# -*- coding: utf-8 -*-
# -*- ruby -*-

require 'rubygems'
require 'hoe'
require 'rake/extensiontask'
require 'rake/extensioncompiler'
require 'uri'
require "rbconfig"

ENV['RUBY_CC_VERSION'] ||= '1.8.7:1.9.2'

# Cross-compilation constants
COMPILE_HOME               = Pathname( "build" ).expand_path
STATIC_SOURCESDIR          = COMPILE_HOME + 'sources'
STATIC_BUILDDIR            = COMPILE_HOME + 'builds'
STATIC_INSTALLDIR          = COMPILE_HOME + 'install'
RUBY_BUILD                 = RbConfig::CONFIG["host"]
CROSS_PREFIX = if RUBY_PLATFORM.include?( 'darwin' )
    'i386-mingw32'
else
    'i586-mingw32msvc'
end

NUM_CPUS = if File.exist?('/proc/cpuinfo')
    File.read('/proc/cpuinfo').scan('processor').length
elsif RUBY_PLATFORM.include?( 'darwin' )
    `system_profiler SPHardwareDataType | grep 'Cores' | awk '{print $5}'`.chomp
else
    1
end


# Fetch zlib tarball
LIBZ_VERSION            = ENV['LIBZ_VERSION'] || '1.2.5'
LIBZ_SOURCE_URI         = URI( "http://zlib.net/zlib-#{LIBZ_VERSION}.tar.bz2" )
LIBZ_TARBALL            = STATIC_SOURCESDIR + File.basename( LIBZ_SOURCE_URI.path )
STATIC_LIBZ_BUILDDIR    = STATIC_BUILDDIR + LIBZ_TARBALL.basename(".tar.bz2")
LIBZ_MAKEFILE           = STATIC_LIBZ_BUILDDIR + 'Makefile'
LIBZ_A                  = STATIC_INSTALLDIR + 'libz.a'

# Fetch libpng tarball
LIBPNG_VERSION            = ENV['LIBPNG_VERSION'] || '1.5.4'
LIBPNG_SOURCE_URI         = URI( "http://prdownloads.sourceforge.net/libpng/libpng-#{LIBPNG_VERSION}.tar.gz?download" )
LIBPNG_TARBALL            = STATIC_SOURCESDIR + File.basename( LIBPNG_SOURCE_URI.path )
STATIC_LIBPNG_BUILDDIR    = STATIC_BUILDDIR + LIBPNG_TARBALL.basename(".tar.gz")
LIBPNG_MAKEFILE           = STATIC_LIBPNG_BUILDDIR + 'Makefile'
LIBPNG_A                  = STATIC_INSTALLDIR + 'libpng.a'


# Fetch libjpeg tarball
LIBJPEG_VERSION            = ENV['LIBJPEG_VERSION'] || '8c'
LIBJPEG_SOURCE_URI         = URI( "http://www.ijg.org/files/jpegsrc.v#{LIBJPEG_VERSION}.tar.gz" )
LIBJPEG_TARBALL            = STATIC_SOURCESDIR + File.basename( LIBJPEG_SOURCE_URI.path )
STATIC_LIBJPEG_BUILDDIR    = STATIC_BUILDDIR + "jpeg-#{LIBJPEG_VERSION}"
LIBJPEG_MAKEFILE           = STATIC_LIBJPEG_BUILDDIR + 'Makefile'
LIBJPEG_A                  = STATIC_INSTALLDIR + 'libjpeg.a'


# Fetch libtiff tarball
LIBTIFF_VERSION            = ENV['LIBTIFF_VERSION'] || '3.9.5'
LIBTIFF_SOURCE_URI         = URI( "http://download.osgeo.org/libtiff/tiff-#{LIBTIFF_VERSION}.tar.gz" )
LIBTIFF_TARBALL            = STATIC_SOURCESDIR + File.basename( LIBTIFF_SOURCE_URI.path )
STATIC_LIBTIFF_BUILDDIR    = STATIC_BUILDDIR + LIBTIFF_TARBALL.basename(".tar.gz")
LIBTIFF_MAKEFILE           = STATIC_LIBTIFF_BUILDDIR + 'Makefile'
LIBTIFF_A                  = STATIC_INSTALLDIR + 'libtiff.a'


# Fetch libfox tarball
LIBFOX_VERSION            = ENV['LIBFOX_VERSION'] || '1.6.44'
LIBFOX_SOURCE_URI         = URI( "http://ftp.fox-toolkit.org/pub/fox-#{LIBFOX_VERSION}.tar.gz" )
LIBFOX_TARBALL            = STATIC_SOURCESDIR + File.basename( LIBFOX_SOURCE_URI.path )
STATIC_LIBFOX_BUILDDIR    = STATIC_BUILDDIR + LIBFOX_TARBALL.basename(".tar.gz")
LIBFOX_MAKEFILE           = STATIC_LIBFOX_BUILDDIR + 'Makefile'
LIBFOX_A                  = STATIC_INSTALLDIR + 'libfox.a'

