builtin/prune.c

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