#!./perl

$mainperldir = "/usr/bin";

while (@ARGV) {
    $nonono = 1 if $ARGV[0] eq '-n';
    $versiononly = 1 if $ARGV[0] eq '-v';
    shift;
}

umask 022;

@scripts = ('cppstdin', 'h2ph', 'c2ph', 'pstruct', 'x2p/s2p', 'x2p/find2perl');
@manpages = ('perl.man', 'h2ph.man', 'x2p/a2p.man', 'x2p/s2p.man');

# Read in the config file.

open(CONFIG, "config.sh") || die "You haven't run Configure yet!\n";
while (<CONFIG>) {
    if (s/^(\w+=)/\$$1/) {
	$accum =~ s/'undef'/undef/g;
	eval $accum;
	$accum = '';
    }
    $accum .= $_;
}
close CONFIG;

open(PERL_C, "perl.c");
while (<PERL_C>) {
    last if /Revision:/;
}
close PERL_C;
s/.*Revision: //;
$major = $_ + 0;

$ver = sprintf("%5.3f", $major + $PATCHLEVEL / 1000);
$release = substr($ver,0,3);
$patchlevel = substr($ver,3,2);

# Do some quick sanity checks.

if ($d_dosuid && $>) { die "You must run as root to install suidperl\n"; }

   $installbin		|| die "No installbin directory in config.sh\n";
-d $installbin		|| die "$installbin is not a directory\n";
-w $installbin		|| die "$installbin is not writable by you\n"
	unless $installbin =~ m#^/afs/#;

-x 'perl'		|| die "perl isn't executable!\n";
-x 'taintperl'		|| die "taintperl isn't executable!\n";
-x 'suidperl'		|| die "suidperl isn't executable!\n" if $d_dosuid;

-x 't/TEST'		|| warn "WARNING: You've never run 'make test'!!!",
	"  (Installing anyway.)\n";

# First we install the version-numbered executables.

&unlink("$installbin/perl$ver");
&cmd("cp perl $installbin/perl$ver");

&unlink("$installbin/tperl$ver");
&cmd("cp taintperl $installbin/tperl$ver");
&chmod(0755, "$installbin/tperl$ver");		# force non-suid for security

&unlink("$installbin/sperl$ver");
if ($d_dosuid) {
    &cmd("cp suidperl $installbin/sperl$ver");
    &chmod(04711, "$installbin/sperl$ver");
}

exit 0 if $versiononly;

# Make links to ordinary names if installbin directory isn't current directory.

($bdev,$bino) = stat($installbin);
($ddev,$dino) = stat('.');

if ($bdev != $ddev || $bino != $dino) {
    &unlink("$installbin/perl", "$installbin/taintperl", "$installbin/suidperl");
    &link("$installbin/perl$ver", "$installbin/perl");
    &link("$installbin/tperl$ver", "$installbin/taintperl");
    &link("$installbin/sperl$ver", "$installbin/suidperl") if $d_dosuid;
}

($bdev,$bino) = stat($installbin);
($ddev,$dino) = stat('x2p');

if ($bdev != $ddev || $bino != $dino) {
    &unlink("$installbin/a2p");
    &cmd("cp x2p/a2p $installbin/a2p");
    &chmod(0755, "$installbin/a2p");
}

# Make some enemies in the name of standardization.   :-)

($udev,$uino) = stat($mainperldir);

if (-w _ && ($udev != $bdev || $uino != $bino) && !$nonono) {
    &unlink("$mainperldir/perl");
    eval 'link("$installbin/perl", "$mainperldir/perl")' ||
    eval 'symlink("$installbin/perl", "$mainperldir/perl")' ||
    &cmd("cp $installbin/perl $mainperldir");
}

# Install scripts.

&makedir($installscr);

for (@scripts) {
    &cmd("cp $_ $installscr");
    s#.*/##; &chmod(0755, "$installscr/$_");
}

# Install man pages.

if ($mansrc ne '') {
    &makedir($mansrc);

    ($mdev,$mino) = stat($mansrc);
    if ($mdev != $ddev || $mino != $dino) {
	for (@manpages) {
	    ($new = $_) =~ s/man$/$manext/;
	    $new =~ s#.*/##;
	    print STDERR "  Installing $mansrc/$new\n";
	    next if $nonono;
	    open(MI,$_) || warn "Can't open $_: $!\n";
	    open(MO,">$mansrc/$new") || warn "Can't install $mansrc/$new: $!\n";
	    print MO ".ds RP Release $release Patchlevel $patchlevel\n";
	    while (<MI>) {
		print MO;
	    }
	    close MI;
	    close MO;
	}
    }
}

# Install library files.

&makedir($installprivlib);
if (chdir "lib") {

    ($pdev,$pino) = stat($installprivlib);
    ($ldev,$lino) = stat('.');

    if ($pdev != $ldev || $pino != $lino) {
	foreach $file (<*.pl>) {
	    system "cmp", "-s", $file, "$privlib/$file";
	    if ($?) {
		&unlink("$installprivlib/$file");
		&cmd("cp $file $installprivlib");
		&chmod(0644, "$installprivlib/$file");
	    }
	}
    }
    chdir ".." || die "Can't cd back to source directory: $!\n";
}
else {
    warn "Can't cd to lib to install lib files: $!\n";
}

&chmod(0755, "usub/mus");

print STDERR "  Installation complete\n";

exit 0;

###############################################################################

sub unlink {
    local(@names) = @_;

    foreach $name (@names) {
	next unless -e $name;
	print STDERR "  unlink $name\n";
	unlink($name) || warn "Couldn't unlink $name: $!\n" unless $nonono;
    }
}

sub cmd {
    local($cmd) = @_;
    print STDERR "  $cmd\n";
    unless ($nonono) {
	system $cmd;
	warn "Command failed!!!\n" if $?;
    }
}

sub link {
    local($from,$to) = @_;

    print STDERR "  ln $from $to\n";
    link($from,$to) || warn "Couldn't link $from to $to: $!\n" unless $nonono;
}

sub chmod {
    local($mode,$name) = @_;

    printf STDERR "  chmod %o %s\n", $mode, $name;
    chmod($mode,$name) || warn "Couldn't chmod $mode $name: $!\n"
	unless $nonono;
}

sub makedir {
    local($dir) = @_;
    unless (-d $dir) {
	local($shortdir) = $dir;

	$shortdir =~ s#(.*)/.*#$1#;
	&makedir($shortdir);

	print STDERR "  mkdir $dir\n";
	mkdir($dir, 0777) || warn "Couldn't create $dir: $!\n" unless $nonono;
    }
}