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<?php
/*
* $Id: PropertyTask.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/system/util/Properties.php';
/**
* Task for setting properties in buildfiles.
*
* @author Andreas Aderhold <andi@binarycloud.com>
* @author Hans Lellelid <hans@xmpl.org>
* @version $Revision$
* @package phing.tasks.system
*/
class PropertyTask extends Task {
/** name of the property */
protected $name;
/** value of the property */
protected $value;
protected $reference;
protected $env; // Environment
protected $file;
protected $ref;
protected $prefix;
protected $fallback;
/** Whether to force overwrite of existing property. */
protected $override = false;
/** Whether property should be treated as "user" property. */
protected $userProperty = false;
/**
* Sets a the name of current property component
*/
function setName($name) {
$this->name = (string) $name;
}
/** Get property component name. */
function getName() {
return $this->name;
}
/**
* Sets a the value of current property component.
* @param mixed Value of name, all scalars allowed
*/
function setValue($value) {
$this->value = (string) $value;
}
/**
* Sets value of property to CDATA tag contents.
* @param string $values
* @since 2.2.0
*/
public function addText($value) {
$this->setValue($value);
}
/** Get the value of current property component. */
function getValue() {
return $this->value;
}
/** Set a file to use as the source for properties. */
function setFile($file) {
if (is_string($file)) {
$file = new PhingFile($file);
}
$this->file = $file;
}
/** Get the PhingFile that is being used as property source. */
function getFile() {
return $this->file;
}
function setRefid(Reference $ref) {
$this->reference = $ref;
}
function getRefid() {
return $this->reference;
}
/**
* Prefix to apply to properties loaded using <code>file</code>.
* A "." is appended to the prefix if not specified.
* @param string $prefix prefix string
* @return void
* @since 2.0
*/
public function setPrefix($prefix) {
$this->prefix = $prefix;
if (!StringHelper::endsWith(".", $prefix)) {
$this->prefix .= ".";
}
}
/**
* @return string
* @since 2.0
*/
public function getPrefix() {
return $this->prefix;
}
/**
* the prefix to use when retrieving environment variables.
* Thus if you specify environment="myenv"
* you will be able to access OS-specific
* environment variables via property names "myenv.PATH" or
* "myenv.TERM".
* <p>
* Note that if you supply a property name with a final
* "." it will not be doubled. ie environment="myenv." will still
* allow access of environment variables through "myenv.PATH" and
* "myenv.TERM". This functionality is currently only implemented
* on select platforms. Feel free to send patches to increase the number of platforms
* this functionality is supported on ;).<br>
* Note also that properties are case sensitive, even if the
* environment variables on your operating system are not, e.g. it
* will be ${env.Path} not ${env.PATH} on Windows 2000.
* @param env prefix
*/
function setEnvironment($env) {
$this->env = (string) $env;
}
function getEnvironment() {
return $this->env;
}
/**
* Set whether this is a user property (ro).
* This is deprecated in Ant 1.5, but the userProperty attribute
* of the class is still being set via constructor, so Phing will
* allow this method to function.
* @param boolean $v
*/
function setUserProperty($v) {
$this->userProperty = (boolean) $v;
}
function getUserProperty() {
return $this->userProperty;
}
function setOverride($v) {
$this->override = (boolean) $v;
}
function getOverride() {
return $this->override;
}
function toString() {
return (string) $this->value;
}
/**
* @param Project $p
*/
function setFallback($p) {
$this->fallback = $p;
}
function getFallback() {
return $this->fallback;
}
/**
* set the property in the project to the value.
* if the task was give a file or env attribute
* here is where it is loaded
*/
function main() {
if ($this->name !== null) {
if ($this->value === null && $this->ref === null) {
throw new BuildException("You must specify value or refid with the name attribute", $this->getLocation());
}
} else {
if ($this->file === null && $this->env === null ) {
throw new BuildException("You must specify file or environment when not using the name attribute", $this->getLocation());
}
}
if ($this->file === null && $this->prefix !== null) {
throw new BuildException("Prefix is only valid when loading from a file.", $this->getLocation());
}
if (($this->name !== null) && ($this->value !== null)) {
$this->addProperty($this->name, $this->value);
}
if ($this->file !== null) {
$this->loadFile($this->file);
}
if ( $this->env !== null ) {
$this->loadEnvironment($this->env);
}
if (($this->name !== null) && ($this->ref !== null)) {
// get the refereced property
try {
$this->addProperty($this->name, $this->reference->getReferencedObject($this->project)->toString());
} catch (BuildException $be) {
if ($this->fallback !== null) {
$this->addProperty($this->name, $this->reference->getReferencedObject($this->fallback)->toString());
} else {
throw $be;
}
}
}
}
/**
* load the environment values
* @param string $prefix prefix to place before them
*/
protected function loadEnvironment($prefix) {
$props = new Properties();
if ( substr($prefix, strlen($prefix)-1) == '.' ) {
$prefix .= ".";
}
$this->log("Loading Environment $prefix", PROJECT_MSG_VERBOSE);
foreach($_ENV as $key => $value) {
$props->setProperty($prefix . '.' . $key, $value);
}
$this->addProperties($props);
}
/**
* iterate through a set of properties,
* resolve them then assign them
*/
protected function addProperties($props) {
$this->resolveAllProperties($props);
foreach($props->keys() as $name) {
$value = $props->getProperty($name);
$v = $this->project->replaceProperties($value);
if ($this->prefix !== null) {
$name = $this->prefix . $name;
}
$this->addProperty($name, $v);
}
}
/**
* add a name value pair to the project property set
* @param string $name name of property
* @param string $value value to set
*/
protected function addProperty($name, $value) {
if ($this->userProperty) {
if ($this->project->getUserProperty($name) === null || $this->override) {
$this->project->setInheritedProperty($name, $value);
} else {
$this->log("Override ignored for " . $name, PROJECT_MSG_VERBOSE);
}
} else {
if ($this->override) {
$this->project->setProperty($name, $value);
} else {
$this->project->setNewProperty($name, $value);
}
}
}
/**
* load properties from a file.
