First commit.

lisp/lib/env.el

@@ -0,0 +1,13 @@
+;;; env.el --- support functions for working with environment variables -*- lexical-binding: t; -*-
+;;; Commentary:
+;;; Code:
+
+(defun getenv-or (env value)
+  "Fetch the value of ENV or, if it is not set, return VALUE."
+  (if (getenv env)
+      (getenv env)
+    value))
+
+
+(provide 'lib/env)
+;;; env.el ends here