$GIT_DIR or $GIT_COMMON_DIR when you need to directly access something
inside $GIT_DIR. Use `git rev-parse --git-path` to get the final path.
+When you are done with a linked working tree you can simply delete it.
+You can clean up any stale $GIT_DIR/worktrees entries via `git prune
+--worktrees` in the main or any linked working tree.
+
+If you move a linked working directory to another file system, or
+within a file system that does not support hard links, you need to run
+at least one git command inside the linked working directory
+(e.g. `git status`) in order to update its entry in $GIT_DIR/worktrees
+so that it does not get automatically removed.
+
+To prevent `git prune --worktrees` from deleting a $GIT_DIR/worktrees
+entry (which can be useful in some situations, such as when the
+entry's working tree is stored on a portable device), add a file named
+'locked' to the entry's directory. The file contains the reason in
+plain text. For example, if a linked working tree's `.git` file points
+to `/path/main/.git/worktrees/test-next` then a file named
+`/path/main/.git/worktrees/test-next/locked` will prevent the
+`test-next` entry from being pruned. See
+linkgit:gitrepository-layout[5] for details.
+
EXAMPLES
--------
--expire <time>::
Only expire loose objects older than <time>.
+--worktrees::
+ Prune dead working tree information in $GIT_DIR/worktrees.
+
<head>...::
In addition to objects
reachable from any of our references, keep objects
$GIT_COMMON_DIR is set and "$GIT_COMMON_DIR/worktrees" will be
used instead.
+worktrees/<id>/gitdir::
+ A text file containing the absolute path back to the .git file
+ that points to here. This is used to check if the linked
+ repository has been manually removed and there is no need to
+ keep this directory any more. mtime of this file should be
+ updated every time the linked repository is accessed.
+
+worktrees/<id>/locked::
+ If this file exists, the linked repository may be on a
+ portable device and not available. It does not mean that the
+ linked repository is gone and `worktrees/<id>` could be
+ removed. The file's content contains a reason string on why
+ the repository is locked.
+
+worktrees/<id>/link::
+ If this file exists, it is a hard link to the linked .git
+ file. It is used to detect if the linked repository is
+ manually removed.
+
SEE ALSO
--------
linkgit:git-init[1],
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"));
if (mkdir(sb_repo.buf, 0777))
die_errno(_("could not create directory of '%s'"), sb_repo.buf);
+ /*
+ * 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);
+ 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);
+ strbuf_reset(&sb);
+ strbuf_addf(&sb, "%s/locked", sb_repo.buf);
+ unlink_or_warn(sb.buf);
+ return ret;
}
static int git_checkout_config(const char *var, const char *value, void *cb)
return 0;
}
+static int prune_worktree(const char *id, struct strbuf *reason)
+{
+ struct stat st;
+ char *path;
+ int fd, len;
+
+ if (!is_directory(git_path("worktrees/%s", id))) {
+ strbuf_addf(reason, _("Removing worktrees/%s: not a valid directory"), id);
+ return 1;
+ }
+ if (file_exists(git_path("worktrees/%s/locked", id)))
+ return 0;
+ if (stat(git_path("worktrees/%s/gitdir", id), &st)) {
+ strbuf_addf(reason, _("Removing worktrees/%s: gitdir file does not exist"), id);
+ return 1;
+ }
+ fd = open(git_path("worktrees/%s/gitdir", id), O_RDONLY);
+ if (fd < 0) {
+ strbuf_addf(reason, _("Removing worktrees/%s: unable to read gitdir file (%s)"),
+ id, strerror(errno));
+ return 1;
+ }
+ len = st.st_size;
+ path = xmalloc(len + 1);
+ read_in_full(fd, path, len);
+ close(fd);
+ while (len && (path[len - 1] == '\n' || path[len - 1] == '\r'))
+ len--;
+ if (!len) {
+ strbuf_addf(reason, _("Removing worktrees/%s: invalid gitdir file"), id);
+ free(path);
+ return 1;
+ }
+ path[len] = '\0';
+ if (!file_exists(path)) {
+ struct stat st_link;
+ free(path);
+ /*
+ * the repo is moved manually and has not been
+ * accessed since?
