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commit the new opencvs code, i have been hacking on
this for the past 2 weeks now and it should go in at
the start of the hackathon so others can help out.

this code is a lot safer, smarter, faster and best of
all it is actually doing what it is suppose to do!

basic checkout, update, status, diff and commit are
working in local mode only.
there is no support for any remote setups now.

/*	$OpenBSD: checkout.c,v 1.53 2006/05/27 03:30:30 joris Exp $	*/
/*
 * Copyright (c) 2006 Joris Vink <joris@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "includes.h"

#include "cvs.h"
#include "log.h"
#include "diff.h"
#include "proto.h"

int	cvs_checkout(int, char **);
static void checkout_repository(const char *, const char *);

struct cvs_cmd cvs_cmd_checkout = {
	CVS_OP_CHECKOUT, CVS_REQ_CO, "checkout",
	{ "co", "get" },
	"Checkout a working copy of a repository",
	"[-AcflNnPpRs] [-D date | -r tag] [-d dir] [-j rev] [-k mode] "
	"[-t id] module ...",
	"AcD:d:fj:k:lNnPRr:st:",
	NULL,
	cvs_checkout
};

int
cvs_checkout(int argc, char **argv)
{
	int i, ch, l;
	struct stat st;
	char repo[MAXPATHLEN];

	while ((ch = getopt(argc, argv, cvs_cmd_checkout.cmd_opts)) != -1) {
		switch (ch) {
		default:
			fatal("%s", cvs_cmd_checkout.cmd_synopsis);
		}
	}

	argc -= optind;
	argv += optind;

	if (argc == 0)
		fatal("%s", cvs_cmd_checkout.cmd_synopsis);

	for (i = 0; i < argc; i++) {
		cvs_mkpath(argv[i]);

		l = snprintf(repo, sizeof(repo), "%s/%s",
		    current_cvsroot->cr_dir, argv[i]);
		if (l == -1 || l >= (int)sizeof(repo))
			fatal("cvs_checkout: overflow");

		if (stat(repo, &st) == -1) {
			cvs_log(LP_ERR, "cannot find repository %s - ignored",
			    argv[i]);
			continue;
		}

		checkout_repository(repo, argv[i]);
	}

	return (0);
}

static void
checkout_repository(const char *repobase, const char *wdbase)
{
	struct cvs_flisthead fl, dl;
	struct cvs_recursion cr;

	TAILQ_INIT(&fl);
	TAILQ_INIT(&dl);

	cr.enterdir = cvs_update_enterdir;
	cr.leavedir = NULL;
	cr.local = cvs_update_local;
	cr.remote = NULL;

	cvs_repository_lock(repobase);
	cvs_repository_getdir(repobase, wdbase, &fl, &dl);

	cvs_file_walklist(&fl, &cr);
	cvs_file_freelist(&fl);

	cvs_repository_unlock(repobase);

	cvs_file_walklist(&dl, &cr);
	cvs_file_freelist(&dl);
}

int
cvs_checkout_file(struct cvs_file *cf, RCSNUM *rnum, int flags)
{
	BUF *bp;
	int l, oflags, exists;
	time_t rcstime;
	CVSENTRIES *ent;
	struct timeval tv[2];
	char *entry, rev[16], timebuf[32];

	rcsnum_tostr(rnum, rev, sizeof(rev));

	cvs_log(LP_TRACE, "cvs_checkout_file(%s, %s, %d)",
	    cf->file_path, rev, flags);

	if ((bp = rcs_getrev(cf->file_rcs, rnum)) == NULL) {
		cvs_log(LP_ERR, "%s: cannot find revision %s",
		    cf->file_path, rev);
		return (0);
	}

	oflags = O_WRONLY | O_TRUNC;
	if (cf->fd != -1) {
		exists = 1;
		(void)close(cf->fd);
	} else  {
		exists = 0;
		oflags |= O_CREAT;
	}

	cf->fd = open(cf->file_path, oflags);
	if (cf->fd == -1)
		fatal("cvs_checkout_file: open: %s", strerror(errno));

	if (cvs_buf_write_fd(bp, cf->fd) == -1)
		fatal("cvs_checkout_file: %s", strerror(errno));

	cvs_buf_free(bp);

	if (fchmod(cf->fd, 0644) == -1)
		fatal("cvs_checkout_file: fchmod: %s", strerror(errno));

	if (exists == 0) {
		rcstime = rcs_rev_getdate(cf->file_rcs, rnum);
		if ((rcstime = cvs_hack_time(rcstime, 0)) == 0)
			fatal("cvs_checkout_file: time conversion failed");
	} else {
		time(&rcstime);
	}

	tv[0].tv_sec = rcstime;
	tv[0].tv_usec = 0;
	tv[1] = tv[0];
	if (futimes(cf->fd, tv) == -1)
		fatal("cvs_checkout_file: futimes: %s", strerror(errno));

	if ((rcstime = cvs_hack_time(rcstime, 1)) == 0)
		fatal("cvs_checkout_file: to gmt failed");

	ctime_r(&rcstime, timebuf);
	if (timebuf[strlen(timebuf) - 1] == '\n')
		timebuf[strlen(timebuf) - 1] = '\0';

	entry = xmalloc(CVS_ENT_MAXLINELEN);
	l = snprintf(entry, CVS_ENT_MAXLINELEN, "/%s/%s/%s//", cf->file_name,
	    rev, timebuf);

	ent = cvs_ent_open(cf->file_wd);
	cvs_ent_add(ent, entry);
	cvs_ent_close(ent, ENT_SYNC);

	xfree(entry);

	return (1);
}