static void check_notes_merge_worktree(struct notes_merge_options *o)
{
if (!o->has_worktree) {
/*
* Must establish NOTES_MERGE_WORKTREE.
* Abort if NOTES_MERGE_WORKTREE already exists
*/
if (file_exists(git_path(NOTES_MERGE_WORKTREE))) {
if (advice_resolve_conflict)
die("You have not concluded your previous "
"notes merge (%s exists).\nPlease, use "
"'git notes merge --commit' or 'git notes "
"merge --abort' to commit/abort the "
"previous merge before you start a new "
"notes merge.", git_path("NOTES_MERGE_*"));
else
die("You have not concluded your notes merge "
"(%s exists).", git_path("NOTES_MERGE_*"));
}
if (safe_create_leading_directories(git_path(
NOTES_MERGE_WORKTREE "/.test")))
die_errno("unable to create directory %s",
git_path(NOTES_MERGE_WORKTREE));
o->has_worktree = 1;
} else if (!file_exists(git_path(NOTES_MERGE_WORKTREE)))
/* NOTES_MERGE_WORKTREE should already be established */
die("missing '%s'. This should not happen",
git_path(NOTES_MERGE_WORKTREE));
}
static void write_buf_to_worktree(const unsigned char *obj,
const char *buf, unsigned long size)
{
int fd;
char *path = git_path(NOTES_MERGE_WORKTREE "/%s", sha1_to_hex(obj));
if (safe_create_leading_directories(path))
die_errno("unable to create directory for '%s'", path);
if (file_exists(path))
die("found existing file at '%s'", path);
fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, 0666);
if (fd < 0)
die_errno("failed to open '%s'", path);
while (size > 0) {
long ret = write_in_full(fd, buf, size);
if (ret < 0) {
/* Ignore epipe */
if (errno == EPIPE)
break;
die_errno("notes-merge");
} else if (!ret) {
die("notes-merge: disk full?");
}
size -= ret;
buf += ret;
}
close(fd);
}
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 *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 &&
(!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",
log_file);
oflags |= O_CREAT;
}
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(log_file)) {
return error("There are still logs under '%s'",
log_file);
}
logfd = open(log_file, oflags, 0666);
}
if (logfd < 0)
return error("Unable to append to %s: %s",
log_file, strerror(errno));
}
adjust_shared_perm(log_file);
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(old_sha1),
sha1_to_hex(new_sha1),
committer);
if (msglen)
len += copy_msg(logrec + len - 1, msg) - 1;
written = len <= maxlen ? write_in_full(logfd, logrec, len) : -1;
free(logrec);
if (close(logfd) != 0 || written != len)
return error("Unable to append to %s", log_file);
return 0;
}
static int copy_file(const char *source, char *dest, const char *hex,
int warn_if_not_exists)
{
safe_create_leading_directories(dest);
if (use_link) {
if (!link(source, dest)) {
pull_say("link %s\n", hex);
return 0;
}
/* If we got ENOENT there is no point continuing. */
if (errno == ENOENT) {
if (warn_if_not_exists)
fprintf(stderr, "does not exist %s\n", source);
return -1;
}
}
if (use_symlink) {
struct stat st;
if (stat(source, &st)) {
if (!warn_if_not_exists && errno == ENOENT)
return -1;
fprintf(stderr, "cannot stat %s: %s\n", source,
strerror(errno));
