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<?php
/*
* $Id: CapsuleTask.php 59 2006-04-28 14:49:47Z 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>.
*/
include_once 'phing/Task.php';
include_once 'phing/BuildException.php';
include_once 'phing/lib/Capsule.php';
include_once 'phing/util/StringHelper.php';
/**
* A phing task for generating output by using Capsule.
*
* This is based on the interface to TexenTask from Apache's Velocity engine.
*
* @author Hans Lellelid <hans@xmpl.org>
* @version $Revision: 1.17 $
* @package phing.tasks.ext
*/
class CapsuleTask extends Task {
/**
* Capsule "template" engine.
* @var Capsule
*/
protected $context;
/**
* Any vars assigned via the build file.
* @var array AssignedVar[]
*/
protected $assignedVars = array();
/**
* This is the control template that governs the output.
* It may or may not invoke the services of worker
* templates.
* @var string
*/
protected $controlTemplate;
/**
* This is where Velocity will look for templates
* using the file template loader.
* @var string
*/
protected $templatePath;
/**
* This is where texen will place all the output
* that is a product of the generation process.
* @var string
*/
protected $outputDirectory;
/**
* This is the file where the generated text
* will be placed.
* @var string
*/
protected $outputFile;
/**
* <p>
* These are properties that are fed into the
* initial context from a properties file. This
* is simply a convenient way to set some values
* that you wish to make available in the context.
* </p>
* <p>
* These values are not critical, like the template path
* or output path, but allow a convenient way to
* set a value that may be specific to a particular
* generation task.
* </p>
* <p>
* For example, if you are generating scripts to allow
* user to automatically create a database, then
* you might want the <code>$databaseName</code>
* to be placed
* in the initial context so that it is available
* in a script that might look something like the
* following:
* <code><pre>
* #!bin/sh
*
* echo y | mysqladmin create $databaseName
* </pre></code>
* The value of <code>$databaseName</code> isn't critical to
* output, and you obviously don't want to change
* the ant task to simply take a database name.
* So initial context values can be set with
* properties file.
*
* @var array
*/
protected $contextProperties;
// -----------------------------------------------------------------------
// The following getters & setters are used by phing to set properties
// specified in the XML for the capsule task.
// -----------------------------------------------------------------------
/**
* [REQUIRED] Set the control template for the
* generating process.
* @param string $controlTemplate
* @return void
*/
public function setControlTemplate ($controlTemplate) {
$this->controlTemplate = $controlTemplate;
}
/**
* Get the control template for the
* generating process.
* @return string
*/
public function getControlTemplate() {
return $this->controlTemplate;
}
/**
* [REQUIRED] Set the path where Velocity will look
* for templates using the file template
* loader.
* @return void
* @throws Exception
*/
public function setTemplatePath($templatePath) {
$resolvedPath = "";
$tok = strtok($templatePath, ",");
while ( $tok ) {
// resolve relative path from basedir and leave
// absolute path untouched.
$fullPath = $this->project->resolveFile($tok);
$cpath = $fullPath->getCanonicalPath();
if ($cpath === false) {
$this->log("Template directory does not exist: " . $fullPath->getAbsolutePath());
} else {
$resolvedPath .= $cpath;
}
$tok = strtok(",");
if ( $tok ) {
$resolvedPath .= ",";
}
}
$this->templatePath = $resolvedPath;
}
/**
* Get the path where Velocity will look
* for templates using the file template
* loader.
* @return string
*/
public function getTemplatePath() {
return $this->templatePath;
}
/**
* [REQUIRED] Set the output directory. It will be
* created if it doesn't exist.
* @param PhingFile $outputDirectory
* @return void
* @throws Exception
*/
public function setOutputDirectory(PhingFile $outputDirectory) {
try {
if (!$outputDirectory->exists()) {
$this->log("Output directory does not exist, creating: " . $outputDirectory->getPath(),PROJECT_MSG_VERBOSE);
if (!$outputDirectory->mkdirs()) {
throw new IOException("Unable to create Ouptut directory: " . $outputDirectory->getAbsolutePath());
}
}
$this->outputDirectory = $outputDirectory->getCanonicalPath();
} catch (IOException $ioe) {
throw new BuildException($ioe);
}
}
/**
* Get the output directory.
* @return string
*/
public function getOutputDirectory() {
return $this->outputDirectory;
}
/**
* [REQUIRED] Set the output file for the
* generation process.
* @param string $outputFile (TODO: change this to File)
* @return void
*/
public function setOutputFile($outputFile) {
$this->outputFile = $outputFile;
}
/**
* Get the output file for the
* generation process.
* @return string
*/
public function getOutputFile() {
return $this->outputFile;
}
/**
* Set the context properties that will be
* fed into the initial context be the
* generating process starts.
* @param string $file
* @return void
*/
public function setContextProperties($file) {
$sources = explode(",", $file);
$this->contextProperties = new Properties();
// Always try to get the context properties resource
// from a file first. Templates may be taken from a JAR
// file but the context properties resource may be a
// resource in the filesystem. If this fails than attempt
// to get the context properties resource from the
// classpath.
for ($i=0, $sourcesLength=count($sources); $i < $sourcesLength; $i++) {
$source = new Properties();
try {
// resolve relative path from basedir and leave
// absolute path untouched.
