#! /bin/sh

set -e

usage() {
    cat <<EOF
Usage: $(basename "$0") <work-dir>

<work-dir> is where things will be downloaded and built.
EOF
}

[ "$1" = "-h" ] || [ "$1" = "-help" ] || [ "$1" = "--help" ] && {
    usage
    exit 0
}

[ -z "$1" ] && {
    usage >&2
    exit 2
}

work_dir=$1

# Build eggs with debug info
export CSC_OPTIONS="-d3 -O0"

command -v wget >/dev/null || {
    echo "wget is required.  Install it and try again." >&2
    exit 1
}

mkdir -p "$work_dir"
work_dir=$(readlink -f "$work_dir")
cd "$work_dir"

mkcmd=make
jobs=1
case "$(uname)" in
    Linux)
        jobs=$(nproc)
        ;;
    OpenBSD)
        jobs=$(sysctl -n hw.ncpuonline)
        mkcmd=gmake
        ;;
esac

fetch_chicken() {
    echo "##### Fetching chicken-core"
    if [ -d "$work_dir/chicken-core" ]; then
        git -C "$work_dir/chicken-core" clean -dxf
    else
        git clone https://code.call-cc.org/chicken-core
    fi
}

fetch_svn_client() {
    echo "##### Fetching svnclient"
    if [ -d "$work_dir/svn-client" ]; then
        rm -f "$work_dir/svn-client"/*.{o,so}
    else
        svn --username anonymous --password "" \
            co https://code.call-cc.org/svn/chicken-eggs/release/6/svn-client/trunk svn-client
    fi
}

fetch_qwiki() {
    echo "##### Fetching qwiki"
    if [ -d "$work_dir/qwiki" ]; then
        rm -f "$work_dir/qwiki"/*.{o,so}
    else
        svn --username anonymous --password "" \
            co https://code.call-cc.org/svn/chicken-eggs/release/6/qwiki/trunk qwiki
    fi
}

fetch_wiki() {
    echo "##### Fetching wiki content"
    [ -d "$work_dir/wiki" ] ||
        svn --username anonymous --password "" co https://code.call-cc.org/svn/chicken-eggs/wiki wiki
}

install_chicken() {
    echo "##### Installing CHICKEN"
    if [ ! -e "$work_dir/chicken/bin/csi" ]; then
        cd ./chicken-core

        unset CDPATH
        ./scripts/bootstrap.sh

        ./configure --chicken ./chicken-boot --debugbuild --prefix "$work_dir/chicken"
        $mkcmd -j "$jobs"
        $mkcmd install
        cd ..
    fi
}

install_svn_client() {
    echo "##### Installing svn-client"
    cd ./svn-client
    "$work_dir/chicken/bin/chicken-install"
    cd ..
}

install_qwiki() {
    echo "##### Installing qwiki"
    cd ./qwiki
    "$work_dir/chicken/bin/chicken-install"
    cd ..
}

run_qwiki() {
    echo "##### Running qwiki"
    cat <<EOF > "$work_dir/qwiki-conf.scm"
(import spiffy qwiki qwiki-svn)

(qwiki-repos-uri "https://code.call-cc.org/svn/chicken-eggs/wiki")
(qwiki-source-path "$work_dir/wiki")
(qwiki-web-path "$work_dir/tmp/qwiki-test")

;; Ensure this is an absolute path, if you are using Chicken 4.1 or earlier
(root-path "$work_dir/tmp/qwiki-test")

;; Pass all requests to non-existent files through qwiki:
(vhost-map (quasiquote
             ((".*" . ,(lambda (continue)
                         (parameterize ((handle-not-found qwiki-handler)
                                        (handle-directory qwiki-handler)
                                        (index-files '()))
                           (continue)))))))

(start-server)

EOF

    touch "$work_dir/ready"
    "$work_dir/chicken/bin/csi" -s "$work_dir/qwiki-conf.scm"
}


if [ ! -e "$work_dir/ready" ]; then
    fetch_chicken
    fetch_svn_client
    fetch_qwiki
    fetch_wiki
    install_chicken
    install_svn_client
    install_qwiki
fi

run_qwiki