#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
* Future: need to be in "struct repository"
* when doing a full libification.
*/
-struct cached_refs {
+static struct cached_refs {
char did_loose;
char did_packed;
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;
}
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];
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:
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;
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 == '.' || bad_ref_char(ch))
- return -1;
+ if (ch == '.')
+ 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;
+ }
/* 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)
+ ? 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,
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->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)
+ switch (check_ref_format(ref)) {
+ default:
return NULL;
- return lock_ref_sha1_basic(ref, old_sha1, NULL);
+ case 0:
+ case CHECK_REF_FORMAT_ONELEVEL:
+ return lock_ref_sha1_basic(ref, old_sha1, flags, NULL);
+ }
}
static struct lock_file packlock;
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)) {
i = strlen(lock->lk->filename) - 5; /* .lock */
lock->lk->filename[i] = 0;
err = unlink(lock->lk->filename);
- if (err) {
+ if (err && errno != ENOENT) {
ret = 1;
error("unlink(%s) failed: %s",
lock->lk->filename, strerror(errno));
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;
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;
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);
}
+/*
+ * 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.
+ */
+static int copy_msg(char *buf, const char *msg)
+{
+ char *cp = buf;
+ char c;
+ int wasspace = 1;
+
+ *cp++ = '\t';
+ while ((c = *msg++)) {
+ if (wasspace && isspace(c))
+ continue;
+ wasspace = isspace(c);
+ if (wasspace)
+ c = ' ';
+ *cp++ = c;
+ }
+ while (buf < cp && isspace(cp[-1]))
+ cp--;
+ *cp++ = '\n';
+ return cp - buf;
+}
+
static int log_ref_write(const char *ref_name, const unsigned char *old_sha1,
const unsigned char *new_sha1, const char *msg)
{
adjust_shared_perm(log_file);
- msglen = 0;
- if (msg) {
- /* clean up the message and make sure it is a single line */
- for ( ; *msg; msg++)
- if (!isspace(*msg))
- break;
- if (*msg) {
- const char *ep = strchr(msg, '\n');
- if (ep)
- msglen = ep - msg;
- else
- msglen = strlen(msg);
- }
- }
-
- committer = git_committer_info(-1);
+ msglen = msg ? strlen(msg) : 0;
+ committer = git_committer_info(0);
maxlen = strlen(committer) + msglen + 100;
logrec = xmalloc(maxlen);
len = sprintf(logrec, "%s %s %s\n",
sha1_to_hex(new_sha1),
committer);
if (msglen)
- len += sprintf(logrec + len - 1, "\t%.*s\n", msglen, msg) - 1;
+ len += copy_msg(logrec + len - 1, msg) - 1;
written = len <= maxlen ? write_in_full(logfd, logrec, len) : -1;
free(logrec);
- close(logfd);
- if (written != len)
+ if (close(logfd) != 0 || written != len)
return error("Unable to append to %s", log_file);
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;
}
goto error_free_return;
}
written = write_in_full(fd, ref, len);
- close(fd);
- if (written != len) {
+ if (close(fd) != 0 || written != len) {
error("Unable to write to %s", lockpath);
goto error_unlink_return;
}
static char *ref_msg(const char *line, const char *endp)
{
const char *ep;
- char *msg;
-
line += 82;
- for (ep = line; ep < endp && *ep != '\n'; ep++)
- ;
- msg = xmalloc(ep - line + 1);
- memcpy(msg, line, ep - line);
- msg[ep - line] = 0;
- return msg;
+ ep = memchr(line, '\n', endp - line);
+ if (!ep)
+ ep = endp;
+ return xmemdupz(line, ep - line);
}
int read_ref_at(const char *ref, unsigned long at_time, int cnt, unsigned char *sha1, char **msg, unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt)
if (hashcmp(logged_sha1, sha1)) {
fprintf(stderr,
"warning: Log %s has gap after %s.\n",
- logfile, show_rfc2822_date(date, tz));
+ logfile, show_date(date, tz, DATE_RFC2822));
}
}
else if (date == at_time) {
if (hashcmp(logged_sha1, sha1)) {
fprintf(stderr,
"warning: Log %s unexpectedly ended on %s.\n",
- logfile, show_rfc2822_date(date, tz));
+ logfile, show_date(date, tz, DATE_RFC2822));
}
}
munmap(log_mapped, mapsz);
{
return do_for_each_reflog("", fn, cb_data);
}
+
+int update_ref(const char *action, const char *refname,
+ const unsigned char *sha1, const unsigned char *oldval,
+ int flags, enum action_on_err onerr)
+{
+ static struct ref_lock *lock;
+ lock = lock_any_ref_for_update(refname, oldval, flags);
+ if (!lock) {
+ const char *str = "Cannot lock the ref '%s'.";
+ switch (onerr) {
+ case MSG_ON_ERR: error(str, refname); break;
+ case DIE_ON_ERR: die(str, refname); break;
+ case QUIET_ON_ERR: break;
+ }
+ return 1;
+ }
+ if (write_ref_sha1(lock, sha1, action) < 0) {
+ const char *str = "Cannot update the ref '%s'.";
+ switch (onerr) {
+ case MSG_ON_ERR: error(str, refname); break;
+ case DIE_ON_ERR: die(str, refname); break;
+ case QUIET_ON_ERR: break;
+ }
+ return 1;
+ }
+ 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;
+}