# This Source Code Form is subject to the terms of the Mozilla Public License,
# v. 2.0. If a copy of the MPL was not distributed with this file, You can
# obtain one at https://mozilla.org/MPL/2.0/.

require 'pathname'
require 'rake/clean'

TMP = Pathname.new('./build')
HOST_INSTALL = TMP + 'host/install'

CLOBBER.include TMP
CLEAN.include(TMP + 'boot')

directory HOST_INSTALL

task default: ['source/main.elna', TMP + 'boot/elna'] do |t|
  sources, compiler  = t.prerequisites.partition { |f| f.end_with? '.elna' }

  sh *compiler, '--parse', *sources
end

rule(/boot\/.+\.o$/ => ->(file) {
  source = Pathname.new('source') +
    Pathname.new(file).relative_path_from(TMP + 'boot').sub_ext('.elna')

  [HOST_INSTALL + 'bin/gelna', source]
}) do |t|
  Pathname.new(t.name).dirname.mkpath
  sources, compiler = t.prerequisites.partition { |source| source.end_with? '.elna' }

  sh *compiler, '-c', '-O0', '-g', '-o', t.name, *sources
end

file TMP + 'boot/elna' => FileList['source/**/*.elna'].reject { |file|
  file != file.downcase
}.map { |file|
  TMP + 'boot' +
    Pathname.new(file).relative_path_from('source').sub_ext('.o')
} do |t|
  compiler = HOST_INSTALL + 'bin/gcc'

  sh compiler.to_path, '-o', t.name, *t.prerequisites
end