Andrew's git / gitweb.git / builtin/prune.c
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builtin / prune.con commit checkout: reject if the branch is already checked out elsewhere (5883034)
   1#include "cache.h"
   2#include "commit.h"
   3#include "diff.h"
   4#include "revision.h"
   5#include "builtin.h"
   6#include "reachable.h"
   7#include "parse-options.h"
   8#include "progress.h"
   9#include "dir.h"
  10
  11static const char * const prune_usage[] = {
  12        N_("git prune [-n] [-v] [--expire <time>] [--] [<head>...]"),
  13        NULL
  14};
  15static int show_only;
  16static int verbose;
  17static unsigned long expire;
  18static int show_progress = -1;
  19
  20static int prune_tmp_file(const char *fullpath)
  21{
  22        struct stat st;
  23        if (lstat(fullpath, &st))
  24                return error("Could not stat '%s'", fullpath);
  25        if (st.st_mtime > expire)
  26                return 0;
  27        if (show_only || verbose)
  28                printf("Removing stale temporary file %s\n", fullpath);
  29        if (!show_only)
  30                unlink_or_warn(fullpath);
  31        return 0;
  32}
  33
  34static int prune_object(const unsigned char *sha1, const char *fullpath,
  35                        void *data)
  36{
  37        struct stat st;
  38
  39        /*
  40         * Do we know about this object?
  41         * It must have been reachable
  42         */
  43        if (lookup_object(sha1))
  44                return 0;
  45
  46        if (lstat(fullpath, &st)) {
  47                /* report errors, but do not stop pruning */
  48                error("Could not stat '%s'", fullpath);
  49                return 0;
  50        }
  51        if (st.st_mtime > expire)
  52                return 0;
  53        if (show_only || verbose) {
  54                enum object_type type = sha1_object_info(sha1, NULL);
  55                printf("%s %s\n", sha1_to_hex(sha1),
  56                       (type > 0) ? typename(type) : "unknown");
  57        }
  58        if (!show_only)
  59                unlink_or_warn(fullpath);
  60        return 0;
  61}
  62
  63static int prune_cruft(const char *basename, const char *path, void *data)
  64{
  65        if (starts_with(basename, "tmp_obj_"))
  66                prune_tmp_file(path);
  67        else
  68                fprintf(stderr, "bad sha1 file: %s\n", path);
  69        return 0;
  70}
  71
  72static int prune_subdir(int nr, const char *path, void *data)
  73{
  74        if (!show_only)
  75                rmdir(path);
  76        return 0;
  77}
  78
  79static int prune_worktree(const char *id, struct strbuf *reason)
  80{
  81        struct stat st;
  82        char *path;
  83        int fd, len;
  84
  85        if (!is_directory(git_path("worktrees/%s", id))) {
  86                strbuf_addf(reason, _("Removing worktrees/%s: not a valid directory"), id);
  87                return 1;
  88        }
  89        if (file_exists(git_path("worktrees/%s/locked", id)))
  90                return 0;
  91        if (stat(git_path("worktrees/%s/gitdir", id), &st)) {
  92                strbuf_addf(reason, _("Removing worktrees/%s: gitdir file does not exist"), id);
  93                return 1;
  94        }
  95        fd = open(git_path("worktrees/%s/gitdir", id), O_RDONLY);
  96        if (fd < 0) {
  97                strbuf_addf(reason, _("Removing worktrees/%s: unable to read gitdir file (%s)"),
  98                            id, strerror(errno));
  99                return 1;
 100        }
 101        len = st.st_size;
 102        path = xmalloc(len + 1);
 103        read_in_full(fd, path, len);
 104        close(fd);
 105        while (len && (path[len - 1] == '\n' || path[len - 1] == '\r'))
 106                len--;
 107        if (!len) {
 108                strbuf_addf(reason, _("Removing worktrees/%s: invalid gitdir file"), id);
 109                free(path);
 110                return 1;
 111        }
 112        path[len] = '\0';
 113        if (!file_exists(path)) {
 114                struct stat st_link;
 115                free(path);
 116                /*
 117                 * the repo is moved manually and has not been
 118                 * accessed since?
