#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>"),
const char *name; /* The short name used */
const char *path; /* The full name of a real branch */
struct commit *commit; /* The named commit */
+ /*
+ * if not null the branch is detached because it's already
+ * checked out in this checkout
+ */
+ char *checkout;
};
static void setup_branch_path(struct branch_info *branch)
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)
{
const char *path = opts->new_worktree, *name;
struct stat st;
struct child_process cp;
- int counter = 0, len;
+ int counter = 0, len, ret;
if (!new->commit)
die(_("no branch specified"));
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);
/*
* 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);
memset(&cp, 0, sizeof(cp));
cp.git_cmd = 1;
cp.argv = opts->saved_argv;
- return run_command(&cp);
+ 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)
return NULL;
}
+static void check_linked_checkout(struct branch_info *new, const char *id)
+{
+ struct strbuf sb = STRBUF_INIT;
+ struct strbuf path = STRBUF_INIT;
+ struct strbuf gitdir = STRBUF_INIT;
+ const char *start, *end;
+
+ if (id)
+ strbuf_addf(&path, "%s/worktrees/%s/HEAD", get_git_common_dir(), id);
+ else
+ strbuf_addf(&path, "%s/HEAD", get_git_common_dir());
+
+ if (strbuf_read_file(&sb, path.buf, 0) < 0 ||
+ !skip_prefix(sb.buf, "ref:", &start))
+ goto done;
+ while (isspace(*start))
+ start++;
+ end = start;
+ while (*end && !isspace(*end))
+ end++;
+ if (strncmp(start, new->path, end - start) || new->path[end - start] != '\0')
+ goto done;
+ if (id) {
+ strbuf_reset(&path);
+ strbuf_addf(&path, "%s/worktrees/%s/gitdir", get_git_common_dir(), id);
+ if (strbuf_read_file(&gitdir, path.buf, 0) <= 0)
+ goto done;
+ strbuf_rtrim(&gitdir);
+ } else
+ strbuf_addstr(&gitdir, get_git_common_dir());
+ die(_("'%s' is already checked out at '%s'"), new->name, gitdir.buf);
+done:
+ strbuf_release(&path);
+ strbuf_release(&sb);
+ strbuf_release(&gitdir);
+}
+
+static void check_linked_checkouts(struct branch_info *new)
+{
+ struct strbuf path = STRBUF_INIT;
+ DIR *dir;
+ struct dirent *d;
+
+ strbuf_addf(&path, "%s/worktrees", get_git_common_dir());
+ if ((dir = opendir(path.buf)) == NULL) {
+ strbuf_release(&path);
+ return;
+ }
+
+ /*
+ * $GIT_COMMON_DIR/HEAD is practically outside
+ * $GIT_DIR so resolve_ref_unsafe() won't work (it
+ * uses git_path). Parse the ref ourselves.
+ */
+ check_linked_checkout(new, NULL);
+
+ while ((d = readdir(dir)) != NULL) {
+ if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
+ continue;
+ check_linked_checkout(new, d->d_name);
+ }
+ strbuf_release(&path);
+ closedir(dir);
+}
+
static int parse_branchname_arg(int argc, const char **argv,
int dwim_new_local_branch_ok,
struct branch_info *new,
struct tree **source_tree,
unsigned char rev[20],
- const char **new_branch)
+ const char **new_branch,
+ int force_detach)
{
int argcount = 0;
unsigned char branch_rev[20];
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)))
+ check_linked_checkouts(new);
+ free(head_ref);
+ }
+
new->commit = lookup_commit_reference_gently(rev, 1);
if (!new->commit) {
/* not a commit */
if (opts.new_worktree_mode)
opts.new_worktree = NULL;
+ if (!opts.new_worktree)
+ setup_work_tree();
+
if (conflict_style) {
opts.merge = 1; /* implied */
git_xmerge_config("merge.conflictstyle", conflict_style, NULL);
!opts.new_branch;
int n = parse_branchname_arg(argc, argv, dwim_ok,
&new, &opts.source_tree,
- rev, &opts.new_branch);
+ rev, &opts.new_branch,
+ opts.force_detach);
argv += n;
argc -= n;
}