#!/usr/bin/perl -w

###############################################################################
###############################################################################
##
##  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
##  Copyright (C) 2004 Red Hat, Inc.  All rights reserved.
##  
##  This copyrighted material is made available to anyone wishing to use,
##  modify, copy, or redistribute it subject to the terms and conditions
##  of the GNU General Public License v.2.
##
###############################################################################
###############################################################################

use Getopt::Long;
use POSIX qw(uname);

print "\nConfiguring Makefiles for your system...\n";

# Set a bunch of variables

$ret = 0;

%options = (
	help => \$help,
	cc => \$cc,
	debug => \$debug,
	cflags => \$cflags,
	extracflags => \$extracflags,
	ldflags => \$ldflags,
	extraldflags => \$extraldflags,
	kernel_build => \$kernel_build,
	kernel_src => \$kernel_src,
	module_dir => \$module_dir,
	gfskincdir => \$gfskincdir,
	gnbdkincdir => \$gnbdkincdir,
        incdir => \$incdir,
	libdir => \$libdir,
        ccsincdir => \$ccsincdir,
	ccslibdir => \$ccslibdir,
	cmanincdir => \$cmanincdir,
	cmanlibdir => \$cmanlibdir,
	dlmincdir => \$dlmincdir,
	dlmlibdir => \$dlmlibdir,
	volidincdir => \$volidincdir,
	volidlibdir => \$volidlibdir,
	ncursesincdir => \$ncursesincdir,
	ncurseslibdir => \$ncurseslibdir,
	readlineincdir => \$readlineincdir,
	readlinelibdir => \$readlinelibdir,
	openaisincdir => \$openaisincdir,
	openaislibdir => \$openaislibdir,
	aisexecbin => \$aisexecbin,
	virtincdir => \$virtincdir,
	virtlibdir => \$virtlibdir,
	nssincdir => \$nssincdir,
	nsslibdir => \$nsslibdir,
	nsprincdir => \$nsprincdir,
	nsprlibdir => \$nsprlibdir,
	xenincdir => \$xenincdir,
	xenlibdir => \$xenlibdir,
	libexecdir => \$libexecdir,
	mandir  => \$mandir,
	prefix => \$prefix,
	sbindir => \$sbindir,
	sharedir => \$sharedir,
	fence_agents => \$fence_agents,
	enable_xen => \$enable_xen,
	release_major => \$release_major,
	release_minor => \$release_minor,
	without_ccs => \$without_ccs,
	without_cman => \$without_cman,
	without_dlm => \$without_dlm,
	without_group => \$without_group,
	without_fence => \$without_fence,
	without_gfs => \$without_gfs,
	without_gfs2 => \$without_gfs2,
	without_gnbd => \$without_gnbd,
	without_rgmanager => \$without_rgmanager,
);

$err = &GetOptions (\%options,
		    'help',
		    'cc=s',
		    'debug',
		    'cflags=s',
		    'ldflags=s',
		    'kernel_build=s',
		    'kernel_src=s',
		    'module_dir=s',
		    'gfskincdir=s',
		    'gnbdkincdir=s',
		    'incdir=s',
		    'libdir=s',
		    'ccsincdir=s',
		    'ccslibdir=s',
		    'cmanincdir=s',
		    'cmanlibdir=s',
		    'dlmincdir=s',
		    'dlmlibdir=s',
		    'volidincdir=s',
		    'volidlibdir=s',
		    'ncursesincdir=s',
		    'ncurseslibdir=s',
		    'readlineincdir=s',
		    'readlinelibdir=s',
		    'openaisincdir=s',
		    'openaislibdir=s',
		    'aisexecbin=s',
		    'virtincdir=s',
		    'virtlibdir=s',
		    'nssincdir=s',
		    'nsslibdir=s',
		    'nsprincdir=s',
		    'nsprlibdir=s',
		    'xenincdir=s',
		    'xenlibdir=s',
		    'libexecdir=s',
		    'mandir=s',
		    'prefix=s',
		    'sbindir=s',
		    'sharedir=s',
		    'release_major=s',
		    'release_minor=s',
		    'fence_agents=s',
		    'enable_xen',
		    'without_ccs',
		    'without_cman',
		    'without_dlm',
		    'without_group',
		    'without_fence',
		    'without_gfs',
		    'without_gfs2',
		    'without_gnbd',
		    'without_rgmanager');

