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#!/usr/bin/perl -w
#========================================================================
#
# tpage
#
# DESCRIPTION
#   Script for processing and rendering a template document using the 
#   Perl Template Toolkit. 
#
# AUTHOR
#   Andy Wardley   <abw@kfs.org>
#
# COPYRIGHT
#   Copyright (C) 1996-2000 Andy Wardley.  All Rights Reserved.
#   Copyright (C) 1998-2000 Canon Research Centre Europe Ltd.
#
#   This module is free software; you can redistribute it and/or
#   modify it under the same terms as Perl itself.
#
#------------------------------------------------------------------------
#
# $Id$
#
#========================================================================

use strict;
use Template;
use Template::Directive;
use AppConfig;

my $NAME     = "tpage";
my $VERSION  = 2.70;
my $HOME     = $ENV{ HOME } || '';
my $RCFILE   = $ENV{"\U${NAME}rc"} || "$HOME/.${NAME}rc";
my $TTMODULE = 'Template';

# read .tpagerc file and any command line arguments
my $config   = read_config($RCFILE);

# unshift any perl5lib directories onto front of INC
unshift(@INC, @{ $config->perl5lib });

# get all template_directive_* options from the config
my %ttdirectiveopts = $config->varlist('^template_directive_', 1);

# get all template_* (except template_directive_*) options from the config and fold keys to UPPER CASE
my %ttopts   = $config->varlist('^template_(?!directive_)', 1);
my $ttmodule = delete($ttopts{ module });
my $ttenvvars = delete($ttopts{ envvars });
my $ucttopts = {
    map { my $v = $ttopts{ $_ }; defined $v ? (uc $_, $v) : () }
    keys %ttopts,
};

# load custom template module 
if ($ttmodule) {
    my $ttpkg = $ttmodule;
    $ttpkg =~ s[::][/]g;
    $ttpkg .= '.pm';
    require $ttpkg;
}
else {
    $ttmodule = $TTMODULE;
}

# load custom Template::Directive configuration
map {
  my $v = $ttdirectiveopts{ $_ };
  if( defined $v ) {
    ${ $Template::Directive::{ uc $_ } } = $ttdirectiveopts{ $_ }
  }
} keys %ttdirectiveopts;

# add current directory to INCLUDE_PATH
unshift(@{ $ucttopts->{ INCLUDE_PATH } }, '.');

# read from STDIN if no files specified
push(@ARGV, '-') unless @ARGV;

my $template = $ttmodule->new($ucttopts)
    || die $ttmodule->error();

my %ttvars = ();
if ($ttenvvars) {
    $ttvars{'env'} = \%ENV;
}

# process each input file 
foreach my $file (@ARGV) {
    $file = \*STDIN if $file eq '-';
    $template->process($file,\%ttvars)
	|| die $template->error();
}


sub read_config {
    my $file = shift;

    my $config = AppConfig->new(
        { 
            ERROR  => sub { die(@_, "\ntry `$NAME --help'\n") }
        }, 
        'help|h'      => { ACTION => \&help },
        'template_absolute|absolute' => { DEFAULT => 1 },
        'template_relative|relative' => { DEFAULT => 1 },
        'template_module|module=s',
        'template_anycase|anycase',
        'template_eval_perl|eval_perl',
        'template_load_perl|load_perl',
        'template_interpolate|interpolate',
        'template_pre_chomp|pre_chomp|prechomp',
        'template_post_chomp|post_chomp|postchomp',
        'template_trim|trim',
        'template_variables|variables|define=s%',
        'template_include_path|include_path|include|I=s@',
        'template_pre_process|pre_process|preprocess=s@',
        'template_post_process|post_process|postprocess=s@',
        'template_process|process=s',
        'template_wrapper|wrapper=s',
        'template_recursion|recursion',
        'template_expose_blocks|expose_blocks',
        'template_default|default=s',
        'template_error|error=s',
        'template_debug|debug=s',
        'template_start_tag|start_tag|starttag=s',
        'template_end_tag|end_tag|endtag=s',
        'template_tag_style|tag_style|tagstyle=s',
        'template_compile_ext|compile_ext=s',
        'template_compile_dir|compile_dir=s',
        'template_plugin_base|plugin_base|pluginbase=s@',
        'perl5lib|perllib=s@',
        'template_envvars|envvars',
        'template_directive_debug',
        'template_directive_pretty',
        'template_directive_while_max|while_max=i'
    );

