builtin/mktag.c

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