builtin/verify-commit.c

   1 /*
   2  * Builtin "git commit-commit"
   3  *
   4  * Copyright (c) 2014 Michael J Gruber <git@drmicha.warpmail.net>
   5  *
   6  * Based on git-verify-tag
   7  */
   8 #include "builtin.h"
   9 #include "config.h"
  10 #include "gettext.h"
  11 #include "object-name.h"
  12 #include "repository.h"
  13 #include "commit.h"
  14 #include "parse-options.h"
  15 #include "gpg-interface.h"
  16
  17 static const char * const verify_commit_usage[] = {
  18                 N_("git verify-commit [-v | --verbose] [--raw] <commit>..."),
  19                 NULL
  20 };
  21
  22 static int run_gpg_verify(struct commit *commit, unsigned flags)
  23 {
  24         struct signature_check signature_check;
  25         int ret;
  26
  27         memset(&signature_check, 0, sizeof(signature_check));
  28
  29         ret = check_commit_signature(commit, &signature_check);
  30         print_signature_buffer(&signature_check, flags);
  31
  32         signature_check_clear(&signature_check);
  33         return ret;
  34 }
  35
  36 static int verify_commit(const char *name, unsigned flags)
  37 {
  38         struct object_id oid;
  39         struct object *obj;
  40
  41         if (repo_get_oid(the_repository, name, &oid))
  42                 return error("commit '%s' not found.", name);
  43
  44         obj = parse_object(the_repository, &oid);
  45         if (!obj)
  46                 return error("%s: unable to read file.", name);
  47         if (obj->type != OBJ_COMMIT)
  48                 return error("%s: cannot verify a non-commit object of type %s.",
  49                                 name, type_name(obj->type));
  50
  51         return run_gpg_verify((struct commit *)obj, flags);
  52 }
  53
  54 int cmd_verify_commit(int argc, const char **argv, const char *prefix)
  55 {
  56         int i = 1, verbose = 0, had_error = 0;
  57         unsigned flags = 0;
  58         const struct option verify_commit_options[] = {
  59                 OPT__VERBOSE(&verbose, N_("print commit contents")),
  60                 OPT_BIT(0, "raw", &flags, N_("print raw gpg status output"), GPG_VERIFY_RAW),
  61                 OPT_END()
  62         };
  63
  64         git_config(git_default_config, NULL);
  65
  66         argc = parse_options(argc, argv, prefix, verify_commit_options,
  67                              verify_commit_usage, PARSE_OPT_KEEP_ARGV0);
  68         if (argc <= i)
  69                 usage_with_options(verify_commit_usage, verify_commit_options);
  70
  71         if (verbose)
  72                 flags |= GPG_VERIFY_VERBOSE;
  73
  74         /* sometimes the program was terminated because this signal
  75          * was received in the process of writing the gpg input: */
  76         signal(SIGPIPE, SIG_IGN);
  77         while (i < argc)
  78                 if (verify_commit(argv[i++], flags))
  79                         had_error = 1;
  80         return had_error;
  81 }