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_config(const char *var, const char *value, void *cb)
  18 {
  19         return fsck_config_internal(var, value, cb, &fsck_options);
  20 }
  21
  22 static int mktag_fsck_error_func(struct fsck_options *o,
  23                                  const struct object_id *oid,
  24                                  enum object_type object_type,
  25                                  int msg_type, const char *message)
  26 {
  27         switch (msg_type) {
  28         case FSCK_WARN:
  29                 if (!option_strict) {
  30                         fprintf_ln(stderr, _("warning: tag input does not pass fsck: %s"), message);
  31                         return 0;
  32
  33                 }
  34                 /* fallthrough */
  35         case FSCK_ERROR:
  36                 /*
  37                  * We treat both warnings and errors as errors, things
  38                  * like missing "tagger" lines are "only" warnings
  39                  * under fsck, we've always considered them an error.
  40                  */
  41                 fprintf_ln(stderr, _("error: tag input does not pass fsck: %s"), message);
  42                 return 1;
  43         default:
  44                 BUG(_("%d (FSCK_IGNORE?) should never trigger this callback"),
  45                     msg_type);
  46         }
  47 }
  48
  49 static int verify_object_in_tag(struct object_id *tagged_oid, int *tagged_type)
  50 {
  51         int ret;
  52         enum object_type type;
  53         unsigned long size;
  54         void *buffer;
  55         const struct object_id *repl;
  56
  57         buffer = read_object_file(tagged_oid, &type, &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,
  68                                      buffer, size, type_name(*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, NULL,
  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(&fsck_options, "extraheaderentry", "warn");
  95         /* config might set fsck.extraHeaderEntry=* again */
  96         git_config(mktag_config, NULL);
  97         if (fsck_tag_standalone(NULL, buf.buf, buf.len, &fsck_options,
  98                                 &tagged_oid, &tagged_type))
  99                 die(_("tag on stdin did not pass our strict fsck check"));
 100
 101         if (verify_object_in_tag(&tagged_oid, &tagged_type))
 102                 die(_("tag on stdin did not refer to a valid object"));
 103
 104         if (write_object_file(buf.buf, buf.len, tag_type, &result) < 0)
 105                 die(_("unable to write tag file"));
 106
 107         strbuf_release(&buf);
 108         puts(oid_to_hex(&result));
 109         return 0;
 110 }