23af91d102
(alias R=$GIT_COMMON_DIR/worktrees/<id>) - linked checkouts are supposed to keep its location in $R/gitdir up to date. The use case is auto fixup after a manual checkout move. - linked checkouts are supposed to update mtime of $R/gitdir. If $R/gitdir's mtime is older than a limit, and it points to nowhere, worktrees/<id> is to be pruned. - If $R/locked exists, worktrees/<id> is not supposed to be pruned. If $R/locked exists and $R/gitdir's mtime is older than a really long limit, warn about old unused repo. - "git checkout --to" is supposed to make a hard link named $R/link pointing to the .git file on supported file systems to help detect the user manually deleting the checkout. If $R/link exists and its link count is greated than 1, the repo is kept. Helped-by: Marc Branchaud <marcnarc@xiplink.com> Helped-by: Eric Sunshine <sunshine@sunshineco.com> Helped-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Marc Branchaud <marcnarc@xiplink.com> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
249 lines
6.1 KiB
C
249 lines
6.1 KiB
C
#include "cache.h"
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#include "commit.h"
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#include "diff.h"
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#include "revision.h"
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#include "builtin.h"
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#include "reachable.h"
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#include "parse-options.h"
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#include "progress.h"
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#include "dir.h"
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static const char * const prune_usage[] = {
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N_("git prune [-n] [-v] [--expire <time>] [--] [<head>...]"),
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NULL
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};
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static int show_only;
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static int verbose;
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static unsigned long expire;
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static int show_progress = -1;
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static int prune_tmp_file(const char *fullpath)
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{
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struct stat st;
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if (lstat(fullpath, &st))
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return error("Could not stat '%s'", fullpath);
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if (st.st_mtime > expire)
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return 0;
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if (show_only || verbose)
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printf("Removing stale temporary file %s\n", fullpath);
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if (!show_only)
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unlink_or_warn(fullpath);
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return 0;
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}
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static int prune_object(const unsigned char *sha1, const char *fullpath,
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void *data)
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{
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struct stat st;
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/*
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* Do we know about this object?
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* It must have been reachable
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*/
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if (lookup_object(sha1))
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return 0;
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if (lstat(fullpath, &st)) {
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/* report errors, but do not stop pruning */
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error("Could not stat '%s'", fullpath);
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return 0;
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}
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if (st.st_mtime > expire)
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return 0;
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if (show_only || verbose) {
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enum object_type type = sha1_object_info(sha1, NULL);
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printf("%s %s\n", sha1_to_hex(sha1),
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(type > 0) ? typename(type) : "unknown");
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}
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if (!show_only)
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unlink_or_warn(fullpath);
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return 0;
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}
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static int prune_cruft(const char *basename, const char *path, void *data)
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{
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if (starts_with(basename, "tmp_obj_"))
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prune_tmp_file(path);
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else
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fprintf(stderr, "bad sha1 file: %s\n", path);
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return 0;
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}
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static int prune_subdir(int nr, const char *path, void *data)
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{
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if (!show_only)
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rmdir(path);
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return 0;
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}
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static int prune_worktree(const char *id, struct strbuf *reason)
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{
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struct stat st;
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char *path;
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int fd, len;
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if (!is_directory(git_path("worktrees/%s", id))) {
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strbuf_addf(reason, _("Removing worktrees/%s: not a valid directory"), id);
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return 1;
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}
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if (file_exists(git_path("worktrees/%s/locked", id)))
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return 0;
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if (stat(git_path("worktrees/%s/gitdir", id), &st)) {
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strbuf_addf(reason, _("Removing worktrees/%s: gitdir file does not exist"), id);
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return 1;
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}
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fd = open(git_path("worktrees/%s/gitdir", id), O_RDONLY);
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if (fd < 0) {
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strbuf_addf(reason, _("Removing worktrees/%s: unable to read gitdir file (%s)"),
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id, strerror(errno));
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return 1;
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}
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len = st.st_size;
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path = xmalloc(len + 1);
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read_in_full(fd, path, len);
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close(fd);
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while (len && (path[len - 1] == '\n' || path[len - 1] == '\r'))
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len--;
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if (!len) {
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strbuf_addf(reason, _("Removing worktrees/%s: invalid gitdir file"), id);
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free(path);
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return 1;
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}
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path[len] = '\0';
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if (!file_exists(path)) {
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struct stat st_link;
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free(path);
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/*
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* the repo is moved manually and has not been
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* accessed since?
