Project: Git
Code Location: git://github.com/git/git.gitmaster
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test-revision-walking.c
/*
 * test-revision-walking.c: test revision walking API.
 *
 * (C) 2012 Heiko Voigt <hvoigt@hvoigt.net>
 *
 * This code is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include "cache.h"
#include "commit.h"
#include "diff.h"
#include "revision.h"

static void print_commit(struct commit *commit)
{
	struct strbuf sb = STRBUF_INIT;
	struct pretty_print_context ctx = {0};
	ctx.date_mode = DATE_NORMAL;
	format_commit_message(commit, " %m %s", &sb, &ctx);
	printf("%s\n", sb.buf);
	strbuf_release(&sb);
}

static int run_revision_walk(void)
{
	struct rev_info rev;
	struct commit *commit;
	const char *argv[] = {NULL, "--all", NULL};
	int argc = ARRAY_SIZE(argv) - 1;
	int got_revision = 0;

	init_revisions(&rev, NULL);
	setup_revisions(argc, argv, &rev, NULL);
	if (prepare_revision_walk(&rev))
		die("revision walk setup failed");

	while ((commit = get_revision(&rev)) != NULL) {
		print_commit(commit);
		got_revision = 1;
	}

	reset_revision_walk();
	return got_revision;
}

int main(int argc, char **argv)
{
	if (argc < 2)
		return 1;

	if (!strcmp(argv[1], "run-twice")) {
		printf("1st\n");
		if (!run_revision_walk())
			return 1;
		printf("2nd\n");
		if (!run_revision_walk())
			return 1;

		return 0;
	}

	fprintf(stderr, "check usage\n");
	return 1;
}