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#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
  79/*
  80 * Write errors (particularly out of space) can result in
  81 * failed temporary packs (and more rarely indexes and other
  82 * files beginning with "tmp_") accumulating in the object
  83 * and the pack directories.
  84 */
  85static void remove_temporary_files(const char *path)
  86{
  87        DIR *dir;
  88        struct dirent *de;
  89
  90        dir = opendir(path);
  91        if (!dir) {
  92                fprintf(stderr, "Unable to open directory %s\n", path);
  93                return;
  94        }
  95        while ((de = readdir(dir)) != NULL)
  96                if (starts_with(de->d_name, "tmp_"))
  97                        prune_tmp_file(mkpath("%s/%s", path, de->d_name));
  98        closedir(dir);
  99}
 100
 101int cmd_prune(int argc, const char **argv, const char *prefix)
 102{
 103        struct rev_info revs;
 104        struct progress *progress = NULL;
 105        const struct option options[] = {
 106                OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
 107                OPT__VERBOSE(&verbose, N_("report pruned objects")),
 108                OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
 109                OPT_EXPIRY_DATE(0, "expire", &expire,
 110                                N_("expire objects older than <time>")),
 111                OPT_END()
 112        };
 113        char *s;
 114
 115        expire = ULONG_MAX;
 116        save_commit_buffer = 0;
 117        check_replace_refs = 0;
 118        ref_paranoia = 1;
 119        init_revisions(&revs, prefix);
 120
 121        argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
 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}