<tagname> [<commit> | <object>]
'git tag' -d <tagname>...
'git tag' [-n[<num>]] -l [--contains <commit>] [--points-at <object>]
- [--column[=<options>] | --no-column] [<pattern>...]
+ [--column[=<options>] | --no-column] [
--create-reflog] [<pattern>...]
- [<pattern>...]
'git tag' -v <tagname>...
DESCRIPTION
all, 'whitespace' removes just leading/trailing whitespace lines and
'strip' removes both whitespace and commentary.
+ --create-reflog::
+ Create a reflog for the tag.
+
<tagname>::
The name of the tag to create, delete, or describe.
The new tag name must pass all checks defined by
#include "ll-merge.h"
#include "resolve-undo.h"
#include "submodule.h"
-#include "argv-array.h"
-#include "sigchain.h"
static const char * const checkout_usage[] = {
N_("git checkout [<options>] <branch>"),
struct pathspec pathspec;
struct tree *source_tree;
- const char *new_worktree;
- const char **saved_argv;
int new_worktree_mode;
};
die(_("Cannot update paths and switch to branch '%s' at the same time."),
opts->new_branch);
- if (opts->new_worktree)
- die(_("'%s' cannot be used with updating paths"), "--to");
-
if (opts->patch_mode)
return run_add_interactive(revision, "--patch=checkout",
&opts->pathspec);
if (opts->new_branch) {
if (opts->new_orphan_branch) {
if (opts->new_branch_log && !log_all_ref_updates) {
- int temp;
- struct strbuf log_file = STRBUF_INIT;
int ret;
- const char *ref_name;
-
- ref_name = mkpath("refs/heads/%s", opts->new_orphan_branch);
- temp = log_all_ref_updates;
- log_all_ref_updates = 1;
- ret = log_ref_setup(ref_name, &log_file);
- log_all_ref_updates = temp;
- strbuf_release(&log_file);
+ char *refname;
+ struct strbuf err = STRBUF_INIT;
+
+ refname = mkpathdup("refs/heads/%s", opts->new_orphan_branch);
+ ret = safe_create_reflog(refname, 1, &err);
+ free(refname);
if (ret) {
- fprintf(stderr, _("Can not do reflog for '%s'\n"),
- opts->new_orphan_branch);
+ fprintf(stderr, _("Can not do reflog for '%s': %s\n"),
+ opts->new_orphan_branch, err.buf);
+ strbuf_release(&err);
return;
}
+ strbuf_release(&err);
}
}
else
return ret || writeout_error;
}
-static char *junk_work_tree;
-static char *junk_git_dir;
-static int is_junk;
-static pid_t junk_pid;
-
-static void remove_junk(void)
-{
- struct strbuf sb = STRBUF_INIT;
- if (!is_junk || getpid() != junk_pid)
- return;
- if (junk_git_dir) {
- strbuf_addstr(&sb, junk_git_dir);
- remove_dir_recursively(&sb, 0);
- strbuf_reset(&sb);
- }
- if (junk_work_tree) {
- strbuf_addstr(&sb, junk_work_tree);
- remove_dir_recursively(&sb, 0);
- }
- strbuf_release(&sb);
-}
-
-static void remove_junk_on_signal(int signo)
-{
- remove_junk();
- sigchain_pop(signo);
- raise(signo);
-}
-
-static int prepare_linked_checkout(const struct checkout_opts *opts,
- struct branch_info *new)
-{
- struct strbuf sb_git = STRBUF_INIT, sb_repo = STRBUF_INIT;
- struct strbuf sb = STRBUF_INIT;
- const char *path = opts->new_worktree, *name;
- struct stat st;
- struct child_process cp;
- int counter = 0, len, ret;
-
- if (!new->commit)
- die(_("no branch specified"));
- if (file_exists(path) && !is_empty_dir(path))
- die(_("'%s' already exists"), path);
-
- len = strlen(path);
- while (len && is_dir_sep(path[len - 1]))
- len--;
-
- for (name = path + len - 1; name > path; name--)
- if (is_dir_sep(*name)) {
- name++;
- break;
- }
- strbuf_addstr(&sb_repo,
- git_path("worktrees/%.*s", (int)(path + len - name), name));
- len = sb_repo.len;
- if (safe_create_leading_directories_const(sb_repo.buf))
- die_errno(_("could not create leading directories of '%s'"),
- sb_repo.buf);
- while (!stat(sb_repo.buf, &st)) {
- counter++;
- strbuf_setlen(&sb_repo, len);
- strbuf_addf(&sb_repo, "%d", counter);
- }
- name = strrchr(sb_repo.buf, '/') + 1;
-
- junk_pid = getpid();
- atexit(remove_junk);
- sigchain_push_common(remove_junk_on_signal);
-
- if (mkdir(sb_repo.buf, 0777))
- die_errno(_("could not create directory of '%s'"), sb_repo.buf);
- junk_git_dir = xstrdup(sb_repo.buf);
- is_junk = 1;
-
- /*
- * lock the incomplete repo so prune won't delete it, unlock
- * after the preparation is over.
- */
- strbuf_addf(&sb, "%s/locked", sb_repo.buf);
- write_file(sb.buf, 1, "initializing\n");
-
- strbuf_addf(&sb_git, "%s/.git", path);
- if (safe_create_leading_directories_const(sb_git.buf))
- die_errno(_("could not create leading directories of '%s'"),
- sb_git.buf);
- junk_work_tree = xstrdup(path);
-
- strbuf_reset(&sb);
- strbuf_addf(&sb, "%s/gitdir", sb_repo.buf);
- write_file(sb.buf, 1, "%s\n", real_path(sb_git.buf));
- write_file(sb_git.buf, 1, "gitdir: %s/worktrees/%s\n",
- real_path(get_git_common_dir()), name);
- /*
- * This is to keep resolve_ref() happy. We need a valid HEAD
- * or is_git_directory() will reject the directory. Any valid
- * value would do because this value will be ignored and
- * replaced at the next (real) checkout.
