configure

#!/bin/sh

warning()
{
    printf "\033[1m\n" # bold
    printf "$1"
    printf "\033[0m\n\n" # end highlighting
}

fatal_error()
{
    printf "\033[41m\033[93m\n" # yellow on red background
    printf "$1"
    printf "\033[0m\n" # end highlighting
}

findprog ()
{
    sifs=$IFS
    IFS=:
    prog="no"
    for dir in $PATH; do
	if [ -x $dir/$1 -a ! -d $dir/$1 ] ; then
	    prog="$dir/$1"
	    break
	fi
    done
    IFS=$sifs
}

findprog python
python=$prog
if test "$python" = "no"; then
    findprog python3
    python=$prog
fi
echo "checking for Python ... $python"
if test "$python" = "no"; then
    fatal_error "Please install Python before proceeding: http://www.python.org"
    exit 1
fi
python_v=$(python -V 2>&1 | awk '{print $2}')
is_python3=`python -c 'import sys; print("%i" % (sys.hexversion<0x03000000))'`

echo "checking Python version ... $python_v"

# Detect RSFROOT. Priority: (1) --prefix= ; (2) env. variable; (3) sys.prefix
# Also collect the list of all arguments other than --prefix= because this one
# generates an error when passed to "scons"
i=1
prefixparnum=-1
if test -n "$*"; then
   for opt in "$@";
    do
        case "$opt" in
        --prefix=*)
	        root=`echo $opt | sed 's/[-a-zA-Z0-9]*=//'`
                prefixparnum=$i
		break
 	;;
        esac
        i=`expr $i + 1` 
    done
fi

if test ! -n "$root"; then
    root=${RSFROOT}
fi

if test ! -n "$root"; then
    root="no"
fi

echo "checking for RSFROOT ... $root"
if test "$root" = "no"; then
    root=`$python -c "import sys; print(sys.prefix)"`
    warning "I am setting RSFROOT to $root"
fi

findprog scons
scons=$prog
echo "checking for SCons ... $scons"
if test "$scons" = "no"; then
    here=`pwd`
    cd scons
    # if python version >3
    
    if [ $is_python3 -eq 0 ]; then
        archive=`ls [Ss][Cc]ons-4.*.tar.gz`
        gunzip < $archive | tar xf - > /dev/null
        dir=`ls -d [Ss][Cc]ons-4.* | grep '[^mz]$'`
        cd $dir
        export PYTHONUSERBASE="$root"
        $python -m pip install . --user --no-warn-script-location > /dev/null
    else 
    # if python version <3
        archive=`ls [Ss][Cc]ons-3.*.tar.gz`
        gunzip < $archive | tar xf - > /dev/null
        dir=`ls -d [Ss][Cc]ons-3.* | grep '[^mz]$'`
        cd $dir
        $python setup.py install --prefix="$root"  > /dev/null
    fi

    cd "$here"
    scons="$root/bin/scons"
    if test ! -x "$scons"; then
	scons="failed"
    fi
    echo "Installing SCons ... $scons"
    if test "$scons" = "failed"; then
	fatal_error "Automatic SCons installation failed."
	fatal_error "Please install SCons manually!"
	exit 2
    fi
    # Workaround for SCons bug # 1488
    if [ -d "$RSFROOT/lib64" ] && [ ! -d "$RSFROOT/lib" ]; then
        ln -s $RSFROOT/lib64 $RSFROOT/lib
    fi
fi
scons_v=`$scons -v 2>&1 | awk 'NR==2 {print $2}' | sed s/,//`
echo "checking SCons version ... $scons_v"

echo "Running RSFROOT=$root $scons $args config ..."
rm -rf env.*sh .scon* config.py

first=1
arglist=""
for i in "$@"
do
    if test $first -ne $prefixparnum; then
        arglist=""$arglist" \"\$"$first"\""
    fi
    first=`expr $first + 1` 
done

echo "------------------------"
command1=`printf "$arglist config"`
command2="RSFROOT=$root $scons `printf "$command1"`"
eval $command2
echo "------------------------"
echo "Done with configuration."


chmod +x framework/setenv.py
M8R_PY_PATH=`RSFROOT=$root framework/setenv.py`
# echo $M8R_PY_PATH
if [ -n "$PYTHONPATH" ]; then
PYTHONPATH=$M8R_PY_PATH:${PYTHONPATH}
else
PYTHONPATH=$M8R_PY_PATH
fi


echo "SCONS = RSFROOT=$root PYTHONPATH=$PYTHONPATH $scons" > Makefile
cat Makefile.in >> Makefile
exit 0