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 char *fullpath, const unsigned char *sha1)
  35{
  36        struct stat st;
  37        if (lstat(fullpath, &st))
  38                return error("Could not stat '%s'", fullpath);
  39        if (st.st_mtime > expire)
  40                return 0;
  41        if (show_only || verbose) {
  42                enum object_type type = sha1_object_info(sha1, NULL);
  43                printf("%s %s\n", sha1_to_hex(sha1),
  44                       (type > 0) ? typename(type) : "unknown");
  45        }
  46        if (!show_only)
  47                unlink_or_warn(fullpath);
  48        return 0;
  49}
  50
  51static int prune_dir(int i, struct strbuf *path)
  52{
  53        size_t baselen = path->len;
  54        DIR *dir = opendir(path->buf);
  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                        strbuf_addf(path, "/%s", de->d_name);
  80                        prune_object(path->buf, sha1);
  81                        strbuf_setlen(path, baselen);
  82                        continue;
  83                }
  84                if (starts_with(de->d_name, "tmp_obj_")) {
  85                        strbuf_addf(path, "/%s", de->d_name);
  86                        prune_tmp_file(path->buf);
  87                        strbuf_setlen(path, baselen);
  88                        continue;
  89                }
  90                fprintf(stderr, "bad sha1 file: %s/%s\n", path->buf, de->d_name);
  91        }
  92        closedir(dir);
  93        if (!show_only)
  94                rmdir(path->buf);
  95        return 0;
  96}
  97
  98static void prune_object_dir(const char *path)
  99{
 100        struct strbuf buf = STRBUF_INIT;
 101        size_t baselen;
 102        int i;
 103
 104        strbuf_addstr(&buf, path);
 105        strbuf_addch(&buf, '/');
 106        baselen = buf.len;
 107
 108        for (i = 0; i < 256; i++) {
 109                strbuf_addf(&buf, "%02x", i);
 110                prune_dir(i, &buf);
 111                strbuf_setlen(&buf, baselen);
 112        }
 113}
 114
 115/*
 116 * Write errors (particularly out of space) can result in
 117 * failed temporary packs (and more rarely indexes and other
 118 * files beginning with "tmp_") accumulating in the object
 119 * and the pack directories.
 120 */
 121static void remove_temporary_files(const char *path)
 122{
 123        DIR *dir;
 124        struct dirent *de;
 125
 126        dir = opendir(path);
 127        if (!dir) {
 128                fprintf(stderr, "Unable to open directory %s\n", path);
 129                return;
 130        }
 131        while ((de = readdir(dir)) != NULL)
 132                if (starts_with(de->d_name, "tmp_"))
 133                        prune_tmp_file(mkpath("%s/%s", path, de->d_name));
 134        closedir(dir);
 135}
 136
 137int cmd_prune(int argc, const char **argv, const char *prefix)
 138{
 139        struct rev_info revs;
 140        struct progress *progress = NULL;
 141        const struct option options[] = {
 142                OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
 143                OPT__VERBOSE(&verbose, N_("report pruned objects")),
 144                OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
 145                OPT_EXPIRY_DATE(0, "expire", &expire,
 146                                N_("expire objects older than <time>")),
 147                OPT_END()
 148        };
 149        char *s;
 150
 151        expire = ULONG_MAX;
 152        save_commit_buffer = 0;
 153        read_replace_refs = 0;
 154        init_revisions(&revs, prefix);
 155
 156        argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
 157        while (argc--) {
 158                unsigned char sha1[20];
 159                const char *name = *argv++;
 160
 161                if (!get_sha1(name, sha1)) {
 162                        struct object *object = parse_object_or_die(sha1, name);
 163                        add_pending_object(&revs, object, "");
 164                }
 165                else
 166                        die("unrecognized argument: %s", name);
 167        }
 168
 169        if (show_progress == -1)
 170                show_progress = isatty(2);
 171        if (show_progress)
 172                progress = start_progress_delay("Checking connectivity", 0, 0, 2);
 173
 174        mark_reachable_objects(&revs, 1, progress);
 175        stop_progress(&progress);
 176        prune_object_dir(get_object_directory());
 177
 178        prune_packed_objects(show_only ? PRUNE_PACKED_DRY_RUN : 0);
 179        remove_temporary_files(get_object_directory());
 180        s = mkpathdup("%s/pack", get_object_directory());
 181        remove_temporary_files(s);
 182        free(s);
 183
 184        if (is_repository_shallow())
 185                prune_shallow(show_only);
 186
 187        return 0;
 188}