builtin/mktag.c

   1 #include "builtin.h"
   2 #include "gettext.h"
   3 #include "hex.h"
   4 #include "parse-options.h"
   5 #include "strbuf.h"
   6 #include "tag.h"
   7 #include "replace-object.h"
   8 #include "object-file.h"
   9 #include "object-store-ll.h"
  10 #include "fsck.h"
  11 #include "config.h"
  12
  13 static char const * const builtin_mktag_usage[] = {
  14         "git mktag",
  15         NULL
  16 };
  17 static int option_strict = 1;
  18
  19 static struct fsck_options fsck_options = FSCK_OPTIONS_STRICT;
  20
  21 static int mktag_fsck_error_func(struct fsck_options *o UNUSED,
  22                                  const struct object_id *oid UNUSED,
  23                                  enum object_type object_type UNUSED,
  24                                  enum fsck_msg_type msg_type,
  25                                  enum fsck_msg_id msg_id UNUSED,
  26                                  const char *message)
  27 {
  28         switch (msg_type) {
  29         case FSCK_WARN:
  30                 if (!option_strict) {
  31                         fprintf_ln(stderr, _("warning: tag input does not pass fsck: %s"), message);
  32                         return 0;
  33
  34                 }
  35                 /* fallthrough */
  36         case FSCK_ERROR:
  37                 /*
  38                  * We treat both warnings and errors as errors, things
  39                  * like missing "tagger" lines are "only" warnings
  40                  * under fsck, we've always considered them an error.
  41                  */
  42                 fprintf_ln(stderr, _("error: tag input does not pass fsck: %s"), message);
  43                 return 1;
  44         default:
  45                 BUG(_("%d (FSCK_IGNORE?) should never trigger this callback"),
  46                     msg_type);
  47         }
  48 }
  49
  50 static int verify_object_in_tag(struct object_id *tagged_oid, int *tagged_type)
  51 {
  52         int ret;
  53         enum object_type type;
  54         unsigned long size;
  55         void *buffer;
  56         const struct object_id *repl;
  57
  58         buffer = repo_read_object_file(the_repository, tagged_oid, &type,
  59                                        &size);
  60         if (!buffer)
  61                 die(_("could not read tagged object '%s'"),
  62                     oid_to_hex(tagged_oid));
  63         if (type != *tagged_type)
  64                 die(_("object '%s' tagged as '%s', but is a '%s' type"),
  65                     oid_to_hex(tagged_oid),
  66                     type_name(*tagged_type), type_name(type));
  67
  68         repl = lookup_replace_object(the_repository, tagged_oid);
  69         ret = check_object_signature(the_repository, repl, buffer, size,
  70                                      *tagged_type);
  71         free(buffer);
  72
  73         return ret;
  74 }
  75
  76 int cmd_mktag(int argc, const char **argv, const char *prefix)
  77 {
  78         static struct option builtin_mktag_options[] = {
  79                 OPT_BOOL(0, "strict", &option_strict,
  80                          N_("enable more strict checking")),
  81                 OPT_END(),
  82         };
  83         struct strbuf buf = STRBUF_INIT;
  84         struct object_id tagged_oid;
  85         int tagged_type;
  86         struct object_id result;
  87
  88         argc = parse_options(argc, argv, prefix,
  89                              builtin_mktag_options,
  90                              builtin_mktag_usage, 0);
  91
  92         if (strbuf_read(&buf, 0, 0) < 0)
  93                 die_errno(_("could not read from stdin"));
  94
  95         fsck_options.error_func = mktag_fsck_error_func;
  96         fsck_set_msg_type_from_ids(&fsck_options, FSCK_MSG_EXTRA_HEADER_ENTRY,
  97                                    FSCK_WARN);
  98         /* config might set fsck.extraHeaderEntry=* again */
  99         git_config(git_fsck_config, &fsck_options);
 100         if (fsck_tag_standalone(NULL, buf.buf, buf.len, &fsck_options,
 101                                 &tagged_oid, &tagged_type))
 102                 die(_("tag on stdin did not pass our strict fsck check"));
 103
 104         if (verify_object_in_tag(&tagged_oid, &tagged_type) < 0)
 105                 die(_("tag on stdin did not refer to a valid object"));
 106
 107         if (write_object_file(buf.buf, buf.len, OBJ_TAG, &result) < 0)
 108                 die(_("unable to write tag file"));
 109
 110         strbuf_release(&buf);
 111         puts(oid_to_hex(&result));
 112         return 0;
 113 }