#! /usr/bin/perl

# Perl script to build my code.

use Getopt::Long;

$cmake = `which cmake`;
chomp($cmake);

$optimize = 0;
$help = 0;
$builddir = "build";
$sourcedir = $ENV{'PWD'};
$intel = 0;
$verbose = 0;

$ret = GetOptions( "c=s" => \$cmake, 'o' => \$optimize, 'h|?' => \$help, "b=s" => \$builddir,
	"s=s" => \$sourcedir, 'u' => \$universal, 'i' => \$intel, 'V' => \$verbose );

if ($help || !$ret) {
    print "Build.pl options:\n";

    print "    -b name	build directory (default is \"build\").\n";
    print "    -c file	cmake to use.\n";
    print "    -o		optimized build (default is debug).\n";
    print "    -s name	source directory (default is \$PWD).\n";
    print "    -u		Universal build (Mac only).\n";
    print "    -i		Intel compiler.\n";
    print "    -V		Verbose.\n";
    print "    -h		this help menu.\n";
    exit;
}

# Make sure we have cmake
#
if (! -e $cmake) {
    print "\ncmake not found.\n";
    print "Please install cmake.\n";
    print "http://cmake.org\n\n";
    exit;
}

print "\nSource directory = $sourcedir\n";
print "Build directory = $builddir\n\n";

# Check that there's a cmake file in the source directory
#
if (! -e "$sourcedir/CMakeLists.txt") {
    print "Cannot find CMakeLists.txt in source directory.\n";
    exit;
}

# Created the build directory if needed
#
if (! -e $builddir) 
    { mkdir $builddir; }

chdir $builddir;

# configure the build type
#
if ($optimize) {
    $buildtype = "-D CMAKE_BUILD_TYPE:STRING=Release";
} else {
    $buildtype = "-D CMAKE_BUILD_TYPE:STRING=Debug";
}

# universal build option for Macs
#
if ($universal) {
    $uname = `uname`;
    chomp($uname);
    if ($uname eq "Darwin") {
	$univopt = "-D \"CMAKE_OSX_ARCHITECTURES:STRING=i386;x86_64;ppc;ppc64\"";
    } else {
	print "Ignoring universal option.\n";
    }
}

# invoke the Intel compiler
#
if ($intel) {
    $cxx = "-D \"CMAKE_CXX_COMPILER:FILEPATH=icpc\"";
    $cc = "-D \"CMAKE_CX_COMPILER:FILEPATH=icc\"";
}

# tell cmake to run verbosely
#
if ($verbose) {
    $verb = "-D \"CMAKE_VERBOSE_MAKEFILE:BOOL=TRUE\"";
}

# Run CMake
#
print "\nRunning cmake\n";
$cmd = "$cmake $buildtype $univopt $cxx $cc $verb $sourcedir";
system $cmd;

# getting the number of processors
$nproc = `$sourcedir/bin/nproc`;
chomp($nproc);


print "\nCompiling imodel\n\n";
$cmd = "make -j $nproc";
system $cmd;