return -1;
}
if (!symlink(source, dest)) {
pull_say("symlink %s\n", hex);
return 0;
}
}
if (use_filecopy) {
int ifd, ofd, status = 0;
ifd = open(source, O_RDONLY);
if (ifd < 0) {
if (!warn_if_not_exists && errno == ENOENT)
return -1;
fprintf(stderr, "cannot open %s\n", source);
return -1;
}
ofd = open(dest, O_WRONLY | O_CREAT | O_EXCL, 0666);
if (ofd < 0) {
fprintf(stderr, "cannot open %s\n", dest);
close(ifd);
return -1;
}
status = copy_fd(ifd, ofd);
close(ofd);
if (status)
fprintf(stderr, "cannot write %s\n", dest);
else
pull_say("copy %s\n", hex);
return status;
}
fprintf(stderr, "failed to copy %s with given copy methods.\n", hex);
return -1;
}
static int ensure_leading_directories(char *path)
{
switch (safe_create_leading_directories(path)) {
case SCLD_OK:
case SCLD_EXISTS:
return 0;
default:
return error(_("could not create leading directories "
"of '%s'"), path);
}
}
static int write_one_ref(const char *name, const unsigned char *sha1,
int flags, void *data)
{
struct strbuf *buf = data;
int len = buf->len;
/* when called via for_each_ref(), flags is non-zero */
if (flags && !starts_with(name, "refs/heads/") &&
!starts_with(name, "refs/tags/"))
return 0;
strbuf_addstr(buf, name);
if (safe_create_leading_directories(buf->buf) ||
write_file(buf->buf, 0, "%s\n", sha1_to_hex(sha1)))
return error("problems writing temporary file %s: %s",
buf->buf, strerror(errno));
strbuf_setlen(buf, len);
return 0;
}
static int write_one_ref(const char *name, const unsigned char *sha1,
int flags, void *data)
{
struct strbuf *buf = data;
int len = buf->len;
FILE *f;
/* when called via for_each_ref(), flags is non-zero */
if (flags && prefixcmp(name, "refs/heads/") &&
prefixcmp(name, "refs/tags/"))
return 0;
strbuf_addstr(buf, name);
if (safe_create_leading_directories(buf->buf) ||
!(f = fopen(buf->buf, "w")) ||
fprintf(f, "%s\n", sha1_to_hex(sha1)) < 0 ||
fclose(f))
return error("problems writing temporary file %s", buf->buf);
strbuf_setlen(buf, len);
return 0;
}
int log_ref_setup(const char *ref_name, char *logfile, int bufsize)
{
int logfd, oflags = O_APPEND | O_WRONLY;
git_snpath(logfile, bufsize, "logs/%s", ref_name);
if (log_all_ref_updates &&
(!prefixcmp(ref_name, "refs/heads/") ||
!prefixcmp(ref_name, "refs/remotes/") ||
!prefixcmp(ref_name, "refs/notes/") ||
!strcmp(ref_name, "HEAD"))) {
if (safe_create_leading_directories(logfile) < 0)
return error("unable to create directory for %s",
logfile);
oflags |= O_CREAT;
}
logfd = open(logfile, oflags, 0666);
if (logfd < 0) {
if (!(oflags & O_CREAT) && errno == ENOENT)
return 0;
if ((oflags & O_CREAT) && errno == EISDIR) {
if (remove_empty_directories(logfile)) {
return error("There are still logs under '%s'",
logfile);
}
logfd = open(logfile, oflags, 0666);
}
if (logfd < 0)
return error("Unable to append to %s: %s",
logfile, strerror(errno));
}
adjust_shared_perm(logfile);
close(logfd);
return 0;
}
/*
* Create the file "path" by writing to a temporary file and renaming
* it into place. The contents of the file come from "generate", which
* should return non-zero if it encounters an error.
