builtin/prune.c

   1 #include "builtin.h"
   2 #include "commit.h"
   3 #include "diff.h"
   4 #include "dir.h"
   5 #include "environment.h"
   6 #include "gettext.h"
   7 #include "hex.h"
   8 #include "revision.h"
   9 #include "reachable.h"
  10 #include "parse-options.h"
  11 #include "path.h"
  12 #include "progress.h"
  13 #include "prune-packed.h"
  14 #include "replace-object.h"
  15 #include "object-file.h"
  16 #include "object-name.h"
  17 #include "object-store-ll.h"
  18 #include "shallow.h"
  19
  20 static const char * const prune_usage[] = {
  21         N_("git prune [-n] [-v] [--progress] [--expire <time>] [--] [<head>...]"),
  22         NULL
  23 };
  24 static int show_only;
  25 static int verbose;
  26 static timestamp_t expire;
  27 static int show_progress = -1;
  28
  29 static int prune_tmp_file(const char *fullpath)
  30 {
  31         struct stat st;
  32         if (lstat(fullpath, &st))
  33                 return error("Could not stat '%s'", fullpath);
  34         if (st.st_mtime > expire)
  35                 return 0;
  36         if (S_ISDIR(st.st_mode)) {
  37                 if (show_only || verbose)
  38                         printf("Removing stale temporary directory %s\n", fullpath);
  39                 if (!show_only) {
  40                         struct strbuf remove_dir_buf = STRBUF_INIT;
  41
  42                         strbuf_addstr(&remove_dir_buf, fullpath);
  43                         remove_dir_recursively(&remove_dir_buf, 0);
  44                         strbuf_release(&remove_dir_buf);
  45                 }
  46         } else {
  47                 if (show_only || verbose)
  48                         printf("Removing stale temporary file %s\n", fullpath);
  49                 if (!show_only)
  50                         unlink_or_warn(fullpath);
  51         }
  52         return 0;
  53 }
  54
  55 static void perform_reachability_traversal(struct rev_info *revs)
  56 {
  57         static int initialized;
  58         struct progress *progress = NULL;
  59
  60         if (initialized)
  61                 return;
  62
  63         if (show_progress)
  64                 progress = start_delayed_progress(_("Checking connectivity"), 0);
  65         mark_reachable_objects(revs, 1, expire, progress);
  66         stop_progress(&progress);
  67         initialized = 1;
  68 }
  69
  70 static int is_object_reachable(const struct object_id *oid,
  71                                struct rev_info *revs)
  72 {
  73         struct object *obj;
  74
  75         perform_reachability_traversal(revs);
  76
  77         obj = lookup_object(the_repository, oid);
  78         return obj && (obj->flags & SEEN);
  79 }
  80
  81 static int prune_object(const struct object_id *oid, const char *fullpath,
  82                         void *data)
  83 {
  84         struct rev_info *revs = data;
  85         struct stat st;
  86
  87         if (is_object_reachable(oid, revs))
  88                 return 0;
  89
  90         if (lstat(fullpath, &st)) {
  91                 /* report errors, but do not stop pruning */
  92                 error("Could not stat '%s'", fullpath);
  93                 return 0;
  94         }
  95         if (st.st_mtime > expire)
  96                 return 0;
  97         if (show_only || verbose) {
  98                 enum object_type type = oid_object_info(the_repository, oid,
  99                                                         NULL);
 100                 printf("%s %s\n", oid_to_hex(oid),
 101                        (type > 0) ? type_name(type) : "unknown");
 102         }
 103         if (!show_only)
 104                 unlink_or_warn(fullpath);
 105         return 0;
 106 }
 107
 108 static int prune_cruft(const char *basename, const char *path,
 109                        void *data UNUSED)
 110 {
 111         if (starts_with(basename, "tmp_obj_"))
 112                 prune_tmp_file(path);
 113         else
 114                 fprintf(stderr, "bad sha1 file: %s\n", path);
 115         return 0;
 116 }
 117
 118 static int prune_subdir(unsigned int nr UNUSED, const char *path,
 119                         void *data UNUSED)
 120 {
 121         if (!show_only)
 122                 rmdir(path);
 123         return 0;
 124 }
 125
 126 /*
 127  * Write errors (particularly out of space) can result in
 128  * failed temporary packs (and more rarely indexes and other
 129  * files beginning with "tmp_") accumulating in the object
 130  * and the pack directories.
 131  */
 132 static void remove_temporary_files(const char *path)
 133 {
 134         DIR *dir;
 135         struct dirent *de;
 136
 137         dir = opendir(path);
 138         if (!dir) {
 139                 if (errno != ENOENT)
 140                         fprintf(stderr, "Unable to open directory %s: %s\n",
 141                                 path, strerror(errno));
 142                 return;
 143         }
 144         while ((de = readdir(dir)) != NULL)
 145                 if (starts_with(de->d_name, "tmp_"))
 146                         prune_tmp_file(mkpath("%s/%s", path, de->d_name));
 147         closedir(dir);
 148 }
 149
 150 int cmd_prune(int argc, const char **argv, const char *prefix)
 151 {
 152         struct rev_info revs;
 153         int exclude_promisor_objects = 0;
 154         const struct option options[] = {
 155                 OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
 156                 OPT__VERBOSE(&verbose, N_("report pruned objects")),
 157                 OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
 158                 OPT_EXPIRY_DATE(0, "expire", &expire,
 159                                 N_("expire objects older than <time>")),
 160                 OPT_BOOL(0, "exclude-promisor-objects", &exclude_promisor_objects,
 161                          N_("limit traversal to objects outside promisor packfiles")),
 162                 OPT_END()
 163         };
 164         char *s;
 165
 166         expire = TIME_MAX;
 167         save_commit_buffer = 0;
 168         disable_replace_refs();
 169         repo_init_revisions(the_repository, &revs, prefix);
 170
 171         argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
 172
 173         if (repository_format_precious_objects)
 174                 die(_("cannot prune in a precious-objects repo"));
 175
 176         while (argc--) {
 177                 struct object_id oid;
 178                 const char *name = *argv++;
 179
 180                 if (!repo_get_oid(the_repository, name, &oid)) {
 181                         struct object *object = parse_object_or_die(&oid,
 182                                                                     name);
 183                         add_pending_object(&revs, object, "");
 184                 }
 185                 else
 186                         die("unrecognized argument: %s", name);
 187         }
 188
 189         if (show_progress == -1)
 190                 show_progress = isatty(2);
 191         if (exclude_promisor_objects) {
 192                 fetch_if_missing = 0;
 193                 revs.exclude_promisor_objects = 1;
 194         }
 195
 196         for_each_loose_file_in_objdir(get_object_directory(), prune_object,
 197                                       prune_cruft, prune_subdir, &revs);
 198
 199         prune_packed_objects(show_only ? PRUNE_PACKED_DRY_RUN : 0);
 200         remove_temporary_files(get_object_directory());
 201         s = mkpathdup("%s/pack", get_object_directory());
 202         remove_temporary_files(s);
 203         free(s);
 204
 205         if (is_repository_shallow(the_repository)) {
 206                 perform_reachability_traversal(&revs);
 207                 prune_shallow(show_only ? PRUNE_SHOW_ONLY : 0);
 208         }
 209
 210         release_revisions(&revs);
 211         return 0;
 212 }