#-*- perl -*-
# Copyright (C) 2000, 2001  R Development Core 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 Cwd;
use File::Basename;
use File::Path;
use Getopt::Long;
use R::Dcf;
use R::Utils;


my $revision = ' $Revision: 1.18 $ ';
my $version;
my $name;
$revision =~ / ([\d\.]*) /;
$version = $1;
($name = $0) =~ s|.*/||;


my @knownoptions = ("help|h", "version|v", "debug|d", "library|l:s",
		    "clean|c", "docs:s", "save|s", "no-save",
		    "use-zip", "use-zip-data", "use-zip-help");
			
GetOptions (@knownoptions) || usage();
R_version($name, $version) if $opt_version;

my $R_HOME = $ENV{'R_HOME'} ||
    die "Error: Environment variable R_HOME not found\n";
usage() if $opt_help;

my $startdir = cwd();
if($opt_library){
    chdir($opt_library) ||
	die "Error: cannot change to directory \`$opt_library'\n";
    $library = cwd();
    chdir($startdir);
} else {
    $library = $R_HOME . "/library";
}

my $helpflags = "HELP=YES WINHELP=CHM";
if($opt_docs) {
    if ($opt_docs eq "none") {
	$helpflags = "HELP=NO";
    } elsif ($opt_docs eq "normal") {
	$helpflags = "HELP=YES WINHELP=NO";
    } elsif ($opt_docs eq "chm") {
	$helpflags = "HELP=YES WINHELP=CHM";
    } elsif (($opt_docs eq "winhlp") || ($opt_docs eq "all")) {
	$helpflags = "HELP=YES WINHELP=BOTH";
    } else {
	die "ERROR: invalid --docs value `$opt_docs'\n";
    }
}

## this is the main loop over all packages to be installed
my $pkg;
foreach $pkg (@ARGV){
    # remove misguided trailing separator (/ or \)
    $pkg =~ s/\/$//; $pkg =~ s/\\$//;
    my $pkgname = basename($pkg);
    my $is_bundle = 0;
    my $istar = 0;

    if (!(-e $pkg)) {
	warn "`$pkg' does not exist: skipping\n";
	next;
    }

## is this a tar archive?
    if($pkgname =~ /\.tar\.gz$/) {
	$pkgname =~ s/\.tar\.gz$//;
	$pkgname =~ s/_[0-9\.-]*$//;
	my $dir = "R.INSTALL";
	mkdir($dir, 755);
	    ## workaround for paths in Cygwin tar
	    $pkg =~ s+^([A-Za-x]):+/cygdrive/\1+;
	if(system("tar -zxf $pkg -C $dir")) {
	    die "Error: cannot untar the package\n";}
	$pkg = $dir."/".$pkgname;
	$istar = 1;
    }

    chdir($pkg)||
	die "Error: cannot change to directory \`$pkg'\n";;
    chdir("..");
    my $pkgdir = cwd();
    chdir($startdir);

    die "no valid package name found\n" unless length($pkgname) > 0;
    my $pkgoutdir = "$library/$pkgname";
    rmtree($pkgoutdir) if (-d $pkgoutdir);

    my $makecmd = "pkg";
    if(-r "$pkg/DESCRIPTION"){
	$description = new R::Dcf("$pkg/DESCRIPTION");
    }
    
    if($description->{"Contains"}) {
	print "\nLooks like \`${pkg}' is a package bundle\n";
	$makecmd = "bundle";
	$is_bundle = 1;
	@bundlepkgs = split(/\s+/, $description->{"Contains"});
    }
    print "\n";

    if($description->{"Depends"}) {
	my $depends = $description->{"Depends"};
	if($depends =~ /\bR *\(([^) ]+) *([^) ]+)\)/) { # regexp from check
            my $op = $1;
            my $ver = $2; 
	    my $Rversion = $ENV{'R_VERSION'};
	    if ($op eq ">=" && $ver) {
		die "This R is version $Rversion\n".
		    "    package \`$pkgname' requires R $ver or later\n"
			unless $Rversion ge $ver;
	    } elsif ($op eq "<=" && $ver) {
		die "This R is version $Rversion\n".
		    "     package \`$pkgname' requires R $ver or earlier\n"
			unless $Rversion le $ver;
	    } else {
		printf "unsupported operator in dependence \"$depends\"\n";
	    }
        }
    }

    my $save = "CHECK";
    $save = "false" if $opt_no_save;
    $save = "true" if $opt_save;
    if(system("make -C $R_HOME/src/gnuwin32 PKGDIR=$pkgdir RLIB=$library SAVE=$save $helpflags $makecmd-$pkgname")){
	printf "*** Installation of $pkgname failed ***\n";
    } else {
	if($opt_use_zip || $opt_use_zip_data) {
	    if($is_bundle) {
		foreach $ppkg (@bundlepkgs) {
		    system("make -C $R_HOME/src/gnuwin32 RLIB=$library zipdata-$ppkg") if -d "$library/$ppkg/data" && $ppkg ne "spatial";
		}
	    } else {
		system("make -C $R_HOME/src/gnuwin32 RLIB=$library zipdata-$pkgname") if -d "$library/$pkgname/data";
	    }
	}
	if($opt_use_zip || $opt_use_zip_help) {
	    if($is_bundle) {
		foreach $ppkg (@bundlepkgs) {
		    system("make -C $R_HOME/src/gnuwin32 PKGD=$pkgdir/$pkgname RLIB=$library ziponly-$ppkg");
		}
	    } else {
		system("make -C $R_HOME/src/gnuwin32 PKGDIR=$pkgdir RLIB=$library ziponly-$pkgname");
	    }
	}
    }

    system("make -C $R_HOME/src/gnuwin32 PKGDIR=$pkgdir RLIB=$library pkgclean-$pkgname") if ($opt_clean && $is_bundle == 0);

    if($opt_clean && $is_bundle) {
	foreach $ppkg (@bundlepkgs) {
	    system("make -C $R_HOME/src/gnuwin32 PKGDIR=$pkgdir/$pkgname RLIB=$library pkgclean-$ppkg") 
	}

    }
    if ($istar > 0) {
	chdir($startdir);
	rmtree("R.INSTALL");
    }
    print("\n");
}

if((-e "$R_HOME/doc/html/R.css") && !(-e "$library/R.css")) {
    printf "installing R.css in $library\n";
    system("cp $R_HOME/doc/html/R.css $library/R.css");
}

sub usage {
    print STDERR <<END;
Usage: Rcmd $name [options] pkgs

Install the add-on packages specified by pkgs into the default R library
tree ($R_HOME/library) or the tree specified via \`--library'.  The
elements of pkgs can be relative or absolute paths to directories with
the package (bundle) sources, or to gzipped package \`tar' archives.

Options:
  -h, --help		print short help message and exit
  -v, --version		print version info and exit
  -c, --clean		remove all files created during installation
  -s, --save            Save the package source as an image file, and arrange for
                        this file to be loaded when the library is attached.
  --no-save             Do not save the package source as an image file.
  -d, --debug		[x] turn on shell and build-help debugging
  -l, --library=LIB	install packages to library tree LIB
      --docs=TYPE	type(s) of documentation to build and install
      --use-zip-data	collect data files in zip archive
      --use-zip-help	collect help and examples into zip archives
      --use-zip		combine \`--use-zip-data\' and \`--use-zip-help\'

TYPE can be "none" or "normal" or "chm" (the default) or "winhlp" or "all"

Report bugs to <r-bugs\@r-project.org>.
END
    exit 0;
}