if(!$err) {
  $ret = 1;
  print "*** ERROR: Invalid option detected ***\n";
}

# Check for the --help flag
if ($help || !$err) {
  $_ = $0;
  s/.*\.\/(.*)/$1/;
  print "Usage: $_ [flags]\n";
  print "--help\t\tPrints this usage information\n\n";
  print "install flags:\n";
  print "--prefix=\tthe base directory to install into.  (Default: /usr)\n";
  print "--sbindir=\tthe base directory for system binaries.  (Default: {prefix}/sbin)\n";
  print "--libdir=\tthe base directory for libraries.  (Default: {prefix}/lib)\n";
  print "--libexecdir=\tthe base directory for executable components.  (Default: {prefix}/libexec)\n";
  print "--sharedir=\tthe base directory for misc cluster files.  (Default: {prefix}/share/cluster)\n";
  print "--mandir=\tthe base directory for man pages.  (Default: {prefix}/share/man)\n";
  print "--module_dir=\tthe base directory for kernel modules.  (Default:  /lib/modules/`uname -r`/kernel\n";
  print "\nbuild flags:\n";
  print "--cc=\t\tcompiler to use.  (Default: gcc)\n";
  print "--debug\t\tEnable debugging build. Changes default CFLAGS to -Wall -O0 -DDEBUG -g.\n";
  print "--cflags=\toverride default CFLAGS settings.  (Default: -Wall -O2 -g)\n";
  print "--extracflags=\tadd extra compiler options to default CFLAGS setting.  (Default: none)\n";
  print "--ldflags=\toverride default LDFLAGS settings.  (Default: none)\n";
  print "--extraldflags=\tadd extra linking options to default LDFLAGS settings.  (Default: none)\n";
  print "--kernel_build=\tthe directory containing the kernel object tree you wish to\n\t\tcompile against. (Default: /lib/modules/`uname -r`/build\n\t\tif available or /usr/src/linux as fallback)\n";
  print "--kernel_src=\tthe directory containing the kernel source you wish to\n\t\tcompile against.  (Default: /lib/modules/`uname -r`/source\n\t\tif available or \$kernel_build as fallback)\n";
  print "--incdir=\tthe base directory for include files.  (Default: {prefix}/include)\n";
  print "--ccsincdir=\tthe base directory for ccs include files.  (Default: ./ccs/lib)\n";
  print "--ccslibdir=\tthe base directory for ccs libraries.  (Default: ./ccs/lib)\n";
  print "--cmanincdir=\tthe base directory for cman include files.  (Default: ./cman/lib)\n";
  print "--cmanlibdir=\tthe base directory for cman libraries.  (Default: ./cman/lib)\n";
  print "--dlmincdir=\tthe base directory for dlm include files.  (Default: ./dlm/lib)\n";
  print "--dlmlibdir=\tthe base directory for dlm libraries.  (Default: ./dlm/lib)\n";
