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 "parse-options.h"
  16#include "gpg-interface.h"
  17
  18static const char * const verify_commit_usage[] = {
  19                N_("git verify-commit [-v | --verbose] <commit>..."),
  20                NULL
  21};
  22
  23static int run_gpg_verify(const struct object_id *oid, const char *buf, unsigned long size, unsigned flags)
  24{
  25        struct signature_check signature_check;
  26        int ret;
  27
  28        memset(&signature_check, 0, sizeof(signature_check));
  29
  30        ret = check_commit_signature(lookup_commit(the_repository, oid),
  31                                     &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        enum object_type type;
  41        struct object_id oid;
  42        char *buf;
  43        unsigned long size;
  44        int ret;
  45
  46        if (get_oid(name, &oid))
  47                return error("commit '%s' not found.", name);
  48
  49        buf = read_object_file(&oid, &type, &size);
  50        if (!buf)
  51                return error("%s: unable to read file.", name);
  52        if (type != OBJ_COMMIT)
  53                return error("%s: cannot verify a non-commit object of type %s.",
  54                                name, type_name(type));
  55
  56        ret = run_gpg_verify(&oid, buf, size, flags);
  57
  58        free(buf);
  59        return ret;
  60}
  61
  62static int git_verify_commit_config(const char *var, const char *value, void *cb)
  63{
  64        int status = git_gpg_config(var, value, cb);
  65        if (status)
  66                return status;
  67        return git_default_config(var, value, cb);
  68}
  69
  70int cmd_verify_commit(int argc, const char **argv, const char *prefix)
  71{
  72        int i = 1, verbose = 0, had_error = 0;
  73        unsigned flags = 0;
  74        const struct option verify_commit_options[] = {
  75                OPT__VERBOSE(&verbose, N_("print commit contents")),
  76                OPT_BIT(0, "raw", &flags, N_("print raw gpg status output"), GPG_VERIFY_RAW),
  77                OPT_END()
  78        };
  79
  80        git_config(git_verify_commit_config, NULL);
  81
  82        argc = parse_options(argc, argv, prefix, verify_commit_options,
  83                             verify_commit_usage, PARSE_OPT_KEEP_ARGV0);
  84        if (argc <= i)
  85                usage_with_options(verify_commit_usage, verify_commit_options);
  86
  87        if (verbose)
  88                flags |= GPG_VERIFY_VERBOSE;
  89
  90        /* sometimes the program was terminated because this signal
  91         * was received in the process of writing the gpg input: */
  92        signal(SIGPIPE, SIG_IGN);
  93        while (i < argc)
  94                if (verify_commit(argv[i++], flags))
  95                        had_error = 1;
  96        return had_error;
  97}