Add pngcrush helper

Author: codebarista

README.md

@@ -1,6 +1,6 @@
 # Laravel Essentials
 
-Growing library for simple macros, facades and other helpers in the Laravel cosmos .
+Growing library for simple macros, facades and other helpers in the Laravel cosmos.
 
 ## Installation
 

bootstrap/helpers.php

@@ -13,3 +13,22 @@ function decode_json(string $value): array
         return \Illuminate\Support\Str::toJson($value);
     }
 }
+
+if (! function_exists('crush_png')) {
+    function crush_png(string $image): bool
+    {
+        if ($pngcrush = exec('which pngcrush')) {
+            $format = '%s -d %s -q -rem alla %s > /dev/null 2>&1';
+            $dir = rtrim(sys_get_temp_dir(), DIRECTORY_SEPARATOR);
+            $name = basename($image);
+
+            $command = sprintf($format, $pngcrush, $dir, escapeshellarg($image));
+
+            if (exec($command) !== false) {
+                return rename($dir.DIRECTORY_SEPARATOR.$name, $image);
+            }
+        }
+
+        return false;
+    }
+}

tests/Feature/HelpersTest.php

@@ -24,3 +24,15 @@
         ->toContain('greeting');
 
 })->covers('encode_json');
+
+it('can crush png', function () {
+    $version = null;
+
+    if ($pngcrush = exec('which pngcrush')) {
+        $version = exec($pngcrush.' --version');
+    }
+
+    expect($version)->toBeString();
+    // ->toContain('pngcrush');
+
+})->covers('crush_png');