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
   9static const char * const prune_usage[] = {
  10        "git-prune [-n] [--expire <time>] [--] [<head>...]",
  11        NULL
  12};
  13static int show_only;
  14static unsigned long expire;
  15
  16static int prune_object(char *path, const char *filename, const unsigned char *sha1)
  17{
  18        const char *fullpath = mkpath("%s/%s", path, filename);
  19        if (expire) {
  20                struct stat st;
  21                if (lstat(fullpath, &st))
  22                        return error("Could not stat '%s'", fullpath);
  23                if (st.st_mtime > expire)
  24                        return 0;
  25        }
  26        if (show_only) {
  27                enum object_type type = sha1_object_info(sha1, NULL);
  28                printf("%s %s\n", sha1_to_hex(sha1),
  29                       (type > 0) ? typename(type) : "unknown");
  30        } else
  31                unlink(fullpath);
  32        return 0;
  33}
  34
  35static int prune_dir(int i, char *path)
  36{
  37        DIR *dir = opendir(path);
  38        struct dirent *de;
  39
  40        if (!dir)
  41                return 0;
  42
  43        while ((de = readdir(dir)) != NULL) {
  44                char name[100];
  45                unsigned char sha1[20];
  46                int len = strlen(de->d_name);
  47
  48                switch (len) {
  49                case 2:
  50                        if (de->d_name[1] != '.')
  51                                break;
  52                case 1:
  53                        if (de->d_name[0] != '.')
  54                                break;
  55                        continue;
  56                case 38:
  57                        sprintf(name, "%02x", i);
  58                        memcpy(name+2, de->d_name, len+1);
  59                        if (get_sha1_hex(name, sha1) < 0)
  60                                break;
  61
  62                        /*
  63                         * Do we know about this object?
  64                         * It must have been reachable
  65                         */
  66                        if (lookup_object(sha1))
  67                                continue;
  68
  69                        prune_object(path, de->d_name, sha1);
  70                        continue;
  71                }
  72                fprintf(stderr, "bad sha1 file: %s/%s\n", path, de->d_name);
  73        }
  74        if (!show_only)
  75                rmdir(path);
  76        closedir(dir);
  77        return 0;
  78}
  79
  80static void prune_object_dir(const char *path)
  81{
  82        int i;
  83        for (i = 0; i < 256; i++) {
  84                static char dir[4096];
  85                sprintf(dir, "%s/%02x", path, i);
  86                prune_dir(i, dir);
  87        }
  88}
  89
  90/*
  91 * Write errors (particularly out of space) can result in
  92 * failed temporary packs (and more rarely indexes and other
  93 * files begining with "tmp_") accumulating in the
  94 * object directory.
  95 */
  96static void remove_temporary_files(void)
  97{
  98        DIR *dir;
  99        struct dirent *de;
 100        char* dirname=get_object_directory();
 101
 102        dir = opendir(dirname);
 103        if (!dir) {
 104                fprintf(stderr, "Unable to open object directory %s\n",
 105                        dirname);
 106                return;
 107        }
 108        while ((de = readdir(dir)) != NULL) {
 109                if (!prefixcmp(de->d_name, "tmp_")) {
 110                        char name[PATH_MAX];
 111                        int c = snprintf(name, PATH_MAX, "%s/%s",
 112                                         dirname, de->d_name);
 113                        if (c < 0 || c >= PATH_MAX)
 114                                continue;
 115                        if (expire) {
 116                                struct stat st;
 117                                if (stat(name, &st) != 0 || st.st_mtime >= expire)
 118                                        continue;
 119                        }
 120                        printf("Removing stale temporary file %s\n", name);
 121                        if (!show_only)
 122                                unlink(name);
 123                }
 124        }
 125        closedir(dir);
 126}
 127
 128int cmd_prune(int argc, const char **argv, const char *prefix)
 129{
 130        struct rev_info revs;
 131        const struct option options[] = {
 132                OPT_BOOLEAN('n', NULL, &show_only,
 133                            "do not remove, show only"),
 134                OPT_DATE(0, "expire", &expire,
 135                         "expire objects older than <time>"),
 136                OPT_END()
 137        };
 138
 139        save_commit_buffer = 0;
 140        init_revisions(&revs, prefix);
 141
 142        argc = parse_options(argc, argv, options, prune_usage, 0);
 143        while (argc--) {
 144                unsigned char sha1[20];
 145                const char *name = *argv++;
 146
 147                if (!get_sha1(name, sha1)) {
 148                        struct object *object = parse_object(sha1);
 149                        if (!object)
 150                                die("bad object: %s", name);
 151                        add_pending_object(&revs, object, "");
 152                }
 153                else
 154                        die("unrecognized argument: %s", name);
 155        }
 156        mark_reachable_objects(&revs, 1);
 157        prune_object_dir(get_object_directory());
 158
 159        sync();
 160        prune_packed_objects(show_only);
 161        remove_temporary_files();
 162        return 0;
 163}