#!/bin/sh

CC=gcc
if [ "" = "${CC}" ]
then
    CC=${CC}
fi

output="a.out"
libdirs=""

while getopts "D:o:" flag
do
    case $flag in
        o) output="${OPTARG}";;
        D) libdirs="$libdirs ${OPTARG}";;
    esac
done

for main; do true; done # Get the last argument
if [ ! "" = "${main}" ]; then output="${main%.*}"; fi

#tmpdir="${HOME}/.cache/compile-r7rs/$(md5sum $main)/"
tmpdir="${HOME}/.cache/compile-r7rs/test"

case ${SCC} in
    chibi-scheme)
        paths="-I $tmpdir"
        for dir in $libdirs
        do
            paths="$paths -I $tmpdir/${dir#./}"
        done
        scm_cmd="chibi-scheme $paths"
        ;;
    csi)
        paths="-I $tmpdir/*"
        for dir in $libdirs
        do
            paths="$paths -I $tmpdir/${dir#./}/*"
        done
        scm_cmd="csi -b -R r7rs $paths -script"
        ;;
    csc)
        paths="-I $tmpdir"
        objects=""
        for dir in $libdirs
        do
            paths="$paths -I $tmpdir/${dir#./}"
            for lib in $(find "$dir" -name "*.sld")
            do
                echo "Compiling $lib"
                csc -X r7rs -R r7rs -c -J -unit ${lib%.sld} "$lib"
                objects="$objects ${lib%.sld}.o"
            done
        done
        csc -X r7rs -R r7rs -static $objects -o $output $main
        chmod +x "$output"
        exit 0
        ;;
    icyc)
        paths="-I $tmpdir"
        for dir in $libdirs
        do
            paths="$paths -I $tmpdir/${dir#./}"
        done
        scm_cmd="icyc $paths -s"
        ;;
    gsi)
        paths="${tmpdir%/}/" # / is needed
        for dir in $libdirs
        do
            paths="$paths $tmpdir/${dir#./}/" # / is needed
        done
        scm_cmd="gsi -:s $paths"
        ;;
    gosh)
        paths="-I $tmpdir"
        for dir in $libdirs
        do
            paths="$paths -I $tmpdir/${dir#./}"
        done
        scm_cmd="gosh -r7 $paths"
        ;;
    gxi) # FIXME
        paths=""
        for dir in $libdirs
        do
            paths="$paths :module $tmpdir/${dir#./}"
        done
        scm_cmd="gxi --lang r7rs"
        ;;
    gxc) # FIXME
        echo "(prelude: :scheme/r7rs)" > gerbil.pkg
        paths=""
        libs=""
        for dir in $libdirs
        do
            paths="$paths ${dir#./}"
            for lib in $(find "$dir" -name "*.sld")
            do
                libs="$libs $lib"
            done
        done
        gxc -o $output -static $libs $main
        rm -rf gerbil.pkg
        exit
        ;;
    guile)
        paths="-L $tmpdir"
        for dir in $libdirs
        do
            paths="$paths -L $tmpdir/${dir#./}"
        done
        scm_cmd="guile --r7rs $paths -s"
        ;;
    kawa)
        jar xf kawa.jar
        paths=""
        for dir in $libdirs
        do
            paths="$paths $dir"
            for lib in $(find "$dir" -name "*.sld")
            do
                kawa -C $lib
            done
        done
        {
            echo "Main-Class: main"
            echo "Class-Path: . gnu kawa $paths"
        } > /tmp/compile-r7rs-MANIFEST.mf
        kawa --main -C $main
        classfiles=$(find .- name "*.class")
        jar cvfm "${output}.jar" /tmp/compile-r7rs-MANIFEST.mf kawa gnu $classfiles
        rm -rf gnu kawa
        rm -rf META-INF
        exit
        ;;
    mosh)
        paths="$tmpdir"
        for dir in $libdirs
        do
            paths="$paths:$tmpdir/${dir#./}"
        done
        scm_cmd="mosh --loadpath=$paths"
        ;;
    sash)
        paths="-L $tmpdir"
        for dir in $libdirs
        do
            paths="$paths -L $tmpdir/${dir#./}"
        done
        scm_cmd="sash -r7 $paths"
        ;;
    stklos)
        paths="-I $tmpdir"
        for dir in $libdirs
        do
            paths="$paths -I $tmpdir/${dir#./}"
        done
        scm_cmd="stklos $paths"
        ;;
    skint)
        paths="-I ${tmpdir%/}/"
        for dir in $libdirs
        do
            dir1=${dir#./}
            paths="$paths -I $tmpdir/${dir1%/}/" # / is needed
        done
        scm_cmd="skint $paths"
        ;;
    tr7i)
        paths="$tmpdir"
        for dir in $libdirs
        do
            paths="$paths:$tmpdir/${dir%./}/" # / is needed
        done
        scm_cmd="TR7_LIB_PATH=\"$paths:${TR7_LIB_PATH}\" tr7i"
        ;;
    ypsilon)
        paths="${tmpdir}/"
        for dir in $libdirs
        do
            paths="$paths:$tmpdir/${dir#./}"
        done
        scm_cmd="ypsilon --r7rs $paths --top-level-program"
        ;;
    *)
        echo "Unsupported SCC (SCheme Compiler) implementation or environment value not set."
        exit 1
esac

command="$scm_cmd $tmpdir/$main"
rm -rf "$output"
{
    echo "#!/bin/sh"
    echo "mkdir -p $tmpdir"
    echo 'CURDIR=${PWD}'
    echo "cd $tmpdir"
    echo "{"
    shar -M --quiet-unshar --no-check-existing --no-timestamp $main $libdirs | grep -v "exit 0"
    echo "} > /dev/null"
    echo 'cd ${CURDIR}'
    echo "$command"
} > "$output"

chmod +x "$output"
echo "Command: $command"