From c307b302f749f59c24fdd483acb32480571194b2 Mon Sep 17 00:00:00 2001
From: Refael Ackermann <refack@gmail.com>
Date: Sun, 14 May 2017 11:58:13 -0400
Subject: [PATCH] doc: blorb about setting `npm_config_OPTION_NAME`

PR-URL: https://github.com/nodejs/node-gyp/pull/1185
Fixes: https://github.com/nodejs/node-gyp/issues/1180
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
---
 README.md | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/README.md b/README.md
index d5443080dd..03db320900 100644
--- a/README.md
+++ b/README.md
@@ -192,6 +192,23 @@ Command Options
 | `--solution=$solution`            | Set Visual Studio Solution version (win)
 
 
+Configuration
+--------
+
+__`node-gyp` responds to environment variables or `npm` configuration__
+1. Environment variables take the form `npm_config_OPTION_NAME` for any of the 
+ options listed above (dashes in option names should be replaced by underscores).
+ These work also when `node-gyp` is invoked directly:  
+ `$ export npm_config_devdir=/tmp/.gyp`  
+ or on Windows  
+ `> set npm_config_devdir=c:\temp\.gyp`  
+2. As `npm` configuration, variables take the form `OPTION_NAME`.
+ This way only works when `node-gyp` is executed by `npm`:  
+ `$ npm config set [--global] devdir /tmp/.gyp`  
+ `$ npm i buffertools`
+ 
+
+
 License
 -------