# Fetch fxscintilla tarball
LIBFXSCINTILLA_VERSION            = ENV['LIBFXSCINTILLA_VERSION'] || '2.28.0'
LIBFXSCINTILLA_SOURCE_URI         = URI( "http://download.savannah.gnu.org/releases/fxscintilla/fxscintilla-#{LIBFXSCINTILLA_VERSION}.tar.gz" )
LIBFXSCINTILLA_TARBALL            = STATIC_SOURCESDIR + File.basename( LIBFXSCINTILLA_SOURCE_URI.path )
STATIC_LIBFXSCINTILLA_BUILDDIR    = STATIC_BUILDDIR + LIBFXSCINTILLA_TARBALL.basename(".tar.gz")
LIBFXSCINTILLA_MAKEFILE           = STATIC_LIBFXSCINTILLA_BUILDDIR + 'Makefile'
LIBFXSCINTILLA_A                  = STATIC_INSTALLDIR + 'libfxscintilla.a'



# clean intermediate files and folders
CLEAN.include( STATIC_BUILDDIR.to_s )

#####################################################################
### C R O S S - C O M P I L A T I O N - T A S K S
#####################################################################


directory STATIC_SOURCESDIR.to_s

#
# Static libz build tasks
#
directory STATIC_LIBZ_BUILDDIR.to_s

# libz source file should be stored there
file LIBZ_TARBALL => STATIC_SOURCESDIR do |t|
  # download the source file using wget or curl
  chdir File.dirname(t.name) do
    sh "wget '#{LIBZ_SOURCE_URI}' -O #{LIBZ_TARBALL}"
  end
end

# Extract the libz builds
file STATIC_LIBZ_BUILDDIR => LIBZ_TARBALL do |t|
  sh 'tar', '-xjf', LIBZ_TARBALL.to_s, '-C', STATIC_LIBZ_BUILDDIR.parent.to_s
end

LIBZ_ENV = [
  "CC=#{CROSS_PREFIX}-gcc",
  "AR=#{CROSS_PREFIX}-ar",
  "RANLIB=#{CROSS_PREFIX}-ranlib",
]

# generate the makefile in a clean build location
task LIBZ_MAKEFILE => [STATIC_LIBZ_BUILDDIR] do |t|
  Dir.chdir( STATIC_LIBZ_BUILDDIR ) do
    options = [
      "--prefix=#{STATIC_INSTALLDIR}",
    ]

    configure_path = STATIC_LIBZ_BUILDDIR + 'configure'
    sh "env #{[LIBZ_ENV, configure_path.to_s, *options].join(" ")}"
  end
end

# generate the makefile in a clean build location
task LIBZ_A => LIBZ_MAKEFILE do |t|
  Dir.chdir( STATIC_LIBZ_BUILDDIR ) do
    sh "make -j#{NUM_CPUS} install 'LDSHAREDLIBC=-lmsvcrt'"
  end
end

#
# Static libpng build tasks
#
directory STATIC_LIBPNG_BUILDDIR.to_s

# libpng source file should be stored there
file LIBPNG_TARBALL => STATIC_SOURCESDIR do |t|
  # download the source file using wget or curl
  chdir File.dirname(t.name) do
    sh "wget '#{LIBPNG_SOURCE_URI}' -O #{LIBPNG_TARBALL}"
  end
end

# Extract the libpng builds
file STATIC_LIBPNG_BUILDDIR => LIBPNG_TARBALL do |t|
  sh 'tar', '-xzf', LIBPNG_TARBALL.to_s, '-C', STATIC_LIBPNG_BUILDDIR.parent.to_s
end

LIBPNG_ENV = [
  "'CPPFLAGS=-I#{STATIC_INSTALLDIR}/include'",
  "'LDFLAGS=-L#{STATIC_INSTALLDIR}/lib'",
]
# generate the makefile in a clean build location
file LIBPNG_MAKEFILE => [STATIC_LIBPNG_BUILDDIR, LIBZ_A] do |t|
  Dir.chdir( STATIC_LIBPNG_BUILDDIR ) do
    options = [
      '--target=i386-mingw32',
      "--host=#{Rake::ExtensionCompiler.mingw_host}",
      "--build=#{RUBY_BUILD}",
      "--prefix=#{STATIC_INSTALLDIR}",
      "--disable-shared",
    ]

    configure_path = STATIC_LIBPNG_BUILDDIR + 'configure'
    sh "env #{[LIBPNG_ENV, configure_path.to_s, *options].join(" ")}"
  end
end

