From ca0fa738650ab546b1422e0b2dbfdc89ba8eb5a3 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 6 Apr 2020 16:19:38 +0200
Subject: Add ability to print process_env environment

---
 libbutl/process.mxx | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'libbutl/process.mxx')

diff --git a/libbutl/process.mxx b/libbutl/process.mxx
index 1f378c4..b8c6054 100644
--- a/libbutl/process.mxx
+++ b/libbutl/process.mxx
@@ -494,7 +494,6 @@ LIBBUTL_MODEXPORT namespace butl
     quote_argument (const char*, std::string& buffer);
 #endif
 
-
   public:
     id_type
     id () const;
@@ -548,6 +547,16 @@ LIBBUTL_MODEXPORT namespace butl
     const dir_path*     cwd  = nullptr;
     const char* const*  vars = nullptr;
 
+    // Return true if there is an "environment", that is, either the current
+    // working directory or environment variables.
+    //
+    bool
+    env () const
+    {
+      return (cwd != nullptr && !cwd->empty ()) ||
+             (vars != nullptr && *vars != nullptr);
+    }
+
     process_env (const process_path& p,
                  const dir_path& c = dir_path (),
                  const char* const* v = nullptr)
-- 
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