Merge branch 'sg/core-filemode-doc-typofix'
[git.git] / builtin / verify-commit.c
blob05b734e6d1bd469b63aa7b51921622a590730b6d
1 /*
2 * Builtin "git commit-commit"
4 * Copyright (c) 2014 Michael J Gruber <git@drmicha.warpmail.net>
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"
16 static const char * const verify_commit_usage[] = {
17 N_("git verify-commit [-v | --verbose] <commit>..."),
18 NULL
21 static int run_gpg_verify(const struct object_id *oid, const char *buf, unsigned long size, unsigned flags)
23 struct signature_check signature_check;
24 int ret;
26 memset(&signature_check, 0, sizeof(signature_check));
28 ret = check_commit_signature(lookup_commit(oid), &signature_check);
29 print_signature_buffer(&signature_check, flags);
31 signature_check_clear(&signature_check);
32 return ret;
35 static int verify_commit(const char *name, unsigned flags)
37 enum object_type type;
38 struct object_id oid;
39 char *buf;
40 unsigned long size;
41 int ret;
43 if (get_oid(name, &oid))
44 return error("commit '%s' not found.", name);
46 buf = read_sha1_file(oid.hash, &type, &size);
47 if (!buf)
48 return error("%s: unable to read file.", name);
49 if (type != OBJ_COMMIT)
50 return error("%s: cannot verify a non-commit object of type %s.",
51 name, typename(type));
53 ret = run_gpg_verify(&oid, buf, size, flags);
55 free(buf);
56 return ret;
59 static int git_verify_commit_config(const char *var, const char *value, void *cb)
61 int status = git_gpg_config(var, value, cb);
62 if (status)
63 return status;
64 return git_default_config(var, value, cb);
67 int cmd_verify_commit(int argc, const char **argv, const char *prefix)
69 int i = 1, verbose = 0, had_error = 0;
70 unsigned flags = 0;
71 const struct option verify_commit_options[] = {
72 OPT__VERBOSE(&verbose, N_("print commit contents")),
73 OPT_BIT(0, "raw", &flags, N_("print raw gpg status output"), GPG_VERIFY_RAW),
74 OPT_END()
77 git_config(git_verify_commit_config, NULL);
79 argc = parse_options(argc, argv, prefix, verify_commit_options,
80 verify_commit_usage, PARSE_OPT_KEEP_ARGV0);
81 if (argc <= i)
82 usage_with_options(verify_commit_usage, verify_commit_options);
84 if (verbose)
85 flags |= GPG_VERIFY_VERBOSE;
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++], flags))
92 had_error = 1;
93 return had_error;