- */
- strbuf_reset(&sb);
- strbuf_addf(&sb, "%s/HEAD", sb_repo.buf);
- write_file(sb.buf, 1, "%s\n", sha1_to_hex(new->commit->object.sha1));
- strbuf_reset(&sb);
- strbuf_addf(&sb, "%s/commondir", sb_repo.buf);
- write_file(sb.buf, 1, "../..\n");
-
- if (!opts->quiet)
- fprintf_ln(stderr, _("Enter %s (identifier %s)"), path, name);
-
- setenv("GIT_CHECKOUT_NEW_WORKTREE", "1", 1);
- setenv(GIT_DIR_ENVIRONMENT, sb_git.buf, 1);
- setenv(GIT_WORK_TREE_ENVIRONMENT, path, 1);
- memset(&cp, 0, sizeof(cp));
- cp.git_cmd = 1;
- cp.argv = opts->saved_argv;
- ret = run_command(&cp);
- if (!ret) {
- is_junk = 0;
- free(junk_work_tree);
- free(junk_git_dir);
- junk_work_tree = NULL;
- junk_git_dir = NULL;
- }
- strbuf_reset(&sb);
- strbuf_addf(&sb, "%s/locked", sb_repo.buf);
- unlink_or_warn(sb.buf);
- strbuf_release(&sb);
- strbuf_release(&sb_repo);
- strbuf_release(&sb_git);
- return ret;
-}
-
static int git_checkout_config(const char *var, const char *value, void *cb)
{
if (!strcmp(var, "diff.ignoresubmodules")) {
{
struct tree **source_tree = &opts->source_tree;
const char **new_branch = &opts->new_branch;
- int force_detach = opts->force_detach;
int argcount = 0;
unsigned char branch_rev[20];
const char *arg;
else
new->path = NULL; /* not an existing branch */
- if (new->path && !force_detach && !*new_branch) {
- unsigned char sha1[20];
- int flag;
- char *head_ref = resolve_refdup("HEAD", 0, sha1, &flag);
- if (head_ref &&
- (!(flag & REF_ISSYMREF) || strcmp(head_ref, new->path)) &&
- !opts->ignore_other_worktrees)
- check_linked_checkouts(new);
- free(head_ref);
- }
-
new->commit = lookup_commit_reference_gently(rev, 1);
if (!new->commit) {
/* not a commit */
die(_("Cannot switch branch to a non-commit '%s'"),
new->name);
- if (opts->new_worktree)
- return prepare_linked_checkout(opts, new);
+ if (new->path && !opts->force_detach && !opts->new_branch) {
+ unsigned char sha1[20];
+ int flag;
+ char *head_ref = resolve_refdup("HEAD", 0, sha1, &flag);
+ if (head_ref &&
+ (!(flag & REF_ISSYMREF) || strcmp(head_ref, new->path)) &&
+ !opts->ignore_other_worktrees)
+ check_linked_checkouts(new);
+ free(head_ref);
+ }
if (!new->commit && opts->new_branch) {
unsigned char rev[20];
N_("do not limit pathspecs to sparse entries only")),
OPT_HIDDEN_BOOL(0, "guess", &dwim_new_local_branch,
N_("second guess 'git checkout <no-such-branch>'")),
- OPT_FILENAME(0, "to", &opts.new_worktree,
- N_("check a branch out in a separate working directory")),
OPT_BOOL(0, "ignore-other-worktrees", &opts.ignore_other_worktrees,
N_("do not check if another worktree is holding the given ref")),
OPT_END(),
opts.overwrite_ignore = 1;
opts.prefix = prefix;
- opts.saved_argv = xmalloc(sizeof(const char *) * (argc + 2));
- memcpy(opts.saved_argv, argv, sizeof(const char *) * (argc + 1));
-
gitmodules_config();
git_config(git_checkout_config, &opts);
argc = parse_options(argc, argv, prefix, options, checkout_usage,
PARSE_OPT_KEEP_DASHDASH);
- /* recursive execution from checkout_new_worktree() */
opts.new_worktree_mode = getenv("GIT_CHECKOUT_NEW_WORKTREE") != NULL;
- if (opts.new_worktree_mode)
- opts.new_worktree = NULL;
-
- if (!opts.new_worktree)
- setup_work_tree();
if (conflict_style) {
opts.merge = 1; /* implied */
static char line_termination = '\n';
static int update_flags;
+ static unsigned create_reflog_flag;
static const char *msg;
/*
if (ref_transaction_update(transaction, refname,
new_sha1, have_old ? old_sha1 : NULL,
- update_flags, msg, &err))
+ update_flags | create_reflog_flag,
+ msg, &err))
die("%s", err.buf);
update_flags = 0;
die("create %s: extra input: %s", refname, next);
if (ref_transaction_create(transaction, refname, new_sha1,
- update_flags, msg, &err))
+ update_flags | create_reflog_flag,
+ msg, &err))
die("%s", err.buf);
update_flags = 0;
unsigned char sha1[20], oldsha1[20];
int delete = 0, no_deref = 0, read_stdin = 0, end_null = 0;
unsigned int flags = 0;
+ int create_reflog = 0;
struct option options[] = {
OPT_STRING( 'm', NULL, &msg, N_("reason"), N_("reason of the update")),
OPT_BOOL('d', NULL, &delete, N_("delete the reference")),
N_("update <refname> not the one it points to")),
OPT_BOOL('z', NULL, &end_null, N_("stdin has NUL-terminated arguments")),
OPT_BOOL( 0 , "stdin", &read_stdin, N_("read updates from stdin")),
