# from Curtis Jewell
# on Friday 20 March 2009 14:46:
> I have a configure_requires on
>Win32API::Registry 0.30 for the systems that support
> configure_requires, but for those that don't, I want to delay
> checking for my software until after prerequisites are checked and
> Win32API::Registry installed.
One suggestion:
If you have configure_requires, your check can run at Build.PL time, so
set $builder->notes(has_registry => 1) there.
Then, override ACTION_code() to perform a backup check if has_registry
is false. This is probably also a good time to actually download and
install the external stuff. Then call SUPER::ACTION_code().
But you want to prompt only at Build.PL time, so if configure_requires
is unsatisfied, you might want to print the error "I can't check for
myself without Win32API::Registry." (Because there's a good chance
you'll be asking them if they want to install something they already
have -- which would be confusing.)
From your current code, this implies factoring out the variables to
allow the check to be repeated without prompting during ./Build.
--Eric
--
"Beware of bugs in the above code; I have only proved it correct, not
tried it."
--Donald Knuth
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