require 'package'

class Expat < Package
  description 'James Clark\'s Expat XML parser library in C.'
  homepage 'https://github.com/libexpat/libexpat'
  version '2.6.2'
  license 'MIT'
  compatibility 'all'
  source_url 'https://github.com/libexpat/libexpat.git'
  git_hashtag "R_#{version.gsub('.', '_')}"
  binary_compression 'tar.zst'

  binary_sha256({
    aarch64: '05ab05cd431d91d40d7b5d328ecc9eeb16b794585d47e8250d0e7cba463731a7',
     armv7l: '05ab05cd431d91d40d7b5d328ecc9eeb16b794585d47e8250d0e7cba463731a7',
       i686: '3595fcfc0f2fa0501a69cb57823fb5a100540725dd519b444389bcfa431187e1',
     x86_64: 'c3d018812a6434a6e0639be52434a3a45bdab4defd511c12d7c3c65c9434976e'
  })

  depends_on 'glibc' # R

  def self.build
    Dir.chdir('expat') do
      system "mold -run cmake -B builddir #{CREW_CMAKE_OPTIONS} \
          -DEXPAT_BUILD_EXAMPLES=OFF \
          -DBUILD_SHARED_LIBS=ON \
          -Wno-dev \
          -G Ninja"
      system "mold -run #{CREW_NINJA} -C builddir"
    end
  end

  def self.check
    Dir.chdir('expat') do
      system "mold -run #{CREW_NINJA} -C builddir test"
    end
  end

  def self.install
    Dir.chdir('expat') do
      system "DESTDIR=#{CREW_DEST_DIR} #{CREW_NINJA} -C builddir install"
    end

    # Imagemagick7 wants a libtool file from expat.
    @libname = name.to_s.start_with?('lib') ? name.downcase : "lib#{name.downcase}"
    @libnames = Dir["#{CREW_DEST_LIB_PREFIX}/#{@libname}.so*"]
    @libnames = Dir["#{CREW_DEST_LIB_PREFIX}/#{@libname}-*.so*"] if @libnames.empty?
    @libnames.each do |s|
      s.gsub!("#{CREW_DEST_LIB_PREFIX}/", '')
    end
    @dlname = @libnames.grep(/.so./).first
    @libname = @dlname.gsub(/.so.\d+/, '')
    @longest_libname = @libnames.max_by(&:length)
    @libvars = @longest_libname.rpartition('.so.')[2].split('.')
    @libtool_file = <<~LIBTOOLEOF
      # #{@libname}.la - a libtool library file
      # Generated by libtool (GNU libtool) (Created by Chromebrew)
      #
      # Please DO NOT delete this file!
      # It is necessary for linking the library.

      # The name that we can dlopen(3).
      dlname='#{@dlname}'

      # Names of this library.
      library_names='#{@libnames.reverse.join(' ')}'

      # The name of the static archive.
      old_library='#{@libname}.a'

      # Linker flags that cannot go in dependency_libs.
      inherited_linker_flags=''

      # Libraries that this one depends upon.
      dependency_libs=''

      # Names of additional weak libraries provided by this library
      weak_library_names=''

      # Version information for #{name}.
      current=#{@libvars[1]}
      age=#{@libvars[1]}
      revision=#{@libvars[2]}

      # Is this an already installed library?
      installed=yes

      # Should we warn about portability when linking against -modules?
      shouldnotlink=no

      # Files to dlopen/dlpreopen
      dlopen=''
      dlpreopen=''

      # Directory that this library needs to be installed in:
      libdir='#{CREW_LIB_PREFIX}'
    LIBTOOLEOF
    File.write("#{CREW_DEST_LIB_PREFIX}/#{@libname}.la", @libtool_file)
  end
end