Handle config options

internal/config/env.go

@@ -0,0 +1,21 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"strings"
+)
+
+// parseEnvironmentVariables analyzes all the environment variables to find
+// each one starting by REPEATER_
+func parseEnvironmentVariables(o *Config) (err error) {
+	for _, line := range os.Environ() {
+		if strings.HasPrefix(line, "REPEATER_") {
+			err := parseLine(o, line)
+			if err != nil {
+				return fmt.Errorf("error in environment (%q): %w", line, err)
+			}
+		}
+	}
+	return
+}