perl 5.18.2-2ubuntu1 / usr / bin / pl2pm

#!/usr/bin/perl
    eval 'exec /usr/bin/perl -S $0 ${1+"$@"}'
	if $running_under_some_shell;

=head1 NAME

pl2pm - Rough tool to translate Perl4 .pl files to Perl5 .pm modules.

=head1 SYNOPSIS

B<pl2pm> F<files>

=head1 DESCRIPTION

B<pl2pm> is a tool to aid in the conversion of Perl4-style .pl
library files to Perl5-style library modules.  Usually, your old .pl
file will still work fine and you should only use this tool if you
plan to update your library to use some of the newer Perl 5 features,
such as AutoLoading.

=head1 LIMITATIONS

It's just a first step, but it's usually a good first step.

=head1 AUTHOR

Larry Wall <larry@wall.org>

=cut

use strict;
use warnings;

my %keyword = ();

while (<DATA>) {
    chomp;
    $keyword{$_} = 1;
}

local $/;

while (<>) {
    my $newname = $ARGV;
    $newname =~ s/\.pl$/.pm/ || next;
    $newname =~ s#(.*/)?(\w+)#$1\u$2#;
    if (-f $newname) {
	warn "Won't overwrite existing $newname\n";
	next;
    }
    my $oldpack = $2;
    my $newpack = "\u$2";
    my @export = ();

    s/\bstd(in|out|err)\b/\U$&/g;
    s/(sub\s+)(\w+)(\s*\{[ \t]*\n)\s*package\s+$oldpack\s*;[ \t]*\n+/${1}main'$2$3/ig;
    if (/sub\s+\w+'/) {
	@export = m/sub\s+\w+'(\w+)/g;
	s/(sub\s+)main'(\w+)/$1$2/g;
    }
    else {
	@export = m/sub\s+([A-Za-z]\w*)/g;
    }
    my @export_ok = grep($keyword{$_}, @export);
    @export = grep(!$keyword{$_}, @export);

    my %export = ();
    @export{@export} = (1) x @export;

    s/(^\s*);#/$1#/g;
    s/(#.*)require ['"]$oldpack\.pl['"]/$1use $newpack/;
    s/(package\s*)($oldpack)\s*;[ \t]*\n+//ig;
    s/([\$\@%&*])'(\w+)/&xlate($1,"",$2,$newpack,$oldpack,\%export)/eg;
    s/([\$\@%&*]?)(\w+)'(\w+)/&xlate($1,$2,$3,$newpack,$oldpack,\%export)/eg;
    if (!/\$\[\s*\)?\s*=\s*[^0\s]/) {
	s/^\s*(local\s*\()?\s*\$\[\s*\)?\s*=\s*0\s*;[ \t]*\n//g;
	s/\$\[\s*\+\s*//g;
	s/\s*\+\s*\$\[//g;
	s/\$\[/0/g;
    }
    s/open\s+(\w+)/open($1)/g;
 
    my $export_ok = '';
    my $carp      ='';


    if (s/\bdie\b/croak/g) {
	$carp = "use Carp;\n";
	s/croak "([^"]*)\\n"/croak "$1"/g;
    }

    if (@export_ok) {
	$export_ok = "\@EXPORT_OK = qw(@export_ok);\n";
    }

    if ( open(PM, ">$newname") ) {
        print PM <<"END";
package $newpack;
use 5.006;
require Exporter;
$carp
\@ISA = qw(Exporter);
\@EXPORT = qw(@export);
$export_ok
$_
END
    }
    else {
      warn "Can't create $newname: $!\n";
    }
}

sub xlate {
    my ($prefix, $pack, $ident,$newpack,$oldpack,$export) = @_;

    my $xlated ;
    if ($prefix eq '' && $ident =~ /^(t|s|m|d|ing|ll|ed|ve|re)$/) {
	$xlated = "${pack}'$ident";
    }
    elsif ($pack eq '' || $pack eq 'main') {
	if ($export->{$ident}) {
	    $xlated = "$prefix$ident";
	}
	else {
	    $xlated = "$prefix${pack}::$ident";
	}
    }
    elsif ($pack eq $oldpack) {
	$xlated = "$prefix${newpack}::$ident";
    }
    else {
	$xlated = "$prefix${pack}::$ident";
    }

    return $xlated;
}
__END__
AUTOLOAD
BEGIN
CHECK
CORE
DESTROY
END
INIT
UNITCHECK
abs
accept
alarm
and
atan2
bind
binmode
bless
caller
chdir
chmod
chomp
chop
chown
chr
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close
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cmp
connect
continue
cos
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dbmclose
dbmopen
defined
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each
else
elsif
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eof
eq
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fork
format
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ge
getc
getgrent
getgrgid
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gethostbyaddr
gethostbyname
gethostent
getlogin
getnetbyaddr
getnetbyname
getnetent
getpeername
getpgrp
getppid
getpriority
getprotobyname
getprotobynumber
getprotoent
getpwent
getpwnam
getpwuid
getservbyname
getservbyport
getservent
getsockname
getsockopt
glob
gmtime
goto
grep
gt
hex
if
index
int
ioctl
join
keys
kill
last
lc
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le
length
link
listen
local
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lock
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lt
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map
mkdir
msgctl
msgget
msgrcv
msgsnd
my
ne
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no
not
oct
open
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or
ord
our
pack
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pipe
pop
pos
print
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push
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qr
quotemeta
qw
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readpipe
recv
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reverse
rewinddir
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rmdir
s
scalar
seek
seekdir
select
semctl
semget
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setnetent
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setsockopt
shift
shmctl
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socketpair
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syswrite
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tie
tied
time
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tr
truncate
uc
ucfirst
umask
undef
unless
unlink
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unshift
untie
until
use
utime
values
vec
wait
waitpid
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warn
while
write
x
xor
y