#!/bin/sh
#
# %CopyrightBegin%
#
# Copyright Ericsson AB 2018-2021. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# %CopyrightEnd%
#
# * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
# WARNING!
#    DO NOT EDIT the 'configure' file which is automatically generated from
#    'configure.src'! In order to update 'configure' edit 'configure.src' and
#    execute './otp_build update_configure [--no-commit]'.
# * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
#
# This is a handcrafted wrapper script which runs the actual (autoconf)
# 'configure' scripts in different parts of OTP.
#
# The true (autoconf) configure scripts are run in parallel unless
# --disable-parallel-configure is passed as argument to this script.
#
# The config cache feature is disabled since it mostly causes problems
# and especially when executing multiple configure scripts in parallel.
# On windows a static cache for each configure is used since it
# otherwise takes forever to run configure...
#

unset CDPATH

default_cflags="-g -O2"

pie_cflags=
pie_ldflags=
mXY_build=
static_cache=

bootstrap_only=no
parallel_otp_configure=yes
help=no
user_srcdir=
config_arguments=
skip_applications=
while test $# != 0; do
    case $1 in
	-srcdir=* | --srcdir=*)
	    user_srcdir=`expr -- "$1" : '[^=]*=\(.*\)'`
	    if test "$ERL_TOP" != ""; then
		echo "WARNING: Overriding ERL_TOP with $user_srcdir" 1>&2
		echo "" 1>&2
	    fi
	    ERL_TOP="$user_srcdir"
	    ;;
	-srcdir | --srcdir)
	    shift
	    test $# != 0 || {
		echo "ERROR: Missing source dir" 1>&2
		exit 1
	    }
	    user_srcdir="$1"
	    if test "$ERL_TOP" != ""; then
		echo "WARNING: Overriding ERL_TOP with $user_srcdir" 1>&2
		echo "" 1>&2
	    fi
	    ERL_TOP="$user_srcdir"
	    ;;
	--enable-bootstrap-only)
            config_arguments="$config_arguments --enable-bootstrap-only"
	    bootstrap_only=yes;;
	--disable-bootstrap-only)
            config_arguments="$config_arguments --disable-bootstrap-only"
	    bootstrap_only=no;;
	--enable-option-checking)
	    echo "ERROR: Cannot enable option checking" 1>&2
	    exit 1;;
	--disable-option-checking)
	    # Got it...
	    ;;
	--disable-parallel-configure)
	    parallel_otp_configure=no
	    ;;
	--config-cache | -C)
	    echo "WARNING: Ignoring config cache file since it will mess up the configuration" 1>&2
	    echo "" 1>&2
	    ;;
	-cache-file=* | --cache-file=* )
	    static_cache=`expr -- "$1" : '[^=]*=\(.*\)'`
	    if test "$static_cache" != "/dev/null"; then
		echo "WARNING: Only using config cache file '$static_cache' as static cache" 1>&2
		echo "" 1>&2
	    else
		static_cache=
	    fi
	    ;;
        -cache-file | --cache-file)
	    shift
	    test $# != 0 || {
		echo "ERROR: Missing cache file" 1>&2
		exit 1
	    }
	    static_cache=$1
	    if test "$static_cache" != "/dev/null"; then
		echo "WARNING: Only using config cache file '$static_cache' as static cache" 1>&2
		echo "" 1>&2
	    else
		static_cache=
	    fi
	    ;;
	--enable-m64-build)
	    mXY_build="-m64"
	    ;;
	--enable-m32-build)
	    mXY_build="-m32"
	    ;;
	--disable-m64-build)
	    if test "$mXY_build" = "-m64"; then
		mXY_build=
	    fi;;
	--disable-m32-build)
	    if test "$mXY_build" = "-m32"; then
		mXY_build=
	    fi;;
	--enable-pie)
	    pie_cflags="-fPIE"
	    pie_ldflags="-pie"
	    ;;
	--disable-pie)
	    pie_cflags="-fno-PIE"
	    pie_ldflags="-no-pie"
	    ;;
	CFLAGS=* | LDFLAGS=*)
	    flgs_var=`expr -- "$1" : '\([^=]*\)=.*'`
	    flgs_val=`expr -- "$1" : '[^=]*=\(.*\)'`
	    eval $flgs_var=\$flgs_val
	    ;;
	--help=r* | -help=r*)
	    help=all;;
        --help* | -help* | -h)
	    help=$1;;
        *)
	    case $1 in
		--without-*)
		    skip_app=`expr -- "$1" : '--without-\(.*\)'`
		    if test -d "lib/$skip_app"; then
			skip_applications="$skip_applications $skip_app"
		    fi;;
		*)
		    ;;
	    esac
            case $1 in
		*\'*)
                    1=`echo "$1" | sed "s/'/'\\\\\\\\''/g"` ;;
		*)
                ;;
            esac
            config_arguments="$config_arguments '$1'";;
    esac
    shift
done

if test $parallel_otp_configure = yes; then
    case `uname -s` in
	MSYS* | msys* | CYGWIN* | cygwin )
            ;;
	*)
	    trap 'kill -KILL -$$' 1 2 3 6 15
	    ;;
    esac
fi

