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