From 479223dc56e0fb65f3cc7088b37e22dd6b7da0b0 Mon Sep 17 00:00:00 2001
From: Aki Tuomi <aki.tuomi@open-xchange.com>
Date: Wed, 22 Jan 2020 14:34:15 +0200
Subject: [PATCH] config: Add support for $ENV:name

Expands into given environment variable
---
 src/config/config-parser.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/config/config-parser.c b/src/config/config-parser.c
index aec5359edd..47d0f18fd2 100644
--- a/src/config/config-parser.c
+++ b/src/config/config-parser.c
@@ -821,6 +821,11 @@ static int config_write_keyvariable(struct config_parser_context *ctx,
 			str_append(str, var_name);
 		} else if (!ctx->expand_values && !expand_parent) {
 			str_append(str, var_name);
+		} else if (str_begins(var_name, "$ENV:")) {
+			/* use environment variable */
+			const char *envval = getenv(var_name+5);
+			if (envval != NULL)
+				str_append(str, envval);
 		} else {
 			const char *var_value;
 			enum setting_type var_type;
-- 
2.47.3