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