#! /usr/local/bin/ruby
# -*- ruby -*-

$force_static = nil
$install = nil
$destdir = nil
$clean = nil
$nodynamic = nil
$extinit = nil
$extobjs = nil
$ignore = nil
$message = nil
$use_no_undef = nil

$progname = $0
alias $PROGRAM_NAME $0
alias $0 $progname

$extlist = []

$:.replace ["."]
require 'rbconfig'

srcdir = Config::CONFIG["srcdir"]

$:.replace [srcdir, srcdir+"/lib", "."]

require 'mkmf'
require 'ftools'
require 'shellwords'
require 'getopts'

$topdir = File.expand_path(".")
$top_srcdir = srcdir
$hdrdir = $top_srcdir

if not $use_no_undef and /linux/ =~ RUBY_PLATFORM and
   $configure_args['--enable-shared'] and
   CONFIG["GNU_LD"] == "yes"
  $use_no_undef = 0 <= (`ld -v`.scan(/\d+/).map{|x| x.to_i} <=> [2, 11])
end

def sysquote(x)
  @quote ||= /human|os2|macos/ =~ (CROSS_COMPILING || RUBY_PLATFORM)
  @quote ? x.quote : x
end

def extmake(target)
  print "#{$message} #{target}\n"
  $stdout.flush
  if $force_static or $static_ext[target]
    $static = target
  else
    $static = false
  end

  unless $ignore
    return true if $nodynamic and not $static
  end

  init_mkmf

  if $use_no_undef
    $DLDFLAGS << " -Wl,--no-undefined"
  end

  begin
    dir = Dir.pwd
    File.mkpath target unless File.directory?(target)
    Dir.chdir target
    $target = target
    $mdir = target
    $srcdir = File.join($top_srcdir, "ext", $mdir)
    unless $ignore
      if $static ||
	older("./Makefile", *MTIMES + %W"#{$srcdir}/makefile.rb #{$srcdir}/extconf.rb")
      then
	$defs = []
	Logging::logfile 'mkmf.log'
	Config::CONFIG["srcdir"] = $srcdir
	begin
	  if File.exist?($0 = "#{$srcdir}/makefile.rb")
	    load $0
	  elsif File.exist?($0 = "#{$srcdir}/extconf.rb")
	    load $0
	  else
	    create_makefile(target)
	  end
	rescue SystemExit
	  # ignore
	ensure
	  rm_f "conftest*"
	  $0 = $PROGRAM_NAME
	  Config::CONFIG["srcdir"] = $top_srcdir
	end
      end
    end
    if File.exist?("./Makefile")
      if $static
	$extlist.push [$static, $target, File.basename($target)]
      end
      unless system($make, *sysquote($mflags))
	$ignore or $continue or return false
      end
    else
      open("./Makefile", "w") {|f|
        f.print dummy_makefile($srcdir)
      }
    end
    if $static
      $extflags ||= ""
      $extlibs ||= ""
      $extflags += " " + $DLDFLAGS if $DLDFLAGS
      $extflags += " " + $LDFLAGS unless $LDFLAGS == ""
      $extlibs += " " + $libs unless $libs == ""
      $extlibs += " " + $LOCAL_LIBS unless $LOCAL_LIBS == ""
    end
  ensure
    Dir.chdir dir
  end
  true
end

def parse_args()
  getopts('n', 'extstatic:', 'dest-dir:',
	  'make:', 'make-flags:', 'mflags:')

  $dryrun = $OPT['n']
  $force_static = $OPT['extstatic'] == 'static'
  $destdir = $OPT['dest-dir'] || ''
  $make = $OPT['make'] || $make || 'make'
  mflags = ($OPT['make-flags'] || '').strip
  mflags = ($OPT['mflags'] || '').strip if mflags.empty?