#
# Figure ERL_TOP out...
#

root_dir=
dir_chk_data=`date`

if root_dir=`dirname "$0" 2>/dev/null` \
	&& test "$root_dir" != "" \
	&& cd "$root_dir" 2>/dev/null; then
    root_dir=`pwd 2>/dev/null`
    if test $? -ne 0; then
	root_dir=
    else
	case "$root_dir" in
	    /*)
		echo "$dir_chk_data" > "$root_dir"/config.dir.check.$$ 2>/dev/null
		;;
	    *)
		root_dir=
	esac
    fi
else
    root_dir=
fi

if test "$root_dir" = ""; then
    case X"$ERL_TOP" in
	X)
	    echo "ERROR: Cannot figure out the root directory of" 1>&2
	    echo "       the OTP source. Please set the ERL_TOP" 1>&2
	    echo "       environment variable." 1>&2
	    exit 1
	    ;;
	X/*)
	    cd "$ERL_TOP" 2>/dev/null || {
		echo "ERROR: Cannot change directory to ERL_TOP " 1>&2
		echo "       '$ERL_TOP'" 1>&2
		exit 1
	    }
	    ;;
	X*)
	    echo "ERROR: ERL_TOP '$ERL_TOP' is not an absolute path" 1>&2
	    exit 1
	    ;;
    esac
else
    case X"$ERL_TOP" in
	X)
	    ERL_TOP="$root_dir"
	    rm -f "$root_dir"/config.dir.check.$$
	    ;;
	X/*)
	    cd "$ERL_TOP" 2>/dev/null || {
		rm -f "$root_dir"/config.dir.check.$$
		echo "ERROR: Cannot change directory into ERL_TOP " 1>&2
		echo "       '$ERL_TOP'" 1>&2
		exit 1
	    }
	    dir_chk=`cat ./config.dir.check.$$ 2>/dev/null` || dir_chk=error
	    rm -f "$root_dir"/config.dir.check.$$
	    test "$dir_chk" = "$dir_chk_data" || {
		echo "ERROR: ERL_TOP '$ERL_TOP' is not the same" 1>&2
		echo "       as 'configure' location '$root_dir'" 1>&2
		exit 1
	    }
	    ;;
	X*)
	    rm -f "$root_dir"/config.dir.check.$$
	    echo "ERROR: ERL_TOP '$ERL_TOP' is not an absolute path" 1>&2
	    exit 1
	    ;;
    esac
fi

export ERL_TOP

rm -f "$ERL_TOP/lib/SKIP-APPLICATIONS"

case "$help" in
    no)
        ;;
    all)
	(cd "$ERL_TOP/make" && ./configure --help)
	app_dirs=
	for app_dir in erts lib/*; do
	    if test -f "$app_dir/configure"; then
		echo ""
		echo "=== $app_dir ==="
		(cd "$ERL_TOP/$app_dir" && ./configure --help=short)
	    fi
	done
	exit 0;;
    *)
	(cd "$ERL_TOP/make" && ./configure "$help")
	exit 0;;
esac

if test "$mXY_build" = "" && test "$pie_cflags" = ""; then
    if test "$CFLAGS" != ""; then
	config_arguments="$config_arguments CFLAGS='$CFLAGS'"
	unset CFLAGS
    fi

    if test "$LDFLAGS" != ""; then
	config_arguments="$config_arguments LDFLAGS='$LDFLAGS'"
	unset LDFLAGS
    fi
else
    if test "$CFLAGS" = ""; then
	CFLAGS=$default_cflags
    fi
    config_arguments="$config_arguments CFLAGS='$mXY_build $pie_cflags $CFLAGS'"
    unset CFLAGS
    config_arguments="$config_arguments LDFLAGS='$mXY_build $pie_ldflags $LDFLAGS'"
    unset LDFLAGS
    case $mXY_build in
	-m32)
            config_arguments="$config_arguments --enable-m32-build"
	    ;;
	-m64)
            config_arguments="$config_arguments --enable-m64-build"
	    ;;
    esac
fi

config_arguments="$config_arguments --disable-option-checking"

if test $bootstrap_only = no; then
    check_conf_dirs=`echo lib/*`
else
    check_conf_dirs="@BOOTSTRAP_LIB_APP_DIRS@"
fi

