added print help

Author: Alexsey-VR

.gitignore

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+/vendor/

Makefile

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+install:
+	composer install
+
+validate:
+	composer validate
+
+lint:
+	composer exec --verbose phpcs -- --standard=PSR12 src bin

bin/gendiff

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+#!/usr/bin/env php
+<?php
+
+require_once __DIR__ . '/../vendor/autoload.php';
+
+use function App\runGendiff;
+
+runGendiff();

composer.json

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+{
+    "name": "hexlet/code",
+    "description": "Diff generator",
+    "type": "project",
+    "require": {
+        "docopt/docopt": "^1.0.6"
+    },
+    "require-dev": {
+        "squizlabs/php_codesniffer": "^3.7"
+    },
+    "license": "MIT",
+    "autoload": {
+        "psr-4": {
+            "App\\": "src/"
+        },
+        "files": [
+            "vendor/docopt/docopt/src/docopt.php",
+            "src/Gendiff.php"
+        ]
+    },
+    "authors": [
+        {
+            "name": "Alexsey-VR",
+            "email": "[email protected]"
+        }
+    ],
+    "bin": [
+        "bin/gendiff"
+    ]
+}

composer.lock

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+<?php
+
+namespace App;
+
+//require_once __DIR__ . '/../vendor/autoload.php';
+
+use Docopt;
+
+function runGendiff()
+{
+    $doc = <<<'DOCOPT'
+    gendiff -h
+
+    Generate diff
+
+    Usage:
+      gendiff (-h|--help)
+      gendiff (-v|--version)
+
+    Options:
+      -h --help                  Show this screen
+      -v --version               Show version
+
+    DOCOPT;
+
+    $result = Docopt::handle($doc, array('version' => '1.0.6'));
+
+    foreach ($result as $k => $v) {
+        print_r($k . ': ' . json_encode($v) . PHP_EOL);
+    }
+}