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(const struct object_id *oid, const char *buf, unsigned long size, 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(lookup_commit(the_repository, oid),
  32                                     &signature_check);
  33        print_signature_buffer(&signature_check, flags);
  34
  35        signature_check_clear(&signature_check);
  36        return ret;
  37}
  38
  39static int verify_commit(const char *name, unsigned flags)
  40{
  41        enum object_type type;
  42        struct object_id oid;
  43        char *buf;
  44        unsigned long size;
  45        int ret;
  46
  47        if (get_oid(name, &oid))
  48                return error("commit '%s' not found.", name);
  49
  50        buf = read_object_file(&oid, &type, &size);
  51        if (!buf)
  52                return error("%s: unable to read file.", name);
  53        if (type != OBJ_COMMIT)
  54                return error("%s: cannot verify a non-commit object of type %s.",
  55                                name, type_name(type));
  56
  57        ret = run_gpg_verify(&oid, buf, size, flags);
  58
  59        free(buf);
  60        return ret;
  61}
  62
  63static int git_verify_commit_config(const char *var, const char *value, void *cb)
  64{
  65        int status = git_gpg_config(var, value, cb);
  66        if (status)
  67                return status;
  68        return git_default_config(var, value, cb);
  69}
  70
  71int cmd_verify_commit(int argc, const char **argv, const char *prefix)
  72{
  73        int i = 1, verbose = 0, had_error = 0;
  74        unsigned flags = 0;
  75        const struct option verify_commit_options[] = {
  76                OPT__VERBOSE(&verbose, N_("print commit contents")),
  77                OPT_BIT(0, "raw", &flags, N_("print raw gpg status output"), GPG_VERIFY_RAW),
  78                OPT_END()
  79        };
  80
  81        git_config(git_verify_commit_config, NULL);
  82
  83        argc = parse_options(argc, argv, prefix, verify_commit_options,
  84                             verify_commit_usage, PARSE_OPT_KEEP_ARGV0);
  85        if (argc <= i)
  86                usage_with_options(verify_commit_usage, verify_commit_options);
  87
  88        if (verbose)
  89                flags |= GPG_VERIFY_VERBOSE;
  90
  91        /* sometimes the program was terminated because this signal
  92         * was received in the process of writing the gpg input: */
  93        signal(SIGPIPE, SIG_IGN);
  94        while (i < argc)
  95                if (verify_commit(argv[i++], flags))
  96                        had_error = 1;
  97        return had_error;
  98}