  print "--volidincdir=\tthe base directory for volume_id include files.  (Default: {incdir})\n";
  print "--volidlibdir=\tthe base directory for volume_id libraries.  (Default: {libdir})\n";
  print "--ncursesincdir=\tthe base directory for ncurses include files.  (Default: {incdir})\n";
  print "--ncurseslibdir=\tthe base directory for ncurses libraries.  (Default: {libdir})\n";
  print "--readlineincdir=\tthe base directory for readline include files.  (Default: {incdir})\n";
  print "--readlinelibdir=\tthe base directory for readline libraries.  (Default: {libdir})\n";
  print "--openaisincdir=\tthe base directory for openais include files.  (Default: {incdir})\n";
  print "--openaislibdir=\tthe base directory for openais libraries.  (Default: {libdir}/openais)\n";
  print "--aisexecbin=\tlocation of aisexec executable file.  (Default: /usr/sbin/aisexec)\n";
  print "--nssincdir=\tthe base directory for libnss include files.  (Default: {incdir}/nss3)\n";
  print "--nsslibdir=\tthe base directory for libnss libraries.  (Default: {libdir})\n";
  print "--nsprincdir=\tthe base directory for libnspr include files.  (Default: {incdir}/nspr4)\n";
  print "--nsprlibdir=\tthe base directory for libnspr libraries.  (Default: {libdir})\n";
  print "--virtincdir=\tthe base directory for libvirt include files.  (Default: {incdir}/libvirt)\n";
  print "--virtlibdir=\tthe base directory for libvirt libraries.  (Default: {libdir})\n";
  print "--xenincdir=\tthe base directory for xen include files.  (Default: {incdir}/xen)\n";
  print "--xenlibdir=\tthe base directory for xen libraries.  (Default: {libdir})\n";
  print "--fence_agents=\tlist of fence agents to configure.  (Default: all)\n";
  print "\t\tUse --fence_agents=help for a list\n";
  print "--enable_xen\tEnable building of Xen-specific pieces\n";
  print "--without_ccs\tDisable ccs building  (Default: enabled)\n";
  print "--without_cman\tDisable cman building  (Default: enabled)\n";
  print "--without_dlm\tDisable dlm building  (Default: enabled)\n";
  print "--without_group\tDisable group building  (Default: enabled)\n";
  print "--without_fence\tDisable fence building  (Default: enabled)\n";
  print "--without_gfs\tDisable gfs building  (Default: enabled)\n";
  print "--without_gfs2\tDisable gfs2 building  (Default: enabled)\n";
  print "--without_gnbd\tDisable gnbd building  (Default: enabled)\n";
  print "--without_rgmanager\tDisable rgmanager building  (Default: enabled)\n";
  exit $ret;
}

