#!/usr/bin/env bash

set -o nounset

# shellcheck source=/dev/null
source "${stdenv}/setup"

mkdir -p "${out}/share/keen4"
unzip -j "$dist" -d "${out}/share/keen4"

mkdir -p "${out}/bin"
cat > "${out}/bin/keen4" <<EOF
#! $SHELL -e
if test -z "\$HOME"; then
    echo "HOME directory not set"
    exit 1
fi

# Game wants to write in the current directory, but of course we can't
# let it write in the Nix store.  So create symlinks to the game files
# in ~/.keen4 and execute game from there.
mkdir -p \$HOME/.keen4
cd \$HOME/.keen4

ln -sf "${out}/share/keen4/"* .

"${dosbox}/bin/dosbox" ./KEEN4E.EXE -fullscreen -exit || true

# Cleanup the symlinks.
for i in *; do
    if test -L "\$i"; then
        rm "\$i"
    fi
done
EOF
chmod +x "${out}/bin/keen4"