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] [--expire <time>] [--] [<head>...]"),
  12         NULL
  13 };
  14 static int show_only;
  15 static int verbose;
  16 static unsigned long 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 unsigned char *sha1, 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(sha1))
  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 = sha1_object_info(sha1, NULL);
  54                 printf("%s %s\n", sha1_to_hex(sha1),
  55                        (type > 0) ? typename(type) : "unknown");
  56         }
  57         if (!show_only)
  58                 unlink_or_warn(fullpath);
  59         return 0;
  60 }
  61
  62 static int prune_cruft(const char *basename, const char *path, void *data)
  63 {
  64         if (starts_with(basename, "tmp_obj_"))
  65                 prune_tmp_file(path);
  66         else
  67                 fprintf(stderr, "bad sha1 file: %s\n", path);
  68         return 0;
  69 }
  70
  71 static int prune_subdir(int nr, const char *path, void *data)
  72 {
  73         if (!show_only)
  74                 rmdir(path);
  75         return 0;
  76 }
  77
  78 /*
  79  * Write errors (particularly out of space) can result in
  80  * failed temporary packs (and more rarely indexes and other
  81  * files beginning with "tmp_") accumulating in the object
  82  * and the pack directories.
  83  */
  84 static void remove_temporary_files(const char *path)
  85 {
  86         DIR *dir;
  87         struct dirent *de;
  88
  89         dir = opendir(path);
  90         if (!dir) {
  91                 fprintf(stderr, "Unable to open directory %s\n", path);
  92                 return;
  93         }
  94         while ((de = readdir(dir)) != NULL)
  95                 if (starts_with(de->d_name, "tmp_"))
  96                         prune_tmp_file(mkpath("%s/%s", path, de->d_name));
  97         closedir(dir);
  98 }
  99
 100 int cmd_prune(int argc, const char **argv, const char *prefix)
 101 {
 102         struct rev_info revs;
 103         struct progress *progress = NULL;
 104         const struct option options[] = {
 105                 OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
 106                 OPT__VERBOSE(&verbose, N_("report pruned objects")),
 107                 OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
 108                 OPT_EXPIRY_DATE(0, "expire", &expire,
 109                                 N_("expire objects older than <time>")),
 110                 OPT_END()
 111         };
 112         char *s;
 113
 114         expire = ULONG_MAX;
 115         save_commit_buffer = 0;
 116         check_replace_refs = 0;
 117         ref_paranoia = 1;
 118         init_revisions(&revs, prefix);
 119
 120         argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
 121
 122         if (repository_format_precious_objects)
 123                 die(_("cannot prune in a precious-objects repo"));
 124
 125         while (argc--) {
 126                 unsigned char sha1[20];
 127                 const char *name = *argv++;
 128
 129                 if (!get_sha1(name, sha1)) {
 130                         struct object *object = parse_object_or_die(sha1, name);
 131                         add_pending_object(&revs, object, "");
 132                 }
 133                 else
 134                         die("unrecognized argument: %s", name);
 135         }
 136
 137         if (show_progress == -1)
 138                 show_progress = isatty(2);
 139         if (show_progress)
 140                 progress = start_progress_delay(_("Checking connectivity"), 0, 0, 2);
 141
 142         mark_reachable_objects(&revs, 1, expire, progress);
 143         stop_progress(&progress);
 144         for_each_loose_file_in_objdir(get_object_directory(), prune_object,
 145                                       prune_cruft, prune_subdir, NULL);
 146
 147         prune_packed_objects(show_only ? PRUNE_PACKED_DRY_RUN : 0);
 148         remove_temporary_files(get_object_directory());
 149         s = mkpathdup("%s/pack", get_object_directory());
 150         remove_temporary_files(s);
 151         free(s);
 152
 153         if (is_repository_shallow())
 154                 prune_shallow(show_only);
 155
 156         return 0;
 157 }