$fullPath = $this->project->resolveFile($sources[$i]);
$this->log("Using contextProperties file: " . $fullPath->toString());
$source->load($fullPath);
} catch (Exception $e) {
throw new BuildException("Context properties file " . $sources[$i] .
" could not be found in the file system!");
}
$keys = $source->keys();
foreach ($keys as $key) {
$name = $key;
$value = $this->project->replaceProperties($source->getProperty($name));
$this->contextProperties->setProperty($name, $value);
}
}
}
/**
* Get the context properties that will be
* fed into the initial context be the
* generating process starts.
* @return Properties
*/
public function getContextProperties() {
return $this->contextProperties;
}
/**
* Creates an "AssignedVar" class.
*/
public function createAssign() {
$a = new AssignedVar();
$this->assignedVars[] = $a;
return $a;
}
// ---------------------------------------------------------------
// End of XML setters & getters
// ---------------------------------------------------------------
/**
* Creates a Smarty object.
*
* @return Smarty initialized (cleared) Smarty context.
* @throws Exception the execute method will catch
* and rethrow as a <code>BuildException</code>
*/
public function initControlContext() {
$this->context->clear();
foreach($this->assignedVars as $var) {
$this->context->put($var->getName(), $var->getValue());
}
return $this->context;
}
/**
* Execute the input script with Velocity
*
* @throws BuildException
* BuildExceptions are thrown when required attributes are missing.
* Exceptions thrown by Velocity are rethrown as BuildExceptions.
*/
public function main() {
// Make sure the template path is set.
if (empty($this->templatePath)) {
throw new BuildException("The template path needs to be defined!");
}
// Make sure the control template is set.
if ($this->controlTemplate === null) {
throw new BuildException("The control template needs to be defined!");
}
// Make sure the output directory is set.
if ($this->outputDirectory === null) {
throw new BuildException("The output directory needs to be defined!");
}
// Make sure there is an output file.
if ($this->outputFile === null) {
throw new BuildException("The output file needs to be defined!");
}
// Setup Smarty runtime.
// Smarty uses one object to store properties and to store
// the context for the template (unlike Velocity). We setup this object, calling it
// $this->context, and then initControlContext simply zeros out
// any assigned variables.
$this->context = new Capsule();
if ($this->templatePath !== null) {
$this->log("Using templatePath: " . $this->templatePath);
$this->context->setTemplatePath($this->templatePath);
}
// Make sure the output directory exists, if it doesn't
// then create it.
$outputDir = new PhingFile($this->outputDirectory);
if (!$outputDir->exists()) {
$this->log("Output directory does not exist, creating: " . $outputDir->getAbsolutePath());
$outputDir->mkdirs();
}
$this->context->setOutputDirectory($outputDir->getAbsolutePath());
$path = $this->outputDirectory . DIRECTORY_SEPARATOR . $this->outputFile;
$this->log("Generating to file " . $path);
//$writer = new FileWriter($path);
// The generator and the output path should
// be placed in the init context here and
// not in the generator class itself.
$c = $this->initControlContext();
// Set any variables that need to always
// be loaded
$this->populateInitialContext($c);
// Feed all the options into the initial
// control context so they are available
// in the control/worker templates.
if ($this->contextProperties !== null) {
foreach($this->contextProperties->keys() as $property) {
$value = $this->contextProperties->getProperty($property);
// Special exception (from Texen)
// for properties ending in file.contents:
// in that case we dump the contents of the file
// as the "value" for the Property.
if (preg_match('/file\.contents$/', $property)) {
// pull in contents of file specified
$property = substr($property, 0, strpos($property, "file.contents") - 1);
// reset value, and then
// read in teh contents of the file into that var
$value = "";
$f = new PhingFile($project->resolveFile($value)->getCanonicalPath());
if ($f->exists()) {
$fr = new FileReader($f);
$fr->readInto($value);
}
} // if ends with file.contents
if (StringHelper::isBoolean($value)) {
$value = StringHelper::booleanValue($value);
}
$c->put($property, $value);
} // foreach property
} // if contextProperties !== null
try {
$this->log("Parsing control template: " . $this->controlTemplate);
$c->parse($this->controlTemplate, $path);
} catch (Exception $ioe) {
throw new BuildException("Cannot write parsed template: ". $ioe->getMessage());
}
$this->cleanup();
}
/**
* Place useful objects into the initial context.
*
*
* @param Capsule $context The context to populate, as retrieved from
* {@link #initControlContext()}.
* @return void
* @throws Exception Error while populating context. The {@link
* #main()} method will catch and rethrow as a
* <code>BuildException</code>.
*/
protected function populateInitialContext(Capsule $context) {
$this->context->put("now", strftime("%c", time()));
$this->context->put("task", $this);
}
/**
* A hook method called at the end of {@link #execute()} which can
* be overridden to perform any necessary cleanup activities (such
* as the release of database connections, etc.). By default,
* does nothing.
* @return void
* @throws Exception Problem cleaning up.
*/
protected function cleanup() {
}
}
/**
* An "inner" class for holding assigned var values.
* May be need to expand beyond name/value in the future.
*/
class AssignedVar {
private $name;
private $value;
function setName($v) {
$this->name = $v;
}
function setValue($v) {
$this->value = $v;
}
function getName() {
return $this->name;
}
function getValue() {
return $this->value;
}
}
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