builtin/prune.c

   1 #define USE_THE_REPOSITORY_VARIABLE
   2 #include "builtin.h"
   3 #include "commit.h"
   4 #include "diff.h"
   5 #include "dir.h"
   6 #include "environment.h"
   7 #include "gettext.h"
   8 #include "hex.h"
   9 #include "revision.h"
  10 #include "reachable.h"
  11 #include "parse-options.h"
  12 #include "path.h"
  13 #include "progress.h"
  14 #include "prune-packed.h"
  15 #include "replace-object.h"
  16 #include "object-file.h"
  17 #include "object-name.h"
  18 #include "object-store-ll.h"
  19 #include "shallow.h"
  20
  21 static const char * const prune_usage[] = {
  22         N_("git prune [-n] [-v] [--progress] [--expire <time>] [--] [<head>...]"),
  23         NULL
  24 };
  25 static int show_only;
  26 static int verbose;
  27 static timestamp_t expire;
  28 static int show_progress = -1;
  29
  30 static int prune_tmp_file(const char *fullpath)
  31 {
  32         struct stat st;
  33         if (lstat(fullpath, &st))
  34                 return error("Could not stat '%s'", fullpath);
  35         if (st.st_mtime > expire)
  36                 return 0;
  37         if (S_ISDIR(st.st_mode)) {
  38                 if (show_only || verbose)
  39                         printf("Removing stale temporary directory %s\n", fullpath);
  40                 if (!show_only) {
  41                         struct strbuf remove_dir_buf = STRBUF_INIT;
  42
  43                         strbuf_addstr(&remove_dir_buf, fullpath);
  44                         remove_dir_recursively(&remove_dir_buf, 0);
  45                         strbuf_release(&remove_dir_buf);
  46                 }
  47         } else {
  48                 if (show_only || verbose)
  49                         printf("Removing stale temporary file %s\n", fullpath);
  50                 if (!show_only)
  51                         unlink_or_warn(fullpath);
  52         }
  53         return 0;
  54 }
  55
  56 static void perform_reachability_traversal(struct rev_info *revs)
  57 {
  58         static int initialized;
  59         struct progress *progress = NULL;
  60
  61         if (initialized)
  62                 return;
  63
  64         if (show_progress)
  65                 progress = start_delayed_progress(_("Checking connectivity"), 0);
  66         mark_reachable_objects(revs, 1, expire, progress);
  67         stop_progress(&progress);
  68         initialized = 1;
  69 }
  70
  71 static int is_object_reachable(const struct object_id *oid,
  72                                struct rev_info *revs)
  73 {
  74         struct object *obj;
  75
  76         perform_reachability_traversal(revs);
  77
  78         obj = lookup_object(the_repository, oid);
  79         return obj && (obj->flags & SEEN);
  80 }
  81
  82 static int prune_object(const struct object_id *oid, const char *fullpath,
  83                         void *data)
  84 {
  85         struct rev_info *revs = data;
  86         struct stat st;
  87
  88         if (is_object_reachable(oid, revs))
  89                 return 0;
  90
  91         if (lstat(fullpath, &st)) {
  92                 /* report errors, but do not stop pruning */
  93                 error("Could not stat '%s'", fullpath);
  94                 return 0;
  95         }
  96         if (st.st_mtime > expire)
  97                 return 0;
  98         if (show_only || verbose) {
  99                 enum object_type type = oid_object_info(the_repository, oid,
 100                                                         NULL);
 101                 printf("%s %s\n", oid_to_hex(oid),
 102                        (type > 0) ? type_name(type) : "unknown");
 103         }
 104         if (!show_only)
 105                 unlink_or_warn(fullpath);
 106         return 0;
 107 }
 108
 109 static int prune_cruft(const char *basename, const char *path,
 110                        void *data UNUSED)
 111 {
 112         if (starts_with(basename, "tmp_obj_"))
 113                 prune_tmp_file(path);
 114         else
 115                 fprintf(stderr, "bad sha1 file: %s\n", path);
 116         return 0;
 117 }
 118
 119 static int prune_subdir(unsigned int nr UNUSED, const char *path,
 120                         void *data UNUSED)
 121 {
 122         if (!show_only)
 123                 rmdir(path);
 124         return 0;
 125 }
 126
 127 /*
 128  * Write errors (particularly out of space) can result in
 129  * failed temporary packs (and more rarely indexes and other
 130  * files beginning with "tmp_") accumulating in the object
 131  * and the pack directories.
 132  */
 133 static void remove_temporary_files(const char *path)
 134 {
 135         DIR *dir;
 136         struct dirent *de;
 137
 138         dir = opendir(path);
 139         if (!dir) {
 140                 if (errno != ENOENT)
 141                         fprintf(stderr, "Unable to open directory %s: %s\n",
 142                                 path, strerror(errno));
 143                 return;
 144         }
 145         while ((de = readdir(dir)) != NULL)
 146                 if (starts_with(de->d_name, "tmp_"))
 147                         prune_tmp_file(mkpath("%s/%s", path, de->d_name));
 148         closedir(dir);
 149 }
 150
 151 int cmd_prune(int argc,
 152               const char **argv,
 153               const char *prefix,
 154               struct repository *repo UNUSED)
 155 {
 156         struct rev_info revs;
 157         int exclude_promisor_objects = 0;
 158         const struct option options[] = {
 159                 OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
 160                 OPT__VERBOSE(&verbose, N_("report pruned objects")),
 161                 OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
 162                 OPT_EXPIRY_DATE(0, "expire", &expire,
 163                                 N_("expire objects older than <time>")),
 164                 OPT_BOOL(0, "exclude-promisor-objects", &exclude_promisor_objects,
 165                          N_("limit traversal to objects outside promisor packfiles")),
 166                 OPT_END()
 167         };
 168         char *s;
 169
 170         expire = TIME_MAX;
 171         save_commit_buffer = 0;
 172         disable_replace_refs();
 173         repo_init_revisions(the_repository, &revs, prefix);
 174
 175         argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
 176
 177         if (repository_format_precious_objects)
 178                 die(_("cannot prune in a precious-objects repo"));
 179
 180         while (argc--) {
 181                 struct object_id oid;
 182                 const char *name = *argv++;
 183
 184                 if (!repo_get_oid(the_repository, name, &oid)) {
 185                         struct object *object = parse_object_or_die(&oid,
 186                                                                     name);
 187                         add_pending_object(&revs, object, "");
 188                 }
 189                 else
 190                         die("unrecognized argument: %s", name);
 191         }
 192
 193         if (show_progress == -1)
 194                 show_progress = isatty(2);
 195         if (exclude_promisor_objects) {
 196                 fetch_if_missing = 0;
 197                 revs.exclude_promisor_objects = 1;
 198         }
 199
 200         for_each_loose_file_in_objdir(repo_get_object_directory(the_repository),
 201                                       prune_object, prune_cruft, prune_subdir, &revs);
 202
 203         prune_packed_objects(show_only ? PRUNE_PACKED_DRY_RUN : 0);
 204         remove_temporary_files(repo_get_object_directory(the_repository));
 205         s = mkpathdup("%s/pack", repo_get_object_directory(the_repository));
 206         remove_temporary_files(s);
 207         free(s);
 208
 209         if (is_repository_shallow(the_repository)) {
 210                 perform_reachability_traversal(&revs);
 211                 prune_shallow(show_only ? PRUNE_SHOW_ONLY : 0);
 212         }
 213
 214         release_revisions(&revs);
 215         return 0;
 216 }