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#-*- perl -*-
# Copyright (C) 2000-3  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: 1.33 $ ';
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", 
            "auto-zip", "build", "fake");
            
##      topLevelFiles will be files that sit in the top level of a
##      zip/tarball along with any included directories.
##  This needs to be fixed: this file shouldn't do binary builds,
##  that's what build.in is for - DJM

my $topLevelFiles = "DESCRIPTION";          
            
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";;
    my $canonpkg = cwd();
    chdir("..");
    my $pkgdir = cwd();
    chdir($startdir);

    die "no valid package name found\n" unless length($pkgname) > 0;
    my $pkgoutdir = "$library/$pkgname";
    die "  *** can't install into source directory ***\n" 
    if $canonpkg eq $pkgoutdir;
    rmtree($pkgoutdir) if (-d $pkgoutdir);

    my $makecmd = "pkg";
    $makecmd = "pkgfake" if $opt_fake;
    if(-r "$pkg/DESCRIPTION"){
    $description = new R::Dcf("$pkg/DESCRIPTION");
    }
    
    my $zippkgs = $pkgname;
    if($description->{"Contains"}) {
    print "\nLooks like \`${pkg}' is a package bundle\n";
    $makecmd = "bundle";
    $is_bundle = 1;
    @bundlepkgs = split(/\s+/, $description->{"Contains"});
    $zippkgs = join(" ", @bundlepkgs);
    }
    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;
    my $opt = "";
    if(!$is_bundle) {
        if($opt_auto_zip || $opt_build) {
        my $dir = $pkgdir. "/" . $pkgname . "/data";
        if(-d $dir && 
           $pkgname ne "RadioSonde" && $pkgname ne "dichromat"
           && $pkgname ne "pls.pcr") {
        my $Rout = "datacnt";
        system("ls -s1 $dir > $Rout");
        my $out, $nodups=1, $prev="";
        open ROUT, "< $Rout";
        while(<ROUT>) {
            if(/^total/) {
            s/^total //;
            $out = $_;
            } else {
            chomp;
            s/\s*[0-9]+\ //;
            s/\.[a-zA-Z]+$//;
            $nodups = 0 if $_ eq $prev;
            $prev = $_;
            }
        }
        close ROUT;
        unlink $Rout;
        $opt = "$pkgname-ZIPDATA=zip" if $out > 100 && $nodups;
        }
        $dir = $pkgdir. "/" . $pkgname . "/man";
        if(-d $dir) {
        opendir(DIR, $dir) or die "cannot opendir $dir: $!";
        @files = grep{ /\.Rd$/ } readdir(DIR);
        closedir(DIR);
        $opt = $opt . " $pkgname-HELP=ziponly" if @files > 20;
        }
        print "Using auto-selected zip options '$opt'\n";
        } else {
            $opt = "$pkgname-ZIPDATA=zip" 
        if ($opt_use_zip || $opt_use_zip_data);
            $opt = $opt . " $pkgname-HELP=ziponly"
        if ($opt_use_zip || $opt_use_zip_help);
        }
    } else {
        ## note: --auto-zip is not supported for bundles
        foreach $ppkg (@bundlepkgs) {
        $opt = $opt . " $ppkg-ZIPDATA=zip" if ($opt_use_zip || $opt_use_zip_data);
        $opt = $opt . " $ppkg-HELP=ziponly" if ($opt_use_zip || $opt_use_zip_help);
    }
    }
    my $res = system("make --no-print-directory -C $R_HOME/src/gnuwin32 PKGDIR=$pkgdir RLIB=$library SAVE=$save $opt $helpflags $makecmd-$pkgname");
    if($res) {
    printf "*** Installation of $pkgname failed ***\n";
    } else {
        if($opt_build) {
        my $filename = "${pkgname}_" . $description->{"Version"};
        chdir($library);
        system("rm -f  $startdir/$filename.zip");
        system("zip -r9Xq $startdir/$filename.zip $zippkgs");
        if ($is_bundle) {
        ## Need to get the toplevel files in there
        $currentDir = cwd();
        chdir($canonpkg);
        system("zip $startdir/$filename.zip $topLevelFiles");
        chdir($currentDir);
        }
    }
    }

    system("make --no-print-directory -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 --no-print-directory -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.
Then optionally pack the installed package into a zip file.

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\'
      --auto-zip    select whether to zip automatically
      --build       zip-up the installation. Implies --auto-zip
      --fake        do minimal install for testing purposes

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;
}