# 'erts' *needs* to be last in app_dirs! Any apps
# after it wont be able to run in parallel with
# erts...

app_dirs=
for app_dir in make $check_conf_dirs erts; do
    if test -f "$app_dir/configure"; then
       if test "$static_cache" != ""; then
          cp -f "$static_cache" "$ERL_TOP/$app_dir/local.static.config.cache"
       fi
       rm -f $app_dir/configure.result.failed
       rm -f $app_dir/configure.result.command
       rm -f $app_dir/configure.result.stdout
       rm -f $app_dir/configure.result.stderr
       app_dirs="$app_dirs $app_dir"
    fi
done

if test "$static_cache" = ""; then
   local_cache_file=/dev/null
else
   local_cache_file=./local.static.config.cache
fi

for app_dir in $app_dirs; do
    cd "$ERL_TOP/$app_dir"
    cmd_str="./configure $config_arguments --cache-file=$local_cache_file --srcdir=\"$ERL_TOP/$app_dir\""
    if test $parallel_otp_configure = no; then
	echo "=== Running configure in $ERL_TOP/$app_dir ==="
	eval $cmd_str
	echo ""
    elif test $app_dir != erts; then
	echo $cmd_str >./configure.result.command
	eval $cmd_str 1>./configure.result.stdout 2>./configure.result.stderr || echo "fatal" > "./configure.result.failed" &
    else
	# ERTS configure gets to use stdout/stderr; the others are printed when done...
	echo "=== Running configure in $ERL_TOP/erts ==="
	echo $cmd_str
	eval $cmd_str || {
	    rm -f erts/configure.result.* lib/*/configure.result.*
	    echo "ERROR: $ERL_TOP/$app_dir/configure failed!" 1>&2
	    kill -KILL -$$
	    exit 1
	}
    fi
done

cd "$ERL_TOP"

if test $parallel_otp_configure = yes; then
    # Wait for all sub-configures to finish...
    wait

    for app_dir in $app_dirs; do
	if test -f "$app_dir/configure.result.command"; then
	    echo ""
	    echo "=== Running configure in $ERL_TOP/$app_dir ==="
	    cat "$app_dir/configure.result.command"
	    rm -f "$app_dir/configure.result.command"
	fi
	if test -f "$app_dir/configure.result.stdout"; then
	    cat "$app_dir/configure.result.stdout"
	    rm -f "$app_dir/configure.result.stdout"
	fi
	if test -f "$app_dir/configure.result.stderr"; then
	    cat "$app_dir/configure.result.stderr" 1>&2
	    rm -f "$app_dir/configure.result.stderr"
	fi
	if test -f "$app_dir/configure.result.failed"; then
	    rm -f erts/configure.result.* lib/*/configure.result.*
	    echo "ERROR: $ERL_TOP/$app_dir/configure failed!" 1>&2
	    exit 1
	fi
    done
fi


echo ""

pattern="lib/*/SKIP"
files=`echo $pattern`
if test "$files" != "$pattern" || test "$skip_applications" != ""; then
  echo '*********************************************************************'
  echo '**********************  APPLICATIONS DISABLED  **********************'
  echo '*********************************************************************'
  echo
  if test "$files" != "$pattern"; then
    for skipfile in $files; do
      app=`dirname $skipfile`; app=`basename $app`
      printf "%-15s: " $app; cat $skipfile
    done
  fi
  for skipapp in $skip_applications; do
    printf "%-15s: User gave --without-%s option\n" $skipapp $skipapp
    echo "$skipapp" >> "$ERL_TOP/lib/SKIP-APPLICATIONS"
  done
  echo
  echo '*********************************************************************'
fi
pattern="lib/*/CONF_INFO"
files=`echo $pattern`
if test "$files" != "$pattern" || test -f erts/CONF_INFO; then
  echo '*********************************************************************'
  echo '**********************  APPLICATIONS INFORMATION  *******************'
  echo '*********************************************************************'
  echo
  test "$files" != "$pattern" || files=""
  test ! -f erts/CONF_INFO || files="$files erts/CONF_INFO"
  for infofile in $files; do
    app=`dirname $infofile`; app=`basename $app`
    printf "%-15s: " $app; cat $infofile
  done
  echo
  echo '*********************************************************************'
fi
if test -f "erts/doc/CONF_INFO"; then
  echo '*********************************************************************'
  echo '**********************  DOCUMENTATION INFORMATION  ******************'
  echo '*********************************************************************'
  echo
  printf "%-15s: \n" documentation;
  havexsltproc="yes"
  for cmd in `cat erts/doc/CONF_INFO`; do
	echo "                 $cmd is missing."
  if test $cmd = "xsltproc"; then
    havexsltproc="no"
  fi
  done
  if test $havexsltproc = "no"; then
    echo '                 The documentation cannot be built.'
  else
    echo '                 Using fakefop to generate placeholder PDF files.'
  fi
  echo
  echo '*********************************************************************'
fi
