builtin/prune.c

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