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