Update UPGRADING.md

2014-05-20 09:24:31 -07:00
parent 83cfe31f77
commit 5c926c54e2
1 changed files with 2 additions and 2 deletions
--- a/UPGRADING.md
+++ b/UPGRADING.md
@@ -9,10 +9,10 @@ In 1.0, argument validators were a somewhat documented, but unpublished feature

    cmdarg 'x' 'some-arg' 'some description' '' 'echo $OPTARG | grep ...'

-... To this format:
+... To this format, which will work in both 1.0 and 2.0 versions:

    function my_grep_validator {
-        echo $1 | grep ...
+        echo ${1:-$OPTARG} | grep ...
    }

    cmdarg 'x' 'some-arg' 'some description' '' my_grep_validator