Add a --write and --diff flag; require --write to be set before making any changes, for safety

tesseract/genconf/key.go

@@ -12,7 +12,12 @@ import (
 	"path/filepath"
 )
 
-func generateKeys(yamlFile string) {
+func generateKeys(yamlFile string, wantDiff bool, allowWrite bool, useColor bool) {
+	if !allowWrite {
+		fmt.Printf("Key generation requires --write flag\n")
+		return
+	}
+
 	config := loadConfig(yamlFile)
 
 	// Generate keys for each log