Add env module

1 files changed, 10 insertions, 0 deletions

diff --git a/src/env.rs b/src/env.rs
new file mode 100644
index 00000000..60158b85
--- /dev/null
+++ b/src/env.rs
@@ -0,0 +1,10 @@
+use std::env;
+
+/// If key is set and, after trimming whitespace, is not empty string, then return that trimmed
+/// string. Else None.
+pub fn get_env_var(key: &str) -> Option<String> {
+    match env::var(key).unwrap_or("".to_string()).trim() {
+        "" => None,
+        non_empty_string => Some(non_empty_string.to_string()),
+    }
+}