    # add the 'file' option now that we have a $config object that we 
    # can reference in a closure
    $config->define(
        'file|f=s@' => { 
            EXPAND => AppConfig::EXPAND_ALL, 
            ACTION => sub { 
                my ($state, $item, $file) = @_;
                $file = $state->cfg . "/$file" 
                    unless $file =~ /^[\.\/]|(?:\w:)/;
                $config->file($file) }  
        }
    );

    # process main config file, then command line args
    $config->file($file) if -f $file;
    $config->args();
    return $config;
}


sub help {
    print<<END_OF_HELP;
$NAME $VERSION (Template Toolkit version $Template::VERSION)

usage: $NAME [options] [files]

Options:
   --define var=value       Define template variable
   --interpolate            Interpolate '\$var' references in text
   --anycase                Accept directive keywords in any case.
   --pre_chomp              Chomp leading whitespace 
   --post_chomp             Chomp trailing whitespace
   --trim                   Trim blank lines around template blocks
   --eval_perl              Evaluate [% PERL %] ... [% END %] code blocks
   --load_perl              Load regular Perl modules via USE directive
   --absolute               Allow ABSOLUTE directories (enabled by default)
   --relative               Allow RELATIVE directories (enabled by default)
   --include_path=DIR       Add directory to INCLUDE_PATH 
   --pre_process=TEMPLATE   Process TEMPLATE before each main template
   --post_process=TEMPLATE  Process TEMPLATE after each main template
   --process=TEMPLATE       Process TEMPLATE instead of main template
   --wrapper=TEMPLATE       Process TEMPLATE wrapper around main template
   --default=TEMPLATE       Use TEMPLATE as default
   --error=TEMPLATE         Use TEMPLATE to handle errors
   --debug=STRING           Set TT DEBUG option to STRING
   --start_tag=STRING       STRING defines start of directive tag
   --end_tag=STRING         STRING defined end of directive tag
   --tag_style=STYLE        Use pre-defined tag STYLE    
   --plugin_base=PACKAGE    Base PACKAGE for plugins            
   --compile_ext=STRING     File extension for compiled template files
   --compile_dir=DIR        Directory for compiled template files
   --perl5lib=DIR           Specify additional Perl library directories
   --template_module=MODULE Specify alternate Template module
   --while_max=INTEGER      Change '\$Template::Directive::WHILE_MAX' default
   --envvars                Set the 'env' variable to the environment (%ENV)

See 'perldoc tpage' for further information.  

END_OF_HELP

    exit(0);
}

__END__


#------------------------------------------------------------------------
# IMPORTANT NOTE
#   This documentation is generated automatically from source
#   templates.  Any changes you make here may be lost.
# 
#   The 'docsrc' documentation source bundle is available for download
#   from http://www.template-toolkit.org/docs.html and contains all
#   the source templates, XML files, scripts, etc., from which the
#   documentation for the Template Toolkit is built.
#------------------------------------------------------------------------

=head1 NAME

Template::Tools::tpage - Process templates from command line

=head1 USAGE

    tpage [ --define var=value ] file(s)

=head1 DESCRIPTION

The B<tpage> script is a simple wrapper around the Template Toolkit processor.
Files specified by name on the command line are processed in turn by the 
template processor and the resulting output is sent to STDOUT and can be 
redirected accordingly.  e.g.

    tpage myfile > myfile.out
    tpage header myfile footer > myfile.html

If no file names are specified on the command line then B<tpage> will read
STDIN for input.

The C<--define> option can be used to set the values of template variables.
e.g.

    tpage --define author="Andy Wardley" skeleton.pm > MyModule.pm

=head2 The F<.tpagerc> Configuration File

You can use a F<.tpagerc> file in your home directory.

The purpose of this file is to set any I<global> configuration options
that you want applied I<every> time F<tpage> is run. For example, you
can use the C<include_path> to use template files from a generic template
directory.

Run C<tpage -h> for a summary of the options available.

See L<Template> for general information about the Perl Template 
Toolkit and the template language and features.

=head1 AUTHOR

Andy Wardley E<lt>abw@wardley.orgE<gt>

L<http://wardley.org/|http://wardley.org/>




=head1 VERSION

2.68, distributed as part of the
Template Toolkit version 2.19, released on 27 April 2007.

=head1 COPYRIGHT

  Copyright (C) 1996-2007 Andy Wardley.  All Rights Reserved.


This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.

=head1 SEE ALSO

L<ttree|Template::Tools::ttree>

=cut

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