# generate the makefile in a clean build location
task LIBPNG_A => [LIBPNG_MAKEFILE, LIBZ_A] do |t|
  Dir.chdir( STATIC_LIBPNG_BUILDDIR ) do
    sh "make -j#{NUM_CPUS} install"
  end
end

#
# Static libjpeg build tasks
#
directory STATIC_LIBJPEG_BUILDDIR.to_s

# libjpeg source file should be stored there
file LIBJPEG_TARBALL => STATIC_SOURCESDIR do |t|
  # download the source file using wget or curl
  chdir File.dirname(t.name) do
    sh "wget '#{LIBJPEG_SOURCE_URI}' -O #{LIBJPEG_TARBALL}"
  end
end

# Extract the libjpeg builds
file STATIC_LIBJPEG_BUILDDIR => LIBJPEG_TARBALL do |t|
  sh 'tar', '-xzf', LIBJPEG_TARBALL.to_s, '-C', STATIC_LIBJPEG_BUILDDIR.parent.to_s
end

# generate the makefile in a clean build location
file LIBJPEG_MAKEFILE => STATIC_LIBJPEG_BUILDDIR do |t|
  Dir.chdir( STATIC_LIBJPEG_BUILDDIR ) do
    options = [
      '--target=i386-mingw32',
      "--host=#{Rake::ExtensionCompiler.mingw_host}",
      "--build=#{RUBY_BUILD}",
      "--prefix=#{STATIC_INSTALLDIR}",
      "--disable-shared",
    ]

    configure_path = STATIC_LIBJPEG_BUILDDIR + 'configure'
    cmd = [ configure_path.to_s, *options ]
    sh *cmd
  end
end

# build libjpeg.a
task LIBJPEG_A => [LIBJPEG_MAKEFILE] do |t|
  Dir.chdir( STATIC_LIBJPEG_BUILDDIR ) do
    sh "make -j#{NUM_CPUS} install"
  end
end

#
# Static libtiff build tasks
#
directory STATIC_LIBTIFF_BUILDDIR.to_s

# libtiff source file should be stored there
file LIBTIFF_TARBALL => STATIC_SOURCESDIR do |t|
  # download the source file using wget or curl
  chdir File.dirname(t.name) do
    sh "wget '#{LIBTIFF_SOURCE_URI}' -O #{LIBTIFF_TARBALL}"
  end
end

# Extract the libtiff builds
file STATIC_LIBTIFF_BUILDDIR => LIBTIFF_TARBALL do |t|
  sh 'tar', '-xzf', LIBTIFF_TARBALL.to_s, '-C', STATIC_LIBTIFF_BUILDDIR.parent.to_s
end

LIBTIFF_ENV = [
  "'CPPFLAGS=-I#{STATIC_INSTALLDIR}/include'",
  "'LDFLAGS=-L#{STATIC_INSTALLDIR}/lib'",
]

# generate the makefile in a clean build location
file LIBTIFF_MAKEFILE => [STATIC_LIBTIFF_BUILDDIR, LIBJPEG_A, LIBZ_A] do |t|
  Dir.chdir( STATIC_LIBTIFF_BUILDDIR ) do
    options = [
      '--target=i386-mingw32',
      "--host=#{Rake::ExtensionCompiler.mingw_host}",
      "--build=#{RUBY_BUILD}",
      "--prefix=#{STATIC_INSTALLDIR}",
      "--disable-shared",
      "--with-zlib-include-dir=#{STATIC_LIBZ_BUILDDIR}",
      "--with-zlib-lib-dir=#{File.dirname(LIBZ_A)}",
      "--with-jpeg-include-dir=#{STATIC_LIBJPEG_BUILDDIR}",
      "--with-jpeg-lib-dir=#{File.dirname(LIBJPEG_A)}",
    ]

    configure_path = STATIC_LIBTIFF_BUILDDIR + 'configure'
    sh "env #{[LIBTIFF_ENV, configure_path.to_s, *options].join(" ")}"
  end
end

# build libtiff.a
task LIBTIFF_A => [LIBTIFF_MAKEFILE] do |t|
  Dir.chdir( STATIC_LIBTIFF_BUILDDIR ) do
    sh "make -j#{NUM_CPUS} install"
  end
end


#
# Static libfox build tasks
#
directory STATIC_LIBFOX_BUILDDIR.to_s

# libfox source file should be stored there
file LIBFOX_TARBALL => STATIC_SOURCESDIR do |t|
  # download the source file using wget or curl
  chdir File.dirname(t.name) do
    sh "wget '#{LIBFOX_SOURCE_URI}' -O #{LIBFOX_TARBALL}"
  end
end

