require 'package'

# This is needed so the installer finds this glibc version first when it is used in the newer installs.
# rubocop:disable Style/UnlessElse
unless CREW_PRE_GLIBC_STANDALONE
  # rubocop:enable Style/UnlessElse
  class Glibc < Package
    description 'The GNU C Library project provides the core libraries for GNU/Linux systems.'
    homepage 'https://www.gnu.org/software/libc/'
    version '2.41-5'
    license 'LGPL-2.1+, BSD, HPND, ISC, inner-net, rc, and PCRE'
    compatibility 'all'
    source_url 'https://sourceware.org/git/glibc.git'
    git_hashtag '515d4166f4dbcf43b1568e3f63a19d9a92b2d50e' # Build from latest commit in the stable branch.
    # source_url "https://ftpmirror.gnu.org/glibc/glibc-#{version.partition('-')[0]}.tar.xz"
    # source_sha256 'a5a26b22f545d6b7d7b3dd828e11e428f24f4fac43c934fb071b6a7d0828e901'
    binary_compression 'tar.zst'

    binary_sha256({
      aarch64: '8d092cdeeaf3b321b64b31cb76aa3813adf8e73416f4db557d41f0c0811e0131',
       armv7l: '8d092cdeeaf3b321b64b31cb76aa3813adf8e73416f4db557d41f0c0811e0131',
         i686: '8c2430f690f468f33dc849cd0b2163dfadf187ff1cc3e33f1d20cbfb06572ec3',
       x86_64: '50729b68b70aceb95f467812950fc58ec29e3e8b184f95d7c7b4ce7cb2d53946'
    })

    depends_on 'crew_preload' # L
    depends_on 'gawk'    => :build
    depends_on 'libidn2' => :build
    depends_on 'make' => :build
    depends_on 'patchelf' => :build
    depends_on 'texinfo' => :build
    depends_on 'libxcrypt' # Latest glibc removed libcrypt.so, add this for backward compatibility

    conflicts_ok
    no_env_options
    no_shrink
    print_source_bashrc

    def self.patch
      system 'git config --global advice.detachedHead false'
      system "git clone --depth=1 https://github.com/chromebrew/crew-package-glibc -b #{version}"

      Dir.glob('crew-package-glibc/patches/*.patch') do |patch|
        puts "Applying #{patch}...".yellow
        system 'patch', '-p1', '-i', patch
      end
      system 'filefix'

      # These are the only locales we want.
      @locales = %w[C cs_CZ de_DE en es_MX fa_IR fr_FR it_IT ja_JP ru_RU tr_TR zh].to_set
      puts 'Paring locales to a minimal set before build.'.lightblue

      localetypes = `awk -F '/' '{print $2}' localedata/SUPPORTED | sort -u | awk '{print $1}'`.split.flat_map(&:split)
      localetypes_sed = localetypes.join('|')
      Dir['localedata/{*.in,locales/*}'].compact.each do |f|
        g = File.basename(f).gsub(/.UTF-8.*.in/, '').gsub(/.ISO-8859-.*.in/, '')
        h = g.gsub(/_.*/, '')
        locale_test = [g, h].uniq
        # Just check to see if the set difference is smaller than the
        # original set of locales.
        if (@locales - locale_test).length < @locales.length
          puts "Saving locale: #{f}"
        else
          system "sed -i -r '/^[[:space:]]#{g}.*(#{localetypes_sed}).*\\\\/d' localedata/Makefile", exception: false
          system "sed -i -r '/^#{g}.*(#{localetypes_sed}).*\\\\/d' localedata/SUPPORTED", exception: false
        end
      end
      @workdir = `pwd`.chomp
      Dir.chdir('crew-package-glibc/archlinux') do
        system "sed -i 's,/etc/,#{`pwd`.chomp}/,g' *"
        system "sed -i 's,/usr/lib,#{CREW_DEST_LIB_PREFIX},g' *"
        system "sed -i 's,/usr/share,#{CREW_DEST_PREFIX}/share,g' *"
        # Use our locally built localedef during install.
        system "sed -i 's,localedef,#{@workdir}/builddir/locale/localedef --prefix=#{CREW_DEST_DIR},' locale-gen"
      end
      system "sed -e '1,3d' -e 's|/| |g' -e 's|\\\\| |g' -e 's|^|#|g' localedata/SUPPORTED >> crew-package-glibc/archlinux/locale.gen"
    end

    def self.build
      cc_macro_list = %W[
        -DCREW_PREFIX=\\"#{CREW_PREFIX}\\"
        -DCREW_GLIBC_PREFIX=\\"#{CREW_GLIBC_PREFIX}\\"
        -DCREW_GLIBC_INTERPRETER=\\"#{CREW_GLIBC_INTERPRETER}\\"
      ]

      build_env = {
        CFLAGS:   "-O3 -pipe -fPIC -fno-lto #{cc_macro_list.join(' ')}",
        CXXFLAGS: "-O3 -pipe -fPIC -fno-lto #{cc_macro_list.join(' ')}",
        LDFLAGS:  '-fno-lto',
     LD_PRELOAD: ''
      }

      config_opts = %W[
        --prefix=#{CREW_PREFIX}
        --libdir=#{CREW_LIB_PREFIX}
        --mandir=#{CREW_MAN_PREFIX}
        --with-headers=#{CREW_PREFIX}/include
        --with-bugurl=https://github.com/chromebrew/chromebrew/issues/new
        --enable-bind-now
        --enable-fortify-source
        --enable-kernel=3.2
        --enable-shared
        --disable-nscd
        --disable-multilib
        --disable-profile
        --disable-sanity-checks
        --disable-werror
        --without-cvs
        --without-selinux
      ]

      config_opts << '--enable-cet' unless ARCH == 'i686'

