#!/bin/bash
#
# Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
#
# This code is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 only, as
# published by the Free Software Foundation.
#
# This code is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
# version 2 for more details (a copy is included in the LICENSE file that
# accompanied this code).
#
# You should have received a copy of the GNU General Public License version
# 2 along with this work; if not, write to the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
# or visit www.oracle.com if you need additional information or have any
# questions.
#

if test "x$BASH_VERSION" = x; then
  echo This script needs bash to run.
  echo It is recommended to use the configure script in the source tree root instead.
  exit 1
fi

# Force autoconf to use bash. This also means we must disable autoconf re-exec.
export CONFIG_SHELL=$BASH
export _as_can_reexec=no

CONFIGURE_COMMAND_LINE="$@"
conf_script_dir=`dirname $0`

if [ "$CUSTOM_CONFIG_DIR" = "" ]; then
  conf_custom_script_dir="$conf_script_dir/../../jdk/make/closed/autoconf"
else
  conf_custom_script_dir=$CUSTOM_CONFIG_DIR
fi

###
### Test that the generated configure is up-to-date
###

run_autogen_or_fail() {
  if test "x`which autoconf 2> /dev/null`" = x; then
    echo "Cannot locate autoconf, unable to correct situation."
    echo "Please install autoconf and run 'bash autogen.sh' to update the generated files."
    echo "Error: Cannot continue" 1>&2
    exit 1
  else
    echo "Running autogen.sh to correct the situation"
    bash $conf_script_dir/autogen.sh
  fi
}

check_autoconf_timestamps() {
  for file in $conf_script_dir/configure.ac $conf_script_dir/*.m4 ; do
    if test $file -nt $conf_script_dir/generated-configure.sh; then
      echo "Warning: The configure source files is newer than the generated files."
      run_autogen_or_fail
    fi
  done

  if test -e $conf_custom_script_dir/generated-configure.sh; then
    # If custom source configure is available, make sure it is up-to-date as well.
    for file in $conf_script_dir/configure.ac $conf_script_dir/*.m4 $conf_custom_script_dir/*.m4; do
      if test $file -nt $conf_custom_script_dir/generated-configure.sh; then
        echo "Warning: The configure source files is newer than the custom generated files."
        run_autogen_or_fail
      fi
    done
  fi
}

check_hg_updates() {
  if test "x`which hg 2> /dev/null`" != x; then
    conf_updated_autoconf_files=`cd $conf_script_dir && hg status -mard 2> /dev/null | grep autoconf`
    if test "x$conf_updated_autoconf_files" != x; then
      echo "Configure source code has been updated, checking time stamps"
      check_autoconf_timestamps
    fi

    if test -e $conf_custom_script_dir; then
      # If custom source configure is available, make sure it is up-to-date as well.
      conf_custom_updated_autoconf_files=`cd $conf_custom_script_dir && hg status -mard 2> /dev/null | grep autoconf`
      if test "x$conf_custom_updated_autoconf_files" != x; then
        echo "Configure custom source code has been updated, checking time stamps"
        check_autoconf_timestamps
      fi
    fi
  fi
}

# Check for local changes
check_hg_updates

if test -e $conf_custom_script_dir/generated-configure.sh; then
  # Test if open configure is newer than custom configure, if so, custom needs to
  # be regenerated. This test is required to ensure consistency with custom source.
  conf_open_configure_timestamp=`grep DATE_WHEN_GENERATED= $conf_script_dir/generated-configure.sh  | cut -d"=" -f 2`
  conf_custom_configure_timestamp=`grep DATE_WHEN_GENERATED= $conf_custom_script_dir/generated-configure.sh  | cut -d"=" -f 2`
  if test $conf_open_configure_timestamp -gt $conf_custom_configure_timestamp; then
    echo "Warning: The generated configure file contains changes not present in the custom generated file."
    run_autogen_or_fail
  fi
fi

