From 14b50c7c457dcbf0d445faaadd0cdc9f36aed7d7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?St=C3=A9phane=20Goetz?= <onigoetz@onigoetz.ch>
Date: Wed, 21 Sep 2016 23:10:10 +0200
Subject: [PATCH] Handle absolute paths, fixes #407

---
 libs/Daux.php       | 19 ++++++++++++++++---
 libs/DauxHelper.php | 34 ++++++++++++++++++++++++++++++++--
 2 files changed, 48 insertions(+), 5 deletions(-)

diff --git a/libs/Daux.php b/libs/Daux.php
index 3421f30..65e74eb 100644
--- a/libs/Daux.php
+++ b/libs/Daux.php
@@ -73,7 +73,9 @@ class Daux
         $params = $this->getParams();
 
         // Validate and set theme path
-        $params->setDocumentationDirectory($docs_path = $this->normalizeDocumentationPath());
+        $params->setDocumentationDirectory(
+            $docs_path = $this->normalizeDocumentationPath($this->getParams()->getDocumentationDirectory())
+        );
 
         // Read documentation overrides
         $this->loadConfiguration($docs_path . DIRECTORY_SEPARATOR . 'config.json');
@@ -109,6 +111,10 @@ class Daux
         }
 
         if (file_exists($override_file)) {
+            if (DauxHelper::isAbsolutePath($override_file)) {
+                return $override_file;
+            }
+
             return getcwd() . '/' . $override_file;
         }
 
@@ -129,6 +135,10 @@ class Daux
         }
 
         if (is_dir($path)) {
+            if (DauxHelper::isAbsolutePath($path)) {
+                return $path;
+            }
+
             return getcwd() . '/' . $path;
         }
 
@@ -140,7 +150,7 @@ class Daux
         throw new Exception('The Themes directory does not exist. Check the path again : ' . $path);
     }
 
-    public function normalizeDocumentationPath()
+    public function normalizeDocumentationPath($path)
     {
         // When running through `daux --serve` we set an environment variable to know where we started from
         $env = getenv('DAUX_SOURCE');
@@ -148,8 +158,11 @@ class Daux
             return $env;
         }
 
-        $path = $this->getParams()->getDocumentationDirectory();
         if (is_dir($path)) {
+            if (DauxHelper::isAbsolutePath($path)) {
+                return $path;
+            }
+
             return getcwd() . '/' . $path;
         }
 
diff --git a/libs/DauxHelper.php b/libs/DauxHelper.php
index e6864d2..afd6ba8 100644
--- a/libs/DauxHelper.php
+++ b/libs/DauxHelper.php
@@ -24,7 +24,7 @@ class DauxHelper
         $config['image'] = str_replace('<base_url>', $base_url, $config['image']);
     }
 
-    public static function resolveVariant(Config $params)
+    protected static function resolveVariant(Config $params)
     {
         if (array_key_exists('theme-variant', $params['html'])) {
             return;
@@ -54,7 +54,7 @@ class DauxHelper
      * @param string $current_url
      * @return array
      */
-    public static function getTheme(Config $params, $current_url)
+    protected static function getTheme(Config $params, $current_url)
     {
         self::resolveVariant($params);
 
@@ -438,4 +438,34 @@ class DauxHelper
 
         return implode('/', $relPath);
     }
+
+    public static function isAbsolutePath($path)
+    {
+        if (!is_string($path)) {
+            $mess = sprintf('String expected but was given %s', gettype($path));
+            throw new \InvalidArgumentException($mess);
+        }
+
+        if (!ctype_print($path)) {
+            $mess = 'Path can NOT have non-printable characters or be empty';
+            throw new \DomainException($mess);
+        }
+
+        // Optional wrapper(s).
+        $regExp = '%^(?<wrappers>(?:[[:print:]]{2,}://)*)';
+
+        // Optional root prefix.
+        $regExp .= '(?<root>(?:[[:alpha:]]:/|/)?)';
+
+        // Actual path.
+        $regExp .= '(?<path>(?:[[:print:]]*))$%';
+
+        $parts = [];
+        if (!preg_match($regExp, $path, $parts)) {
+            $mess = sprintf('Path is NOT valid, was given %s', $path);
+            throw new \DomainException($mess);
+        }
+
+        return '' !== $parts['root'];
+    }
 }