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package ExtUtils::PL2Bat;
$ExtUtils::PL2Bat::VERSION = '0.005';
use strict;
use warnings;
use 5.006;
use Config;
use Carp qw/croak/;
# In core, we can't use any other modules except those that already live in
# lib/, so Exporter is not available to us.
sub import {
my ($self, @functions) = @_;
@functions = 'pl2bat' if not @functions;
my $caller = caller;
for my $function (@functions) {
no strict 'refs';
*{"$caller\::$function"} = \&{$function};
}
}
sub pl2bat {
my %opts = @_;
# NOTE: %0 is already enclosed in doublequotes by cmd.exe, as appropriate
$opts{ntargs} = '-x -S %0 %*' unless exists $opts{ntargs};
$opts{otherargs} = '-x -S "%0" %1 %2 %3 %4 %5 %6 %7 %8 %9' unless exists $opts{otherargs};
$opts{stripsuffix} = qr/\.plx?/ unless exists $opts{stripsuffix};
if (not exists $opts{out}) {
$opts{out} = $opts{in};
$opts{out} =~ s/$opts{stripsuffix}$//i;
$opts{out} .= '.bat' unless $opts{in} =~ /\.bat$/i or $opts{in} eq '-';
}
my $head = <<"EOT";
\@rem = '--*-Perl-*--
\@set "ErrorLevel="
\@if "%OS%" == "Windows_NT" \@goto WinNT
\@perl $opts{otherargs}
\@set ErrorLevel=%ErrorLevel%
\@goto endofperl
:WinNT
\@perl $opts{ntargs}
\@set ErrorLevel=%ErrorLevel%
\@if NOT "%COMSPEC%" == "%SystemRoot%\\system32\\cmd.exe" \@goto endofperl
\@if %ErrorLevel% == 9009 \@echo You do not have Perl in your PATH.
\@goto endofperl
\@rem ';
EOT
$head =~ s/^\s+//gm;
my $headlines = 2 + ($head =~ tr/\n/\n/);
my $tail = <<'EOT';
__END__
:endofperl
@set "ErrorLevel=" & @goto _undefined_label_ 2>NUL || @"%COMSPEC%" /d/c @exit %ErrorLevel%
EOT
$tail =~ s/^\s+//gm;
my $linedone = 0;
my $taildone = 0;
my $linenum = 0;
my $skiplines = 0;
my $start = $Config{startperl};
$start = '#!perl' unless $start =~ /^#!.*perl/;
open my $in, '<', $opts{in} or croak "Can't open $opts{in}: $!";
my @file = <$in>;
close $in;
foreach my $line ( @file ) {
$linenum++;
if ( $line =~ /^:endofperl\b/ ) {
if (!exists $opts{update}) {
warn "$opts{in} has already been converted to a batch file!\n";
return;
}
$taildone++;
}
if ( not $linedone and $line =~ /^#!.*perl/ ) {
if (exists $opts{update}) {
$skiplines = $linenum - 1;
$line .= '#line '.(1+$headlines)."\n";
} else {
$line .= '#line '.($linenum+$headlines)."\n";
}
$linedone++;
}
if ( $line =~ /^#\s*line\b/ and $linenum == 2 + $skiplines ) {
$line = '';
}
}
open my $out, '>', $opts{out} or croak "Can't open $opts{out}: $!";
print $out $head;
print $out $start, ( $opts{usewarnings} ? ' -w' : '' ),
"\n#line ", ($headlines+1), "\n" unless $linedone;
print $out @file[$skiplines..$#file];
print $out $tail unless $taildone;
close $out;
return $opts{out};
}
1;
# ABSTRACT: Batch file creation to run perl scripts on Windows
__END__
=pod
=encoding UTF-8
=head1 NAME
ExtUtils::PL2Bat - Batch file creation to run perl scripts on Windows
=head1 VERSION
version 0.005
=head1 OVERVIEW
This module converts a perl script into a batch file that can be executed on Windows/DOS-like operating systems. This is intended to allow you to use a Perl script like regular programs and batch files where you just enter the name of the script [probably minus the extension] plus any command-line arguments and the script is found in your B<PATH> and run.
=head1 FUNCTIONS
=head2 pl2bat(%opts)
This function takes a perl script and write a batch file that contains the script. This is sometimes necessary
=over 8
=item * C<in>
The name of the script that is to be batchified. This argument is mandatory.
=item * C<out>
The name of the output batch file. If not given, it will be generated using C<in> and C<stripsuffix>.
=item * C<ntargs>
Arguments to invoke perl with in generated batch file when run from
Windows NT. Defaults to S<'-x -S %0 %*'>.
=item * C<otherargs>
Arguments to invoke perl with in generated batch file except when
run from Windows NT (ie. when run from DOS, Windows 3.1, or Windows 95).
Defaults to S<'-x -S "%0" %1 %2 %3 %4 %5 %6 %7 %8 %9'>.
=item * C<stripsuffix>
Strip a suffix string from file name before appending a ".bat"
suffix. The suffix is not case-sensitive. It can be a regex or a string and a trailing
C<$> is always assumed). Defaults to C<qr/\.plx?/>.
=item * C<usewarnings>
With the C<usewarnings>
option, C<" -w"> is added after the value of C<$Config{startperl}>.
If a line matching C</^#!.*perl/> already exists in the script,
then it is not changed and the B<-w> option is ignored.
=item * C<update>
If the script appears to have already been processed by B<pl2bat>,
then the script is skipped and not processed unless C<update> was
specified. If C<update> is specified, the existing preamble is replaced.
=back
=head1 ACKNOWLEDGEMENTS
This code was taken from Module::Build and then modified; which had taken it from perl's pl2bat script. This module is an attempt at unifying all three implementations.
=head1 AUTHOR
Leon Timmermans <leont@cpan.org>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2015 by Leon Timmermans.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut