#! @PERL@

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

# Copyright (C) 1997 Friedrich Leisch
# Copyright (C) 2000-4 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., 51 Franklin Street,
## Fifth Floor, Boston, MA 02110-1301  USA.

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

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

my $revision = ' $Rev$ ';
my $version;
my $name;

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

## <NOTE>
## Used in Rdconv.pm and Rdlists.pm via $main::OSdir, and hence must not
## be lexical.  Argh.
$OSdir = $R::Vars::OSTYPE;
## </NOTE>

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

my $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 "-";
my $enc = "unknown";
$enc = $opt_encoding if $opt_encoding;

my %types_and_exts = ("txt", "",
		      "html", ".html",
		      "latex", ".tex",		      
		      "Sd", ".d",
		      "Ssgm", ".sgml",
		      "example", ".R");

my $opt_type_ok = 0;

foreach my $type (keys(%types_and_exts)) {
    if($opt_type =~ /$type/i) {
	if(defined $opt_o && length($opt_o) == 0) {
	    $out .= $types_and_exts{$type};
	}
	Rdconv($ARGV[0], $opt_type, $opt_debug, $out, "unknown", "", $enc);
	$opt_type_ok = 1;
	last;
    }
}

if(!$opt_type_ok) {
    print STDERR "Unknown type: options are " .
	join(", ", sort(keys(%types_and_exts))) . ".\n";
}

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 Rdconv version info and exit
  -d, --debug		turn on debugging (increase verbosity)
  -t, --type=TYPE	convert to format TYPE
  --encoding=enc        use 'enc' as the default encoding
  -o, --output=OUT	use 'OUT' as the output file
      --os=NAME		use OS subdir 'NAME' (unix or windows)
      --OS=NAME		the same as '--os'

Possible format specifications are 'txt' (plain text), 'html', 'latex',
'Sd' (old S documentation format), 'Ssgm' (new 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;
}

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