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 "cache.h"
   9 #include "config.h"
  10 #include "builtin.h"
  11 #include "gettext.h"
  12 #include "object-name.h"
  13 #include "object-store.h"
  14 #include "repository.h"
  15 #include "commit.h"
  16 #include "run-command.h"
  17 #include "parse-options.h"
  18 #include "gpg-interface.h"
  19
  20 static const char * const verify_commit_usage[] = {
  21                 N_("git verify-commit [-v | --verbose] [--raw] <commit>..."),
  22                 NULL
  23 };
  24
  25 static int run_gpg_verify(struct commit *commit, unsigned flags)
  26 {
  27         struct signature_check signature_check;
  28         int ret;
  29
  30         memset(&signature_check, 0, sizeof(signature_check));
  31
  32         ret = check_commit_signature(commit, &signature_check);
  33         print_signature_buffer(&signature_check, flags);
  34
  35         signature_check_clear(&signature_check);
  36         return ret;
  37 }
  38
  39 static int verify_commit(const char *name, unsigned flags)
  40 {
  41         struct object_id oid;
  42         struct object *obj;
  43
  44         if (repo_get_oid(the_repository, name, &oid))
  45                 return error("commit '%s' not found.", name);
  46
  47         obj = parse_object(the_repository, &oid);
  48         if (!obj)
  49                 return error("%s: unable to read file.", name);
  50         if (obj->type != OBJ_COMMIT)
  51                 return error("%s: cannot verify a non-commit object of type %s.",
  52                                 name, type_name(obj->type));
  53
  54         return run_gpg_verify((struct commit *)obj, flags);
  55 }
  56
  57 int cmd_verify_commit(int argc, const char **argv, const char *prefix)
  58 {
  59         int i = 1, verbose = 0, had_error = 0;
  60         unsigned flags = 0;
  61         const struct option verify_commit_options[] = {
  62                 OPT__VERBOSE(&verbose, N_("print commit contents")),
  63                 OPT_BIT(0, "raw", &flags, N_("print raw gpg status output"), GPG_VERIFY_RAW),
  64                 OPT_END()
  65         };
  66
  67         git_config(git_default_config, NULL);
  68
  69         argc = parse_options(argc, argv, prefix, verify_commit_options,
  70                              verify_commit_usage, PARSE_OPT_KEEP_ARGV0);
  71         if (argc <= i)
  72                 usage_with_options(verify_commit_usage, verify_commit_options);
  73
  74         if (verbose)
  75                 flags |= GPG_VERIFY_VERBOSE;
  76
  77         /* sometimes the program was terminated because this signal
  78          * was received in the process of writing the gpg input: */
  79         signal(SIGPIPE, SIG_IGN);
  80         while (i < argc)
  81                 if (verify_commit(argv[i++], flags))
  82                         had_error = 1;
  83         return had_error;
  84 }