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 "dir.h"
  10
  11 static const char * const prune_usage[] = {
  12         N_("git prune [-n] [-v] [--expire <time>] [--] [<head>...]"),
  13         NULL
  14 };
  15 static int show_only;
  16 static int verbose;
  17 static unsigned long 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 unsigned char *sha1, 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(sha1))
  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 = sha1_object_info(sha1, NULL);
  55                 printf("%s %s\n", sha1_to_hex(sha1),
  56                        (type > 0) ? typename(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(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         const struct option options[] = {
 106                 OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
 107                 OPT__VERBOSE(&verbose, N_("report pruned objects")),
 108                 OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
 109                 OPT_EXPIRY_DATE(0, "expire", &expire,
 110                                 N_("expire objects older than <time>")),
 111                 OPT_END()
 112         };
 113         char *s;
 114
 115         expire = ULONG_MAX;
 116         save_commit_buffer = 0;
 117         check_replace_refs = 0;
 118         init_revisions(&revs, prefix);
 119
 120         argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
 121         while (argc--) {
 122                 unsigned char sha1[20];
 123                 const char *name = *argv++;
 124
 125                 if (!get_sha1(name, sha1)) {
 126                         struct object *object = parse_object_or_die(sha1, name);
 127                         add_pending_object(&revs, object, "");
 128                 }
 129                 else
 130                         die("unrecognized argument: %s", name);
 131         }
 132
 133         if (show_progress == -1)
 134                 show_progress = isatty(2);
 135         if (show_progress)
 136                 progress = start_progress_delay(_("Checking connectivity"), 0, 0, 2);
 137
 138         mark_reachable_objects(&revs, 1, expire, progress);
 139         stop_progress(&progress);
 140         for_each_loose_file_in_objdir(get_object_directory(), prune_object,
 141                                       prune_cruft, prune_subdir, NULL);
 142
 143         prune_packed_objects(show_only ? PRUNE_PACKED_DRY_RUN : 0);
 144         remove_temporary_files(get_object_directory());
 145         s = mkpathdup("%s/pack", get_object_directory());
 146         remove_temporary_files(s);
 147         free(s);
 148
 149         if (is_repository_shallow())
 150                 prune_shallow(show_only);
 151
 152         return 0;
 153 }