desc "Compile project"

task :'compile' => :'compile:all'

STX_TOP_DIR = BUILD_DIR / 'stx'

STX_CONF_DIR = BUILD_DIR

STX_RULES_DIR = BUILD_DIR / '..' / 'makelib'

if win32?

  STC = STX_TOP_DIR / 'stc' / 'stc.exe'

  LIBRUN = STX_TOP_DIR / 'librun' / 'objmingw' / 'librun.dll'

else

  STC = STX_TOP_DIR / 'stc' / 'stc'

  LIBRUN = STX_TOP_DIR / 'librun' / 'librun.so'

end

# Return true if stx:stc and stx:librun sources should be removed as soon 

# as STC or librun is built. False otherwise (sources are not removed by 

# rakefiles)

#

# Indeed this is a feeble protection as it's easy to trick this method. But 

# the goal is not to protect sources but rather have a secondaty measure to

# avoid sources to leak (for exaple, due to a bug in packaging scripts).

# Unathorized subjects should not be able to checkout sources in first instance.

def should_remove_librun_and_stc_sources

    return ! (core_developer? or ENV['RETAIN_STX_AND_LIBRUN_SOURCE'] == 'yespleaseretain!')

end

def rm_rf_all_in_except(directory, exceptions = [])

  if File.directory? directory then

    Dir.foreach(directory) do | each |

      if each != '.' and each != '..' and not exceptions.include? each

        rm_rf File.join(directory, each)

      end

    end

  else

    rm_f directory

  end

end

if unix? 

  STC_BINARY_FILES = [    

    'cpu_alpha.h',

    'cpu_arm.h',

    'cpu_hppa.h',

    'cpu_i386.h',

    'cpu_x86_64.h',

    'cpu_ia64.h',

    'cpu_mc68k.h',

    'cpu_mc88k.h',

    'cpu_mips.h',

    'cpu_ns32k.h',

    'cpu_power.h',

    'cpu_s390.h',

    'cpu_sparc.h',

    'cpu_vax.h',

    'stc.h',

    'stcIntern.h',

    'stcVMdata.h',

    'stcVMoffsets.h',

    'stxAsmMacros.h',

    'stxNames.h',

    'stxOSDefs.h',

    'stxTypeMacros.h',     

    'symbols.stc.seed',

    'version.h',

    'README',

    #unix specific

    'stx-config.sh',

    'linuxIntern.h',

    'macIntern.h',        

    'Make.proto',

    'stc',

    'stc.1',    

  ]

  LIBRUN_BINARY_FILES1 = [    

    'libffi-3.2.1',

    'md5.h',

    'mcompiler.h',

    'main.c',

    'librun.so',

    'librun.a',

    'symlist.c',

    'Make.proto',

    'makefile',

  ]

  LIBRUN_BINARY_FILES2 = []

elsif win32?

  STC_BINARY_FILES = [    

    'cpu_alpha.h',

    'cpu_arm.h',

    'cpu_hppa.h',

    'cpu_i386.h',

    'cpu_x86_64.h',

    'cpu_ia64.h',

    'cpu_mc68k.h',

    'cpu_mc88k.h',

    'cpu_mips.h',

    'cpu_ns32k.h',

    'cpu_power.h',

    'cpu_s390.h',

    'cpu_sparc.h',

    'cpu_vax.h',

    'stc.h',

    'stcIntern.h',

    'stcVMdata.h',

    'stcVMoffsets.h',

    'stxAsmMacros.h',

    'stxNames.h',

    'stxOSDefs.h',

    'stxTypeMacros.h', 

    'symbols.stc.seed',

    'version.h',

    'README',

    #windows specific

    'stx-config.bat',

    'mingwmake.bat',

    'ntIntern.h',

    'nt.h',

    'Make.proto',

    'stc.exe',

  ]  

  LIBRUN_BINARY_FILES1 = [    

    'libffi-3.2.1',

    'md5.h',

    'mcompiler.h',

    'main.c',

    'objmingw', 

    'bc.mak',

    'mingwmake.bat',

    'buildDate.h',

    'genDate.com',

  ]

  LIBRUN_BINARY_FILES2 = [

    'librun.dll',

    'librun.lib',

  ]

else

  raise Exception.new("Unsupported platform")

end

def cleanup_stc()  

  if should_remove_librun_and_stc_sources()

    puts "Cleaning up stc..."

    begin

      rm_rf_all_in_except(STX_TOP_DIR / 'stc', STC_BINARY_FILES)    

    rescue

      # When something goes wrong, be safe and remove whole directory

      rm_rf STX_TOP_DIR / 'stc'

    end

  end

end

def cleanup_librun()

  if should_remove_librun_and_stc_sources()

    puts "Cleaning up librun..."

    begin

      rm_rf_all_in_except(STX_TOP_DIR / 'librun', LIBRUN_BINARY_FILES1)

      if win32? then

        rm_rf_all_in_except(STX_TOP_DIR / 'librun' / 'objmingw', LIBRUN_BINARY_FILES2)

      end

    rescue

      # When something goes wrong, be safe and remove whole directory

      rm_rf STX_TOP_DIR / 'librun'

    end      

  end

end

# Setup flags for GCC (both, real GCC and MinGW)

GCC_CFLAGS_OPT = ARCH == 'i386' ? '-O' : ''

GCC_CFLAGS_DBG = core_developer? ? '-ggdb3' : ''

GCC_CFLAGS_PIC = win32? ? '' : '-fPIC'

GCC_CFLAGS = "-pipe -fno-omit-frame-pointer -fno-stack-protector -fno-strict-aliasing -fwrapv #{GCC_CFLAGS_PIC} #{GCC_CFLAGS_OPT} #{GCC_CFLAGS_DBG}"