+ OPT_BOOL( 0 , "create-reflog", &create_reflog, N_("create_reflog")),
OPT_END(),
};
if (msg && !*msg)
die("Refusing to perform update with empty message.");
+ create_reflog_flag = create_reflog ? REF_FORCE_CREATE_REFLOG : 0;
+
if (read_stdin) {
struct strbuf err = STRBUF_INIT;
struct ref_transaction *transaction;
die("%s: not a valid SHA1", value);
}
- hashclr(oldsha1); /* all-zero hash in case oldval is the empty string */
- if (oldval && *oldval && get_sha1(oldval, oldsha1))
- die("%s: not a valid old SHA1", oldval);
+ if (oldval) {
+ if (!*oldval)
+ /*
+ * The empty string implies that the reference
+ * must not already exist:
+ */
+ hashclr(oldsha1);
+ else if (get_sha1(oldval, oldsha1))
+ die("%s: not a valid old SHA1", oldval);
+ }
if (no_deref)
flags = REF_NODEREF;
if (delete)
- return delete_ref(refname, oldval ? oldsha1 : NULL, flags);
+ /*
+ * For purposes of backwards compatibility, we treat
+ * NULL_SHA1 as "don't care" here:
+ */
+ return delete_ref(refname,
+ (oldval && !is_null_sha1(oldsha1)) ? oldsha1 : NULL,
+ flags);
else
return update_ref(msg, refname, sha1, oldval ? oldsha1 : NULL,
- flags, UPDATE_REFS_DIE_ON_ERR);
+ flags | create_reflog_flag,
+ UPDATE_REFS_DIE_ON_ERR);
}
*/
#define REF_NEEDS_COMMIT 0x20
+ /*
+ * 0x40 is REF_FORCE_CREATE_REFLOG, so skip it if you're adding a
+ * value to ref_update::flags
+ */
+
/*
* Try to read one refname component from the front of refname.
* Return the length of the component found, or -1 if the component is
return get_packed_ref_dir(get_packed_ref_cache(refs));
}
-void add_packed_ref(const char *refname, const unsigned char *sha1)
+/*
+ * Add a reference to the in-memory packed reference cache. This may
+ * only be called while the packed-refs file is locked (see
+ * lock_packed_refs()). To actually write the packed-refs file, call
+ * commit_packed_refs().
+ */
+static void add_packed_ref(const char *refname, const unsigned char *sha1)
{
struct packed_ref_cache *packed_ref_cache =
get_packed_ref_cache(&ref_cache);
return ret;
}
-char *resolve_refdup(const char *ref, int resolve_flags, unsigned char *sha1, int *flags)
+char *resolve_refdup(const char *refname, int resolve_flags,
+ unsigned char *sha1, int *flags)
{
- return xstrdup_or_null(resolve_ref_unsafe(ref, resolve_flags, sha1, flags));
+ return xstrdup_or_null(resolve_ref_unsafe(refname, resolve_flags,
+ sha1, flags));
}
/* The argument to filter_refs */
int for_each_replace_ref(each_ref_fn fn, void *cb_data)
{
- return do_for_each_ref(&ref_cache, "refs/replace/", fn, 13, 0, cb_data);
+ return do_for_each_ref(&ref_cache, git_replace_ref_base, fn,
+ strlen(git_replace_ref_base), 0, cb_data);
}
int head_ref_namespaced(each_ref_fn fn, void *cb_data)
return 0;
}
-/* This should return a meaningful errno on failure */
-int lock_packed_refs(int flags)
+/*
+ * Lock the packed-refs file for writing. Flags is passed to
+ * hold_lock_file_for_update(). Return 0 on success. On errors, set
+ * errno appropriately and return a nonzero value.
+ */
+static int lock_packed_refs(int flags)
{
static int timeout_configured = 0;
static int timeout_value = 1000;
}
/*
- * Commit the packed refs changes.
- * On error we must make sure that errno contains a meaningful value.
+ * Write the current version of the packed refs cache from memory to
+ * disk. The packed-refs file must already be locked for writing (see
+ * lock_packed_refs()). Return zero on success. On errors, set errno
+ * and return a nonzero value
*/
-int commit_packed_refs(void)
+static int commit_packed_refs(void)
{
struct packed_ref_cache *packed_ref_cache =
get_packed_ref_cache(&ref_cache);
return error;
}
-void rollback_packed_refs(void)
+/*
+ * Rollback the lockfile for the packed-refs file, and discard the
+ * in-memory packed reference cache. (The packed-refs file will be
+ * read anew if it is needed again after this function is called.)
+ */
+static void rollback_packed_refs(void)
{
struct packed_ref_cache *packed_ref_cache =
get_packed_ref_cache(&ref_cache);
return 0;
}
-int repack_without_refs(struct string_list *refnames, struct strbuf *err)
+/*
+ * Rewrite the packed-refs file, omitting any refs listed in
+ * 'refnames'. On error, leave packed-refs unchanged, write an error
+ * message to 'err', and return a nonzero value.
+ *
+ * The refs in 'refnames' needn't be sorted. `err` must not be NULL.
