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#-*- perl -*-
#
# Copyright (C) 2001 Ken'ichi Fukamachi
# All rights reserved. This program is free software; you can
# redistribute it and/or modify it under the same terms as Perl itself.
#
# $FML: Convert.pm,v 1.3 2001/12/22 09:21:05 fukachan Exp $
#
package FML::Config::Convert;
use strict;
use vars qw(@ISA @EXPORT @EXPORT_OK $AUTOLOAD);
use Carp;
=head1 NAME
FML::Config::Convert -- variable expansion for __variable__
=head1 SYNOPSIS
my $in = new FileHandle $src;
my $out = new FileHandle "> $dst.$$";
if (defined $in && defined $out) {
chmod 0644, "$dst.$$";
&FML::Config::Convert::convert($in, $out, $config);
$out->close();
$in->close();
rename("$dst.$$", $dst) || croak("fail to rename $dst");
}
else {
croak("fail to open $src") unless defined $in;
croak("fail to open $dst") unless defined $out;
}
=head1 DESCRIPTION
Installer needs variable expansion. This module provides variable
expansion for __variable__ style string.
=head1 METHODS
=head2 convert($in, $out, $config)
conversion filter. The source is given by file handle $in,
output is specified as file handle $out.
Specify HASH_REF $config as real value.
=cut
# Descriptions: conversion filter.
# Arguments: HANDLE($in) HANDLE($out) HASH_REF($config)
# Side Effects: print out to handle $out
# Return Value: none
sub convert
{
my ($in, $out, $config) = @_;
if (defined $in && defined $out && defined $config) {
while (<$in>) {
$_ = _replace($_, $config) if /__/;
print $out $_;
}
}
else {
croak("convert: invalid in/out channel");
}
}
# Descriptions: replace __variable__ with real value in $config
# Arguments: STR($buf) HASH_REF($config)
# Side Effects: buffer replacement
# Return Value: STR($buf)
sub _replace
{
my ($buf, $config) = @_;
if (defined $config->{ ml_name }) {
$buf =~ s/__ml_name__/$config->{ ml_name }/g;
}
if (defined $config->{ ml_domain }) {
$buf =~ s/__ml_domain__/$config->{ ml_domain }/g;
}
if (defined $config->{ libexec_dir }) {
$buf =~ s/__libexec_dir__/$config->{ libexec_dir }/g;
}
if (defined $config->{ ml_home_prefix }) {
$buf =~ s/__ml_home_prefix__/$config->{ ml_home_prefix }/g;
}
if (defined $config->{ executable_prefix }) {
$buf =~ s/__executable_prefix__/$config->{ executable_prefix }/g;
}
return $buf;
}
=head1 AUTHOR
Ken'ichi Fukamachi
=head1 COPYRIGHT
Copyright (C) 2001 Ken'ichi Fukamachi
All rights reserved. This program is free software; you can
redistribute it and/or modify it under the same terms as Perl itself.
=head1 HISTORY
FML::Config::Convert appeared in fml5 mailing list driver package.
See C<http://www.fml.org/> for more details.
=cut
1;
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