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