Andrew's git - gitweb.git/blob

e30f7cfbc16c44cd5da8b122c29849a2106d4a2d
   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 "builtin.h"
  10#include "commit.h"
  11#include "run-command.h"
  12#include <signal.h>
  13#include "parse-options.h"
  14#include "gpg-interface.h"
  15
  16static const char * const verify_commit_usage[] = {
  17                N_("git verify-commit [-v | --verbose] <commit>..."),
  18                NULL
  19};
  20
  21static int run_gpg_verify(const unsigned char *sha1, const char *buf, unsigned long size, int verbose)
  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(lookup_commit(sha1), &signature_check);
  29
  30        if (verbose && signature_check.payload)
  31                fputs(signature_check.payload, stdout);
  32
  33        if (signature_check.gpg_output)
  34                fputs(signature_check.gpg_output, stderr);
  35
  36        signature_check_clear(&signature_check);
  37        return ret;
  38}
  39
  40static int verify_commit(const char *name, int verbose)
  41{
  42        enum object_type type;
  43        unsigned char sha1[20];
  44        char *buf;
  45        unsigned long size;
  46        int ret;
  47
  48        if (get_sha1(name, sha1))
  49                return error("commit '%s' not found.", name);
  50
  51        buf = read_sha1_file(sha1, &type, &size);
  52        if (!buf)
  53                return error("%s: unable to read file.", name);
  54        if (type != OBJ_COMMIT)
  55                return error("%s: cannot verify a non-commit object of type %s.",
  56                                name, typename(type));
  57
  58        ret = run_gpg_verify(sha1, buf, size, verbose);
  59
  60        free(buf);
  61        return ret;
  62}
  63
  64static int git_verify_commit_config(const char *var, const char *value, void *cb)
  65{
  66        int status = git_gpg_config(var, value, cb);
  67        if (status)
  68                return status;
  69        return git_default_config(var, value, cb);
  70}
  71
  72int cmd_verify_commit(int argc, const char **argv, const char *prefix)
  73{
  74        int i = 1, verbose = 0, had_error = 0;
  75        const struct option verify_commit_options[] = {
  76                OPT__VERBOSE(&verbose, N_("print commit contents")),
  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        /* sometimes the program was terminated because this signal
  88         * was received in the process of writing the gpg input: */
  89        signal(SIGPIPE, SIG_IGN);
  90        while (i < argc)
  91                if (verify_commit(argv[i++], verbose))
  92                        had_error = 1;
  93        return had_error;
  94}