if (current_ref && (current_ref->name == ref
+ || !strcmp(current_ref->name, ref))) {
+ if (current_ref->flag & REF_KNOWS_PEELED) {
+ hashcpy(sha1, current_ref->peeled);
+ return 0;
+ }
+ hashcpy(base, current_ref->sha1);
+ goto fallback;
+ }
+
if (!resolve_ref(ref, base, 1, &flag))
return -1;
}
}
- /* fallback - callers should not call this for unpacked refs */
+fallback:
o = parse_object(base);
- if (o->type == OBJ_TAG) {
+ if (o && o->type == OBJ_TAG) {
o = deref_tag(o, ref, 0);
if (o) {
hashcpy(sha1, o->sha1);
static int do_for_each_ref(const char *base, each_ref_fn fn, int trim,
void *cb_data)
{
- int retval;
+ int retval = 0;
struct ref_list *packed = get_packed_refs();
struct ref_list *loose = get_loose_refs();
+ struct ref_list *extra;
+
+ for (extra = extra_refs; extra; extra = extra->next)
+ retval = do_one_ref(base, fn, trim, cb_data, extra);
+
while (packed && loose) {
struct ref_list *entry;
int cmp = strcmp(packed->name, loose->name);
}
retval = do_one_ref(base, fn, trim, cb_data, entry);
if (retval)
- return retval;
+ goto end_each;
}
for (packed = packed ? packed : loose; packed; packed = packed->next) {
retval = do_one_ref(base, fn, trim, cb_data, packed);
if (retval)
- return retval;
+ goto end_each;
}
- return 0;
+
+end_each:
+ current_ref = NULL;
+ return retval;
}
int head_ref(each_ref_fn fn, void *cb_data)
return do_for_each_ref("refs/remotes/", fn, 13, cb_data);
}
-/* NEEDSWORK: This is only used by ssh-upload and it should go; the
- * caller should do resolve_ref or read_ref like everybody else. Or
- * maybe everybody else should use get_ref_sha1() instead of doing
- * read_ref().
- */
-int get_ref_sha1(const char *ref, unsigned char *sha1)
-{
- if (check_ref_format(ref))
- return -1;
- return read_ref(mkpath("refs/%s", ref), sha1);
-}
-
/*
* Make sure "ref" is something reasonable to have under ".git/refs/";
* We do not like it if:
while ((ch = *cp++) == '/')
; /* tolerate duplicated slashes */
if (!ch)
- return -1; /* should not end with slashes */
+ /* should not end with slashes */
+ return CHECK_REF_FORMAT_ERROR;
/* we are at the beginning of the path component */
if (ch == '.')
- return -1;
+ return CHECK_REF_FORMAT_ERROR;
bad_type = bad_ref_char(ch);
if (bad_type) {
- return (bad_type == 2 && !*cp) ? -3 : -1;
+ return (bad_type == 2 && !*cp)
+ ? CHECK_REF_FORMAT_WILDCARD
+ : 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) ? -3 : -1;
+ return (bad_type == 2 && !*cp)
+ ? CHECK_REF_FORMAT_WILDCARD
+ : CHECK_REF_FORMAT_ERROR;
}
if (ch == '/')
break;
if (ch == '.' && *cp == '.')
- return -1;
+ return CHECK_REF_FORMAT_ERROR;
}
level++;
if (!ch) {
if (level < 2)
- return -2; /* at least of form "heads/blah" */
- return 0;
+ return CHECK_REF_FORMAT_ONELEVEL;
+ return CHECK_REF_FORMAT_OK;
+ }
+ }
+}
+
+const char *ref_rev_parse_rules[] = {
+ "%.*s",
+ "refs/%.*s",
+ "refs/tags/%.*s",
+ "refs/heads/%.*s",
+ "refs/remotes/%.*s",
+ "refs/remotes/%.*s/HEAD",
+ NULL
+};
+
+const char *ref_fetch_rules[] = {
+ "%.*s",
+ "refs/%.*s",
+ "refs/heads/%.*s",
+ NULL
+};
+
+int refname_match(const char *abbrev_name, const char *full_name, const char **rules)
+{
+ const char **p;
+ const int abbrev_name_len = strlen(abbrev_name);
+
+ for (p = rules; *p; p++) {
+ if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name))) {
+ return 1;
}
}
+
+ return 0;
}
static struct ref_lock *verify_lock(struct ref_lock *lock,
return lock;
}
-static int remove_empty_dir_recursive(char *path, int len)
-{
- DIR *dir = opendir(path);
- struct dirent *e;
- int ret = 0;
-
- if (!dir)
- return -1;
- if (path[len-1] != '/')
- path[len++] = '/';
- while ((e = readdir(dir)) != NULL) {
- struct stat st;
- int namlen;
- if ((e->d_name[0] == '.') &&
- ((e->d_name[1] == 0) ||
- ((e->d_name[1] == '.') && e->d_name[2] == 0)))
- continue; /* "." and ".." */
-
- namlen = strlen(e->d_name);
- if ((len + namlen < PATH_MAX) &&
- strcpy(path + len, e->d_name) &&
- !lstat(path, &st) &&
- S_ISDIR(st.st_mode) &&
- !remove_empty_dir_recursive(path, len + namlen))
- continue; /* happy */
-
- /* path too long, stat fails, or non-directory still exists */
- ret = -1;
- break;
- }
- closedir(dir);
- if (!ret) {
- path[len] = 0;
- ret = rmdir(path);
- }
- return ret;
-}
-
-static int remove_empty_directories(char *file)
+static int remove_empty_directories(const char *file)
{
/* we want to create a file but there is a directory there;
* if that is an empty directory (or a directory that contains
* only empty directories), remove them.