+ */
+static int repack_without_refs(struct string_list *refnames, struct strbuf *err)
{
struct ref_dir *packed;
struct string_list_item *refname;
return 0;
}
-int delete_ref(const char *refname, const unsigned char *sha1, unsigned int flags)
+int delete_ref(const char *refname, const unsigned char *old_sha1,
+ unsigned int flags)
{
struct ref_transaction *transaction;
struct strbuf err = STRBUF_INIT;
transaction = ref_transaction_begin(&err);
if (!transaction ||
- ref_transaction_delete(transaction, refname,
- (sha1 && !is_null_sha1(sha1)) ? sha1 : NULL,
+ ref_transaction_delete(transaction, refname, old_sha1,
flags, NULL, &err) ||
ref_transaction_commit(transaction, &err)) {
error("%s", err.buf);
return 0;
}
+int delete_refs(struct string_list *refnames)
+{
+ struct strbuf err = STRBUF_INIT;
+ int i, result = 0;
+
+ if (!refnames->nr)
+ return 0;
+
+ result = repack_without_refs(refnames, &err);
+ if (result) {
+ /*
+ * If we failed to rewrite the packed-refs file, then
+ * it is unsafe to try to remove loose refs, because
+ * doing so might expose an obsolete packed value for
+ * a reference that might even point at an object that
+ * has been garbage collected.
+ */
+ if (refnames->nr == 1)
+ error(_("could not delete reference %s: %s"),
+ refnames->items[0].string, err.buf);
+ else
+ error(_("could not delete references: %s"), err.buf);
+
+ goto out;
+ }
+
+ for (i = 0; i < refnames->nr; i++) {
+ const char *refname = refnames->items[i].string;
+
+ if (delete_ref(refname, NULL, 0))
+ result |= error(_("could not remove reference %s"), refname);
+ }
+
+out:
+ strbuf_release(&err);
+ return result;
+}
+
/*
* People using contrib's git-new-workdir have .git/logs/refs ->
* /some/other/path/.git/logs/refs, and that may live on another device.
return ret;
}
- static int write_ref_to_lockfile(struct ref_lock *lock, const unsigned char *sha1);
+ static int write_ref_to_lockfile(struct ref_lock *lock,
+ const unsigned char *sha1, struct strbuf *err);
static int commit_ref_update(struct ref_lock *lock,
- const unsigned char *sha1, const char *logmsg);
+ const unsigned char *sha1, const char *logmsg,
+ int flags, struct strbuf *err);
int rename_ref(const char *oldrefname, const char *newrefname, const char *logmsg)
{
}
hashcpy(lock->old_oid.hash, orig_sha1);
- if (write_ref_to_lockfile(lock, orig_sha1) ||
- commit_ref_update(lock, orig_sha1, logmsg)) {
- error("unable to write current sha1 into %s", newrefname);
+ if (write_ref_to_lockfile(lock, orig_sha1, &err) ||
+ commit_ref_update(lock, orig_sha1, logmsg, 0, &err)) {
+ error("unable to write current sha1 into %s: %s", newrefname, err.buf);
+ strbuf_release(&err);
goto rollback;
}
flag = log_all_ref_updates;
log_all_ref_updates = 0;
- if (write_ref_to_lockfile(lock, orig_sha1) ||
- commit_ref_update(lock, orig_sha1, NULL))
- error("unable to write current sha1 into %s", oldrefname);
+ if (write_ref_to_lockfile(lock, orig_sha1, &err) ||
+ commit_ref_update(lock, orig_sha1, NULL, 0, &err)) {
+ error("unable to write current sha1 into %s: %s", oldrefname, err.buf);
+ strbuf_release(&err);
+ }
log_all_ref_updates = flag;
rollbacklog:
return cp - buf;
}
- /* This function must set a meaningful errno on failure */
- int log_ref_setup(const char *refname, struct strbuf *sb_logfile)
+ static int should_autocreate_reflog(const char *refname)
+ {
+ if (!log_all_ref_updates)
+ return 0;
+ return starts_with(refname, "refs/heads/") ||
+ starts_with(refname, "refs/remotes/") ||
+ starts_with(refname, "refs/notes/") ||
+ !strcmp(refname, "HEAD");
+ }
+
+ /*
+ * Create a reflog for a ref. If force_create = 0, the reflog will
+ * only be created for certain refs (those for which
+ * should_autocreate_reflog returns non-zero. Otherwise, create it
+ * regardless of the ref name. Fill in *err and return -1 on failure.
+ */
+ static int log_ref_setup(const char *refname, struct strbuf *sb_logfile, struct strbuf *err, int force_create)
{
int logfd, oflags = O_APPEND | O_WRONLY;
char *logfile;
logfile = sb_logfile->buf;
/* make sure the rest of the function can't change "logfile" */
sb_logfile = NULL;
- if (log_all_ref_updates &&
- (starts_with(refname, "refs/heads/") ||
- starts_with(refname, "refs/remotes/") ||
- starts_with(refname, "refs/notes/") ||
- !strcmp(refname, "HEAD"))) {
+ if (force_create || should_autocreate_reflog(refname)) {
if (safe_create_leading_directories(logfile) < 0) {
- int save_errno = errno;
- error("unable to create directory for %s", logfile);
- errno = save_errno;
+ strbuf_addf(err, "unable to create directory for %s: "
+ "%s", logfile, strerror(errno));
return -1;
}
oflags |= O_CREAT;
if (errno == EISDIR) {
if (remove_empty_directories(logfile)) {
- int save_errno = errno;
- error("There are still logs under '%s'",
- logfile);
- errno = save_errno;
+ strbuf_addf(err, "There are still logs under "
+ "'%s'", logfile);
return -1;
}
logfd = open(logfile, oflags, 0666);
}
if (logfd < 0) {
- int save_errno = errno;
- error("Unable to append to %s: %s", logfile,
- strerror(errno));
- errno = save_errno;
+ strbuf_addf(err, "unable to append to %s: %s",
+ logfile, strerror(errno));
return -1;
}
}
return 0;
}
+
+ int safe_create_reflog(const char *refname, int force_create, struct strbuf *err)
+ {
+ int ret;
+ struct strbuf sb = STRBUF_INIT;
+
+ ret = log_ref_setup(refname, &sb, err, force_create);
+ strbuf_release(&sb);
