imapsync/W/learn/bug_io_prompter_local_ARGV

#!/usr/bin/perl

use strict;
use warnings;
use IO::Prompter;

# The defect is when used with a pipe, like the following on the command line example,
# prompt() does not print the prompt string 'Say something: '
# however the variable @ARGV is locally empty.
# The output is then only:
#
# $ echo bla bla bla | ./bug_io_prompt_local_ARGV param1 param2
# ARGV are param1 param2
# You said: bla bla bla

# I tried also 
# prompt( \*STDOUT, 'Say something: ');

# The behavior is ok without the pipe:
# ./bug_io_prompt_local_ARGV param1 param2

# echo input | { echo -n "prompt: " ; read stdin ; echo "got $stdin" ; }
# { echo -n "prompt: " ; read stdin ; echo "got $stdin" ; }


print "$IO::Prompter::VERSION\n" ;
print "ARGV are @ARGV\n" ;

my $input = get_stdin();

print "You said: $input\n" ;

sub get_stdin
{
        #local(@ARGV) ;
        my $prompt = 'Say something: ' ;
        my $input = prompt(
                -prompt  => $prompt,
                -echo    => '*',
                -in  => *STDIN,
                -out => *STDOUT,
        );
        return $input ;
}