From 82c89d40cc6cd0100b4c68e72f869ff007f4ef36 Mon Sep 17 00:00:00 2001
From: Sadie Powell <sadie@witchery.services>
Date: Thu, 20 Feb 2020 18:02:51 +0000
Subject: [PATCH] Add support for using environment variables in the config.

---
 src/configparser.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/configparser.cpp b/src/configparser.cpp
index 0102c910c..6fdc56c32 100644
--- a/src/configparser.cpp
+++ b/src/configparser.cpp
@@ -205,7 +205,7 @@ struct Parser
 				while (1)
 				{
 					ch = next();
-					if (isalnum(ch) || (varname.empty() && ch == '#'))
+					if (isalnum(ch) || (varname.empty() && ch == '#') || ch == '.')
 						varname.push_back(ch);
 					else if (ch == ';')
 						break;
@@ -233,6 +233,13 @@ struct Parser
 						throw CoreException("Invalid numeric character reference '&" + varname + ";'");
 					value.push_back(static_cast<char>(lvalue));
 				}
+				else if (varname.compare(0, 4, "env.") == 0)
+				{
+					const char* envstr = getenv(varname.c_str() + 4);
+					if (!envstr)
+						throw CoreException("Undefined XML environment entity reference '&" + varname + ";'");
+					value.append(envstr);
+				}
 				else
 				{
 					insp::flat_map<std::string, std::string>::iterator var = stack.vars.find(varname);
-- 
2.39.5