*/
static int update_info_file(char *path, int (*generate)(FILE *))
{
char *tmp = mkpathdup("%s_XXXXXX", path);
int ret = -1;
int fd = -1;
FILE *fp = NULL;
safe_create_leading_directories(path);
fd = git_mkstemp_mode(tmp, 0666);
if (fd < 0)
goto out;
fp = fdopen(fd, "w");
if (!fp)
goto out;
ret = generate(fp);
if (ret)
goto out;
if (fclose(fp))
goto out;
if (adjust_shared_perm(tmp) < 0)
goto out;
if (rename(tmp, path) < 0)
goto out;
ret = 0;
out:
if (ret) {
error_errno("unable to update %s", path);
if (fp)
fclose(fp);
else if (fd >= 0)
close(fd);
unlink(tmp);
}
free(tmp);
return ret;
}
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 = git_pathdup("%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);
if (close(fd) != 0 || 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_or_warn(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;
}
int rename_ref(const char *oldref, const char *newref, const char *logmsg)
{
static const char renamed_ref[] = "RENAMED-REF";
unsigned char sha1[20], orig_sha1[20];
int flag = 0, logmoved = 0;
struct ref_lock *lock;
struct stat loginfo;
int log = !lstat(git_path("logs/%s", oldref), &loginfo);
const char *symref = NULL;
if (log && S_ISLNK(loginfo.st_mode))
return error("reflog for %s is a symlink", oldref);
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(NULL), 0))
return 1;
if (!is_refname_available(newref, oldref, get_loose_refs(NULL), 0))
return 1;
lock = lock_ref_sha1_basic(renamed_ref, NULL, 0, NULL);
if (!lock)
return error("unable to lock %s", renamed_ref);
lock->force_write = 1;
if (write_ref_sha1(lock, orig_sha1, logmsg))
return error("unable to save current sha1 in %s", renamed_ref);
if (log && rename(git_path("logs/%s", oldref), git_path(TMP_RENAMED_LOG)))
return error("unable to move logfile logs/%s to "TMP_RENAMED_LOG": %s",
oldref, strerror(errno));
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, REF_NODEREF)) {
if (errno==EISDIR) {
if (remove_empty_directories(git_path("%s", newref))) {
error("Directory not empty: %s", newref);
goto rollback;
}
} else {
error("unable to delete existing %s", newref);
goto rollback;
}
}
if (log && safe_create_leading_directories(git_path("logs/%s", newref))) {
error("unable to create directory for %s", newref);
goto rollback;
}
retry:
if (log && rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", newref))) {
if (errno==EISDIR || errno==ENOTDIR) {
/*
* rename(a, b) when b is an existing
* directory ought to result in ISDIR, but
* Solaris 5.8 gives ENOTDIR. Sheesh.
*/
if (remove_empty_directories(git_path("logs/%s", newref))) {
error("Directory not empty: logs/%s", newref);
goto rollback;
}
goto retry;
} else {
error("unable to move logfile "TMP_RENAMED_LOG" to logs/%s: %s",
newref, strerror(errno));
goto rollback;
}
}
logmoved = log;
lock = lock_ref_sha1_basic(newref, NULL, 0, NULL);
if (!lock) {
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)) {
error("unable to write current sha1 into %s", newref);
goto rollback;
}
return 0;
rollback:
lock = lock_ref_sha1_basic(oldref, NULL, 0, NULL);
if (!lock) {
error("unable to lock %s for rollback", oldref);
goto rollbacklog;
}
lock->force_write = 1;
flag = log_all_ref_updates;
log_all_ref_updates = 0;
if (write_ref_sha1(lock, orig_sha1, NULL))
error("unable to write current sha1 into %s", oldref);
log_all_ref_updates = flag;
rollbacklog:
if (logmoved && rename(git_path("logs/%s", newref), git_path("logs/%s", oldref)))
error("unable to restore logfile %s from %s: %s",
oldref, newref, strerror(errno));
if (!logmoved && log &&
rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", oldref)))
error("unable to restore logfile %s from "TMP_RENAMED_LOG": %s",
oldref, strerror(errno));
return 1;
}
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;
int last_errno = 0;
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;
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;
* it is normal for the empty directory 'foo'
* to remain.
*/
ref_file = git_path("%s", orig_ref);
if (remove_empty_directories(ref_file)) {
last_errno = errno;
error("there are still refs under '%s'", orig_ref);
goto error_return;
}
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",
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 (missing &&
!is_refname_available(ref, NULL, get_packed_refs(NULL), 0)) {
last_errno = ENOTDIR;
goto error_return;
}
lock->lk = xcalloc(1, sizeof(struct lock_file));
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 (missing)
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;
error("unable to create directory for %s", ref_file);
goto error_return;
}
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:
unlock_ref(lock);
errno = last_errno;
return NULL;
}