* @param PhingFile $file
*/
protected function loadFile(PhingFile $file) {
$props = new Properties();
$this->log("Loading ". $file->getAbsolutePath(), PROJECT_MSG_INFO);
try { // try to load file
if ($file->exists()) {
$props->load($file);
$this->addProperties($props);
} else {
$this->log("Unable to find property file: ". $file->getAbsolutePath() ."... skipped", PROJECT_MSG_WARN);
}
} catch (IOException $ioe) {
throw new BuildException("Could not load properties from file.", $ioe);
}
}
/**
* Given a Properties object, this method goes through and resolves
* any references to properties within the object.
*
* @param Properties $props The collection of Properties that need to be resolved.
* @return void
*/
protected function resolveAllProperties(Properties $props) {
$keys = $props->keys();
while(count($keys)) {
// There may be a nice regex/callback way to handle this
// replacement, but at the moment it is pretty complex, and
// would probably be a lot uglier to work into a preg_replace_callback()
// system. The biggest problem is the fact that a resolution may require
// multiple passes.
$name = array_shift($keys);
$value = $props->getProperty($name);
$resolved = false;
while(!$resolved) {
$fragments = array();
$propertyRefs = array();
// [HL] this was ::parsePropertyString($this->value ...) ... this seems wrong
self::parsePropertyString($value, $fragments, $propertyRefs);
$resolved = true;
if (count($propertyRefs) !== 0) {
$sb = "";
$i = $fragments;
$j = $propertyRefs;
while(count($i)) {
$fragment = array_shift($i);
if ($fragment === null) {
$propertyName = array_shift($j);
if ($propertyName === $name) {
// Should we maybe just log this as an error & move on?
// $this->log("Property ".$name." was circularly defined.", PROJECT_MSG_ERR);
throw new BuildException("Property ".$name." was circularly defined.");
}
$fragment = $this->getProject()->getProperty($propertyName);
if ($fragment === null) {
if ($props->containsKey($propertyName)) {
$fragment = $props->getProperty($propertyName);
$resolved = false; // parse again (could have been replaced w/ another var)
} else {
$fragment = "\${".$propertyName."}";
}
}
}
$sb .= $fragment;
}
$this->log("Resolved Property \"$value\" to \"$sb\"", PROJECT_MSG_DEBUG);
$value = $sb;
$props->setProperty($name, $value);
} // if (count($propertyRefs))
} // while (!$resolved)
} // while (count($keys)
}
/**
* This method will parse a string containing ${value} style
* property values into two lists. The first list is a collection
* of text fragments, while the other is a set of string property names
* null entries in the first list indicate a property reference from the
* second list.
*
* This is slower than regex, but useful for this class, which has to handle
* multiple parsing passes for properties.
*
* @param string $value The string to be scanned for property references
* @param array &$fragments The found fragments
* @param array &$propertyRefs The found refs
*/
protected function parsePropertyString($value, &$fragments, &$propertyRefs) {
$prev = 0;
$pos = 0;
while (($pos = strpos($value, '$', $prev)) !== false) {
if ($pos > $prev) {
array_push($fragments, StringHelper::substring($value, $prev, $pos-1));
}
if ($pos === (strlen($value) - 1)) {
array_push($fragments, '$');
$prev = $pos + 1;
} elseif ($value{$pos+1} !== '{' ) {
// the string positions were changed to value-1 to correct
// a fatal error coming from function substring()
array_push($fragments, StringHelper::substring($value, $pos, $pos + 1));
$prev = $pos + 2;
} else {
$endName = strpos($value, '}', $pos);
if ($endName === false) {
throw new BuildException("Syntax error in property: $value");
}
$propertyName = StringHelper::substring($value, $pos + 2, $endName-1);
array_push($fragments, null);
array_push($propertyRefs, $propertyName);
$prev = $endName + 1;
}
}
if ($prev < strlen($value)) {
array_push($fragments, StringHelper::substring($value, $prev));
}
}
}
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