# Sigh, for MINGW 5.x.x coming with MSYS2 we have to force C language as 

# Borland make and build files are using funny suffixes to confuse GCC's 

# language detection. Triple sigh here!

GCC_CFLAGS += " -x c" if win32?

namespace :'compile' do

  task :'all' => [ :'prereq', :'pre', :'main', :'post' ]

  task :'pre'

  task :'post'

  task :'prereq' => [ :'setup' ]

  task :'main' => [ 

        :'config',

        :'libraries',

        :'stc',       

        :'librun',        

        :'application',                

      ]      

  task :'config' => [ STX_TOP_DIR / 'include' ]

  directory STX_TOP_DIR / 'include'

  task :'application' => :'setup:dependencies'

  task :'config' => [ STX_CONF_DIR / 'stx-config.make' ]

  directory STX_CONF_DIR do 

    mkdir_p STX_CONF_DIR

  end

  file STX_CONF_DIR / 'stx-config.make' => STX_CONF_DIR  do

    makelib_dir = Pathname.new(File.expand_path('makelib')).relative_path_from(Pathname.new(BUILD_DIR / 'stx' ))

    os = nil

    case 

    when linux? 

      os = 'linux'

    when win32?

      os = 'mingw32'

    else

      raise Exception.new("Unssuported operating system")

    end

    File.open(STX_CONF_DIR / 'stx-config.make', "w") do | f |

      f.puts "BUILD_TARGET ?= #{os}-#{ARCH}"

    end

  end 

  rule 'makefile' do | t |  

    chdir File.dirname(t.name) do

      sh "'#{STX_TOP_DIR / 'rules' / 'stmkmf'}'"

    end

  end

  task :stc do

    if linux? and x86_64? and ARCH == 'i386'

      stx_make_flags="STC_LEXLIB=libfl/libfl_pic.a"

    else

      stx_make_flags=""

    end

    chdir STX_TOP_DIR / 'stc' do      

      begin

        make stx_make_flags

        cleanup_stc()

      rescue Exception => e

        cleanup_stc()

        cleanup_librun()

        error "Cannot compile stx:stc: #{e.description}"

      end  

    end

    if not File.exist? STX_TOP_DIR / 'include' / 'stx-config.h' then

      cp STX_TOP_DIR / 'stc' / 'stx-config.h' , STX_TOP_DIR / 'include' / 'stx-config.h'

    end

    if not File.exist? STC

      cleanup_stc()

      cleanup_librun()

      error "Cannot compile stx:stc"

    end

  end

 task :librun do

    chdir STX_TOP_DIR / 'librun' do

      begin

        begin

            if win32_wine?

              if not File.exist? 'libffi' / 'build_win32' / 'objbc'

                mkdir 'libffi' / 'build_win32' / 'objbc'

              end

            end

          # A workaround for Windows 10 & ancient Borland make which 

          # tend to crash there when trying to recompile already compiled

          # librun. Sigh, we have to move away from it as soon as possible!

          if win32? and (File.exist? 'stxmain.c') then

            touch "stxmain.c"

          end

          make

          cleanup_librun()

        rescue Exception => e

          cleanup_stc()

          cleanup_librun()

          error "Cannot compile stx:librun: #{e.description}"

        end

      end

    end

  end

  if unix?

    task :stc => STX_TOP_DIR / 'stc' / 'makefile'

    task :librun => STX_TOP_DIR / 'librun' / 'makefile'

  end

  if win32? and TOOLCHAIN == 'bcc'

    directory STX_TOP_DIR / 'lib' / 'bc'

    task :librun => STX_TOP_DIR / 'lib' / 'bc'

  end

  task :'libraries'

  if unix?

    vogl_dir = STX_TOP_DIR / 'support' / 'VGL' / 'vogl'

    task 'libraries' => [ vogl_dir / 'src' / 'libvogl.a' ]

    file vogl_dir / 'src' / 'libvogl.a' => [ vogl_dir / 'makefile'  ] do

      chdir STX_TOP_DIR / 'support' / 'VGL' / 'vogl' do

        make

      end

    end

  end

end

task "stx:librun:symbols"

#

# Various compilation hacks here and there (sigh)

# 

desc "Update the VM symbol database"

task 'stx:librun:symbols' do | task |    

  symbols_stc = BUILD_DIR / 'stx' / 'include' / 'symbols.stc'

  if unix?

    # UNIX VMs have the symbol database built into the binary as

    # static data so we need to recompile the VM

    stx_librun = project.package('stx:librun')

    stx_librun_dll = BUILD_DIR / stx_librun.directory() / OBJ_DIR / stx_librun.dll_name()

    if not uptodate?(stx_librun_dll, [ symbols_stc ]) then

      Rake::Task["stx:librun"].reenable()

      Rake::Task["stx:librun"].invoke()

    end

  elsif win32? 

    # Windows VM reads the symbol database from a file `symbols.stc` located

    # alongside the program executable so we need to copy that file

    app = project.application

    symbols_stc_in_app_directory = BUILD_DIR / app.directory() / 'symbols.stc'

    if not uptodate?(symbols_stc_in_app_directory, [ symbols_stc ]) then

      cp symbols_stc, symbols_stc_in_app_directory

    end

  end

  task.reenable()

end

if unix?

  # A hack for Debian (and possibly other Linux distros) that does not ship

  # 32bit libodbc.a / libodbcinst.a. Link directly against .so

  task :'stx:libdb/libodbc:pre' do     

	  sed('-lodbc -lodbcinst' , '-l:libodbc.so.2 -l:libodbcinst.so.2', BUILD_DIR / 'stx' / 'libdb' / 'libodbc' / 'Make.proto', true)

  end  

end