  $mflags = Shellwords.shellwords(mflags)
  if arg = $mflags.first
    arg.insert(0, '-') if /\A[^-][^=]*\Z/ =~ arg
  end

  $make, *rest = Shellwords.shellwords($make)
  $mflags.unshift(*rest) unless rest.empty?

  def $mflags.set?(flag)
    grep(/\A-(?!-).*#{'%c' % flag}/i) { return true }
    false
  end

  if $mflags.set?(?n)
    $dryrun = true
  else
    $mflags.unshift '-n' if $dryrun
  end

  $continue = $mflags.set?(?k)
  $mflags |= ["DESTDIR=#{$destdir}"]
end

parse_args()

unless $message
  if $message = ARGV.shift and /^[a-z]+$/ =~ $message
    $mflags.push($message)
    $message = $message.sub(/^(?:dist|real)(?=(?:clean)?$)/, '\1')
    case $message
    when "clean"
      $ignore ||= true
    when "install"
      $ignore ||= true
      $mflags.unshift("INSTALL_PROG=install -c -m 0755",
		      "INSTALL_DATA=install -c -m 0644",
		      "MAKEDIRS=mkdir -p") if $dryrun
    end
    $message.sub!(/e?$/, "ing")
  else
    $message = "compiling"
  end
end

EXEEXT = CONFIG['EXEEXT']
if CROSS_COMPILING
  $ruby = CONFIG['MINIRUBY']
elsif $nmake
  $ruby = '$(topdir:/=\\)\\miniruby' + EXEEXT
else
  $ruby = '$(topdir)/miniruby' + EXEEXT
end
$ruby << " -I$(topdir) -I$(hdrdir)/lib"
$config_h = '$(topdir)/config.h'

MTIMES = [File.mtime(__FILE__)]

# get static-link modules
$static_ext = {}
for dir in ["ext", File::join($top_srcdir, "ext")]
  setup = File::join(dir, CONFIG['setup'])
  if File.file? setup
    f = open(setup) 
    while line = f.gets()
      line.chomp!
      line.sub!(/#.*$/, '')
      next if /^\s*$/ =~ line
      target, opt = line.split(nil, 3)
      if target == 'option'
	case opt
	when 'nodynamic'
	  $nodynamic = true
	end
	next
      end
      target = target.downcase if /mswin32|bccwin32/ =~ RUBY_PLATFORM
      $static_ext[target] = true
    end
    MTIMES << f.mtime
    $setup = setup
    f.close
    break
  end
end

File::makedirs('ext')
Dir::chdir('ext')

ext_prefix = "#{$top_srcdir}/ext"
Dir.glob("#{ext_prefix}/**/MANIFEST") do |d|
  d = File.dirname(d)
  d.slice!(0, ext_prefix.length + 1)
  extmake(d) or exit(1)
end

if $ignore
  Dir.chdir ".."
  exit
end

if $extlist.size > 0
  $extinit ||= ""
  $extobjs ||= ""
  for s,t,i in $extlist
    f = format("%s/%s.%s", s, i, $LIBEXT)
    if File.exist?(f)
      $extinit += "\tInit_#{i}();\n\trb_provide(\"#{t}.so\");\n"
      $extobjs += "ext/#{f} "
    end
  end

  src = "void Init_ext() {\n#$extinit}\n"
  if older("extinit.c", *MTIMES) || IO.read("extinit.c") != src
    open("extinit.c", "w") {|f| f.print src}
  end

  $extobjs = "ext/extinit.#{$OBJEXT} " + $extobjs
  if RUBY_PLATFORM =~ /m68k-human|beos/
    $extlibs.gsub!("-L/usr/local/lib", "") if $extlibs
  end
  conf = [
    ['SETUP', $setup], ['EXTOBJS', $extobjs],
    ['EXTLIBS', $extlibs], ['EXTLDFLAGS', $extflags]
  ].map {|n, v|
    "#{n}=#{v}" if v and !(v = v.strip).empty?
  }.compact
  puts conf
  $stdout.flush
  $mflags.concat(conf)
end
rubies = []
%w[RUBY RUBYW].each {|r|
  r = CONFIG[r+"_INSTALL_NAME"] and !r.empty? and rubies << r+EXEEXT
}

Dir.chdir ".."
puts "making #{rubies.join(', ')}"
$stdout.flush
$mflags.concat(rubies)

system($make, *sysquote($mflags)) or exit($?.exitstatus)

#Local variables:
# mode: ruby
#end: