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