configure

#!/bin/sh

# default program values unless already defined in environment
: ${CC:=gcc}
: ${SWIG:=swig}
: ${F2PY:=f2py}
: ${PYTHON:=python}
: ${CFLAGS:=-fPIC}

# Available tests-suites
TESTS_SUITES=`echo tests/*/ | sed  -e "s@tests@@g" -e "s@/@@g"`

# File generated by this script
OUTPUT_FILE=env.mk

help_message()
{
cat <<EOF
Usage: ./configure [options]

Generate file $OUTPUT_FILE

Defaults for the options are specified in brackets.

Configuration
  -h, --help               display this help and exit

  --with-gcc=path          Set location of C compiler[$CC]
  --with-python=path       Set location of Python interpretor [$PYTHON]
  --with-swig=path         Set location of interface generator[$SWIG]
  --with-f2py=path         Set location of Fortran to Python
                           inteface generator [$F2PY]

  --boost-include=path     Path to Boost.Python headers
  --boost-library=path     Path to Boost.Python headers

  --without-tests=test     Comma separated list of tests-suite to avoid.
                           [$TESTS_SUITES]

Some influential environment variables:

  CC         C compiler command
  CFLAGS     C compiler flags[$CFLAGS]
  PYTHON     Python interpreter
  SWIG       Interface generator
  F2PY       Fortran to Python interface generator

  BOOST_INCLUDE_PATH    Path to Boost.Python headers
  BOOST_LIBRARY_PATH    Path to Boost libraries

EOF
}

create_env_file ()
{
    cat > "$OUTPUT_FILE" <<EOF
export CC = $CC
export PYTHON = $PYTHON
export SWIG = $SWIG
export F2PY = $F2PY

export CFLAGS = $CFLAGS

export BOOST_INCLUDE_PATH = $BOOST_INCLUDE_PATH
export BOOST_LIBRARY_PATH = $BOOST_LIBRARY_PATH

export DISABLED_TESTS = $DISABLED_TESTS
EOF
}


if ! hash getopt >/dev/null 2>&1; then
    create_env_file
    cat <<EOF
Can not find executable \`getopt', required to parse arguments given to this script.
$OUTPUT_FILE has be created with default values. You might need to edit it manually.
EOF
    exit 1
fi

# Invoke options parser
TEMP=`getopt -o h --long help,with-python:,with-swig:,with-f2py:,with-gcc:,boost-include:,boost-library:,disable-test: -n bootstrap.sh -- "$@"`

if [ $? != 0 ]; then echo "Abort." >&2; exit 1; fi

eval set -- "$TEMP"

while true; do
    case "$1" in
        --boost-include)
            BOOST_INCLUDE_PATH="$2"
            shift 2
            ;;
        --boost-library)
            BOOST_LIBRARY_PATH="$2"
            shift 2
            ;;
        --disable-test)
            for wt in `echo "$2" | tr , ' '`; do
                found=false
                for t in $TESTS_SUITES; do
                    if [ "$t" = "$wt" ] ;then
                        found=true
                        break
                    fi
                done
                if [ $found = false ]; then
                    echo "Error: unknown tests-suite $wt" >/dev/stderr
                    exit 1
                fi
                DISABLED_TESTS="$DISABLED_TESTS,$wt"
            done

            shift 2
            ;;
        -h|--help)
		        help_message
            exit 0
            ;;
        --with-swig)
            SWIG="$2"
            shift 2
            ;;
        --with-python)
            PYTHON="$2"
            shift 2
            ;;
        --with-f2py)
            F2PY="$2"
            shift 2
            ;;
        --with-gcc)
            CC="$2"
            shift 2
            ;;
        --)
            shift
            break
            ;;
        *)
        echo "Error occured while parsing arguments." > /dev/stderr
        exit 1
    esac
done


# cleanup
DISABLED_TESTS=`echo "$DISABLED_TESTS" | sed -e "s/^,\?//"`

create_env_file
cat <<EOF
File $OUTPUT_FILE has been generated. Now you can build and test the project:

\$ make test

EOF