perl5.000 patch.0l: MakeMaker 4.085 and upgrade Configure to dist3 PL 51.

[perl5.git] / pl2pm

#!/usr/bin/perl

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

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

    s/(sub\s+)(\w+)(\s*\{[ \t]*\n)\s*package\s+$oldpack\s*;[ \t]*\n+/${1}main'$2$3/ig;
    if (/sub\s+main'/) {
	@export = m/sub\s+main'(\w+)/g;
	s/(sub\s+)main'(\w+)/$1$2/g;
    }
    else {
	@export = m/sub\s+([A-Za-z]\w*)/g;
    }
    @export_ok = grep($keyword{$_}, @export);
    @export = grep(!$keyword{$_}, @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)/eg;
    s/([\$\@%&*]?)(\w+)'(\w+)/&xlate($1,$2,$3)/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;
 
    if (s/\bdie\b/croak/g) {
	$carp = "use Carp;\n";
	s/croak "([^"]*)\\n"/croak "$1"/g;
    }
    else {
	$carp = "";
    }
    if (@export_ok) {
	$export_ok = "\@EXPORT_OK = qw(@export_ok);\n";
    }
    else {
	$export_ok = "";
    }

    open(PM, ">$newname") || warn "Can't create $newname: $!\n";
    print PM <<"END";
package $newpack;
require 5.000;
require Exporter;
$carp
\@ISA = qw(Exporter);
\@EXPORT = qw(@export);
$export_ok
$_
END
}

sub xlate {
    local($prefix, $pack, $ident) = @_;
    if ($prefix eq '' && $ident =~ /^(t|s|m|d|ing|ll|ed|ve|re)$/) {
	"${pack}'$ident";
    }
    elsif ($pack eq "" || $pack eq "main") {
	if ($export{$ident}) {
	    "$prefix$ident";
	}
	else {
	    "$prefix${pack}::$ident";
	}
    }
    elsif ($pack eq $oldpack) {
	"$prefix${newpack}::$ident";
    }
    else {
	"$prefix${pack}::$ident";
    }
}
__END__
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BEGIN
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