/*
** Copyright (c) 2007 D. Richard Hipp
**
** This program 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.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
** General Public License for more details.
**
** You should have received a copy of the GNU General Public
** License along with this library; if not, write to the
** Free Software Foundation, Inc., 59 Temple Place - Suite 330,
** Boston, MA 02111-1307, USA.
**
** Author contact information:
** drh@hwaci.com
** http://www.hwaci.com/drh/
**
*******************************************************************************
**
** This file contains code used to check-out versions of the project
** from the local repository.
*/
#include "config.h"
#include "checkout.h"
#include <assert.h>
/*
** Check to see if there is an existing checkout that has been
** modified. Return values:
**
** 0: There is an existing checkout but it is unmodified
** 1: There is a modified checkout - there are unsaved changes
** 2: There is no existing checkout
*/
int unsaved_changes(void){
int vid;
db_must_be_within_tree();
vid = db_lget_int("checkout",0);
if( vid==0 ) return 2;
vfile_check_signature(vid);
return db_exists("SELECT 1 FROM vfile WHERE chnged");
}
/*
** Undo the current check-out. Unlink all files from the disk.
** Clear the VFILE table.
*/
void uncheckout(int vid){
if( vid==0 ) return;
vfile_unlink(vid);
db_multi_exec("DELETE FROM vfile WHERE vid=%d", vid);
}
/*
** Given the abbreviated UUID name of a version, load the content of that
** version in the VFILE table. Return the VID for the version.
**
** If anything goes wrong, panic.
*/
int load_vfile(const char *zName){
Blob uuid;
int vid;
blob_init(&uuid, zName, -1);
if( name_to_uuid(&uuid, 1) ){
fossil_panic(g.zErrMsg);
}
vid = db_int(0, "SELECT rid FROM blob WHERE uuid=%B", &uuid);
if( vid==0 ){
fossil_panic("no such version: %s", g.argv[2]);
}
load_vfile_from_rid(vid);
return vid;
}
/*
** Load a vfile from a record ID.
*/
void load_vfile_from_rid(int vid){
Blob manifest;
if( db_exists("SELECT 1 FROM vfile WHERE vid=%d", vid) ){
return;
}
content_get(vid, &manifest);
vfile_build(vid, &manifest);
blob_reset(&manifest);
}
/*
** Read the manifest file given by vid out of the repository
** and store it in the root of the local check-out.
*/
void manifest_to_disk(int vid){
char *zManFile;
Blob manifest;
Blob hash;
blob_zero(&manifest);
zManFile = mprintf("%smanifest", g.zLocalRoot);
content_get(vid, &manifest);
blob_write_to_file(&manifest, zManFile);
free(zManFile);
blob_zero(&hash);
sha1sum_blob(&manifest, &hash);
blob_reset(&manifest);
zManFile = mprintf("%smanifest.uuid", g.zLocalRoot);
blob_append(&hash, "\n", 1);
blob_write_to_file(&hash, zManFile);
free(zManFile);
blob_reset(&hash);
}
/*
** COMMAND: checkout
**
** Usage: %fossil checkout VERSION ?-f|--force?
** Check out a version specified on the command-line. This command
** will not overwrite edited files in the current checkout unless
** the --force option appears on the command-line.
**
** See also the "update" command.
*/
void checkout_cmd(void){
int forceFlag;
int noWrite;
int vid, prior;
Blob cksum1, cksum1b, cksum2;
db_must_be_within_tree();
db_begin_transaction();
forceFlag = find_option("force","f",0)!=0;
noWrite = find_option("dontwrite",0,0)!=0;
if( g.argc!=3 ) usage("?--force? VERSION");
if( !forceFlag && unsaved_changes()==1 ){
fossil_fatal("there are unsaved changes in the current checkout");
}
if( forceFlag ){
db_multi_exec("DELETE FROM vfile");
prior = 0;
}else{
prior = db_lget_int("checkout",0);
}
vid = load_vfile(g.argv[2]);
if( prior==vid ){
return;
}
if( !noWrite ){
uncheckout(prior);
}
db_multi_exec("DELETE FROM vfile WHERE vid!=%d", vid);
if( !noWrite ){
vfile_to_disk(vid, 0, 1);
manifest_to_disk(vid);
db_lset_int("checkout", vid);
}
db_multi_exec("DELETE FROM vmerge");
vfile_aggregate_checksum_manifest(vid, &cksum1, &cksum1b);
vfile_aggregate_checksum_disk(vid, &cksum2);
if( blob_compare(&cksum1, &cksum2) ){
printf("WARNING: manifest checksum does not agree with disk\n");
}
if( blob_compare(&cksum1, &cksum1b) ){
printf("WARNING: manifest checksum does not agree with manifest\n");
}
db_end_transaction(0);
}
/*
** COMMAND: close
**
** Usage: %fossil close ?-f|--force?
** The opposite of "open". Close the current database connection.
** Require a -f or --force flag if there are unsaved changed in the
** current check-out.
*/
void close_cmd(void){
int forceFlag = find_option("force","f",0)!=0;
db_must_be_within_tree();
if( !forceFlag && unsaved_changes()==1 ){
fossil_fatal("there are unsaved changes in the current checkout");
}
db_close();
unlink(mprintf("%s_FOSSIL_", g.zLocalRoot));
unlink(mprintf("%s_FOSSIL_-journal", g.zLocalRoot));
}