$pwd = `pwd`;
chomp($pwd);

if (!$cc) {
  $cc="gcc";
}
if (!$cflags) {
  $cflags="-Wall";
  if (!$debug) {
    $cflags="${cflags} -O2";
  } else {
    $cflags="${cflags} -O0 -DDEBUG";
  }
  $cflags="${cflags} -g";
}
if ($extracflags) {
  $cflags="${cflags} ${extracflags}";
}
if (!$ldflags) {
  $ldflags="";
}
if ($extraldflags) {
  $ldflags="${ldflags} ${extraldflags}";
}
if (!$prefix) {
  $prefix="/usr";
}

my @un = POSIX::uname();
if (!$kernel_build) {
  if (-d "/lib/modules/$un[2]/build") {
    $kernel_build="/lib/modules/$un[2]/build";
  } else {
    $kernel_build="/usr/src/linux";
  }
}
if (!$kernel_src) {
  if (-d "/lib/modules/$un[2]/source") {
    $kernel_src="/lib/modules/$un[2]/source";
  } else {
    $kernel_src=$kernel_build;
  }
}
if (!$module_dir) {
  $module_dir="/lib/modules/$un[2]/kernel";
}
if (!$gfskincdir) {
  $gfskincdir="${pwd}/gfs-kernel/src/gfs";
}
if (!$gnbdkincdir) {
  $gnbdkincdir="${pwd}/gnbd-kernel/src";
}
if (!$incdir) {
  $incdir="${prefix}/include";
}
if (!$libdir) {
  $libdir="${prefix}/lib";
}
if (!$ccsincdir) {
  $ccsincdir="${pwd}/ccs/lib";
}
if (!$ccslibdir) {
  $ccslibdir="${pwd}/ccs/lib";
}
if (!$cmanincdir) {
  $cmanincdir="${pwd}/cman/lib";
}
if (!$cmanlibdir) {
  $cmanlibdir="${pwd}/cman/lib";
}
if (!$dlmincdir) {
  $dlmincdir="${pwd}/dlm/lib";
}
if (!$dlmlibdir) {
  $dlmlibdir="${pwd}/dlm/lib";
}
if (!$volidincdir) {
  $volidincdir="${incdir}";
}
if (!$volidlibdir) {
  $volidlibdir="${libdir}";
}
if (!$readlineincdir) {
  $readlineincdir="${incdir}";
}
if (!$readlinelibdir) {
  $readlinelibdir="${libdir}";
}
if (!$ncursesincdir) {
  $ncursesincdir="${incdir}";
}
if (!$ncurseslibdir) {
  $ncurseslibdir="${libdir}";
}
if (!$openaisincdir) {
  $openaisincdir="${incdir}";
}
if (!$openaislibdir) {
  $openaislibdir="${libdir}/openais";
}
if (!$aisexecbin) {
  $aisexecbin="/usr/sbin/aisexec";
}
if (!$nssincdir) {
  $nssincdir="${incdir}/nss3";
}
if (!$nsslibdir) {
  $nsslibdir="${libdir}";
}
if (!$nsprincdir) {
  $nsprincdir="${incdir}/nspr4";
}
if (!$nsprlibdir) {
  $nsprlibdir="${libdir}";
}
if (!$virtincdir) {
  $virtincdir="${incdir}/libvirt";
}
if (!$virtlibdir) {
  $virtlibdir="${libdir}";
}
if (!$xenincdir) {
  $xenincdir="${incdir}/xen";
}
if (!$xenlibdir) {
  $xenlibdir="${libdir}";
}
if (!$libexecdir) {
  $libexecdir="${prefix}/libexec";
}
if (!$mandir) {
  $mandir="${prefix}/share/man";
}
if (!$sbindir) {
  $sbindir="${prefix}/sbin";
}
if (!$sharedir) {
  $sharedir="${prefix}/share/cluster";
}
if (!$fence_agents) {
  $fence_agents="all";
}
if (!$enable_xen) {
  $enable_xen="";
}
if (!$without_ccs) {
  $without_ccs="";
}
if (!$without_cman) {
  $without_cman="";
}
if (!$without_dlm) {
  $without_dlm="";
}
if (!$without_group) {
  $without_group="";
}
if (!$without_fence) {
  $without_fence="";
}
if (!$without_gfs) {
  $without_gfs="";
}
if (!$without_gfs2) {
  $without_gfs2="";
}
if (!$without_gnbd) {
  $without_gnbd="";
}       
if (!$without_rgmanager) {
  $without_rgmanager="";
}
if (not length $release_major) {
  $release_major="";
}
if (not length $release_minor) {
  $release_minor="";
}

@args = "find fence/agents -mindepth 2 -maxdepth 2 -name Makefile -printf '%h'";
open (IFILE, "@args |");
while (<IFILE>) {
  chomp;
  s|fence\/agents\/| |g;
  $all_fence = $_;
}
close IFILE;

if ($fence_agents eq "help") {
  print "Available fence agents:\n$all_fence\n";
  exit 0;
}

if ((!$fence_agents) || ($fence_agents eq "all")) {
  print "\nThe following fence agents will be build on this system:\n$all_fence\n";
  print "\nNOTE: xvm will build only if --enable_xen has been specified\n\n";
  $fence_agents = $all_fence
}

open IFILE, "<make/defines.mk.input" or die "Can't redirect stdin";
open OFILE, ">make/defines.mk" or die "Can't redirect stdout";

print OFILE "# This file was generated by configure from defines.mk.input\n";