*/
- char path[PATH_MAX];
- int len = strlen(file);
+ struct strbuf path;
+ int result;
- if (len >= PATH_MAX) /* path too long ;-) */
- return -1;
- strcpy(path, file);
- return remove_empty_dir_recursive(path, len);
+ strbuf_init(&path, 20);
+ strbuf_addstr(&path, file);
+
+ result = remove_dir_recursively(&path, 1);
+
+ strbuf_release(&path);
+
+ return result;
}
static int is_refname_available(const char *ref, const char *oldref,
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;
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;
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:
struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1, int flags)
{
- if (check_ref_format(ref) == -1)
+ switch (check_ref_format(ref)) {
+ default:
return NULL;
- return lock_ref_sha1_basic(ref, old_sha1, flags, NULL);
+ case 0:
+ case CHECK_REF_FORMAT_ONELEVEL:
+ return lock_ref_sha1_basic(ref, old_sha1, flags, NULL);
+ }
}
static struct lock_file packlock;
die("too long a refname '%s'", list->name);
write_or_die(fd, line, len);
}
- close(fd);
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);
- if (err) {
+ 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
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))
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);
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)) {
return 1;
}
+int close_ref(struct ref_lock *lock)
+{
+ if (close_lock_file(lock->lk))
+ return -1;
+ lock->lock_fd = -1;
+ return 0;
+}
+
+int commit_ref(struct ref_lock *lock)
+{
+ if (commit_lock_file(lock->lk))
+ return -1;
+ lock->lock_fd = -1;
+ return 0;
+}
+
void unlock_ref(struct ref_lock *lock)
{
- if (lock->lock_fd >= 0) {
- close(lock->lock_fd);
- /* Do not free lock->lk -- atexit() still looks at them */
- if (lock->lk)
- rollback_lock_file(lock->lk);
- }
+ /* Do not free lock->lk -- atexit() still looks at them */
+ if (lock->lk)
+ rollback_lock_file(lock->lk);
free(lock->ref_name);
free(lock->orig_ref_name);
free(lock);
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/") ||
adjust_shared_perm(log_file);
msglen = msg ? strlen(msg) : 0;
- committer = git_committer_info(-1);
+ committer = git_committer_info(0);
maxlen = strlen(committer) + msglen + 100;
logrec = xmalloc(maxlen);
len = sprintf(logrec, "%s %s %s\n",
return 0;
}
+static int is_branch(const char *refname)
+{
+ return !strcmp(refname, "HEAD") || !prefixcmp(refname, "refs/heads/");
+}
+
int write_ref_sha1(struct ref_lock *lock,
const unsigned char *sha1, const char *logmsg)
{
static char term = '\n';
+ struct object *o;
if (!lock)
return -1;
unlock_ref(lock);
return 0;
}
+ o = parse_object(sha1);
+ if (!o) {
+ error("Trying to write ref %s with nonexistant object %s",
+ lock->ref_name, sha1_to_hex(sha1));
+ unlock_ref(lock);
+ return -1;
+ }
+ if (o->type != OBJ_COMMIT && is_branch(lock->ref_name)) {
+ error("Trying to write non-commit object %s to branch %s",
+ sha1_to_hex(sha1), lock->ref_name);
+ unlock_ref(lock);
+ return -1;
+ }
if (write_in_full(lock->lock_fd, sha1_to_hex(sha1), 40) != 40 ||
write_in_full(lock->lock_fd, &term, 1) != 1
- || close(lock->lock_fd) < 0) {
+ || close_ref(lock) < 0) {
error("Couldn't write %s", lock->lk->filename);
unlock_ref(lock);
return -1;
!strcmp(head_ref, lock->ref_name))
log_ref_write("HEAD", lock->old_sha1, sha1, logmsg);
}
- if (commit_lock_file(lock->lk)) {
+ if (commit_ref(lock)) {
error("Couldn't set %s", lock->ref_name);
unlock_ref(lock);
return -1;
}
- lock->lock_fd = -1;
unlock_ref(lock);
return 0;
}
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))
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);
}
return 0;
}
+
+struct ref *find_ref_by_name(struct ref *list, const char *name)
+{
+ for ( ; list; list = list->next)
+ if (!strcmp(list->name, name))
+ return list;
+ return NULL;
+}