Merge branch 'bc/sha-256-part-2'
[git] / 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
18 static const char * const verify_commit_usage[] = {
19                 N_("git verify-commit [-v | --verbose] <commit>..."),
20                 NULL
21 };
22
23 static int run_gpg_verify(struct commit *commit, 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(commit, &signature_check);
31         print_signature_buffer(&signature_check, flags);
32
33         signature_check_clear(&signature_check);
34         return ret;
35 }
36
37 static int verify_commit(const char *name, unsigned flags)
38 {
39         struct object_id oid;
40         struct object *obj;
41
42         if (get_oid(name, &oid))
43                 return error("commit '%s' not found.", name);
44
45         obj = parse_object(the_repository, &oid);
46         if (!obj)
47                 return error("%s: unable to read file.", name);
48         if (obj->type != OBJ_COMMIT)
49                 return error("%s: cannot verify a non-commit object of type %s.",
50                                 name, type_name(obj->type));
51
52         return run_gpg_verify((struct commit *)obj, flags);
53 }
54
55 static int git_verify_commit_config(const char *var, const char *value, void *cb)
56 {
57         int status = git_gpg_config(var, value, cb);
58         if (status)
59                 return status;
60         return git_default_config(var, value, cb);
61 }
62
63 int cmd_verify_commit(int argc, const char **argv, const char *prefix)
64 {
65         int i = 1, verbose = 0, had_error = 0;
66         unsigned flags = 0;
67         const struct option verify_commit_options[] = {
68                 OPT__VERBOSE(&verbose, N_("print commit contents")),
69                 OPT_BIT(0, "raw", &flags, N_("print raw gpg status output"), GPG_VERIFY_RAW),
70                 OPT_END()
71         };
72
73         git_config(git_verify_commit_config, NULL);
74
75         argc = parse_options(argc, argv, prefix, verify_commit_options,
76                              verify_commit_usage, PARSE_OPT_KEEP_ARGV0);
77         if (argc <= i)
78                 usage_with_options(verify_commit_usage, verify_commit_options);
79
80         if (verbose)
81                 flags |= GPG_VERIFY_VERBOSE;
82
83         /* sometimes the program was terminated because this signal
84          * was received in the process of writing the gpg input: */
85         signal(SIGPIPE, SIG_IGN);
86         while (i < argc)
87                 if (verify_commit(argv[i++], flags))
88                         had_error = 1;
89         return had_error;
90 }