X-Git-Url: https://git.jsancho.org/?p=guile-click.git;a=blobdiff_plain;f=click%2Futil.scm;fp=click%2Futil.scm;h=4fc80bad05526d47a2a0f8ed22dc02e7ef3d27fe;hp=65ad8627e12579b5a8d072638d0db43ed3b65e33;hb=a2c12dede99c0d296194699e025a2e541c8a98a0;hpb=7bb66a7166059976c81aef6e76f205c14b45cc45

diff --git a/click/util.scm b/click/util.scm
index 65ad862..4fc80ba 100644
--- a/click/util.scm
+++ b/click/util.scm
@@ -18,8 +18,10 @@
 
 
 (define-module (click util)
+  #:use-module (ice-9 readline)
   #:use-module (click constant)
   #:export (getopt-long-option-spec
+            option-default-value
             option-property
             program-name
             %program-name))
@@ -42,3 +44,13 @@
     (if property
         (cadr property)
         default)))
+
+(define* (option-default-value option #:optional (no-prompt #f))
+  "Get default value for option, asking user if prompt property is set"
+  (let ((default (option-property option 'default)))
+    (if (not default)
+        (let ((prompt (option-property option 'prompt)))
+          (if prompt
+              (readline (format #f "~a: " prompt))
+              default))
+        default)))