verify-commit: simplify parameters to run_gpg_verify()
[git/git.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 <signal.h>
16 #include "parse-options.h"
17 #include "gpg-interface.h"
18
19 static const char * const verify_commit_usage[] = {
20 N_("git verify-commit [-v | --verbose] <commit>..."),
21 NULL
22 };
23
24 static 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
38 static 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
56 static 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
64 int 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 }