Move SassTask to own repo.

.gitignore

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+/.idea/
+/vendor/
+/composer.lock
+/custom.task.properties
+/custom.type.properties

composer.json

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+{
+  "name": "phing/task-sass",
+  "description": "SassTask.",
+  "minimum-stability": "dev",
+  "prefer-stable": true,
+  "license": "LGPL-3.0-only",
+  "type": "phing-extension",
+  "authors": [
+    {
+      "name": "Siad Ardroumli",
+      "email": "[email protected]"
+    }
+  ],
+  "require": {
+    "php": ">= 7.1"
+  },
+  "require-dev": {
+    "phing/phing": "3.0.x-dev",
+    "scssphp/scssphp": "~1.0"
+  },
+  "autoload": {
+    "psr-4": {
+      "Phing\\Task\\Ext\\": "src/"
+    }
+  },
+  "extra": {
+    "phing-custom-taskdefs": {
+      "sass": "Phing\\Task\\Ext\\SassTask"
+    }
+  }
+}

src/SassCompiler.php

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+<?php
+/**
+ * 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>.
+ */
+
+declare(strict_types=1);
+
+namespace Phing\Task\Ext;
+
+use Exception;
+use Phing\Exception\BuildException;
+use Phing\Project;
+
+class SassCompiler implements SassTaskCompiler
+{
+
+    /**
+     * @var string
+     */
+    private $executable;
+
+    /**
+     * @var string
+     */
+    private $flags;
+
+    public function __construct(string $executable, string $flags)
+    {
+        $this->executable = $executable;
+        $this->flags = $flags;
+    }
+
+    /**
+     * @throws BuildException
+     */
+    public function compile(string $inputFilePath, string $outputFilePath, bool $failOnError): void
+    {
+        try {
+            $output = $this->executeCommand($inputFilePath, $outputFilePath);
+            if ($failOnError && $output[0] !== 0) {
+                throw new BuildException(
+                    "Result returned as not 0. Result: {$output[0]}",
+                    Project::MSG_INFO
+                );
+            }
+        } catch (Exception $e) {
+            if ($failOnError) {
+                throw new BuildException($e);
+            }
+        }
+    }
+
+    /**
+     * Executes the command and returns return code and output.
+     *
+     * @param string $inputFile Input file
+     * @param string $outputFile Output file
+     *
+     * @access protected
+     * @throws BuildException
+     * @return array array(return code, array with output)
+     */
+    private function executeCommand($inputFile, $outputFile)
+    {
+        // Prevent over-writing existing file.
+        if ($inputFile == $outputFile) {
+            throw new BuildException('Input file and output file are the same!');
+        }
+
+        $output = [];
+        $return = null;
+
+        $fullCommand = $this->executable;
+
+        if (strlen($this->flags) > 0) {
+            $fullCommand .= " {$this->flags}";
+        }
+
+        $fullCommand .= " {$inputFile} {$outputFile}";
+
+        exec($fullCommand, $output, $return);
+
+        return [$return, $output];
+    }
+}