#! /usr/local/bin/perl
#-*- perl -*- (for Rdconv.in ..)

## Convert R documentation into HTML, LaTeX and text format

# Copyright (C) 1997 Friedrich Leisch
# Copyright (C) 2000 The R Core Development Team
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the GNU
# General Public License for more details.
#
# A copy of the GNU General Public License is available via WWW at
# http://www.gnu.org/copyleft/gpl.html.	 You can also obtain it by
# writing to the Free Software Foundation, Inc., 59 Temple Place,
# Suite 330, Boston, MA  02111-1307  USA.

# Send any bug reports to r-bugs@r-project.org.

use Getopt::Long;
use R::Rdconv;
use R::Utils;

my $revision = ' $Revision: 1.21 $ ';
my $version;
my $name;

$revision =~ / ([\d\.]*) /;
$version = $1;
($name = $0) =~ s|.*/||;

sub usage {
  print STDERR <<END;
Usage: R CMD Rdconv [options] FILE

Convert R documentation in FILE to other formats such as plain text,
HTML or LaTeX.

Options:
  -h, --help		print short help message and exit
  -v, --version		print version info and exit
  -d, --debug		turn on debugging (increase verbosity)
  -t, --type=TYPE	convert to format TYPE
  -o, --output=OUT	use \`OUT\' as the output file
      --os=NAME		use OS subdir \`NAME\' (unix, mac or windows)
      --OS=NAME		the same as \`--os\'.

Possible format specifications are \`txt\' (plain text), \`html\',
\`latex\', \`Sd\' (S documentation format), and \`example\' (extract R
code in the examples).

The default is to send output to stdout, which is also given by \`-o -\'.
Using \`-o \"\"\' will choose an output filename by removing a \`.Rd\'
extension from FILE and adding a suitable extension.
  
Email bug reports to <r-bugs\@r-project.org>.
END
  exit 0;
}

## <FIXME>
## Currently, R_OSTYPE is always set on Unix/Windows.
my $OSdir = R_getenv("R_OSTYPE", "mac");
## </FIXME>

@knownoptions = ("debug|d", "type|t:s", "h|help", "v|version", 
		 "o|output:s", "os|OS:s");
GetOptions (@knownoptions) || &usage();
&R_version($name, $version) if $opt_v;
&usage() if $opt_h;

$OSdir = $opt_os if $opt_os;
$out = 0;
if(defined $opt_o) {
    if(length($opt_o)) { $out = $opt_o; }
    else { $out = $ARGV[0]; $out =~ s/.Rd$//i; }
}
$out = 0 if $out eq "-";

usage() if $opt_help;

if($opt_type =~ /html/i){
    if(defined $opt_o && length($opt_o) == 0) { $out = $out . ".html"; }
    Rdconv($ARGV[0],$opt_type,$opt_debug, $out);
}
elsif($opt_type =~ /txt/i){
    Rdconv($ARGV[0],$opt_type,$opt_debug, $out);
}
elsif($opt_type =~ /Sd/i){
    if(defined $opt_o && length($opt_o) == 0) { $out = $out . ".d"; }
    Rdconv($ARGV[0],$opt_type,$opt_debug, $out);
}
elsif($opt_type =~ /latex/i){
    if(defined $opt_o && length($opt_o) == 0) { $out = $out . ".tex"; }
    Rdconv($ARGV[0],$opt_type,$opt_debug, $out);
}
elsif($opt_type =~ /example/i){
    if(defined $opt_o && length($opt_o) == 0) { $out = $out . ".R"; }
    Rdconv($ARGV[0],$opt_type,$opt_debug, $out);
} else {
    print STDERR "Unknown type: options are txt, html, latex, Sd, example\n";
}
