Add Pharaoh to Box (#238)

Add [Pharaoh](https://github.com/paragonie/pharaoh) to provide a new `diff` command

Closes #209

README.md

@@ -23,7 +23,7 @@ great things:
 - ⚙️ Zero configuration by default
 - 🚔 [Requirements checker](doc/requirement-checker.md#requirements-checker)
 - 🚨 Friendly error logging experience 
-- 🔍 Retrieve information about the PHAR extension or a PHAR file and its contents (`box info`)
+- 🔍 Retrieve information about the PHAR extension or a PHAR file and its contents (`box info` or `box diff`)
 - 🕵️‍♀️ Verify the signature of an existing PHAR (`box verify`)
 - 📝 Use Git tags and short commit hashes for versioning
 

bar.php

@@ -0,0 +1,4 @@
+<?php
+
+echo "Hello world!";
+

composer.json

@@ -51,6 +51,7 @@
         "humbug/php-scoper": "dev-master#c0384b6",
         "justinrainbow/json-schema": "^5.2",
         "nikic/iter": "^1.6",
+        "paragonie/pharaoh": "^0.3.1",
         "phpseclib/phpseclib": "~2.0",
         "seld/jsonlint": "^1.6",
         "symfony/console": "^3.4 || ^4.0",

fixtures/diff/not-a-phar.phar

@@ -0,0 +1,2 @@
+This file is not a real PHAR file! Fake!
+

scoper.inc.php

@@ -98,6 +98,42 @@ function (string $filePath, string $prefix, string $contents): string {
                 $contents
             );
         },
+        function (string $filePath, string $prefix, string $contents): string {
+            if ('vendor/paragonie/sodium_compat/autoload.php' !== $filePath) {
+                return $contents;
+            }
+
+            return preg_replace(
+                '/\'sodiumCompatAutoloader\'/',
+                sprintf(
+                    '\'%s\\%s\'',
+                    $prefix,
+                    'sodiumCompatAutoloader'
+                ),
+                preg_replace(
+                    '/\$namespace = \'ParagonIE_Sodium_\';/',
+                    sprintf(
+                        '$namespace = \'%s\\ParagonIE_Sodium_\';',
+                        $prefix
+                    ),
+                    $contents
+                )
+            );
+        },
+        function (string $filePath, string $prefix, string $contents): string {
+            if ('vendor/paragonie/sodium_compat/lib/php72compat.php' !== $filePath) {
+                return $contents;
+            }
+
+            return preg_replace(
+                '/\\\\define\\("SODIUM_{\\$constant}", \\\\constant\\("ParagonIE_Sodium_Compat::{\\$constant}"\\)\\);/',
+                sprintf(
+                    '\define("SODIUM_{$constant}", \constant("%s\\ParagonIE_Sodium_Compat::{$constant}"));',
+                    $prefix
+                ),
+                $contents
+            );
+        },
     ],
     'whitelist' => [
         \Composer\Autoload\ClassLoader::class,

src/Console/Application.php

@@ -76,6 +76,7 @@ protected function getDefaultCommands(): array
 
         $commands[] = new Command\Build();
         $commands[] = new Command\Compile();
+        $commands[] = new Command\Diff();
         $commands[] = new Command\Info();
         $commands[] = new Command\Validate();
         $commands[] = new Command\Verify();