From 481f9ba1aee62fea092184f2243d210a8686781f Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 14 Jun 2018 18:13:04 +0200
Subject: Add portable environment variable manipulation functions

---
 libbutl/utility.ixx | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'libbutl/utility.ixx')

diff --git a/libbutl/utility.ixx b/libbutl/utility.ixx
index d4aaa65..565a694 100644
--- a/libbutl/utility.ixx
+++ b/libbutl/utility.ixx
@@ -2,6 +2,10 @@
 // copyright : Copyright (c) 2014-2018 Code Synthesis Ltd
 // license   : MIT; see accompanying LICENSE file
 
+#ifndef __cpp_lib_modules
+#include <cstdlib> // getenv()
+#endif
+
 namespace butl
 {
   inline char
@@ -199,4 +203,13 @@ namespace butl
 
     throw std::istream::failure ("");
   }
+
+  inline optional<std::string>
+  getenv (const std::string& name)
+  {
+    if (const char* r = std::getenv (name.c_str ()))
+      return std::string (r);
+
+    return nullopt;
+  }
 }
-- 
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