+ return ret;
+ }
+
static int log_ref_write_fd(int fd, const unsigned char *old_sha1,
const unsigned char *new_sha1,
const char *committer, const char *msg)
static int log_ref_write_1(const char *refname, const unsigned char *old_sha1,
const unsigned char *new_sha1, const char *msg,
- struct strbuf *sb_log_file)
+ struct strbuf *sb_log_file, int flags,
+ struct strbuf *err)
{
int logfd, result, oflags = O_APPEND | O_WRONLY;
char *log_file;
if (log_all_ref_updates < 0)
log_all_ref_updates = !is_bare_repository();
- result = log_ref_setup(refname, sb_log_file);
+ result = log_ref_setup(refname, sb_log_file, err, flags & REF_FORCE_CREATE_REFLOG);
+
if (result)
return result;
log_file = sb_log_file->buf;
result = log_ref_write_fd(logfd, old_sha1, new_sha1,
git_committer_info(0), msg);
if (result) {
- int save_errno = errno;
+ strbuf_addf(err, "unable to append to %s: %s", log_file,
+ strerror(errno));
close(logfd);
- error("Unable to append to %s", log_file);
- errno = save_errno;
return -1;
}
if (close(logfd)) {
- int save_errno = errno;
- error("Unable to append to %s", log_file);
- errno = save_errno;
+ strbuf_addf(err, "unable to append to %s: %s", log_file,
+ strerror(errno));
return -1;
}
return 0;
}
static int log_ref_write(const char *refname, const unsigned char *old_sha1,
- const unsigned char *new_sha1, const char *msg)
+ const unsigned char *new_sha1, const char *msg,
+ int flags, struct strbuf *err)
{
struct strbuf sb = STRBUF_INIT;
- int ret = log_ref_write_1(refname, old_sha1, new_sha1, msg, &sb);
+ int ret = log_ref_write_1(refname, old_sha1, new_sha1, msg, &sb, flags,
+ err);
strbuf_release(&sb);
return ret;
}
/*
* Write sha1 into the open lockfile, then close the lockfile. On
- * errors, rollback the lockfile and set errno to reflect the problem.
+ * errors, rollback the lockfile, fill in *err and
+ * return -1.
*/
static int write_ref_to_lockfile(struct ref_lock *lock,
- const unsigned char *sha1)
+ const unsigned char *sha1, struct strbuf *err)
{
static char term = '\n';
struct object *o;
o = parse_object(sha1);
if (!o) {
- error("Trying to write ref %s with nonexistent object %s",
- lock->ref_name, sha1_to_hex(sha1));
+ strbuf_addf(err,
+ "Trying to write ref %s with nonexistent object %s",
+ lock->ref_name, sha1_to_hex(sha1));
unlock_ref(lock);
- errno = EINVAL;
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);
+ strbuf_addf(err,
+ "Trying to write non-commit object %s to branch %s",
+ sha1_to_hex(sha1), lock->ref_name);
unlock_ref(lock);
- errno = EINVAL;
return -1;
}
if (write_in_full(lock->lk->fd, sha1_to_hex(sha1), 40) != 40 ||
write_in_full(lock->lk->fd, &term, 1) != 1 ||
close_ref(lock) < 0) {
- int save_errno = errno;
- error("Couldn't write %s", lock->lk->filename.buf);
+ strbuf_addf(err,
+ "Couldn't write %s", lock->lk->filename.buf);
unlock_ref(lock);
- errno = save_errno;
return -1;
}
return 0;
* necessary, using the specified lockmsg (which can be NULL).
*/
static int commit_ref_update(struct ref_lock *lock,
- const unsigned char *sha1, const char *logmsg)
+ const unsigned char *sha1, const char *logmsg,
+ int flags, struct strbuf *err)
{
clear_loose_ref_cache(&ref_cache);
- if (log_ref_write(lock->ref_name, lock->old_oid.hash, sha1, logmsg) < 0 ||
+ if (log_ref_write(lock->ref_name, lock->old_oid.hash, sha1, logmsg, flags, err) < 0 ||
(strcmp(lock->ref_name, lock->orig_ref_name) &&
- log_ref_write(lock->orig_ref_name, lock->old_oid.hash, sha1, logmsg) < 0)) {
+ log_ref_write(lock->orig_ref_name, lock->old_oid.hash, sha1, logmsg, flags, err) < 0)) {
+ char *old_msg = strbuf_detach(err, NULL);
+ strbuf_addf(err, "Cannot update the ref '%s': %s",
+ lock->ref_name, old_msg);
+ free(old_msg);
unlock_ref(lock);
return -1;
}
head_ref = resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
head_sha1, &head_flag);
if (head_ref && (head_flag & REF_ISSYMREF) &&
- !strcmp(head_ref, lock->ref_name))
- log_ref_write("HEAD", lock->old_oid.hash, sha1, logmsg);
+ !strcmp(head_ref, lock->ref_name)) {
+ struct strbuf log_err = STRBUF_INIT;
+ if (log_ref_write("HEAD", lock->old_oid.hash, sha1,
+ logmsg, 0, &log_err)) {
+ error("%s", log_err.buf);
+ strbuf_release(&log_err);
+ }
+ }
}
if (commit_ref(lock)) {
error("Couldn't set %s", lock->ref_name);
unlock_ref(lock);
return -1;
}
+
unlock_ref(lock);
return 0;
}
int fd, len, written;
char *git_HEAD = git_pathdup("%s", ref_target);
unsigned char old_sha1[20], new_sha1[20];
+ struct strbuf err = STRBUF_INIT;
if (logmsg && read_ref(ref_target, old_sha1))
hashclr(old_sha1);
#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);
+ if (logmsg && !read_ref(refs_heads_master, new_sha1) &&
+ log_ref_write(ref_target, old_sha1, new_sha1, logmsg, 0, &err)) {
+ error("%s", err.buf);
+ strbuf_release(&err);
+ }
free(git_HEAD);
return 0;
hashcpy(cb->sha1, nsha1);
if (hashcmp(cb->osha1, nsha1))
warning("Log for ref %s has gap after %s.",
- cb->refname, show_date(cb->date, cb->tz, DATE_RFC2822));
+ cb->refname, show_date(cb->date, cb->tz, DATE_MODE(RFC2822)));
}
else if (cb->date == cb->at_time)
hashcpy(cb->sha1, nsha1);
else if (hashcmp(nsha1, cb->sha1))
warning("Log for ref %s unexpectedly ended on %s.",
cb->refname, show_date(cb->date, cb->tz,
- DATE_RFC2822));
+ DATE_MODE(RFC2822)));
hashcpy(cb->osha1, osha1);
hashcpy(cb->nsha1, nsha1);
cb->found_it = 1;
* value, so we don't need to write it.