      FileUtils.mkdir_p %w[builddir]

      Dir.chdir('builddir') do
        File.write 'configparms', <<~EOF
          slibdir=#{CREW_GLIBC_PREFIX}
          rtlddir=#{CREW_GLIBC_PREFIX}
          sbindir=#{CREW_PREFIX}/bin
          rootsbindir=#{CREW_PREFIX}/bin
        EOF

        system build_env.transform_keys(&:to_s), '../configure', *config_opts, no_preload_hacks: true
        system "make PARALLELMFLAGS='-j #{CREW_NPROC}'", no_preload_hacks: true
      end
    end

    def self.install
      FileUtils.mkdir_p %W[#{CREW_DEST_PREFIX}/etc/env.d #{CREW_DEST_PREFIX}/etc/ld.so.conf.d #{CREW_DEST_PREFIX}/share #{CREW_DEST_LIB_PREFIX} #{CREW_DEST_LIB_PREFIX}/locale]

      system "make DESTDIR=#{CREW_DEST_DIR} install", chdir: 'builddir'

      # Avoid conflicts with the zoneinfo tzdata package:
      %w[tzselect zdump zic].each { |f| FileUtils.rm_rf "#{CREW_DEST_PREFIX}/bin/#{f}" }

      interpreter = case ARCH
                    when 'aarch64', 'armv7l'
                      "#{CREW_DEST_PREFIX}/opt/glibc-libs/ld-linux-armhf.so.3"
                    when 'i686'
                      "#{CREW_DEST_PREFIX}/opt/glibc-libs/ld-linux.so.2"
                    when 'x86_64'
                      "#{CREW_DEST_PREFIX}/opt/glibc-libs/ld-linux-x86-64.so.2"
                    end
      # We need to set make and localedef to work with this newly built
      # glibc.
      FileUtils.cp "#{CREW_PREFIX}/bin/make", 'builddir/make'
      system(<<~INSTALL_LOCALES_EOF, chdir: 'builddir')
        patchelf --set-interpreter #{interpreter} make
        patchelf --replace-needed libdl.so.2 #{CREW_DEST_PREFIX}/opt/glibc-libs/libdl.so.2 make
        patchelf --replace-needed libc.so.6 #{CREW_DEST_PREFIX}/opt/glibc-libs/libc.so.6 make
        patchelf --set-interpreter #{interpreter} locale/localedef
        patchelf --add-needed #{CREW_DEST_PREFIX}/opt/glibc-libs/libdl.so.2 locale/localedef
        patchelf --replace-needed libc.so.6 #{CREW_DEST_PREFIX}/opt/glibc-libs/libc.so.6 locale/localedef
        ./make -j1 DESTDIR=#{CREW_DEST_DIR} localedata/install-locales
        ./make -j1 DESTDIR=#{CREW_DEST_DIR} localedata/install-locale-files
      INSTALL_LOCALES_EOF
      system "sed -e '1,3d' -e 's|/| |g' -e 's| \\\\||g' localedata/SUPPORTED > #{CREW_DEST_PREFIX}/share/i18n/SUPPORTED"
      system 'crew-package-glibc/archlinux/locale-gen'

      File.write "#{CREW_DEST_PREFIX}/etc/ld.so.conf", <<~EOF
        # ld.so.conf autogenerated by Chromebrew
        # DO NOT put your changes here. Instead, put them in
        # #{CREW_PREFIX}/etc/ld.so.conf.d/ instead.

        include #{CREW_PREFIX}/etc/ld.so.conf.d/*.conf
        #{CREW_GLIBC_PREFIX}
        #{CREW_LIB_PREFIX}
        include /etc/ld.so.conf
      EOF
    end

    def self.postinstall
      # update search cache for ld.so
      system "#{CREW_PREFIX}/bin/ldconfig", %i[out err] => File::NULL
      puts "Please run 'crew update' immediately to finish the install.".lightblue
    end
  end
else
  Package.load_package("#{__dir__}/glibc_build223.rb")
  Package.load_package("#{__dir__}/glibc_build227.rb")
  Package.load_package("#{__dir__}/glibc_build232.rb")
  Package.load_package("#{__dir__}/glibc_build233.rb")
  Package.load_package("#{__dir__}/glibc_build235.rb")
  Package.load_package("#{__dir__}/glibc_build237.rb")

  class Glibc < Package
    description 'The GNU C Library project provides the core libraries for GNU/Linux systems.'
    homepage Glibc_build237.homepage
    license Glibc_build237.license

    is_fake

    case LIBC_VERSION
    when '2.23'
      version Glibc_build223.version
      compatibility Glibc_build223.compatibility
      depends_on 'glibc_build223'
    when '2.27'
      version Glibc_build227.version
      compatibility Glibc_build227.compatibility
      depends_on 'glibc_build227'
    when '2.32'
      version Glibc_build232.version
      compatibility Glibc_build232.compatibility
      depends_on 'glibc_build232'
    when '2.33'
      version Glibc_build233.version
      compatibility Glibc_build233.compatibility
      depends_on 'glibc_build233'
    when '2.35'
      version Glibc_build235.version
      compatibility Glibc_build235.compatibility
      depends_on 'glibc_lib235'
    when '2.37'
      version Glibc_build237.version
      compatibility Glibc_build237.compatibility
      depends_on 'glibc_lib237'
    else
      version LIBC_VERSION
      compatibility 'aarch64 armv7l x86_64'
      depends_on 'glibc_fallthrough'
    end
  end
end