Misc updates

* Switched to using Composer\InstalledVersions for yaml component version (fixes #47)
* Code tidy (removed redundant IDE hints, breaks, namespace qualifiers)
* Clarified comments

README.md

@@ -29,7 +29,7 @@ Install as a project component with Composer (executable from the project's
 composer require j13k/yaml-lint
 ```
 
-Typically a binary edition (`yaml-lint.phar`) is also available for download
+Typically, a binary edition (`yaml-lint.phar`) is also available for download
 with [each release](https://github.com/j13k/yaml-lint/releases). This embeds
 the latest stable version of the Symfony Yaml component that is current at
 the time of the release.
@@ -62,4 +62,3 @@ The MIT License (MIT). Please see [LICENCE](LICENSE) for more information.
 [link-downloads]: https://packagist.org/packages/j13k/yaml-lint/stats
 [link-dependencies]: https://www.versioneye.com/user/projects/58324238eaa74b004633a7c1
 [link-author]: https://github.com/j13k
-[link-contributors]: ../../contributors

composer.json

@@ -19,6 +19,7 @@
         }
     ],
     "require": {
+        "composer-runtime-api": "^2",
         "symfony/yaml": "^2|^3|^4|^5|^6"
     },
     "autoload": {

src/yaml-lint.php

@@ -9,6 +9,7 @@
  * file that was distributed with this source code.
  */
 
+use Composer\InstalledVersions;
 use J13k\YamlLint\UsageException;
 use Symfony\Component\Yaml\Exception\ParseException;
 use Symfony\Component\Yaml\Yaml;
@@ -28,7 +29,7 @@
 define('YAML_PARSE_PARAM_NAME_FLAGS', 'flags');
 
 // Init app name and args
-$appStr = APP_NAME . ' ' . APP_VERSION;
+$appStr = APP_NAME;
 $argQuiet = false;
 $argPaths = [];
 
@@ -38,23 +39,24 @@
     $pathToTry = null;
     foreach (array('/../../../', '/../vendor/') as $pathToTry) {
         if (is_readable(__DIR__ . $pathToTry . 'autoload.php')) {
-            /** @noinspection PhpIncludeInspection */
             require __DIR__ . $pathToTry . 'autoload.php';
             break;
         }
     }
     if (!class_exists('\Composer\Autoload\ClassLoader')) {
-        throw new \Exception(_msg('composer'));
+        throw new Exception(_msg('composer'));
     }
 
-    // Extract YAML component metadata
-    $componentsManifest = __DIR__ . $pathToTry . 'composer/installed.json';
-    $components = json_decode(file_get_contents($componentsManifest), true);
-    foreach ($components as $component) {
-        if (isset($component['name']) && $component['name'] == 'symfony/yaml') {
-            $appStr .= ', symfony/yaml ' . $component['version'];
-            break;
+    // Build app version string
+    if (class_exists('\Composer\InstalledVersions')) {
+        if (InstalledVersions::isInstalled('j13k/yaml-lint')) {
+            $appStr .= ' ' . InstalledVersions::getPrettyVersion('j13k/yaml-lint');
+        }
+        if (InstalledVersions::isInstalled('symfony/yaml')) {
+            $appStr .= ', symfony/yaml ' . InstalledVersions::getPrettyVersion('symfony/yaml');
         }
+    } else {
+        $appStr .= ' ' . APP_VERSION;
     }
 
     // Process and check args
@@ -78,7 +80,7 @@
         }
     }
 
-    // Currently only one input file or STDIN supported
+    // Currently, only one input file or STDIN supported
     if (count($argPaths) < 1) {
         throw new UsageException('no input specified', EXIT_ERROR);
     }
@@ -94,11 +96,11 @@
 		$yamlParseParams = $yamlParseMethod->getParameters();
 		switch ($yamlParseParams[1]->name) {
 			case YAML_PARSE_PARAM_NAME_EXCEPTION_ON_INVALID_TYPE:
-				// Maintains original behaviour in ^2
+				// Maintains original behaviour in v2
 				Yaml::parse($content, true);
 				break;
 			case YAML_PARSE_PARAM_NAME_FLAGS:
-				// Implements same behaviour in ^3 and ^4
+				// Implements same behaviour in v3+
 				Yaml::parse($content, Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE);
 				break;
 			default:
@@ -156,7 +158,7 @@
     fwrite(STDERR, "\n" . $e->getMessage() . "\n\n");
     exit(EXIT_ERROR);
 
-} catch (\Exception $e) {
+} catch (Exception $e) {
 
     // The rest
     fwrite(STDERR, $appStr);
@@ -196,7 +198,6 @@ function _msg($str)
 Composer dependencies cannot be loaded; install Composer to remedy:
 https://getcomposer.org/download/
 EOD;
-            break;
         case 'usage':
             return <<<EOD
 usage: yaml-lint [options] [input source]
@@ -207,7 +208,6 @@ function _msg($str)
   -h, --help      Display this help
   -V, --version   Display application version
 EOD;
-            break;
         default:
     }