Merge pull request #25 from glensc/master

Add google closure compiler cli version
2025-08-08 23:26:43 +02:00 · 2012-04-15 14:06:30 -07:00
parent dfdcdf874a 91af676645
commit 8fdf3db564
1 changed files with 123 additions and 0 deletions
--- a/min/lib/Minify/ClosureCompiler.php
+++ b/min/lib/Minify/ClosureCompiler.php
@@ -0,0 +1,123 @@
+<?php
+/**
+ * Class Minify_ClosureCompiler
+ * @package Minify
+ */
+
+/**
+ * Compress Javascript using the Closure Compiler
+ *
+ * You must set $jarFile and $tempDir before calling the minify functions.
+ * Also, depending on your shell's environment, you may need to specify
+ * the full path to java in $javaExecutable or use putenv() to setup the
+ * Java environment.
+ *
+ * <code>
+ * Minify_ClosureCompiler::$jarFile = '/path/to/closure-compiler-20120123.jar';
+ * Minify_ClosureCompiler::$tempDir = '/tmp';
+ * $code = Minify_ClosureCompiler::minify(
+ *   $code,
+ *   array('compilation_level' => 'SIMPLE_OPTIMIZATIONS')
+ * );
+ *
+ * --compilation_level WHITESPACE_ONLY, SIMPLE_OPTIMIZATIONS, ADVANCED_OPTIMIZATIONS
+ *
+ * </code>
+ *
+ * @todo unit tests, $options docs
+ * @todo more options support (or should just passthru them all?)
+ *
+ * @package Minify
+ * @author Stephen Clay <steve@mrclay.org>
+ * @author Elan Ruusamäe <glen@delfi.ee>
+ */
+class Minify_ClosureCompiler {
+
+    /**
+     * Filepath of the Closure Compiler jar file. This must be set before
+     * calling minifyJs().
+     *
+     * @var string
+     */
+    public static $jarFile = null;
+
+    /**
+     * Writable temp directory. This must be set before calling minifyJs().
+     *
+     * @var string
+     */
+    public static $tempDir = null;
+
+    /**
+     * Filepath of "java" executable (may be needed if not in shell's PATH)
+     *
+     * @var string
+     */
+    public static $javaExecutable = 'java';
+
+    /**
+     * Minify a Javascript string
+     *
+     * @param string $js
+     *
+     * @param array $options (verbose is ignored)
+     *
+     * @see https://code.google.com/p/closure-compiler/source/browse/trunk/README
+     *
+     * @return string
+     */
+    public static function minify($js, $options = array())
+    {
+        self::_prepare();
+        if (! ($tmpFile = tempnam(self::$tempDir, 'cc_'))) {
+            throw new Exception('Minify_ClosureCompiler : could not create temp file.');
+        }
+        file_put_contents($tmpFile, $js);
+        exec(self::_getCmd($options, $tmpFile), $output, $result_code);
+        unlink($tmpFile);
+        if ($result_code != 0) {
+            throw new Exception('Minify_ClosureCompiler : Closure Compiler execution failed.');
+        }
+        return implode("\n", $output);
+    }
+
+    private static function _getCmd($userOptions, $tmpFile)
+    {
+        $o = array_merge(
+            array(
+                'charset' => 'utf-8',
+                'compilation_level' => 'SIMPLE_OPTIMIZATIONS',
+            ),
+            $userOptions
+        );
+        $cmd = self::$javaExecutable . ' -jar ' . escapeshellarg(self::$jarFile)
+             . (preg_match('/^[\\da-zA-Z0-9\\-]+$/', $o['charset'])
+                ? " --charset {$o['charset']}"
+                : '');
+
+        foreach (array('compilation_level') as $opt) {
+            if ($o[$opt]) {
+                $cmd .= " --{$opt} ". escapeshellarg($o[$opt]);
+            }
+        }
+        return $cmd . ' ' . escapeshellarg($tmpFile);
+    }
+
+    private static function _prepare()
+    {
+        if (! is_file(self::$jarFile)) {
+            throw new Exception('Minify_ClosureCompiler : $jarFile('.self::$jarFile.') is not a valid file.');
+        }
+        if (! is_readable(self::$jarFile)) {
+            throw new Exception('Minify_ClosureCompiler : $jarFile('.self::$jarFile.') is not readable.');
+        }
+        if (! is_dir(self::$tempDir)) {
+            throw new Exception('Minify_ClosureCompiler : $tempDir('.self::$tempDir.') is not a valid direcotry.');
+        }
+        if (! is_writable(self::$tempDir)) {
+            throw new Exception('Minify_ClosureCompiler : $tempDir('.self::$tempDir.') is not writable.');
+        }
+    }
+}
+
+/* vim:ts=4:sw=4:et */