#!/usr/bin/ruby

# Android build system is complicated and does not allow to build
# separate parts easily.
# This script tries to mimic Android build rules.

def expand(dir, files)
  files.map{|f| File.join(dir,f)}
end

# Compiles sources to *.o files.
# Returns array of output *.o filenames
def compile(sources, cflags)
  outputs = []
  for s in sources
    ext = File.extname(s)

    case ext
    when '.c'
      cc = 'cc'
      lang_flags = '-std=gnu11 $CFLAGS $CPPFLAGS'
    when '.cpp', '.cc'
      cc = 'cxx'
      lang_flags = '-std=gnu++17 $CXXFLAGS $CPPFLAGS'
    else
        raise "Unknown extension #{ext}"
    end

    output = s + '.o'
    outputs << output
    puts "build #{output}: #{cc} #{s}\n    cflags = #{lang_flags} #{cflags}"
  end

  return outputs
end

# dir - directory where ninja file is located
# lib - static library path relative to dir
def subninja(dir, lib)
  puts "subninja #{dir}build.ninja"
  return lib.each{|l| dir + l}
end

# Links object files
def link(output, objects, ldflags)
  puts "build #{output}: link #{objects.join(' ')}\n    ldflags = #{ldflags} $LDFLAGS"
end

puts "# This set of commands generated by generate_build.rb script\n\n"
puts "CC = #{ENV['CC'] || 'clang'}"
puts "CXX = #{ENV['CXX'] || 'clang++'}\n\n"
puts "CFLAGS = #{ENV['CFLAGS']}"
puts "CXXFLAGS = #{ENV['CXXFLAGS']}"
puts "LDFLAGS = #{ENV['LDFLAGS']}"
puts "PKGVER = #{ENV['PKGVER']}\n\n"


puts """
rule cc
  command = $CC $cflags -c $in -o $out

rule cxx
  command = $CXX $cflags -c $in -o $out

rule link
  command = $CXX $ldflags $LDFLAGS $in -o $out


"""

adbdfiles = %w(
  adb.cpp
  adb_io.cpp
  adb_listeners.cpp
  adb_trace.cpp
  adb_utils.cpp
  adb_unique_fd.cpp
  sockets.cpp
  transport.cpp
  transport_local.cpp
  transport_usb.cpp
  fdevent.cpp
  shell_service_protocol.cpp
)
libadbd = compile(expand('core/adb', adbdfiles), '-DADB_HOST=1 -Icore/diagnose_usb/include -Icore/include -Icore/base/include -Icore/adb -Icore/libcrypto_utils/include')

adbfiles = %w(
  client/auth.cpp
  client/console.cpp
  socket_spec.cpp
  client/bugreport.cpp
  client/line_printer.cpp
  client/commandline.cpp
  client/adb_client.cpp
  services.cpp
  client/file_sync_client.cpp
  sysdeps_unix.cpp
  sysdeps/errno.cpp
  sysdeps/posix/network.cpp
  client/main.cpp
  client/usb_dispatch.cpp
  client/usb_linux.cpp
  client/usb_libusb.cpp
  client/transport_mdns.cpp
)
libadb = compile(expand('core/adb', adbfiles), '-D_GNU_SOURCE -DADB_HOST=1 -Icore/libcrypto_utils/include -Iboringssl/src/include -Icore/include -Icore/base/include -Icore/adb -Imdnsresponder/mDNSShared')

basefiles = %w(
  file.cpp
  threads.cpp
  logging.cpp
  parsenetaddress.cpp
  stringprintf.cpp
  strings.cpp
  errors_unix.cpp
  test_utils.cpp
)
libbase = compile(expand('core/base', basefiles), '-DADB_HOST=1 -Icore/base/include -Icore/include')

logfiles = %w(
  log_event_write.c
  fake_log_device.c
  log_event_list.c
  logger_write.c
  config_write.c
  config_read.c
  logger_lock.c
  local_logger.c
  fake_writer.c
  logger_name.c
  stderr_write.c
  logprint.c
)
liblog = compile(expand('core/liblog', logfiles), '-DLIBLOG_LOG_TAG=1006 -D_XOPEN_SOURCE=700 -DFAKE_LOG_DEVICE=1 -Icore/libsystem/include -Icore/liblog/include -Icore/include')