*/
} else if (write_ref_to_lockfile(update->lock,
- update->new_sha1)) {
+ update->new_sha1,
+ err)) {
+ char *write_err = strbuf_detach(err, NULL);
+
/*
* The lock was freed upon failure of
* write_ref_to_lockfile():
*/
update->lock = NULL;
- strbuf_addf(err, "cannot update the ref '%s'.",
- update->refname);
+ strbuf_addf(err,
+ "cannot update the ref '%s': %s",
+ update->refname, write_err);
+ free(write_err);
ret = TRANSACTION_GENERIC_ERROR;
goto cleanup;
} else {
if (update->flags & REF_NEEDS_COMMIT) {
if (commit_ref_update(update->lock,
- update->new_sha1, update->msg)) {
+ update->new_sha1, update->msg,
+ update->flags, err)) {
/* freed by commit_ref_update(): */
update->lock = NULL;
- strbuf_addf(err, "Cannot update the ref '%s'.",
- update->refname);
ret = TRANSACTION_GENERIC_ERROR;
goto cleanup;
} else {
return ret;
}
+static int ref_present(const char *refname,
+ const struct object_id *oid, int flags, void *cb_data)
+{
+ struct string_list *affected_refnames = cb_data;
+
+ return string_list_has_string(affected_refnames, refname);
+}
+
+int initial_ref_transaction_commit(struct ref_transaction *transaction,
+ struct strbuf *err)
+{
+ struct ref_dir *loose_refs = get_loose_refs(&ref_cache);
+ struct ref_dir *packed_refs = get_packed_refs(&ref_cache);
+ int ret = 0, i;
+ int n = transaction->nr;
+ struct ref_update **updates = transaction->updates;
+ struct string_list affected_refnames = STRING_LIST_INIT_NODUP;
+
+ assert(err);
+
+ if (transaction->state != REF_TRANSACTION_OPEN)
+ die("BUG: commit called for transaction that is not open");
+
+ /* Fail if a refname appears more than once in the transaction: */
+ for (i = 0; i < n; i++)
+ string_list_append(&affected_refnames, updates[i]->refname);
+ string_list_sort(&affected_refnames);
+ if (ref_update_reject_duplicates(&affected_refnames, err)) {
+ ret = TRANSACTION_GENERIC_ERROR;
+ goto cleanup;
+ }
+
+ /*
+ * It's really undefined to call this function in an active
+ * repository or when there are existing references: we are
+ * only locking and changing packed-refs, so (1) any
+ * simultaneous processes might try to change a reference at
+ * the same time we do, and (2) any existing loose versions of
+ * the references that we are setting would have precedence
+ * over our values. But some remote helpers create the remote
+ * "HEAD" and "master" branches before calling this function,
+ * so here we really only check that none of the references
+ * that we are creating already exists.
+ */
+ if (for_each_rawref(ref_present, &affected_refnames))
+ die("BUG: initial ref transaction called with existing refs");
+
+ for (i = 0; i < n; i++) {
+ struct ref_update *update = updates[i];
+
+ if ((update->flags & REF_HAVE_OLD) &&
+ !is_null_sha1(update->old_sha1))
+ die("BUG: initial ref transaction with old_sha1 set");
+ if (verify_refname_available(update->refname,
+ &affected_refnames, NULL,
+ loose_refs, err) ||
+ verify_refname_available(update->refname,
+ &affected_refnames, NULL,
+ packed_refs, err)) {
+ ret = TRANSACTION_NAME_CONFLICT;
+ goto cleanup;
+ }
+ }
+
+ if (lock_packed_refs(0)) {
+ strbuf_addf(err, "unable to lock packed-refs file: %s",
+ strerror(errno));
+ ret = TRANSACTION_GENERIC_ERROR;
+ goto cleanup;
+ }
+
+ for (i = 0; i < n; i++) {
+ struct ref_update *update = updates[i];
+
+ if ((update->flags & REF_HAVE_NEW) &&
+ !is_null_sha1(update->new_sha1))
+ add_packed_ref(update->refname, update->new_sha1);
+ }
+
+ if (commit_packed_refs()) {
+ strbuf_addf(err, "unable to commit packed-refs file: %s",
+ strerror(errno));
+ ret = TRANSACTION_GENERIC_ERROR;
+ goto cleanup;
+ }
+
+cleanup:
+ transaction->state = REF_TRANSACTION_CLOSED;
+ string_list_clear(&affected_refnames, 0);
+ return ret;
+}
+
char *shorten_unambiguous_ref(const char *refname, int strict)
{
int i;
#ifndef REFS_H
#define REFS_H
+/*
+ * Resolve a reference, recursively following symbolic refererences.
