1 files changed, 90 insertions, 0 deletions
diff --git a/third_party/git/builtin/verify-commit.c b/third_party/git/builtin/verify-commit.c
new file mode 100644
index 000000000000..40c69a0bedde
--- /dev/null
+++ b/third_party/git/builtin/verify-commit.c
@@ -0,0 +1,90 @@
+/*
+ * Builtin "git commit-commit"
+ *
+ * Copyright (c) 2014 Michael J Gruber <git@drmicha.warpmail.net>
+ *
+ * Based on git-verify-tag
+ */
+#include "cache.h"
+#include "config.h"
+#include "builtin.h"
+#include "object-store.h"
+#include "repository.h"
+#include "commit.h"
+#include "run-command.h"
+#include "parse-options.h"
+#include "gpg-interface.h"
+
+static const char * const verify_commit_usage[] = {
+		N_("git verify-commit [-v | --verbose] <commit>..."),
+		NULL
+};
+
+static int run_gpg_verify(struct commit *commit, unsigned flags)
+{
+	struct signature_check signature_check;
+	int ret;
+
+	memset(&signature_check, 0, sizeof(signature_check));
+
+	ret = check_commit_signature(commit, &signature_check);
+	print_signature_buffer(&signature_check, flags);
+
+	signature_check_clear(&signature_check);
+	return ret;
+}
+
+static int verify_commit(const char *name, unsigned flags)
+{
+	struct object_id oid;
+	struct object *obj;
+
+	if (get_oid(name, &oid))
+		return error("commit '%s' not found.", name);
+
+	obj = parse_object(the_repository, &oid);
+	if (!obj)
+		return error("%s: unable to read file.", name);
+	if (obj->type != OBJ_COMMIT)
+		return error("%s: cannot verify a non-commit object of type %s.",
+				name, type_name(obj->type));
+
+	return run_gpg_verify((struct commit *)obj, flags);
+}
+
+static int git_verify_commit_config(const char *var, const char *value, void *cb)
+{
+	int status = git_gpg_config(var, value, cb);
+	if (status)
+		return status;
+	return git_default_config(var, value, cb);
+}
+
+int cmd_verify_commit(int argc, const char **argv, const char *prefix)
+{
+	int i = 1, verbose = 0, had_error = 0;
+	unsigned flags = 0;
+	const struct option verify_commit_options[] = {
+		OPT__VERBOSE(&verbose, N_("print commit contents")),
+		OPT_BIT(0, "raw", &flags, N_("print raw gpg status output"), GPG_VERIFY_RAW),
+		OPT_END()
+	};
+
+	git_config(git_verify_commit_config, NULL);
+
+	argc = parse_options(argc, argv, prefix, verify_commit_options,
+			     verify_commit_usage, PARSE_OPT_KEEP_ARGV0);
+	if (argc <= i)
+		usage_with_options(verify_commit_usage, verify_commit_options);
+
+	if (verbose)
+		flags |= GPG_VERIFY_VERBOSE;
+
+	/* sometimes the program was terminated because this signal
+	 * was received in the process of writing the gpg input: */
+	signal(SIGPIPE, SIG_IGN);
+	while (i < argc)
+		if (verify_commit(argv[i++], flags))
+			had_error = 1;
+	return had_error;
+}