index 1b0050eee4e037aec8396edd0ff6c14bda5985a2..024211d72b5e21e1c87e98b0f7e3a6982525d82d 100644 (file)
--- a/refs.c
+++ b/refs.c
} cached_refs;
static struct ref_list *current_ref;
+static struct ref_list *extra_refs;
+
static void free_ref_list(struct ref_list *list)
{
struct ref_list *next;
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) {
@@ -352,6 +365,7 @@ int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *re
{
int len = strlen(path), retval;
char *gitdir;
+ const char *tmp;
while (len && path[len-1] == '/')
len--;
@@ -359,16 +373,39 @@ int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *re
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];
@@ -376,7 +413,7 @@ 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;
@@ -384,13 +421,8 @@ 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) {
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);
@@ -758,10 +795,10 @@ 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;
@@ -789,23 +826,27 @@ 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;
@@ -815,8 +856,8 @@ 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:
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)) {
@@ -1091,13 +1144,14 @@ 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/") ||
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))
@@ -1382,6 +1436,10 @@ 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);
@@ -1395,7 +1453,7 @@ 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;
@@ -1406,6 +1464,16 @@ 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;
@@ -1439,6 +1507,11 @@ 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));