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-file.h"
  15 #include "object-name.h"
  16 #include "object-store.h"
  17 #include "shallow.h"
  18
  19 static const char * const prune_usage[] = {
  20         N_("git prune [-n] [-v] [--progress] [--expire <time>] [--] [<head>...]"),
  21         NULL
  22 };
  23 static int show_only;
  24 static int verbose;
  25 static timestamp_t expire;
  26 static int show_progress = -1;
  27
  28 static int prune_tmp_file(const char *fullpath)
  29 {
  30         struct stat st;
  31         if (lstat(fullpath, &st))
  32                 return error("Could not stat '%s'", fullpath);
  33         if (st.st_mtime > expire)
  34                 return 0;
  35         if (S_ISDIR(st.st_mode)) {
  36                 if (show_only || verbose)
  37                         printf("Removing stale temporary directory %s\n", fullpath);
  38                 if (!show_only) {
  39                         struct strbuf remove_dir_buf = STRBUF_INIT;
  40
  41                         strbuf_addstr(&remove_dir_buf, fullpath);
  42                         remove_dir_recursively(&remove_dir_buf, 0);
  43                         strbuf_release(&remove_dir_buf);
  44                 }
  45         } else {
  46                 if (show_only || verbose)
  47                         printf("Removing stale temporary file %s\n", fullpath);
  48                 if (!show_only)
  49                         unlink_or_warn(fullpath);
  50         }
  51         return 0;
  52 }
  53
  54 static void perform_reachability_traversal(struct rev_info *revs)
  55 {
  56         static int initialized;
  57         struct progress *progress = NULL;
  58
  59         if (initialized)
  60                 return;
  61
  62         if (show_progress)
  63                 progress = start_delayed_progress(_("Checking connectivity"), 0);
  64         mark_reachable_objects(revs, 1, expire, progress);
  65         stop_progress(&progress);
  66         initialized = 1;
  67 }
  68
  69 static int is_object_reachable(const struct object_id *oid,
  70                                struct rev_info *revs)
  71 {
  72         struct object *obj;
  73
  74         perform_reachability_traversal(revs);
  75
  76         obj = lookup_object(the_repository, oid);
  77         return obj && (obj->flags & SEEN);
  78 }
  79
  80 static int prune_object(const struct object_id *oid, const char *fullpath,
  81                         void *data)
  82 {
  83         struct rev_info *revs = data;
  84         struct stat st;
  85
  86         if (is_object_reachable(oid, revs))
  87                 return 0;
  88
  89         if (lstat(fullpath, &st)) {
  90                 /* report errors, but do not stop pruning */
  91                 error("Could not stat '%s'", fullpath);
  92                 return 0;
  93         }
  94         if (st.st_mtime > expire)
  95                 return 0;
  96         if (show_only || verbose) {
  97                 enum object_type type = oid_object_info(the_repository, oid,
  98                                                         NULL);
  99                 printf("%s %s\n", oid_to_hex(oid),
 100                        (type > 0) ? type_name(type) : "unknown");
 101         }
 102         if (!show_only)
 103                 unlink_or_warn(fullpath);
 104         return 0;
 105 }
 106
 107 static int prune_cruft(const char *basename, const char *path,
 108                        void *data UNUSED)
 109 {
 110         if (starts_with(basename, "tmp_obj_"))
 111                 prune_tmp_file(path);
 112         else
 113                 fprintf(stderr, "bad sha1 file: %s\n", path);
 114         return 0;
 115 }
 116
 117 static int prune_subdir(unsigned int nr UNUSED, const char *path,
 118                         void *data UNUSED)
 119 {
 120         if (!show_only)
 121                 rmdir(path);
 122         return 0;
 123 }
 124
 125 /*
 126  * Write errors (particularly out of space) can result in
 127  * failed temporary packs (and more rarely indexes and other
 128  * files beginning with "tmp_") accumulating in the object
 129  * and the pack directories.
 130  */
 131 static void remove_temporary_files(const char *path)
 132 {
 133         DIR *dir;
 134         struct dirent *de;
 135
 136         dir = opendir(path);
 137         if (!dir) {
 138                 if (errno != ENOENT)
 139                         fprintf(stderr, "Unable to open directory %s: %s\n",
 140                                 path, strerror(errno));
 141                 return;
 142         }
 143         while ((de = readdir(dir)) != NULL)
 144                 if (starts_with(de->d_name, "tmp_"))
 145                         prune_tmp_file(mkpath("%s/%s", path, de->d_name));
 146         closedir(dir);
 147 }
 148
 149 int cmd_prune(int argc, const char **argv, const char *prefix)
 150 {
 151         struct rev_info revs;
 152         int exclude_promisor_objects = 0;
 153         const struct option options[] = {
 154                 OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
 155                 OPT__VERBOSE(&verbose, N_("report pruned objects")),
 156                 OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
 157                 OPT_EXPIRY_DATE(0, "expire", &expire,
 158                                 N_("expire objects older than <time>")),
 159                 OPT_BOOL(0, "exclude-promisor-objects", &exclude_promisor_objects,
 160                          N_("limit traversal to objects outside promisor packfiles")),
 161                 OPT_END()
 162         };
 163         char *s;
 164
 165         expire = TIME_MAX;
 166         save_commit_buffer = 0;
 167         disable_replace_refs();
 168         repo_init_revisions(the_repository, &revs, prefix);
 169
 170         argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
 171
 172         if (repository_format_precious_objects)
 173                 die(_("cannot prune in a precious-objects repo"));
 174
 175         while (argc--) {
 176                 struct object_id oid;
 177                 const char *name = *argv++;
 178
 179                 if (!repo_get_oid(the_repository, name, &oid)) {
 180                         struct object *object = parse_object_or_die(&oid,
 181                                                                     name);
 182                         add_pending_object(&revs, object, "");
 183                 }
 184                 else
 185                         die("unrecognized argument: %s", name);
 186         }
 187
 188         if (show_progress == -1)
 189                 show_progress = isatty(2);
 190         if (exclude_promisor_objects) {
 191                 fetch_if_missing = 0;
 192                 revs.exclude_promisor_objects = 1;
 193         }
 194
 195         for_each_loose_file_in_objdir(get_object_directory(), prune_object,
 196                                       prune_cruft, prune_subdir, &revs);
 197
 198         prune_packed_objects(show_only ? PRUNE_PACKED_DRY_RUN : 0);
 199         remove_temporary_files(get_object_directory());
 200         s = mkpathdup("%s/pack", get_object_directory());
 201         remove_temporary_files(s);
 202         free(s);
 203
 204         if (is_repository_shallow(the_repository)) {
 205                 perform_reachability_traversal(&revs);
 206                 prune_shallow(show_only ? PRUNE_SHOW_ONLY : 0);
 207         }
 208
 209         release_revisions(&revs);
 210         return 0;
 211 }