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https://github.com/git/git.git
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067fbd4105
If this extension is used in a repository, then no operations should run which may drop objects from the object storage. This can be useful if you are sharing that storage with other repositories whose refs you cannot see. For instance, if you do: $ git clone -s parent child $ git -C parent config extensions.preciousObjects true $ git -C parent config core.repositoryformatversion 1 you now have additional safety when running git in the parent repository. Prunes and repacks will bail with an error, and `git gc` will skip those operations (it will continue to pack refs and do other non-object operations). Older versions of git, when run in the repository, will fail on every operation. Note that we do not set the preciousObjects extension by default when doing a "clone -s", as doing so breaks backwards compatibility. It is a decision the user should make explicitly. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
257 lines
6.2 KiB
C
257 lines
6.2 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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if (st.st_mtime <= expire) {
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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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} else {
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return 0;
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}
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}
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free(path);
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return 0;
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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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ref_paranoia = 1;
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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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if (repository_format_precious_objects)
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die(_("cannot prune in a precious-objects repo"));
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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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