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<?php
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/*
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 * $Id: IncludePathTask.php 144 2007-02-05 15:19:00Z hans $
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 *
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 * This software consists of voluntary contributions made by many individuals
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 * and is licensed under the LGPL. For more information please see
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 * <http://phing.info>.
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 */
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require_once 'phing/Task.php';
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include_once 'phing/types/Path.php';
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/**
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 * Adds a normalized path to the PHP include_path.
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 *
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 * This provides a way to alter the include_path without editing any global php.ini settings
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 * or PHP_CLASSPATH environment variable.
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 *
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 * <code>
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 *   <includepath classpath="new/path/here"/>
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 * </code>
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 *
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 * @author    Hans Lellelid <hans@xmpl.org>
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 * @version   $Revision: 1.1 $
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 * @package   phing.tasks.system
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 */
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class IncludePathTask extends Task {
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    /**
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     * Classname of task to register.
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     * This can be a dot-path -- relative to a location on PHP include_path.
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     * E.g. path.to.MyClass ->  path/to/MyClass.php
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     * @var string
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     */
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    private $classname;
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    /**
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     * Path to add to PHP include_path to aid in finding specified class.
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     * @var Path
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     */
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    private $classpath;
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    /**
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     * Refid to already defined classpath
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     */
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    private $classpathId;
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    /**
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     * Set the classpath to be used when searching for component being defined
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     *
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     * @param Path $classpath An Path object containing the classpath.
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     */
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    public function setClasspath(Path $classpath) {
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        if ($this->classpath === null) {
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            $this->classpath = $classpath;
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        } else {
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            $this->classpath->append($classpath);
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        }
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    }
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    /**
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     * Create the classpath to be used when searching for component being defined
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     */
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    public function createClasspath() {
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        if ($this->classpath === null) {
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            $this->classpath = new Path($this->project);
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        }
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        return $this->classpath->createPath();
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    }
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    /**
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     * Reference to a classpath to use when loading the files.
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     */
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    public function setClasspathRef(Reference $r) {
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        $this->classpathId = $r->getRefId();
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        $this->createClasspath()->setRefid($r);
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    }
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    /** Main entry point */
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    public function main() {
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        // Apparently casting to (string) no longer invokes __toString() automatically.
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        if (is_object($this->classpath)) {
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            $this->classpath = $this->classpath->__toString();
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        }
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        if (empty($this->classpath)) {
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            throw new BuildException("Provided classpath was empty.");
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        }
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        $curr_parts = explode(PATH_SEPARATOR, get_include_path());
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        $add_parts = explode(PATH_SEPARATOR, $this->classpath);
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        $new_parts = array_diff($add_parts, $curr_parts);
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        if ($new_parts) {
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            $this->log("Prepending new include_path components: " . implode(PATH_SEPARATOR, $new_parts), Project::MSG_VERBOSE);
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            set_include_path(implode(PATH_SEPARATOR, array_merge($new_parts, $curr_parts)));
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        }
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    }
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}