imported env module

env/boolean.go

@@ -0,0 +1,35 @@
+package env
+
+import (
+	"os"
+	"strings"
+)
+
+// Get an environment variable as a boolean, specifying a default value if its
+// not set or can't be parsed properly into a bool
+func Bool(key string, defaultValue bool) bool {
+	val, exists := os.LookupEnv(key)
+	if !exists {
+		return defaultValue
+	}
+	truthy := map[string]bool{
+		"true": true, "t": true, "yes": true, "y": true, "on": true, "1": true,
+		"enable": true, "enabled": true, "active": true, "affirmative": true,
+	}
+
+	falsy := map[string]bool{
+		"false": false, "f": false, "no": false, "n": false, "off": false, "0": false,
+		"disable": false, "disabled": false, "inactive": false, "negative": false,
+	}
+
+	normalized := strings.TrimSpace(strings.ToLower(val))
+
+	if val, ok := truthy[normalized]; ok {
+		return val
+	}
+	if val, ok := falsy[normalized]; ok {
+		return val
+	}
+
+	return defaultValue
+}