cutilsfiles = %w(
  fs_config.cpp
  canned_fs_config.cpp
  android_get_control_file.cpp
  socket_network_client_unix.cpp
  socket_inaddr_any_server_unix.cpp
  sockets.cpp
  sockets_unix.cpp
  socket_local_client_unix.cpp
  socket_local_server_unix.cpp
)
libcutils = compile(expand('core/libcutils', cutilsfiles), '-D_GNU_SOURCE -Icore/libcutils/include -Icore/include -Icore/base/include')

diagnoseusbfiles = %w(
  diagnose_usb.cpp
)
libdiagnoseusb = compile(expand('core/diagnose_usb', diagnoseusbfiles), '-Icore/diagnose_usb/include -Icore/include -Icore/base/include')

libcryptofiles = %w(
  android_pubkey.c
)
libcrypto = compile(expand('core/libcrypto_utils', libcryptofiles), '-Icore/libcrypto_utils/include -Iboringssl/src/include')

utilfiles = %w(
  FileMap.cpp
  Unicode.cpp
  SharedBuffer.cpp
  String8.cpp
  String16.cpp
)
libutil = compile(expand('core/libutils', utilfiles), '-Icore/include')

mdnsfiles = %w(
  mDNSShared/dnssd_ipc.c
  mDNSShared/dnssd_clientstub.c
)
mdns = compile(expand('mdnsresponder', mdnsfiles), '-D_GNU_SOURCE -DHAVE_IPV6 -DHAVE_LINUX -DNOT_HAVE_SA_LEN -DUSES_NETLINK -UMDNS_DEBUGMSGS -DMDNS_DEBUGMSGS=0 -Imdnsresponder/mDNSShared -Imdnsresponder/mDNSCore -Iinclude')

zipfiles = %w(
  zip_archive_stream_entry.cc
  zip_archive.cc
)
libzip = compile(expand('core/libziparchive', zipfiles), '-Icore/libziparchive/include -Icore/base/include -Icore/include')

boringcryptofiles = %w(
  bn/cmp.c
  bn/bn.c
  bytestring/cbb.c
  mem.c
  buf/buf.c
  bio/file.c
  bn/convert.c
  base64/base64.c
)

boringcrypto = compile(expand('boringssl/src/crypto', boringcryptofiles), '-Iboringssl/src/include -Iinclude')

link('adb', libbase + liblog + libcutils + libcrypto + libadbd + libadb + libdiagnoseusb + libutil + libzip + mdns + boringcrypto, '-lz -lcrypto -lpthread -lusb-1.0')


fastbootfiles = %w(
  bootimg_utils.cpp
  fs.cpp
  socket.cpp
  tcp.cpp
  udp.cpp
  usb_linux.cpp
  util.cpp
  main.cpp
  engine.cpp
  fastboot.cpp
  fastboot_driver.cpp
)
libfastboot = compile(expand('core/fastboot', fastbootfiles), '-DFASTBOOT_VERSION="\"$PKGVER\"" -D_GNU_SOURCE -D_XOPEN_SOURCE=700 -DUSE_F2FS -Icore/base/include -Icore/include -Icore/adb -Icore/libsparse/include -Icore/mkbootimg/include/bootimg -Icore/libziparchive/include -Icore/diagnose_usb/include')

sparsefiles = %w(
  backed_block.cpp
  output_file.cpp
  sparse.cpp
  sparse_crc32.cpp
  sparse_err.cpp
  sparse_read.cpp
)
libsparse = compile(expand('core/libsparse', sparsefiles), '-Icore/libsparse/include -Icore/base/include')

link('fastboot', libsparse + libzip + libcutils + liblog + libutil + libbase + libfastboot + libdiagnoseusb, '-lz -lpcre2-8 -lpthread -ldl')

simg2imgfiles = %w(
  simg2img.cpp
)
libsimg2img = compile(expand('core/libsparse', simg2imgfiles), '-Iinclude -Icore/libsparse/include')
link('simg2img', libbase + libsparse + libsimg2img, '-lz')

img2simgfiles = %w(
  img2simg.cpp
)
libimg2simg = compile(expand('core/libsparse', img2simgfiles), '-Iinclude -Icore/libsparse/include')
link('img2simg', libbase + libsparse + libimg2simg, '-lz')