opts: added possibility to hide an option from the usage (easter egg?)

[nit.git] / lib / opts.nit

diff --git a/lib/opts.nit b/lib/opts.nit
index 97a2a1f..20bf42f 100644 (file)
--- a/lib/opts.nit
+++ b/lib/opts.nit
@@ -31,6 +31,9 @@ abstract class Option
        # Is this option mandatory?
        var mandatory: Bool writable = false
 
+       # Is this option hidden from `usage`?
+       var hidden: Bool writable = false
+
        # Has this option been read?
        var read: Bool writable = false
 
@@ -276,9 +279,11 @@ class OptionContext
                        end
                        if lmax < l then lmax = l
                end
-               
+
                for i in options do
-                       print(i.pretty(lmax))
+                       if not i.hidden then
+                               print(i.pretty(lmax))
+                       end
                end
        end