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_object(const char *path, const char *filename)
  21{
  22        const char *fullpath = mkpath("%s/%s", path, filename);
  23        struct stat st;
  24        if (lstat(fullpath, &st))
  25                return error("Could not stat '%s'", fullpath);
  26        if (st.st_mtime > expire)
  27                return 0;
  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(char *path, const char *filename, const unsigned char *sha1)
  35{
  36        const char *fullpath = mkpath("%s/%s", path, filename);
  37        struct stat st;
  38        if (lstat(fullpath, &st))
  39                return error("Could not stat '%s'", fullpath);
  40        if (st.st_mtime > expire)
  41                return 0;
  42        if (show_only || verbose) {
  43                enum object_type type = sha1_object_info(sha1, NULL);
  44                printf("%s %s\n", sha1_to_hex(sha1),
  45                       (type > 0) ? typename(type) : "unknown");
  46        }
  47        if (!show_only)
  48                unlink_or_warn(fullpath);
  49        return 0;
  50}
  51
  52static int prune_dir(int i, char *path)
  53{
  54        DIR *dir = opendir(path);
  55        struct dirent *de;
  56
  57        if (!dir)
  58                return 0;
  59
  60        while ((de = readdir(dir)) != NULL) {
  61                char name[100];
  62                unsigned char sha1[20];
  63
  64                if (is_dot_or_dotdot(de->d_name))
  65                        continue;
  66                if (strlen(de->d_name) == 38) {
  67                        sprintf(name, "%02x", i);
  68                        memcpy(name+2, de->d_name, 39);
  69                        if (get_sha1_hex(name, sha1) < 0)
  70                                break;
  71
  72                        /*
  73                         * Do we know about this object?
  74                         * It must have been reachable
  75                         */
  76                        if (lookup_object(sha1))
  77                                continue;
  78
  79                        prune_object(path, de->d_name, sha1);
  80                        continue;
  81                }
  82                if (!prefixcmp(de->d_name, "tmp_obj_")) {
  83                        prune_tmp_object(path, de->d_name);
  84                        continue;
  85                }
  86                fprintf(stderr, "bad sha1 file: %s/%s\n", path, de->d_name);
  87        }
  88        closedir(dir);
  89        if (!show_only)
  90                rmdir(path);
  91        return 0;
  92}
  93
  94static void prune_object_dir(const char *path)
  95{
  96        int i;
  97        for (i = 0; i < 256; i++) {
  98                static char dir[4096];
  99                sprintf(dir, "%s/%02x", path, i);
 100                prune_dir(i, dir);
 101        }
 102}
 103
 104/*
 105 * Write errors (particularly out of space) can result in
 106 * failed temporary packs (and more rarely indexes and other
 107 * files beginning with "tmp_") accumulating in the object
 108 * and the pack directories.
 109 */
 110static void remove_temporary_files(const char *path)
 111{
 112        DIR *dir;
 113        struct dirent *de;
 114
 115        dir = opendir(path);
 116        if (!dir) {
 117                fprintf(stderr, "Unable to open directory %s\n", path);
 118                return;
 119        }
 120        while ((de = readdir(dir)) != NULL)
 121                if (!prefixcmp(de->d_name, "tmp_"))
 122                        prune_tmp_object(path, de->d_name);
 123        closedir(dir);
 124}
 125
 126int cmd_prune(int argc, const char **argv, const char *prefix)
 127{
 128        struct rev_info revs;
 129        struct progress *progress = NULL;
 130        const struct option options[] = {
 131                OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
 132                OPT__VERBOSE(&verbose, N_("report pruned objects")),
 133                OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
 134                OPT_DATE(0, "expire", &expire,
 135                         N_("expire objects older than <time>")),
 136                OPT_END()
 137        };
 138        char *s;
 139
 140        expire = ULONG_MAX;
 141        save_commit_buffer = 0;
 142        read_replace_refs = 0;
 143        init_revisions(&revs, prefix);
 144
 145        argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
 146        while (argc--) {
 147                unsigned char sha1[20];
 148                const char *name = *argv++;
 149
 150                if (!get_sha1(name, sha1)) {
 151                        struct object *object = parse_object(sha1);
 152                        if (!object)
 153                                die("bad object: %s", name);
 154                        add_pending_object(&revs, object, "");
 155                }
 156                else
 157                        die("unrecognized argument: %s", name);
 158        }
 159
 160        if (show_progress == -1)
 161                show_progress = isatty(2);
 162        if (show_progress)
 163                progress = start_progress_delay("Checking connectivity", 0, 0, 2);
 164
 165        mark_reachable_objects(&revs, 1, progress);
 166        stop_progress(&progress);
 167        prune_object_dir(get_object_directory());
 168
 169        prune_packed_objects(show_only);
 170        remove_temporary_files(get_object_directory());
 171        s = xstrdup(mkpath("%s/pack", get_object_directory()));
 172        remove_temporary_files(s);
 173        free(s);
 174        return 0;
 175}