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don't always re-open the same CVS/Entries file, instead keep the
last opened CVS/Entries around to operate on and close it whenever
we switch directory. gives us a small performance boost, obviously.

while doing this, switch the way we write revisions to disk by
using fwrite(3) so stuff can get written to disk in chunks
instead of writing everything line by line, another win.

with help from otto@
ok tobias@

/*	$OpenBSD: remove.c,v 1.78 2008/06/14 03:19:15 joris Exp $	*/
/*
 * Copyright (c) 2005, 2006 Xavier Santolaria <xsa@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 <errno.h>
#include <string.h>
#include <unistd.h>

#include "cvs.h"
#include "remote.h"

extern char *__progname;

void		cvs_remove_force(struct cvs_file *);

static int	force_remove = 0;
static int	removed = 0;
static int	existing = 0;

struct cvs_cmd cvs_cmd_remove = {
	CVS_OP_REMOVE, CVS_USE_WDIR, "remove",
	{ "rm", "delete" },
	"Remove an entry from the repository",
	"[-flR] [file ...]",
	"flR",
	NULL,
	cvs_remove
};

int
cvs_remove(int argc, char **argv)
{
	int ch;
	int flags;
	char *arg = ".";
	struct cvs_recursion cr;

	flags = CR_RECURSE_DIRS;
	while ((ch = getopt(argc, argv, cvs_cmd_remove.cmd_opts)) != -1) {
		switch (ch) {
		case 'f':
			force_remove = 1;
			break;
		case 'l':
			flags &= ~CR_RECURSE_DIRS;
			break;
		case 'R':
			flags |= CR_RECURSE_DIRS;
			break;
		default:
			fatal("%s", cvs_cmd_remove.cmd_synopsis);
		}
	}

	argc -= optind;
	argv += optind;

	cr.enterdir = NULL;
	cr.leavedir = NULL;
	cr.flags = flags;

	if (force_remove == 1 && cvs_noexec == 0) {
		cr.fileproc = cvs_remove_force;
		if (argc > 0)
			cvs_file_run(argc, argv, &cr);
		else
			cvs_file_run(1, &arg, &cr);
	}

	if (current_cvsroot->cr_method != CVS_METHOD_LOCAL) {
		cvs_client_connect_to_server();
		cr.fileproc = cvs_client_sendfile;

		if (!(flags & CR_RECURSE_DIRS))
			cvs_client_send_request("Argument -l");
	} else {
		cr.fileproc = cvs_remove_local;
	}

	if (argc > 0)
		cvs_file_run(argc, argv, &cr);
	else
		cvs_file_run(1, &arg, &cr);

	if (current_cvsroot->cr_method != CVS_METHOD_LOCAL) {
		cvs_client_send_files(argv, argc);
		cvs_client_senddir(".");
		cvs_client_send_request("remove");
		cvs_client_get_responses();
	} else {
		if (existing != 0) {
			cvs_log(LP_ERR, (existing == 1) ?
			    "%d file exists; remove it first" :
			    "%d files exist; remove them first", existing);
		}

		if (removed != 0) {
			if (verbosity > 0) {
				cvs_log(LP_NOTICE,
				    "use '%s commit' to remove %s "
				    "permanently", __progname, (removed > 1) ?
				    "these files" : "this file");
			}
		}
	}

	return (0);
}

void
cvs_remove_force(struct cvs_file *cf)
{
	if (cf->file_type != CVS_DIR) {
		if (cf->fd != -1) {
			if (unlink(cf->file_path) == -1)
				fatal("cvs_remove_force: %s", strerror(errno));
			(void)close(cf->fd);
			cf->fd = -1;
		}
	}
}

void
cvs_remove_local(struct cvs_file *cf)
{
	CVSENTRIES *entlist;
	char *entry, buf[MAXPATHLEN], tbuf[CVS_TIME_BUFSZ], rbuf[CVS_REV_BUFSZ];
	char sticky[CVS_ENT_MAXLINELEN];

	cvs_log(LP_TRACE, "cvs_remove_local(%s)", cf->file_path);

	if (cf->file_type == CVS_DIR) {
		if (verbosity > 1)
			cvs_log(LP_NOTICE, "Removing %s", cf->file_path);
		return;
	}

	if (cvs_cmdop != CVS_OP_CHECKOUT && cvs_cmdop != CVS_OP_UPDATE)
		cvs_file_classify(cf, cvs_directory_tag);

	if (cf->file_status == FILE_UNKNOWN) {
		if (verbosity > 1)
			cvs_log(LP_NOTICE, "nothing known about '%s'",
			    cf->file_path);
		return;
	}

	if (cf->fd != -1) {
		if (verbosity > 1)
			cvs_log(LP_ERR, "file `%s' still in working directory",
			    cf->file_name);
		existing++;
	} else {
		switch (cf->file_status) {
		case FILE_REMOVE_ENTRY:
			entlist = cvs_ent_open(cf->file_wd);
			cvs_ent_remove(entlist, cf->file_name);

			(void)xsnprintf(buf, sizeof(buf), "%s/%s/%s%s",
			    cf->file_wd, CVS_PATH_CVSDIR, cf->file_name,
			    CVS_DESCR_FILE_EXT);

			(void)unlink(buf);

			if (verbosity > 1) {
				cvs_log(LP_NOTICE, "removed `%s'",
				    cf->file_name);
			}
			return;
		case FILE_REMOVED:
			if (verbosity > 0) {
				cvs_log(LP_ERR,
				    "file `%s' already scheduled for removal",
				    cf->file_name);
			}
			return;
		case FILE_LOST:
			rcsnum_tostr(cf->file_ent->ce_rev, rbuf, sizeof(rbuf));

			ctime_r(&cf->file_ent->ce_mtime, tbuf);
			tbuf[strcspn(tbuf, "\n")] = '\0';

			sticky[0] = '\0';
			if (cf->file_ent->ce_tag != NULL)
				(void)xsnprintf(sticky, sizeof(sticky), "T%s",
				    cf->file_ent->ce_tag);

			entry = xmalloc(CVS_ENT_MAXLINELEN);
			cvs_ent_line_str(cf->file_name, rbuf, tbuf,
			    cf->file_ent->ce_opts ? : "", sticky, 0, 1,
			    entry, CVS_ENT_MAXLINELEN);

			if (cvs_server_active == 1) {
				cvs_server_update_entry("Checked-in", cf);
				cvs_remote_output(entry);
			} else {
				entlist = cvs_ent_open(cf->file_wd);
				cvs_ent_add(entlist, entry);
			}

			xfree(entry);

			if (verbosity > 0) {
				cvs_log(LP_NOTICE,
				    "scheduling file `%s' for removal",
				    cf->file_name);
			}

			cf->file_status = FILE_REMOVED;
			removed++;
			break;
		}
	}
}