Andrew's git - gitweb.git/blob

   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
  10static const char * const prune_usage[] = {
  11        N_("git prune [-n] [-v] [--expire <time>] [--] [<head>...]"),
  12        NULL
  13};
  14static int show_only;
  15static int verbose;
  16static unsigned long expire;
  17static int show_progress = -1;
  18
  19static int prune_tmp_file(const char *fullpath)
  20{
  21        struct stat st;
  22        if (lstat(fullpath, &st))
  23                return error("Could not stat '%s'", fullpath);
  24        if (st.st_mtime > expire)
  25                return 0;
  26        if (show_only || verbose)
  27                printf("Removing stale temporary file %s\n", fullpath);
  28        if (!show_only)
  29                unlink_or_warn(fullpath);
  30        return 0;
  31}
  32
  33static int prune_object(const unsigned char *sha1, const char *fullpath,
  34                        void *data)
  35{
  36        struct stat st;
  37
  38        /*
  39         * Do we know about this object?
  40         * It must have been reachable
  41         */
  42        if (lookup_object(sha1))
  43                return 0;
  44
  45        if (lstat(fullpath, &st)) {
  46                /* report errors, but do not stop pruning */
  47                error("Could not stat '%s'", fullpath);
  48                return 0;
  49        }
  50        if (st.st_mtime > expire)
  51                return 0;
  52        if (show_only || verbose) {
  53                enum object_type type = sha1_object_info(sha1, NULL);
  54                printf("%s %s\n", sha1_to_hex(sha1),
  55                       (type > 0) ? typename(type) : "unknown");
  56        }
  57        if (!show_only)
  58                unlink_or_warn(fullpath);
  59        return 0;
  60}
  61
  62static int prune_cruft(const char *basename, const char *path, void *data)
  63{
  64        if (starts_with(basename, "tmp_obj_"))
  65                prune_tmp_file(path);
  66        else
  67                fprintf(stderr, "bad sha1 file: %s\n", path);
  68        return 0;
  69}
  70
  71static int prune_subdir(int nr, const char *path, void *data)
  72{
  73        if (!show_only)
  74                rmdir(path);
  75        return 0;
  76}
  77
  78/*
  79 * Write errors (particularly out of space) can result in
  80 * failed temporary packs (and more rarely indexes and other
  81 * files beginning with "tmp_") accumulating in the object
  82 * and the pack directories.
  83 */
  84static void remove_temporary_files(const char *path)
  85{
  86        DIR *dir;
  87        struct dirent *de;
  88
  89        dir = opendir(path);
  90        if (!dir) {
  91                fprintf(stderr, "Unable to open directory %s\n", path);
  92                return;
  93        }
  94        while ((de = readdir(dir)) != NULL)
  95                if (starts_with(de->d_name, "tmp_"))
  96                        prune_tmp_file(mkpath("%s/%s", path, de->d_name));
  97        closedir(dir);
  98}
  99
 100int cmd_prune(int argc, const char **argv, const char *prefix)
 101{
 102        struct rev_info revs;
 103        struct progress *progress = NULL;
 104        const struct option options[] = {
 105                OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
 106                OPT__VERBOSE(&verbose, N_("report pruned objects")),
 107                OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
 108                OPT_EXPIRY_DATE(0, "expire", &expire,
 109                                N_("expire objects older than <time>")),
 110                OPT_END()
 111        };
 112        char *s;
 113
 114        expire = ULONG_MAX;
 115        save_commit_buffer = 0;
 116        check_replace_refs = 0;
 117        ref_paranoia = 1;
 118        init_revisions(&revs, prefix);
 119
 120        argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
 121
 122        while (argc--) {
 123                unsigned char sha1[20];
 124                const char *name = *argv++;
 125
 126                if (!get_sha1(name, sha1)) {
 127                        struct object *object = parse_object_or_die(sha1, name);
 128                        add_pending_object(&revs, object, "");
 129                }
 130                else
 131                        die("unrecognized argument: %s", name);
 132        }
 133
 134        if (show_progress == -1)
 135                show_progress = isatty(2);
 136        if (show_progress)
 137                progress = start_progress_delay(_("Checking connectivity"), 0, 0, 2);
 138
 139        mark_reachable_objects(&revs, 1, expire, progress);
 140        stop_progress(&progress);
 141        for_each_loose_file_in_objdir(get_object_directory(), prune_object,
 142                                      prune_cruft, prune_subdir, NULL);
 143
 144        prune_packed_objects(show_only ? PRUNE_PACKED_DRY_RUN : 0);
 145        remove_temporary_files(get_object_directory());
 146        s = mkpathdup("%s/pack", get_object_directory());
 147        remove_temporary_files(s);
 148        free(s);
 149
 150        if (is_repository_shallow())
 151                prune_shallow(show_only);
 152
 153        return 0;
 154}