 119                 */
 120                if (!stat(git_path("worktrees/%s/link", id), &st_link) &&
 121                    st_link.st_nlink > 1)
 122                        return 0;
 123                strbuf_addf(reason, _("Removing worktrees/%s: gitdir file points to non-existent location"), id);
 124                return 1;
 125        }
 126        free(path);
 127        return st.st_mtime <= expire;
 128}
 129
 130static void prune_worktrees(void)
 131{
 132        struct strbuf reason = STRBUF_INIT;
 133        struct strbuf path = STRBUF_INIT;
 134        DIR *dir = opendir(git_path("worktrees"));
 135        struct dirent *d;
 136        int ret;
 137        if (!dir)
 138                return;
 139        while ((d = readdir(dir)) != NULL) {
 140                if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
 141                        continue;
 142                strbuf_reset(&reason);
 143                if (!prune_worktree(d->d_name, &reason))
 144                        continue;
 145                if (show_only || verbose)
 146                        printf("%s\n", reason.buf);
 147                if (show_only)
 148                        continue;
 149                strbuf_reset(&path);
 150                strbuf_addstr(&path, git_path("worktrees/%s", d->d_name));
 151                ret = remove_dir_recursively(&path, 0);
 152                if (ret < 0 && errno == ENOTDIR)
 153                        ret = unlink(path.buf);
 154                if (ret)
 155                        error(_("failed to remove: %s"), strerror(errno));
 156        }
 157        closedir(dir);
 158        if (!show_only)
 159                rmdir(git_path("worktrees"));
 160        strbuf_release(&reason);
 161        strbuf_release(&path);
 162}
 163
 164/*
 165 * Write errors (particularly out of space) can result in
 166 * failed temporary packs (and more rarely indexes and other
 167 * files beginning with "tmp_") accumulating in the object
 168 * and the pack directories.
 169 */
 170static void remove_temporary_files(const char *path)
 171{
 172        DIR *dir;
 173        struct dirent *de;
 174
 175        dir = opendir(path);
 176        if (!dir) {
 177                fprintf(stderr, "Unable to open directory %s\n", path);
 178                return;
 179        }
 180        while ((de = readdir(dir)) != NULL)
 181                if (starts_with(de->d_name, "tmp_"))
 182                        prune_tmp_file(mkpath("%s/%s", path, de->d_name));
 183        closedir(dir);
 184}
 185
 186int cmd_prune(int argc, const char **argv, const char *prefix)
 187{
 188        struct rev_info revs;
 189        struct progress *progress = NULL;
 190        int do_prune_worktrees = 0;
 191        const struct option options[] = {
 192                OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
 193                OPT__VERBOSE(&verbose, N_("report pruned objects")),
 194                OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
 195                OPT_BOOL(0, "worktrees", &do_prune_worktrees, N_("prune .git/worktrees")),
 196                OPT_EXPIRY_DATE(0, "expire", &expire,
 197                                N_("expire objects older than <time>")),
 198                OPT_END()
 199        };
 200        char *s;
 201
 202        expire = ULONG_MAX;
 203        save_commit_buffer = 0;
 204        check_replace_refs = 0;
 205        init_revisions(&revs, prefix);
 206
 207        argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
 208
 209        if (do_prune_worktrees) {
 210                if (argc)
 211                        die(_("--worktrees does not take extra arguments"));
 212                prune_worktrees();
 213                return 0;
 214        }
 215
 216        while (argc--) {
 217                unsigned char sha1[20];
 218                const char *name = *argv++;
 219
 220                if (!get_sha1(name, sha1)) {
 221                        struct object *object = parse_object_or_die(sha1, name);
 222                        add_pending_object(&revs, object, "");
 223                }
 224                else
 225                        die("unrecognized argument: %s", name);
 226        }
 227
 228        if (show_progress == -1)
 229                show_progress = isatty(2);
 230        if (show_progress)
 231                progress = start_progress_delay(_("Checking connectivity"), 0, 0, 2);
 232
 233        mark_reachable_objects(&revs, 1, expire, progress);
 234        stop_progress(&progress);
 235        for_each_loose_file_in_objdir(get_object_directory(), prune_object,
 236                                      prune_cruft, prune_subdir, NULL);
 237
 238        prune_packed_objects(show_only ? PRUNE_PACKED_DRY_RUN : 0);
 239        remove_temporary_files(get_object_directory());
 240        s = mkpathdup("%s/pack", get_object_directory());
 241        remove_temporary_files(s);
 242        free(s);
 243
 244        if (is_repository_shallow())
 245                prune_shallow(show_only);
 246
 247        return 0;
 248}