# Autoconf calls the configure script recursively sometimes.
# Don't start logging twice in that case
if test "x$conf_debug_configure" = xtrue; then
  conf_debug_configure=recursive
fi
###
### Process command-line arguments
###
conf_processed_arguments=()
conf_openjdk_target=

for conf_option
do
  case $conf_option in
    --openjdk-target=*)
      conf_openjdk_target=`expr "X$conf_option" : '[^=]*=\(.*\)'`
      continue ;;
    --debug-configure)
      if test "x$conf_debug_configure" != xrecursive; then
        conf_debug_configure=true
        export conf_debug_configure
      fi
      continue ;;
    *)
      conf_processed_arguments=("${conf_processed_arguments[@]}" "$conf_option") ;;
  esac

  case $conf_option in
    -build | --build | --buil | --bui | --bu |-build=* | --build=* | --buil=* | --bui=* | --bu=*)
      conf_legacy_crosscompile="$conf_legacy_crosscompile $conf_option" ;;
    -target | --target | --targe | --targ | --tar | --ta | --t | -target=* | --target=* | --targe=* | --targ=* | --tar=* | --ta=* | --t=*)
      conf_legacy_crosscompile="$conf_legacy_crosscompile $conf_option" ;;
    -host | --host | --hos | --ho | -host=* | --host=* | --hos=* | --ho=*)
      conf_legacy_crosscompile="$conf_legacy_crosscompile $conf_option" ;;
    -help | --help | --hel | --he | -h)
      conf_print_help=true ;;
  esac
done

if test "x$conf_legacy_crosscompile" != "x"; then
  if test "x$conf_openjdk_target" != "x"; then
    echo "Error: Specifying --openjdk-target together with autoconf"
    echo "legacy cross-compilation flags is not supported."
    echo "You specified: --openjdk-target=$conf_openjdk_target and $conf_legacy_crosscompile."
    echo "The recommended use is just --openjdk-target."
    exit 1
  else
    echo "Warning: You are using legacy autoconf cross-compilation flags."
    echo "It is recommended that you use --openjdk-target instead."
    echo ""
  fi
fi

if test "x$conf_openjdk_target" != "x"; then
  conf_build_platform=`sh $conf_script_dir/build-aux/config.guess`
  conf_processed_arguments=("--build=$conf_build_platform" "--host=$conf_openjdk_target" "--target=$conf_openjdk_target" "${conf_processed_arguments[@]}")
fi

# Make configure exit with error on invalid options as default.
# Can be overridden by --disable-option-checking, since we prepend our argument
# and later options override earlier.
conf_processed_arguments=("--enable-option-checking=fatal" "${conf_processed_arguments[@]}")

###
### Call the configure script
###
if test -e $conf_custom_script_dir/generated-configure.sh; then
  # Custom source configure available; run that instead
  echo Running custom generated-configure.sh
  conf_script_to_run=$conf_custom_script_dir/generated-configure.sh
else
  echo Running generated-configure.sh
  conf_script_to_run=$conf_script_dir/generated-configure.sh
fi

if test "x$conf_debug_configure" != x; then
  # Turn on shell debug output if requested (initial or recursive)
  set -x
fi

if test "x$conf_debug_configure" = xtrue; then
  # Turn on logging, but don't turn on twice when called recursive
  conf_debug_logfile=./debug-configure.log
  (exec 3>&1 ; (. $conf_script_to_run "${conf_processed_arguments[@]}" 2>&1 1>&3 ) | tee -a $conf_debug_logfile 1>&2 ; exec 3>&-) | tee -a $conf_debug_logfile
else
  ( . $conf_script_to_run "${conf_processed_arguments[@]}" )
fi

conf_result_code=$?
###
### Post-processing
###

if test $conf_result_code -eq 0; then
  if test "x$conf_print_help" = xtrue; then
    cat <<EOT

Additional (non-autoconf) OpenJDK Options:
  --openjdk-target=TARGET cross-compile with TARGET as target platform
                          (i.e. the one you will run the resulting binary on).
                          Equivalent to --host=TARGET --target=TARGET
                          --build=<current platform>
  --debug-configure       Run the configure script with additional debug
                          logging enabled.

Please be aware that, when cross-compiling, the OpenJDK configure script will
generally use 'target' where autoconf traditionally uses 'host'.
EOT
  fi
else
  echo configure exiting with result code $conf_result_code
fi

exit $conf_result_code