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*/
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if (!stat(git_path("worktrees/%s/link", id), &st_link) &&
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st_link.st_nlink > 1)
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return 0;
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strbuf_addf(reason, _("Removing worktrees/%s: gitdir file points to non-existent location"), id);
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return 1;
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}
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free(path);
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return st.st_mtime <= expire;
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}
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static void prune_worktrees(void)
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{
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struct strbuf reason = STRBUF_INIT;
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struct strbuf path = STRBUF_INIT;
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DIR *dir = opendir(git_path("worktrees"));
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struct dirent *d;
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int ret;
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if (!dir)
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return;
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while ((d = readdir(dir)) != NULL) {
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if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
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continue;
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strbuf_reset(&reason);
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if (!prune_worktree(d->d_name, &reason))
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continue;
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if (show_only || verbose)
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printf("%s\n", reason.buf);
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if (show_only)
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continue;
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strbuf_reset(&path);
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strbuf_addstr(&path, git_path("worktrees/%s", d->d_name));
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ret = remove_dir_recursively(&path, 0);
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if (ret < 0 && errno == ENOTDIR)
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ret = unlink(path.buf);
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if (ret)
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error(_("failed to remove: %s"), strerror(errno));
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}
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closedir(dir);
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if (!show_only)
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rmdir(git_path("worktrees"));
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strbuf_release(&reason);
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strbuf_release(&path);
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}
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/*
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* Write errors (particularly out of space) can result in
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* failed temporary packs (and more rarely indexes and other
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* files beginning with "tmp_") accumulating in the object
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* and the pack directories.
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*/
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static void remove_temporary_files(const char *path)
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{
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DIR *dir;
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struct dirent *de;
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dir = opendir(path);
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if (!dir) {
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fprintf(stderr, "Unable to open directory %s\n", path);
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return;
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}
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while ((de = readdir(dir)) != NULL)
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if (starts_with(de->d_name, "tmp_"))
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prune_tmp_file(mkpath("%s/%s", path, de->d_name));
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closedir(dir);
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}
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int cmd_prune(int argc, const char **argv, const char *prefix)
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{
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struct rev_info revs;
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struct progress *progress = NULL;
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int do_prune_worktrees = 0;
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const struct option options[] = {
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OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
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OPT__VERBOSE(&verbose, N_("report pruned objects")),
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OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
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OPT_BOOL(0, "worktrees", &do_prune_worktrees, N_("prune .git/worktrees")),
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OPT_EXPIRY_DATE(0, "expire", &expire,
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N_("expire objects older than <time>")),
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OPT_END()
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};
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char *s;
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expire = ULONG_MAX;
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save_commit_buffer = 0;
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check_replace_refs = 0;
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init_revisions(&revs, prefix);
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argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
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if (do_prune_worktrees) {
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if (argc)
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die(_("--worktrees does not take extra arguments"));
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prune_worktrees();
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return 0;
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}
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while (argc--) {
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unsigned char sha1[20];
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const char *name = *argv++;
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if (!get_sha1(name, sha1)) {
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struct object *object = parse_object_or_die(sha1, name);
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add_pending_object(&revs, object, "");
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}
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else
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die("unrecognized argument: %s", name);
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}
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if (show_progress == -1)
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show_progress = isatty(2);
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if (show_progress)
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progress = start_progress_delay(_("Checking connectivity"), 0, 0, 2);
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mark_reachable_objects(&revs, 1, expire, progress);
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stop_progress(&progress);
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for_each_loose_file_in_objdir(get_object_directory(), prune_object,
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prune_cruft, prune_subdir, NULL);
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prune_packed_objects(show_only ? PRUNE_PACKED_DRY_RUN : 0);
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remove_temporary_files(get_object_directory());
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s = mkpathdup("%s/pack", get_object_directory());
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remove_temporary_files(s);
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free(s);
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if (is_repository_shallow())
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prune_shallow(show_only);
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return 0;
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}
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