+ *
+ * Store the referred-to object's name in sha1 and return the name of
+ * the non-symbolic reference that ultimately pointed at it. The
+ * return value, if not NULL, is a pointer into either a static buffer
+ * or the input ref.
+ *
+ * If the reference cannot be resolved to an object, the behavior
+ * depends on the RESOLVE_REF_READING flag:
+ *
+ * - If RESOLVE_REF_READING is set, return NULL.
+ *
+ * - If RESOLVE_REF_READING is not set, clear sha1 and return the name of
+ * the last reference name in the chain, which will either be a non-symbolic
+ * reference or an undefined reference. If this is a prelude to
+ * "writing" to the ref, the return value is the name of the ref
+ * that will actually be created or changed.
+ *
+ * If the RESOLVE_REF_NO_RECURSE flag is passed, only resolves one
+ * level of symbolic reference. The value stored in sha1 for a symbolic
+ * reference will always be null_sha1 in this case, and the return
+ * value is the reference that the symref refers to directly.
+ *
+ * If flags is non-NULL, set the value that it points to the
+ * combination of REF_ISPACKED (if the reference was found among the
+ * packed references), REF_ISSYMREF (if the initial reference was a
+ * symbolic reference), REF_BAD_NAME (if the reference name is ill
+ * formed --- see RESOLVE_REF_ALLOW_BAD_NAME below), and REF_ISBROKEN
+ * (if the ref is malformed or has a bad name). See refs.h for more detail
+ * on each flag.
+ *
+ * If ref is not a properly-formatted, normalized reference, return
+ * NULL. If more than MAXDEPTH recursive symbolic lookups are needed,
+ * give up and return NULL.
+ *
+ * RESOLVE_REF_ALLOW_BAD_NAME allows resolving refs even when their
+ * name is invalid according to git-check-ref-format(1). If the name
+ * is bad then the value stored in sha1 will be null_sha1 and the two
+ * flags REF_ISBROKEN and REF_BAD_NAME will be set.
+ *
+ * Even with RESOLVE_REF_ALLOW_BAD_NAME, names that escape the refs/
+ * directory and do not consist of all caps and underscores cannot be
+ * resolved. The function returns NULL for such ref names.
+ * Caps and underscores refers to the special refs, such as HEAD,
+ * FETCH_HEAD and friends, that all live outside of the refs/ directory.
+ */
+#define RESOLVE_REF_READING 0x01
+#define RESOLVE_REF_NO_RECURSE 0x02
+#define RESOLVE_REF_ALLOW_BAD_NAME 0x04
+
+extern const char *resolve_ref_unsafe(const char *refname, int resolve_flags,
+ unsigned char *sha1, int *flags);
+
+extern char *resolve_refdup(const char *refname, int resolve_flags,
+ unsigned char *sha1, int *flags);
+
+extern int read_ref_full(const char *refname, int resolve_flags,
+ unsigned char *sha1, int *flags);
+extern int read_ref(const char *refname, unsigned char *sha1);
+
+extern int ref_exists(const char *refname);
+
+extern int is_branch(const char *refname);
+
+/*
+ * If refname is a non-symbolic reference that refers to a tag object,
+ * and the tag can be (recursively) dereferenced to a non-tag object,
+ * store the SHA1 of the referred-to object to sha1 and return 0. If
+ * any of these conditions are not met, return a non-zero value.
+ * Symbolic references are considered unpeelable, even if they
+ * ultimately resolve to a peelable tag.
+ */
+extern int peel_ref(const char *refname, unsigned char *sha1);
+
+/**
+ * Resolve refname in the nested "gitlink" repository that is located
+ * at path. If the resolution is successful, return 0 and set sha1 to
+ * the name of the object; otherwise, return a non-zero value.
+ */
+extern int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *sha1);
+
+/*
+ * Return true iff abbrev_name is a possible abbreviation for
+ * full_name according to the rules defined by ref_rev_parse_rules in
+ * refs.c.
+ */
+extern int refname_match(const char *abbrev_name, const char *full_name);
+
+extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
+extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
+
/*
* A ref_transaction represents a collection of ref updates
* that should succeed or fail together.
* modifies the reference also returns a nonzero value to immediately
* stop the iteration.
*/
-extern int head_ref(each_ref_fn, void *);
-extern int for_each_ref(each_ref_fn, void *);
-extern int for_each_ref_in(const char *, each_ref_fn, void *);
-extern int for_each_tag_ref(each_ref_fn, void *);
-extern int for_each_branch_ref(each_ref_fn, void *);
-extern int for_each_remote_ref(each_ref_fn, void *);
-extern int for_each_replace_ref(each_ref_fn, void *);
-extern int for_each_glob_ref(each_ref_fn, const char *pattern, void *);
-extern int for_each_glob_ref_in(each_ref_fn, const char *pattern, const char* prefix, void *);
+extern int head_ref(each_ref_fn fn, void *cb_data);
+extern int for_each_ref(each_ref_fn fn, void *cb_data);
+extern int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data);
+extern int for_each_tag_ref(each_ref_fn fn, void *cb_data);
+extern int for_each_branch_ref(each_ref_fn fn, void *cb_data);
+extern int for_each_remote_ref(each_ref_fn fn, void *cb_data);
+extern int for_each_replace_ref(each_ref_fn fn, void *cb_data);
+extern int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data);
+extern int for_each_glob_ref_in(each_ref_fn fn, const char *pattern, const char *prefix, void *cb_data);
extern int head_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data);
extern int for_each_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data);
extern int head_ref_namespaced(each_ref_fn fn, void *cb_data);
extern int for_each_namespaced_ref(each_ref_fn fn, void *cb_data);
+/* can be used to learn about broken ref and symref */
+extern int for_each_rawref(each_ref_fn fn, void *cb_data);
+
static inline const char *has_glob_specials(const char *pattern)
{
return strpbrk(pattern, "?*[");
}
-/* can be used to learn about broken ref and symref */
-extern int for_each_rawref(each_ref_fn, void *);
-
extern void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname);
extern void warn_dangling_symrefs(FILE *fp, const char *msg_fmt, const struct string_list *refnames);
-/*
- * Lock the packed-refs file for writing. Flags is passed to
- * hold_lock_file_for_update(). Return 0 on success.
