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<?php
/*
* $Id: DbDeployTask.php 636 2009-12-03 10:08:37Z mrook $
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the LGPL. For more information please see
* <http://phing.info>.
*/
require_once 'phing/Task.php';
require_once 'phing/tasks/ext/dbdeploy/DbmsSyntaxFactory.php';
/**
* Generate SQL script for db using dbdeploy schema version table and delta scripts
*
* <dbdeploy url="mysql:host=localhost;dbname=test" userid="dbdeploy" password="dbdeploy" dir="db" outputfile="">
*
* @author Luke Crouch at SourceForge (http://sourceforge.net)
* @version $Revision: 636 $
* @package phing.tasks.ext.dbdeploy
*/
class DbDeployTask extends Task {
public static $TABLE_NAME = 'changelog';
protected $url;
protected $userid;
protected $password;
protected $dir;
protected $outputFile = 'dbdeploy_deploy.sql';
protected $undoOutputFile = 'dbdeploy_undo.sql';
protected $deltaSet = 'Main';
protected $lastChangeToApply = 999;
protected $dbmsSyntax = null;
function main() {
try{
// get correct DbmsSyntax object
$dbms = substr($this->url, 0, strpos($this->url, ':'));
$dbmsSyntaxFactory = new DbmsSyntaxFactory($dbms);
$this->dbmsSyntax = $dbmsSyntaxFactory->getDbmsSyntax();
// open file handles for output
$outputFileHandle = fopen($this->outputFile, "w+");
$undoOutputFileHandle = fopen($this->undoOutputFile, "w+");
// figure out which revisions are in the db already
$this->appliedChangeNumbers = $this->getAppliedChangeNumbers();
$this->log('Current db revision: ' . $this->getLastChangeAppliedInDb());
// generate sql file needed to take db to "lastChangeToApply" version
$doSql = $this->doDeploy();
$undoSql = $this->undoDeploy();
// write the do and undo SQL to their respective files
fwrite($outputFileHandle, $doSql);
fwrite($undoOutputFileHandle, $undoSql);
} catch (Exception $e){
throw new BuildException($e);
}
}
function getAppliedChangeNumbers(){
if(count($this->appliedChangeNumbers) == 0){
$this->log('Getting applied changed numbers from DB: ' . $this->url );
$appliedChangeNumbers = array();
$dbh = new PDO($this->url, $this->userid, $this->password);
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$sql = "SELECT * FROM " . DbDeployTask::$TABLE_NAME . " WHERE delta_set = '$this->deltaSet' ORDER BY change_number";
foreach($dbh->query($sql) as $change){
$appliedChangeNumbers[] = $change['change_number'];
}
$this->appliedChangeNumbers = $appliedChangeNumbers;
}
return $this->appliedChangeNumbers;
}
function getLastChangeAppliedInDb(){
return (count($this->appliedChangeNumbers) > 0) ? max($this->appliedChangeNumbers) : 0;
}
function doDeploy(){
$sqlToPerformDeploy = '';
$lastChangeAppliedInDb = $this->getLastChangeAppliedInDb();
$files = $this->getDeltasFilesArray();
ksort($files);
foreach($files as $fileChangeNumber=>$fileName){
if($fileChangeNumber > $lastChangeAppliedInDb && $fileChangeNumber <= $this->lastChangeToApply){
$sqlToPerformDeploy .= '-- Fragment begins: ' . $fileChangeNumber . ' --' . "\n";
$sqlToPerformDeploy .= 'INSERT INTO ' . DbDeployTask::$TABLE_NAME . ' (change_number, delta_set, start_dt, applied_by, description)'.
' VALUES ('. $fileChangeNumber .', \''. $this->deltaSet .'\', '. $this->dbmsSyntax->generateTimestamp() .', \'dbdeploy\', \''. $fileName .'\');' . "\n";
$fullFileName = $this->dir . '/' . $fileName;
$fh = fopen($fullFileName, 'r');
$contents = fread($fh, filesize($fullFileName));
// allow construct with and without space added
$deploySQLFromFileSplit = strpos($contents, '-- //@UNDO');
if ($deploySQLFromFileSplit === false)
$deploySQLFromFileSplit = strpos($contents, '--//@UNDO');
$deploySQLFromFile = substr($contents,0,$deploySQLFromFileSplit);
$sqlToPerformDeploy .= $deploySQLFromFile;
$sqlToPerformDeploy .= 'UPDATE ' . DbDeployTask::$TABLE_NAME . ' SET complete_dt = ' . $this->dbmsSyntax->generateTimestamp() . ' WHERE change_number = ' . $fileChangeNumber . ' AND delta_set = \'' . $this->deltaSet . '\';' . "\n";
$sqlToPerformDeploy .= '-- Fragment ends: ' . $fileChangeNumber . ' --' . "\n";
}
}
return $sqlToPerformDeploy;
}
function undoDeploy(){
$sqlToPerformUndo = '';
$lastChangeAppliedInDb = $this->getLastChangeAppliedInDb();
$files = $this->getDeltasFilesArray();
krsort($files);
foreach($files as $fileChangeNumber=>$fileName){
if($fileChangeNumber > $lastChangeAppliedInDb && $fileChangeNumber <= $this->lastChangeToApply){
$fullFileName = $this->dir . '/' . $fileName;
$fh = fopen($fullFileName, 'r');
$contents = fread($fh, filesize($fullFileName));
$undoSQLFromFile = substr($contents,strpos($contents, '-- //@UNDO')+10);
$sqlToPerformUndo .= $undoSQLFromFile;
$sqlToPerformUndo .= 'DELETE FROM ' . DbDeployTask::$TABLE_NAME . ' WHERE change_number = ' . $fileChangeNumber . ' AND delta_set = \'' . $this->deltaSet . '\';' . "\n";
$sqlToPerformUndo .= '-- Fragment ends: ' . $fileChangeNumber . ' --' . "\n";
}
}
return $sqlToPerformUndo;
}
function getDeltasFilesArray(){
$baseDir = realpath($this->dir);
$dh = opendir($baseDir);
$fileChangeNumberPrefix = '';
while(($file = readdir($dh)) !== false){
if(preg_match('[\d+]', $file, $fileChangeNumberPrefix)){
$files[intval($fileChangeNumberPrefix[0])] = $file;
}
}
return $files;
}
function setUrl($url){
$this->url = $url;
}
function setUserId($userid){
$this->userid = $userid;
}
function setPassword($password){
$this->password = $password;
}
function setDir($dir){
$this->dir = $dir;
}
function setOutputFile($outputFile){
$this->outputFile = $outputFile;
}
function setUndoOutputFile($undoOutputFile){
$this->undoOutputFile = $undoOutputFile;
}
function setLastChangeToApply($lastChangeToApply){
$this->lastChangeToApply = $lastChangeToApply;
}
function setDeltaSet($deltaSet){
$this->deltaSet = $deltaSet;
}
/**
* Add a new fileset.
* @return FileSet
*/
public function createFileSet() {
$this->fileset = new FileSet();
$this->filesets[] = $this->fileset;
return $this->fileset;
}
}
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