# Extract the libfox builds
file STATIC_LIBFOX_BUILDDIR => LIBFOX_TARBALL do |t|
  sh 'tar', '-xzf', LIBFOX_TARBALL.to_s, '-C', STATIC_LIBFOX_BUILDDIR.parent.to_s
end

LIBFOX_ENV = [
  "'CPPFLAGS=-I#{STATIC_INSTALLDIR}/include'",
  "'LDFLAGS=-L#{STATIC_INSTALLDIR}/lib'",
]

# generate the makefile in a clean build location
file LIBFOX_MAKEFILE => [STATIC_LIBFOX_BUILDDIR, LIBJPEG_A, LIBZ_A] do |t|
  Dir.chdir( STATIC_LIBFOX_BUILDDIR ) do
    options = [
      '--target=i386-mingw32',
      "--host=#{Rake::ExtensionCompiler.mingw_host}",
      "--build=#{RUBY_BUILD}",
      "--prefix=#{STATIC_INSTALLDIR}",
      "--disable-shared",
      "--without-xft",
      "--without-x",
    ]

    configure_path = STATIC_LIBFOX_BUILDDIR + 'configure'
    sh "env #{[LIBFOX_ENV, configure_path.to_s, *options].join(" ")}"
  end
end

# build libfox.a
task LIBFOX_A => [LIBFOX_MAKEFILE] do |t|
  Dir.chdir( STATIC_LIBFOX_BUILDDIR ) do
    sh "make -j#{NUM_CPUS} #{FOX_ENV.join(" ")} install"
  end
end


#
# Static libfxscintilla build tasks
#
directory STATIC_LIBFXSCINTILLA_BUILDDIR.to_s

# libfxscintilla source file should be stored there
file LIBFXSCINTILLA_TARBALL => STATIC_SOURCESDIR do |t|
  # download the source file using wget or curl
  chdir File.dirname(t.name) do
    sh "wget '#{LIBFXSCINTILLA_SOURCE_URI}' -O #{LIBFXSCINTILLA_TARBALL}"
  end
end

# Extract the libfxscintilla builds
file STATIC_LIBFXSCINTILLA_BUILDDIR => LIBFXSCINTILLA_TARBALL do |t|
  sh 'tar', '-xzf', LIBFXSCINTILLA_TARBALL.to_s, '-C', STATIC_LIBFXSCINTILLA_BUILDDIR.parent.to_s
end

FOX_ENV = [
  "'CFLAGS=-I#{STATIC_INSTALLDIR}/include'",
  "'CPPFLAGS=-I#{STATIC_INSTALLDIR}/include'",
  "'LDFLAGS=-L#{STATIC_INSTALLDIR}/lib'",
  "'FOX_CFLAGS=-I#{STATIC_INSTALLDIR}/include/fox-1.6 -DFOX_1_6'",
  "'FOX_LIBS=-L#{STATIC_INSTALLDIR}/lib -lFOX-1.6'",
]

# generate the makefile in a clean build location
file LIBFXSCINTILLA_MAKEFILE => [STATIC_LIBFXSCINTILLA_BUILDDIR, LIBJPEG_A, LIBZ_A] do |t|
  Dir.chdir( STATIC_LIBFXSCINTILLA_BUILDDIR ) do
    options = [
      '--target=i386-mingw32',
      "--host=#{Rake::ExtensionCompiler.mingw_host}",
      "--build=#{RUBY_BUILD}",
      "--prefix=#{STATIC_INSTALLDIR}",
      "--disable-shared",
    ]

    configure_path = STATIC_LIBFXSCINTILLA_BUILDDIR + 'configure'
    sh "env #{[FOX_ENV, configure_path.to_s, *options].join(" ")}"
  end
end

# build libfxscintilla.a
task LIBFXSCINTILLA_A => [LIBFXSCINTILLA_MAKEFILE] do |t|
  Dir.chdir( STATIC_LIBFXSCINTILLA_BUILDDIR ) do
    sh "make -j#{NUM_CPUS} #{FOX_ENV.join(" ")} install"
  end
end



desc "compile static libz libraries"
task :static_libs => [ LIBZ_A, LIBPNG_A, LIBJPEG_A, LIBTIFF_A, LIBFOX_A, LIBFXSCINTILLA_A ]

desc 'cross compile required libs for win32'
task :cross => [ :mingw32, :static_libs ]

task :mingw32 do
  # Use Rake::ExtensionCompiler helpers to find the proper host
  unless Rake::ExtensionCompiler.mingw_host then
    warn "You need to install mingw32 cross compile functionality to be able to continue."
    warn "Please refer to your distribution/package manager documentation about installation."
    fail
  end
end


# vim: syntax=ruby