Andrew's git - gitweb.git/blob - 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
  19static const char * const verify_commit_usage[] = {
  20                N_("git verify-commit [-v | --verbose] <commit>..."),
  21                NULL
  22};
  23
  24static 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
  38static 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
  56static 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
  64int 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}