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] [-v] [--expire <time>] [--] [<head>...]",
  11        NULL
  12};
  13static int show_only;
  14static int verbose;
  15static unsigned long expire;
  16
  17static int prune_tmp_object(const char *path, const char *filename)
  18{
  19        const char *fullpath = mkpath("%s/%s", path, filename);
  20        if (expire) {
  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        }
  27        printf("Removing stale temporary file %s\n", fullpath);
  28        if (!show_only)
  29                unlink(fullpath);
  30        return 0;
  31}
  32
  33static int prune_object(char *path, const char *filename, const unsigned char *sha1)
  34{
  35        const char *fullpath = mkpath("%s/%s", path, filename);
  36        if (expire) {
  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        }
  43        if (show_only || verbose) {
  44                enum object_type type = sha1_object_info(sha1, NULL);
  45                printf("%s %s\n", sha1_to_hex(sha1),
  46                       (type > 0) ? typename(type) : "unknown");
  47        }
  48        if (!show_only)
  49                unlink(fullpath);
  50        return 0;
  51}
  52
  53static int prune_dir(int i, char *path)
  54{
  55        DIR *dir = opendir(path);
  56        struct dirent *de;
  57
  58        if (!dir)
  59                return 0;
  60
  61        while ((de = readdir(dir)) != NULL) {
  62                char name[100];
  63                unsigned char sha1[20];
  64                int len = strlen(de->d_name);
  65
  66                switch (len) {
  67                case 2:
  68                        if (de->d_name[1] != '.')
  69                                break;
  70                case 1:
  71                        if (de->d_name[0] != '.')
  72                                break;
  73                        continue;
  74                case 38:
  75                        sprintf(name, "%02x", i);
  76                        memcpy(name+2, de->d_name, len+1);
  77                        if (get_sha1_hex(name, sha1) < 0)
  78                                break;
  79
  80                        /*
  81                         * Do we know about this object?
  82                         * It must have been reachable
  83                         */
  84                        if (lookup_object(sha1))
  85                                continue;
  86
  87                        prune_object(path, de->d_name, sha1);
  88                        continue;
  89                }
  90                if (!prefixcmp(de->d_name, "tmp_obj_")) {
  91                        prune_tmp_object(path, de->d_name);
  92                        continue;
  93                }
  94                fprintf(stderr, "bad sha1 file: %s/%s\n", path, de->d_name);
  95        }
  96        if (!show_only)
  97                rmdir(path);
  98        closedir(dir);
  99        return 0;
 100}
 101
 102static void prune_object_dir(const char *path)
 103{
 104        int i;
 105        for (i = 0; i < 256; i++) {
 106                static char dir[4096];
 107                sprintf(dir, "%s/%02x", path, i);
 108                prune_dir(i, dir);
 109        }
 110}
 111
 112/*
 113 * Write errors (particularly out of space) can result in
 114 * failed temporary packs (and more rarely indexes and other
 115 * files begining with "tmp_") accumulating in the object
 116 * and the pack directories.
 117 */
 118static void remove_temporary_files(const char *path)
 119{
 120        DIR *dir;
 121        struct dirent *de;
 122
 123        dir = opendir(path);
 124        if (!dir) {
 125                fprintf(stderr, "Unable to open directory %s\n", path);
 126                return;
 127        }
 128        while ((de = readdir(dir)) != NULL)
 129                if (!prefixcmp(de->d_name, "tmp_"))
 130                        prune_tmp_object(path, de->d_name);
 131        closedir(dir);
 132}
 133
 134int cmd_prune(int argc, const char **argv, const char *prefix)
 135{
 136        struct rev_info revs;
 137        const struct option options[] = {
 138                OPT_BOOLEAN('n', NULL, &show_only,
 139                            "do not remove, show only"),
 140                OPT_BOOLEAN('v', NULL, &verbose,
 141                        "report pruned objects"),
 142                OPT_DATE(0, "expire", &expire,
 143                         "expire objects older than <time>"),
 144                OPT_END()
 145        };
 146        char *s;
 147
 148        save_commit_buffer = 0;
 149        init_revisions(&revs, prefix);
 150
 151        argc = parse_options(argc, argv, options, prune_usage, 0);
 152        while (argc--) {
 153                unsigned char sha1[20];
 154                const char *name = *argv++;
 155
 156                if (!get_sha1(name, sha1)) {
 157                        struct object *object = parse_object(sha1);
 158                        if (!object)
 159                                die("bad object: %s", name);
 160                        add_pending_object(&revs, object, "");
 161                }
 162                else
 163                        die("unrecognized argument: %s", name);
 164        }
 165        mark_reachable_objects(&revs, 1);
 166        prune_object_dir(get_object_directory());
 167
 168        prune_packed_objects(show_only);
 169        remove_temporary_files(get_object_directory());
 170        s = xstrdup(mkpath("%s/pack", get_object_directory()));
 171        remove_temporary_files(s);
 172        free(s);
 173        return 0;
 174}