while (<IFILE>) {
  chomp;
  $_ =~ s/\@BUILDDIR\@/$pwd/;
  $_ =~ s/\@CC\@/$cc/;
  $_ =~ s/\@CFLAGS\@/$cflags/;
  $_ =~ s/\@LDFLAGS\@/$ldflags/;
  $_ =~ s/\@KERNEL_BUILD\@/$kernel_build/;
  $_ =~ s/\@KERNEL_SRC\@/$kernel_src/;
  $_ =~ s/\@MODULE_DIR\@/$module_dir/;
  $_ =~ s/\@GFSKINCDIR\@/$gfskincdir/;
  $_ =~ s/\@GNBDKINCDIR\@/$gnbdkincdir/;
  $_ =~ s/\@INCDIR\@/$incdir/;
  $_ =~ s/\@LIBDIR\@/$libdir/;
  $_ =~ s/\@CCSINCDIR\@/$ccsincdir/;
  $_ =~ s/\@CCSLIBDIR\@/$ccslibdir/;
  $_ =~ s/\@CMANINCDIR\@/$cmanincdir/;
  $_ =~ s/\@CMANLIBDIR\@/$cmanlibdir/;
  $_ =~ s/\@DLMINCDIR\@/$dlmincdir/;
  $_ =~ s/\@DLMLIBDIR\@/$dlmlibdir/;
  $_ =~ s/\@VOLIDINCDIR\@/$volidincdir/;
  $_ =~ s/\@VOLIDLIBDIR\@/$volidlibdir/;
  $_ =~ s/\@READLINEINCDIR\@/$readlineincdir/;
  $_ =~ s/\@READLINELIBDIR\@/$readlinelibdir/;
  $_ =~ s/\@NCURSESINCDIR\@/$ncursesincdir/;
  $_ =~ s/\@NCURSESLIBDIR\@/$ncurseslibdir/;
  $_ =~ s/\@OPENAISINCDIR\@/$openaisincdir/;
  $_ =~ s/\@OPENAISLIBDIR\@/$openaislibdir/;
  $_ =~ s/\@AISEXECBIN\@/$aisexecbin/;
  $_ =~ s/\@XENINCDIR\@/$xenincdir/;
  $_ =~ s/\@XENLIBDIR\@/$xenlibdir/;
  $_ =~ s/\@NSSINCDIR\@/$nssincdir/;
  $_ =~ s/\@NSSLIBDIR\@/$nsslibdir/;
  $_ =~ s/\@NSPRINCDIR\@/$nsprincdir/;
  $_ =~ s/\@NSPRLIBDIR\@/$nsprlibdir/;
  $_ =~ s/\@VIRTINCDIR\@/$virtincdir/;
  $_ =~ s/\@VIRTLIBDIR\@/$virtlibdir/;
  $_ =~ s/\@LIBEXECDIR\@/$libexecdir/;
  $_ =~ s/\@MANDIR\@/$mandir/;
  $_ =~ s/\@SBINDIR\@/$sbindir/;
  $_ =~ s/\@SHAREDIR\@/$sharedir/;
  $_ =~ s/\@FENCE_AGENTS\@/$fence_agents/;
  $_ =~ s/\@ENABLE_XEN\@/$enable_xen/;
  $_ =~ s/\@DISABLE_CCS\@/$without_ccs/;
  $_ =~ s/\@DISABLE_CMAN\@/$without_cman/;
  $_ =~ s/\@DISABLE_DLM\@/$without_dlm/;
  $_ =~ s/\@DISABLE_GROUP\@/$without_group/;
  $_ =~ s/\@DISABLE_FENCE\@/$without_fence/;
  $_ =~ s/\@DISABLE_GFS\@/$without_gfs/;
  $_ =~ s/\@DISABLE_GFS2\@/$without_gfs2/;
  $_ =~ s/\@DISABLE_GNBD\@/$without_gnbd/;
  $_ =~ s/\@DISABLE_RGMANAGER\@/$without_rgmanager/;

  print OFILE "$_\n";
}

close IFILE;
if ((not length $release_major) || (not length $release_minor)) {
  open IFILE, "<make/release.mk.input" or die "Can't redirect stdin";
  while (<IFILE>) {
    chomp;
    if($_ =~ /RELEASE_MAJOR\s=\s(.*)/){
        $release_major = $1;
    } elsif($_ =~ /RELEASE_MINOR\s=\s(.*)/){
        $release_minor = $1;
    }
  }

  if($release_minor =~ m/DATE/i){
      $release_minor = `date +%s`;
      chomp $release_minor;
  }
}

print OFILE "RELEASE_MAJOR = $release_major\n";
print OFILE "RELEASE_MINOR = $release_minor\n";
print OFILE "RELEASE_VERSION = $release_major.$release_minor\n";
print OFILE "CFLAGS += -DRELEASE_VERSION=\\\"$release_major.$release_minor\\\"\n";
close OFILE;

print "Completed Makefile configuration\n\n";
