builtin/mktag.c

   1 #include "builtin.h"
   2 #include "gettext.h"
   3 #include "hex.h"
   4 #include "parse-options.h"
   5 #include "tag.h"
   6 #include "replace-object.h"
   7 #include "object-store.h"
   8 #include "fsck.h"
   9 #include "config.h"
  10
  11 static char const * const builtin_mktag_usage[] = {
  12         "git mktag",
  13         NULL
  14 };
  15 static int option_strict = 1;
  16
  17 static struct fsck_options fsck_options = FSCK_OPTIONS_STRICT;
  18
  19 static int mktag_fsck_error_func(struct fsck_options *o,
  20                                  const struct object_id *oid,
  21                                  enum object_type object_type,
  22                                  enum fsck_msg_type msg_type,
  23                                  enum fsck_msg_id msg_id,
  24                                  const char *message)
  25 {
  26         switch (msg_type) {
  27         case FSCK_WARN:
  28                 if (!option_strict) {
  29                         fprintf_ln(stderr, _("warning: tag input does not pass fsck: %s"), message);
  30                         return 0;
  31
  32                 }
  33                 /* fallthrough */
  34         case FSCK_ERROR:
  35                 /*
  36                  * We treat both warnings and errors as errors, things
  37                  * like missing "tagger" lines are "only" warnings
  38                  * under fsck, we've always considered them an error.
  39                  */
  40                 fprintf_ln(stderr, _("error: tag input does not pass fsck: %s"), message);
  41                 return 1;
  42         default:
  43                 BUG(_("%d (FSCK_IGNORE?) should never trigger this callback"),
  44                     msg_type);
  45         }
  46 }
  47
  48 static int verify_object_in_tag(struct object_id *tagged_oid, int *tagged_type)
  49 {
  50         int ret;
  51         enum object_type type;
  52         unsigned long size;
  53         void *buffer;
  54         const struct object_id *repl;
  55
  56         buffer = repo_read_object_file(the_repository, tagged_oid, &type,
  57                                        &size);
  58         if (!buffer)
  59                 die(_("could not read tagged object '%s'"),
  60                     oid_to_hex(tagged_oid));
  61         if (type != *tagged_type)
  62                 die(_("object '%s' tagged as '%s', but is a '%s' type"),
  63                     oid_to_hex(tagged_oid),
  64                     type_name(*tagged_type), type_name(type));
  65
  66         repl = lookup_replace_object(the_repository, tagged_oid);
  67         ret = check_object_signature(the_repository, repl, buffer, size,
  68                                      *tagged_type);
  69         free(buffer);
  70
  71         return ret;
  72 }
  73
  74 int cmd_mktag(int argc, const char **argv, const char *prefix)
  75 {
  76         static struct option builtin_mktag_options[] = {
  77                 OPT_BOOL(0, "strict", &option_strict,
  78                          N_("enable more strict checking")),
  79                 OPT_END(),
  80         };
  81         struct strbuf buf = STRBUF_INIT;
  82         struct object_id tagged_oid;
  83         int tagged_type;
  84         struct object_id result;
  85
  86         argc = parse_options(argc, argv, prefix,
  87                              builtin_mktag_options,
  88                              builtin_mktag_usage, 0);
  89
  90         if (strbuf_read(&buf, 0, 0) < 0)
  91                 die_errno(_("could not read from stdin"));
  92
  93         fsck_options.error_func = mktag_fsck_error_func;
  94         fsck_set_msg_type_from_ids(&fsck_options, FSCK_MSG_EXTRA_HEADER_ENTRY,
  95                                    FSCK_WARN);
  96         /* config might set fsck.extraHeaderEntry=* again */
  97         git_config(git_fsck_config, &fsck_options);
  98         if (fsck_tag_standalone(NULL, buf.buf, buf.len, &fsck_options,
  99                                 &tagged_oid, &tagged_type))
 100                 die(_("tag on stdin did not pass our strict fsck check"));
 101
 102         if (verify_object_in_tag(&tagged_oid, &tagged_type) < 0)
 103                 die(_("tag on stdin did not refer to a valid object"));
 104
 105         if (write_object_file(buf.buf, buf.len, OBJ_TAG, &result) < 0)
 106                 die(_("unable to write tag file"));
 107
 108         strbuf_release(&buf);
 109         puts(oid_to_hex(&result));
 110         return 0;
 111 }