- * Errno is set to something meaningful on error.
- */
-extern int lock_packed_refs(int flags);
-
-/*
- * Add a reference to the in-memory packed reference cache. This may
- * only be called while the packed-refs file is locked (see
- * lock_packed_refs()). To actually write the packed-refs file, call
- * commit_packed_refs().
- */
-extern void add_packed_ref(const char *refname, const unsigned char *sha1);
-
-/*
- * Write the current version of the packed refs cache from memory to
- * disk. The packed-refs file must already be locked for writing (see
- * lock_packed_refs()). Return zero on success.
- * Sets errno to something meaningful on error.
- */
-extern int commit_packed_refs(void);
-
-/*
- * Rollback the lockfile for the packed-refs file, and discard the
- * in-memory packed reference cache. (The packed-refs file will be
- * read anew if it is needed again after this function is called.)
- */
-extern void rollback_packed_refs(void);
-
/*
* Flags for controlling behaviour of pack_refs()
* PACK_REFS_PRUNE: Prune loose refs after packing
*/
int pack_refs(unsigned int flags);
-/*
- * Rewrite the packed-refs file, omitting any refs listed in
- * 'refnames'. On error, packed-refs will be unchanged, the return
- * value is nonzero, and a message about the error is written to the
- * 'err' strbuf.
- *
- * The refs in 'refnames' needn't be sorted. `err` must not be NULL.
- */
-extern int repack_without_refs(struct string_list *refnames,
- struct strbuf *err);
-
-extern int ref_exists(const char *);
-
-extern int is_branch(const char *refname);
-
-/*
- * If refname is a non-symbolic reference that refers to a tag object,
- * and the tag can be (recursively) dereferenced to a non-tag object,
- * store the SHA1 of the referred-to object to sha1 and return 0. If
- * any of these conditions are not met, return a non-zero value.
- * Symbolic references are considered unpeelable, even if they
- * ultimately resolve to a peelable tag.
- */
-extern int peel_ref(const char *refname, unsigned char *sha1);
-
/*
* Flags controlling ref_transaction_update(), ref_transaction_create(), etc.
* REF_NODEREF: act on the ref directly, instead of dereferencing
* Other flags are reserved for internal use.
*/
#define REF_NODEREF 0x01
+ #define REF_FORCE_CREATE_REFLOG 0x40
/*
- * Setup reflog before using. Set errno to something meaningful on failure.
+ * Setup reflog before using. Fill in err and return -1 on failure.
*/
- int log_ref_setup(const char *refname, struct strbuf *logfile);
+ int safe_create_reflog(const char *refname, int force_create, struct strbuf *err);
/** Reads log for the value of ref during at_time. **/
extern int read_ref_at(const char *refname, unsigned int flags,
/** Check if a particular reflog exists */
extern int reflog_exists(const char *refname);
+/*
+ * Delete the specified reference. If old_sha1 is non-NULL, then
+ * verify that the current value of the reference is old_sha1 before
+ * deleting it. If old_sha1 is NULL, delete the reference if it
+ * exists, regardless of its old value. It is an error for old_sha1 to
+ * be NULL_SHA1. flags is passed through to ref_transaction_delete().
+ */
+extern int delete_ref(const char *refname, const unsigned char *old_sha1,
+ unsigned int flags);
+
+/*
+ * Delete the specified references. If there are any problems, emit
+ * errors but attempt to keep going (i.e., the deletes are not done in
+ * an all-or-nothing transaction).
+ */
+extern int delete_refs(struct string_list *refnames);
+
/** Delete a reflog */
extern int delete_reflog(const char *refname);
extern int check_refname_format(const char *refname, int flags);
extern const char *prettify_refname(const char *refname);
+
extern char *shorten_unambiguous_ref(const char *refname, int strict);
/** rename ref, return 0 on success **/
extern int rename_ref(const char *oldref, const char *newref, const char *logmsg);
-/**
- * Resolve refname in the nested "gitlink" repository that is located
- * at path. If the resolution is successful, return 0 and set sha1 to
- * the name of the object; otherwise, return a non-zero value.
- */
-extern int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *sha1);
+extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
enum action_on_err {
UPDATE_REFS_MSG_ON_ERR,
int ref_transaction_commit(struct ref_transaction *transaction,
struct strbuf *err);
+/*
+ * Like ref_transaction_commit(), but optimized for creating
+ * references when originally initializing a repository (e.g., by "git
+ * clone"). It writes the new references directly to packed-refs
+ * without locking the individual references.
+ *
+ * It is a bug to call this function when there might be other
+ * processes accessing the repository or if there are existing
+ * references that might conflict with the ones being created. All
+ * old_sha1 values must either be absent or NULL_SHA1.
+ */
+int initial_ref_transaction_commit(struct ref_transaction *transaction,
+ struct strbuf *err);
+
/*
* Free an existing transaction and all associated data.
*/
unsigned int flags, enum action_on_err onerr);
extern int parse_hide_refs_config(const char *var, const char *value, const char *);
+
extern int ref_is_hidden(const char *);
enum expire_reflog_flags {