From f9d07229b42bc16310b708d2508a1b4788f573ac Mon Sep 17 00:00:00 2001
From: XMRig <support@xmrig.com>
Date: Mon, 23 Dec 2019 00:28:57 +0700
Subject: [PATCH] Add extra variables.

---
 src/base/kernel/Env.cpp | 29 ++++++++++++++++++++++++++++-
 src/base/kernel/Env.h   |  2 +-
 2 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/src/base/kernel/Env.cpp b/src/base/kernel/Env.cpp
index fd95270d..0be0480e 100644
--- a/src/base/kernel/Env.cpp
+++ b/src/base/kernel/Env.cpp
@@ -24,6 +24,8 @@
 
 
 #include "base/kernel/Env.h"
+#include "base/kernel/Process.h"
+#include "version.h"
 
 
 #include <regex>
@@ -44,6 +46,23 @@
 #endif
 
 
+namespace xmrig {
+
+
+static std::map<String, String> variables;
+
+
+static void createVariables()
+{
+    variables.insert({ "XMRIG_VERSION", APP_VERSION });
+    variables.insert({ "XMRIG_EXE_DIR", Process::location(Process::ExeLocation, "") });
+    variables.insert({ "XMRIG_CWD",     Process::location(Process::CwdLocation, "") });
+}
+
+
+} // namespace xmrig
+
+
 xmrig::String xmrig::Env::expand(const char *in)
 {
     if (in == nullptr) {
@@ -86,8 +105,16 @@ xmrig::String xmrig::Env::expand(const char *in)
 }
 
 
-xmrig::String xmrig::Env::get(const char *name)
+xmrig::String xmrig::Env::get(const String &name)
 {
+    if (variables.empty()) {
+        createVariables();
+    }
+
+    if (variables.count(name)) {
+        return variables.at(name);
+    }
+
     return static_cast<const char *>(getenv(name));
 }
 
diff --git a/src/base/kernel/Env.h b/src/base/kernel/Env.h
index 449376b6..2f33abf9 100644
--- a/src/base/kernel/Env.h
+++ b/src/base/kernel/Env.h
@@ -36,7 +36,7 @@ class Env
 {
 public:
     static String expand(const char *in);
-    static String get(const char *name);
+    static String get(const String &name);
     static String hostname();
 };