Improve reading for default values and prompt

[guile-click.git] / click / util.scm

diff --git a/click/util.scm b/click/util.scm
index 65ad8627e12579b5a8d072638d0db43ed3b65e33..e83e15319a915d16cb43e2ab4cfc14efe207126b 100644 (file)
--- a/click/util.scm
+++ b/click/util.scm
@@ -18,12 +18,18 @@
 
 
 (define-module (click util)
+  #:use-module (ice-9 getopt-long)
+  #:use-module (ice-9 readline)
   #:use-module (click constant)
   #:export (getopt-long-option-spec
+            get-option-default-value
+            get-values
+            option-default-value
             option-property
             program-name
             %program-name))
 
+
 (define %program-name (make-fluid "guile"))
 (define (program-name)
   (fluid-ref %program-name))
@@ -42,3 +48,26 @@
     (if property
         (cadr property)
         default)))
+
+(define (get-values option-spec values)
+  "Return an associated list with values for all the options in option-spec"
+  (cond ((null? option-spec)
+         '())
+        (else
+         (let* ((option (car option-spec))
+                (option-name (car option))
+                (value (or (option-ref values option-name #f)
+                           (get-option-default-value option))))
+           (cons (cons option-name value)
+                 (get-values (cdr option-spec) values))))))
+
+
+(define* (get-option-default-value option #:optional (no-prompt #f))
+  "Get 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)))