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 "object-store.h"
  12 #include "repository.h"
  13 #include "commit.h"
  14 #include "run-command.h"
  15 #include <signal.h>
  16 #include "parse-options.h"
  17 #include "gpg-interface.h"
  18
  19 static const char * const verify_commit_usage[] = {
  20                 N_("git verify-commit [-v | --verbose] <commit>..."),
  21                 NULL
  22 };
  23
  24 static int run_gpg_verify(struct commit *commit, unsigned flags)
  25 {
  26         struct signature_check signature_check;
  27         int ret;
  28
  29         memset(&signature_check, 0, sizeof(signature_check));
  30
  31         ret = check_commit_signature(commit, &signature_check);
  32         print_signature_buffer(&signature_check, flags);
  33
  34         signature_check_clear(&signature_check);
  35         return ret;
  36 }
  37
  38 static int verify_commit(const char *name, unsigned flags)
  39 {
  40         struct object_id oid;
  41         struct object *obj;
  42
  43         if (get_oid(name, &oid))
  44                 return error("commit '%s' not found.", name);
  45
  46         obj = parse_object(the_repository, &oid);
  47         if (!obj)
  48                 return error("%s: unable to read file.", name);
  49         if (obj->type != OBJ_COMMIT)
  50                 return error("%s: cannot verify a non-commit object of type %s.",
  51                                 name, type_name(obj->type));
  52
  53         return run_gpg_verify((struct commit *)obj, flags);
  54 }
  55
  56 static int git_verify_commit_config(const char *var, const char *value, void *cb)
  57 {
  58         int status = git_gpg_config(var, value, cb);
  59         if (status)
  60                 return status;
  61         return git_default_config(var, value, cb);
  62 }
  63
  64 int cmd_verify_commit(int argc, const char **argv, const char *prefix)
  65 {
  66         int i = 1, verbose = 0, had_error = 0;
  67         unsigned flags = 0;
  68         const struct option verify_commit_options[] = {
  69                 OPT__VERBOSE(&verbose, N_("print commit contents")),
  70                 OPT_BIT(0, "raw", &flags, N_("print raw gpg status output"), GPG_VERIFY_RAW),
  71                 OPT_END()
  72         };
  73
  74         git_config(git_verify_commit_config, NULL);
  75
  76         argc = parse_options(argc, argv, prefix, verify_commit_options,
  77                              verify_commit_usage, PARSE_OPT_KEEP_ARGV0);
  78         if (argc <= i)
  79                 usage_with_options(verify_commit_usage, verify_commit_options);
  80
  81         if (verbose)
  82                 flags |= GPG_VERIFY_VERBOSE;
  83
  84         /* sometimes the program was terminated because this signal
  85          * was received in the process of writing the gpg input: */
  86         signal(SIGPIPE, SIG_IGN);
  87         while (i < argc)
  88                 if (verify_commit(argv[i++], flags))
  89                         had_error = 1;
  90         return had_error;
  91 }