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-name.h"
  15 #include "object-store.h"
  16 #include "shallow.h"
  17
  18 static const char * const prune_usage[] = {
  19         N_("git prune [-n] [-v] [--progress] [--expire <time>] [--] [<head>...]"),
  20         NULL
  21 };
  22 static int show_only;
  23 static int verbose;
  24 static timestamp_t expire;
  25 static int show_progress = -1;
  26
  27 static int prune_tmp_file(const char *fullpath)
  28 {
  29         struct stat st;
  30         if (lstat(fullpath, &st))
  31                 return error("Could not stat '%s'", fullpath);
  32         if (st.st_mtime > expire)
  33                 return 0;
  34         if (S_ISDIR(st.st_mode)) {
  35                 if (show_only || verbose)
  36                         printf("Removing stale temporary directory %s\n", fullpath);
  37                 if (!show_only) {
  38                         struct strbuf remove_dir_buf = STRBUF_INIT;
  39
  40                         strbuf_addstr(&remove_dir_buf, fullpath);
  41                         remove_dir_recursively(&remove_dir_buf, 0);
  42                         strbuf_release(&remove_dir_buf);
  43                 }
  44         } else {
  45                 if (show_only || verbose)
  46                         printf("Removing stale temporary file %s\n", fullpath);
  47                 if (!show_only)
  48                         unlink_or_warn(fullpath);
  49         }
  50         return 0;
  51 }
  52
  53 static void perform_reachability_traversal(struct rev_info *revs)
  54 {
  55         static int initialized;
  56         struct progress *progress = NULL;
  57
  58         if (initialized)
  59                 return;
  60
  61         if (show_progress)
  62                 progress = start_delayed_progress(_("Checking connectivity"), 0);
  63         mark_reachable_objects(revs, 1, expire, progress);
  64         stop_progress(&progress);
  65         initialized = 1;
  66 }
  67
  68 static int is_object_reachable(const struct object_id *oid,
  69                                struct rev_info *revs)
  70 {
  71         struct object *obj;
  72
  73         perform_reachability_traversal(revs);
  74
  75         obj = lookup_object(the_repository, oid);
  76         return obj && (obj->flags & SEEN);
  77 }
  78
  79 static int prune_object(const struct object_id *oid, const char *fullpath,
  80                         void *data)
  81 {
  82         struct rev_info *revs = data;
  83         struct stat st;
  84
  85         if (is_object_reachable(oid, revs))
  86                 return 0;
  87
  88         if (lstat(fullpath, &st)) {
  89                 /* report errors, but do not stop pruning */
  90                 error("Could not stat '%s'", fullpath);
  91                 return 0;
  92         }
  93         if (st.st_mtime > expire)
  94                 return 0;
  95         if (show_only || verbose) {
  96                 enum object_type type = oid_object_info(the_repository, oid,
  97                                                         NULL);
  98                 printf("%s %s\n", oid_to_hex(oid),
  99                        (type > 0) ? type_name(type) : "unknown");
 100         }
 101         if (!show_only)
 102                 unlink_or_warn(fullpath);
 103         return 0;
 104 }
 105
 106 static int prune_cruft(const char *basename, const char *path,
 107                        void *data UNUSED)
 108 {
 109         if (starts_with(basename, "tmp_obj_"))
 110                 prune_tmp_file(path);
 111         else
 112                 fprintf(stderr, "bad sha1 file: %s\n", path);
 113         return 0;
 114 }
 115
 116 static int prune_subdir(unsigned int nr UNUSED, const char *path,
 117                         void *data UNUSED)
 118 {
 119         if (!show_only)
 120                 rmdir(path);
 121         return 0;
 122 }
 123
 124 /*
 125  * Write errors (particularly out of space) can result in
 126  * failed temporary packs (and more rarely indexes and other
 127  * files beginning with "tmp_") accumulating in the object
 128  * and the pack directories.
 129  */
 130 static void remove_temporary_files(const char *path)
 131 {
 132         DIR *dir;
 133         struct dirent *de;
 134
 135         dir = opendir(path);
 136         if (!dir) {
 137                 if (errno != ENOENT)
 138                         fprintf(stderr, "Unable to open directory %s: %s\n",
 139                                 path, strerror(errno));
 140                 return;
 141         }
 142         while ((de = readdir(dir)) != NULL)
 143                 if (starts_with(de->d_name, "tmp_"))
 144                         prune_tmp_file(mkpath("%s/%s", path, de->d_name));
 145         closedir(dir);
 146 }
 147
 148 int cmd_prune(int argc, const char **argv, const char *prefix)
 149 {
 150         struct rev_info revs;
 151         int exclude_promisor_objects = 0;
 152         const struct option options[] = {
 153                 OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
 154                 OPT__VERBOSE(&verbose, N_("report pruned objects")),
 155                 OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
 156                 OPT_EXPIRY_DATE(0, "expire", &expire,
 157                                 N_("expire objects older than <time>")),
 158                 OPT_BOOL(0, "exclude-promisor-objects", &exclude_promisor_objects,
 159                          N_("limit traversal to objects outside promisor packfiles")),
 160                 OPT_END()
 161         };
 162         char *s;
 163
 164         expire = TIME_MAX;
 165         save_commit_buffer = 0;
 166         read_replace_refs = 0;
 167         repo_init_revisions(the_repository, &revs, prefix);
 168
 169         argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
 170
 171         if (repository_format_precious_objects)
 172                 die(_("cannot prune in a precious-objects repo"));
 173
 174         while (argc--) {
 175                 struct object_id oid;
 176                 const char *name = *argv++;
 177
 178                 if (!repo_get_oid(the_repository, name, &oid)) {
 179                         struct object *object = parse_object_or_die(&oid,
 180                                                                     name);
 181                         add_pending_object(&revs, object, "");
 182                 }
 183                 else
 184                         die("unrecognized argument: %s", name);
 185         }
 186
 187         if (show_progress == -1)
 188                 show_progress = isatty(2);
 189         if (exclude_promisor_objects) {
 190                 fetch_if_missing = 0;
 191                 revs.exclude_promisor_objects = 1;
 192         }
 193
 194         for_each_loose_file_in_objdir(get_object_directory(), prune_object,
 195                                       prune_cruft, prune_subdir, &revs);
 196
 197         prune_packed_objects(show_only ? PRUNE_PACKED_DRY_RUN : 0);
 198         remove_temporary_files(get_object_directory());
 199         s = mkpathdup("%s/pack", get_object_directory());
 200         remove_temporary_files(s);
 201         free(s);
 202
 203         if (is_repository_shallow(the_repository)) {
 204                 perform_reachability_traversal(&revs);
 205                 prune_shallow(show_only ? PRUNE_SHOW_ONLY : 0);
 206         }
 207
 208         release_revisions(&revs);
 209         return 0;
 210 }