+ */
+ if (!stat(git_path("worktrees/%s/link", id), &st_link) &&
+ st_link.st_nlink > 1)
+ return 0;
+ strbuf_addf(reason, _("Removing worktrees/%s: gitdir file points to non-existent location"), id);
+ return 1;
+ }
+ free(path);
+ return st.st_mtime <= expire;
+}
+
+static void prune_worktrees(void)
+{
+ struct strbuf reason = STRBUF_INIT;
+ struct strbuf path = STRBUF_INIT;
+ DIR *dir = opendir(git_path("worktrees"));
+ struct dirent *d;
+ int ret;
+ if (!dir)
+ return;
+ while ((d = readdir(dir)) != NULL) {
+ if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
+ continue;
+ strbuf_reset(&reason);
+ if (!prune_worktree(d->d_name, &reason))
+ continue;
+ if (show_only || verbose)
+ printf("%s\n", reason.buf);
+ if (show_only)
+ continue;
+ strbuf_reset(&path);
+ strbuf_addstr(&path, git_path("worktrees/%s", d->d_name));
+ ret = remove_dir_recursively(&path, 0);
+ if (ret < 0 && errno == ENOTDIR)
+ ret = unlink(path.buf);
+ if (ret)
+ error(_("failed to remove: %s"), strerror(errno));
+ }
+ closedir(dir);
+ if (!show_only)
+ rmdir(git_path("worktrees"));
+ strbuf_release(&reason);
+ strbuf_release(&path);
+}
+
/*
* Write errors (particularly out of space) can result in
* failed temporary packs (and more rarely indexes and other
{
struct rev_info revs;
struct progress *progress = NULL;
+ int do_prune_worktrees = 0;
const struct option options[] = {
OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
OPT__VERBOSE(&verbose, N_("report pruned objects")),
OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
+ OPT_BOOL(0, "worktrees", &do_prune_worktrees, N_("prune .git/worktrees")),
OPT_EXPIRY_DATE(0, "expire", &expire,
N_("expire objects older than <time>")),
OPT_END()
init_revisions(&revs, prefix);
argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
+
+ if (do_prune_worktrees) {
+ if (argc)
+ die(_("--worktrees does not take extra arguments"));
+ prune_worktrees();
+ return 0;
+ }
+
while (argc--) {
unsigned char sha1[20];
const char *name = *argv++;
return ret;
}
+static void update_linked_gitdir(const char *gitfile, const char *gitdir)
+{
+ struct strbuf path = STRBUF_INIT;
+ struct stat st;
+
+ strbuf_addf(&path, "%s/gitfile", gitdir);
+ if (stat(path.buf, &st) || st.st_mtime + 24 * 3600 < time(NULL))
+ write_file(path.buf, 0, "%s\n", gitfile);
+ strbuf_release(&path);
+}
+
/*
* Try to read the location of the git directory from the .git file,
* return path to git directory if found.
if (!is_git_directory(dir))
die("Not a git repository: %s", dir);
+
+ update_linked_gitdir(path, dir);
path = real_path(dir);
free(buf);
--- /dev/null
+#!/bin/sh
+
+test_description='prune $GIT_DIR/worktrees'
+
+. ./test-lib.sh
+
+test_expect_success 'prune --worktrees on normal repo' '
+ git prune --worktrees &&
+ test_must_fail git prune --worktrees abc
+'
+
+test_expect_success 'prune files inside $GIT_DIR/worktrees' '
+ mkdir .git/worktrees &&
+ : >.git/worktrees/abc &&
+ git prune --worktrees --verbose >actual &&
+ cat >expect <<EOF &&
+Removing worktrees/abc: not a valid directory
+EOF
+ test_i18ncmp expect actual &&
+ ! test -f .git/worktrees/abc &&
+ ! test -d .git/worktrees
+'
+
+test_expect_success 'prune directories without gitdir' '
+ mkdir -p .git/worktrees/def/abc &&
+ : >.git/worktrees/def/def &&
+ cat >expect <<EOF &&
+Removing worktrees/def: gitdir file does not exist
+EOF
+ git prune --worktrees --verbose >actual &&
+ test_i18ncmp expect actual &&
+ ! test -d .git/worktrees/def &&
+ ! test -d .git/worktrees
+'
+
+test_expect_success POSIXPERM 'prune directories with unreadable gitdir' '
+ mkdir -p .git/worktrees/def/abc &&
+ : >.git/worktrees/def/def &&
+ : >.git/worktrees/def/gitdir &&
+ chmod u-r .git/worktrees/def/gitdir &&
+ git prune --worktrees --verbose >actual &&
+ test_i18ngrep "Removing worktrees/def: unable to read gitdir file" actual &&
+ ! test -d .git/worktrees/def &&
+ ! test -d .git/worktrees
+'
+
+test_expect_success 'prune directories with invalid gitdir' '
+ mkdir -p .git/worktrees/def/abc &&
+ : >.git/worktrees/def/def &&
+ : >.git/worktrees/def/gitdir &&
+ git prune --worktrees --verbose >actual &&
+ test_i18ngrep "Removing worktrees/def: invalid gitdir file" actual &&
+ ! test -d .git/worktrees/def &&
+ ! test -d .git/worktrees
+'
+
+test_expect_success 'prune directories with gitdir pointing to nowhere' '
+ mkdir -p .git/worktrees/def/abc &&
+ : >.git/worktrees/def/def &&
+ echo "$(pwd)"/nowhere >.git/worktrees/def/gitdir &&
+ git prune --worktrees --verbose >actual &&
+ test_i18ngrep "Removing worktrees/def: gitdir file points to non-existent location" actual &&
+ ! test -d .git/worktrees/def &&
+ ! test -d .git/worktrees
+'
+
+test_expect_success 'not prune locked checkout' '
+ test_when_finished rm -r .git/worktrees
+ mkdir -p .git/worktrees/ghi &&
+ : >.git/worktrees/ghi/locked &&
+ git prune --worktrees &&
+ test -d .git/worktrees/ghi
+'
+
+test_expect_success 'not prune recent checkouts' '
+ test_when_finished rm -r .git/worktrees
+ mkdir zz &&
+ mkdir -p .git/worktrees/jlm &&
+ echo "$(pwd)"/zz >.git/worktrees/jlm/gitdir &&
+ git prune --worktrees --verbose --expire=2.days.ago &&
+ test -d .git/worktrees/jlm
+'
+
+test_done