builtin/prune.c

   1 #include "cache.h"
   2 #include "commit.h"
   3 #include "diff.h"
   4 #include "environment.h"
   5 #include "gettext.h"
   6 #include "hex.h"
   7 #include "revision.h"
   8 #include "builtin.h"
   9 #include "reachable.h"
  10 #include "parse-options.h"
  11 #include "progress.h"
  12 #include "prune-packed.h"
  13 #include "replace-object.h"
  14 #include "object-store.h"
  15 #include "shallow.h"
  16
  17 static const char * const prune_usage[] = {
  18         N_("git prune [-n] [-v] [--progress] [--expire <time>] [--] [<head>...]"),
  19         NULL
  20 };
  21 static int show_only;
  22 static int verbose;
  23 static timestamp_t expire;
  24 static int show_progress = -1;
  25
  26 static int prune_tmp_file(const char *fullpath)
  27 {
  28         struct stat st;
  29         if (lstat(fullpath, &st))
  30                 return error("Could not stat '%s'", fullpath);
  31         if (st.st_mtime > expire)
  32                 return 0;
  33         if (S_ISDIR(st.st_mode)) {
  34                 if (show_only || verbose)
  35                         printf("Removing stale temporary directory %s\n", fullpath);
  36                 if (!show_only) {
  37                         struct strbuf remove_dir_buf = STRBUF_INIT;
  38
  39                         strbuf_addstr(&remove_dir_buf, fullpath);
  40                         remove_dir_recursively(&remove_dir_buf, 0);
  41                         strbuf_release(&remove_dir_buf);
  42                 }
  43         } else {
  44                 if (show_only || verbose)
  45                         printf("Removing stale temporary file %s\n", fullpath);
  46                 if (!show_only)
  47                         unlink_or_warn(fullpath);
  48         }
  49         return 0;
  50 }
  51
  52 static void perform_reachability_traversal(struct rev_info *revs)
  53 {
  54         static int initialized;
  55         struct progress *progress = NULL;
  56
  57         if (initialized)
  58                 return;
  59
  60         if (show_progress)
  61                 progress = start_delayed_progress(_("Checking connectivity"), 0);
  62         mark_reachable_objects(revs, 1, expire, progress);
  63         stop_progress(&progress);
  64         initialized = 1;
  65 }
  66
  67 static int is_object_reachable(const struct object_id *oid,
  68                                struct rev_info *revs)
  69 {
  70         struct object *obj;
  71
  72         perform_reachability_traversal(revs);
  73
  74         obj = lookup_object(the_repository, oid);
  75         return obj && (obj->flags & SEEN);
  76 }
  77
  78 static int prune_object(const struct object_id *oid, const char *fullpath,
  79                         void *data)
  80 {
  81         struct rev_info *revs = data;
  82         struct stat st;
  83
  84         if (is_object_reachable(oid, revs))
  85                 return 0;
  86
  87         if (lstat(fullpath, &st)) {
  88                 /* report errors, but do not stop pruning */
  89                 error("Could not stat '%s'", fullpath);
  90                 return 0;
  91         }
  92         if (st.st_mtime > expire)
  93                 return 0;
  94         if (show_only || verbose) {
  95                 enum object_type type = oid_object_info(the_repository, oid,
  96                                                         NULL);
  97                 printf("%s %s\n", oid_to_hex(oid),
  98                        (type > 0) ? type_name(type) : "unknown");
  99         }
 100         if (!show_only)
 101                 unlink_or_warn(fullpath);
 102         return 0;
 103 }
 104
 105 static int prune_cruft(const char *basename, const char *path,
 106                        void *data UNUSED)
 107 {
 108         if (starts_with(basename, "tmp_obj_"))
 109                 prune_tmp_file(path);
 110         else
 111                 fprintf(stderr, "bad sha1 file: %s\n", path);
 112         return 0;
 113 }
 114
 115 static int prune_subdir(unsigned int nr UNUSED, const char *path,
 116                         void *data UNUSED)
 117 {
 118         if (!show_only)
 119                 rmdir(path);
 120         return 0;
 121 }
 122
 123 /*
 124  * Write errors (particularly out of space) can result in
 125  * failed temporary packs (and more rarely indexes and other
 126  * files beginning with "tmp_") accumulating in the object
 127  * and the pack directories.
 128  */
 129 static void remove_temporary_files(const char *path)
 130 {
 131         DIR *dir;
 132         struct dirent *de;
 133
 134         dir = opendir(path);
 135         if (!dir) {
 136                 if (errno != ENOENT)
 137                         fprintf(stderr, "Unable to open directory %s: %s\n",
 138                                 path, strerror(errno));
 139                 return;
 140         }
 141         while ((de = readdir(dir)) != NULL)
 142                 if (starts_with(de->d_name, "tmp_"))
 143                         prune_tmp_file(mkpath("%s/%s", path, de->d_name));
 144         closedir(dir);
 145 }
 146
 147 int cmd_prune(int argc, const char **argv, const char *prefix)
 148 {
 149         struct rev_info revs;
 150         int exclude_promisor_objects = 0;
 151         const struct option options[] = {
 152                 OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
 153                 OPT__VERBOSE(&verbose, N_("report pruned objects")),
 154                 OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
 155                 OPT_EXPIRY_DATE(0, "expire", &expire,
 156                                 N_("expire objects older than <time>")),
 157                 OPT_BOOL(0, "exclude-promisor-objects", &exclude_promisor_objects,
 158                          N_("limit traversal to objects outside promisor packfiles")),
 159                 OPT_END()
 160         };
 161         char *s;
 162
 163         expire = TIME_MAX;
 164         save_commit_buffer = 0;
 165         read_replace_refs = 0;
 166         repo_init_revisions(the_repository, &revs, prefix);
 167
 168         argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
 169
 170         if (repository_format_precious_objects)
 171                 die(_("cannot prune in a precious-objects repo"));
 172
 173         while (argc--) {
 174                 struct object_id oid;
 175                 const char *name = *argv++;
 176
 177                 if (!get_oid(name, &oid)) {
 178                         struct object *object = parse_object_or_die(&oid,
 179                                                                     name);
 180                         add_pending_object(&revs, object, "");
 181                 }
 182                 else
 183                         die("unrecognized argument: %s", name);
 184         }
 185
 186         if (show_progress == -1)
 187                 show_progress = isatty(2);
 188         if (exclude_promisor_objects) {
 189                 fetch_if_missing = 0;
 190                 revs.exclude_promisor_objects = 1;
 191         }
 192
 193         for_each_loose_file_in_objdir(get_object_directory(), prune_object,
 194                                       prune_cruft, prune_subdir, &revs);
 195
 196         prune_packed_objects(show_only ? PRUNE_PACKED_DRY_RUN : 0);
 197         remove_temporary_files(get_object_directory());
 198         s = mkpathdup("%s/pack", get_object_directory());
 199         remove_temporary_files(s);
 200         free(s);
 201
 202         if (is_repository_shallow(the_repository)) {
 203                 perform_reachability_traversal(&revs);
 204                 prune_shallow(show_only ? PRUNE_SHOW_ONLY : 0);
 205         }
 206
 207         release_revisions(&revs);
 208         return 0;
 209 }