Version 0.1.1

README.md

@@ -1,6 +1,8 @@
 # Pharaoh - PHAR diff utility
 
-Display the differences between all of the files in two PHP Archives
+Display the differences between all of the files in two PHP Archives.
+
+Copyright 2015 [Paragon Initiative Enterprises](https://paragonie.com)
 
 ## Set up
 
@@ -11,11 +13,14 @@ ln -s ./pharaoh /usr/bin/pharaoh
 ## Example
 
 ```sh
-pharaoh composer-downloaded.phar composer-from-soruce.phar
+pharaoh composer.phar composer-from-source.phar
 ```
 
 ## Why?
 
 As part of our [ASGard](https://getasgard.com) project, we must verify the
 reproducibility of software deliverables. This means building a .phar from
 source and comparing it to the one provided by the vendor.
+
+There wasn't already a simple command line utility for examining the differences
+between two .phar files, so our CDO wrote this as a proof of concept.

src/Pharaoh.php

@@ -6,12 +6,19 @@ class Pharaoh
     public $phar;
     public $tmp;
 
-    public function __construct($file, $alias)
+    public function __construct($file, $alias = null)
     {
         if (!\is_readable($file)) {
             throw new PharError($file.' cannot be read');
         }
         $this->phar = new \Phar($file);
+
+        if (empty($alias)) {
+            // We have to give every one a different alias, or it pukes.
+            $alias = \base64_encode(
+                \mcrypt_create_iv(9, MCRYPT_DEV_URANDOM)
+            ).'.phar';
+        }
         $this->phar->setAlias($alias);
 
         // Make a random folder in /tmp