build.sh

#!/usr/bin/env bash
# machin-escouade — a top-down tactical POC.
#
#   ./build.sh          build bin/esc
#   ./build.sh test     headless assertions, no window
#
# The engine is machin-ressort's, referenced rather than copied.
set -euo pipefail
cd "$(dirname "$0")"
MACHIN="${MACHIN:-machin}"
RESSORT="${RESSORT:-$HOME/ai/machin-ressort}"

if [ ! -f "$RESSORT/engine/00_core.src" ]; then
    echo "no ressort engine at $RESSORT (set RESSORT=/path)" >&2
    exit 1
fi

# The top-down half of the engine. No rig, no forge, no side-view physics:
# what this game wants from ressort is the grid (flow fields and line of
# sight), the camera, the particles and the C boundary.
ENGINE=("$RESSORT/engine/00_core.src" "$RESSORT/engine/10_scene.src"
        "$RESSORT/engine/20_tilemap.src" "$RESSORT/engine/25_grid.src"
        "$RESSORT/engine/50_ffi.src" "$RESSORT/engine/60_view.src")

ES=(es/10_defs.src es/20_map.src es/25_art.src es/30_sim.src es/40_ai.src
    es/50_draw.src es/60_avatar.src es/70_hud.src es/80_main.src)

have_system_raylib() {
    pkg-config --exists raylib 2>/dev/null && return 0
    [ -f /usr/include/raylib.h ] || [ -f /usr/local/include/raylib.h ]
}
RL_VER=5.0
RL_TAR="raylib-${RL_VER}_linux_amd64"
RL_DIR="vendor/${RL_TAR}"
[ -f "$RESSORT/vendor/${RL_TAR}/lib/libraylib.a" ] && RL_DIR="$RESSORT/vendor/${RL_TAR}"
CACHE="/tmp/rl/${RL_TAR}"

vendor_raylib() {
    if [ -f "${RL_DIR}/lib/libraylib.a" ]; then return; fi
    mkdir -p vendor
    RL_DIR="vendor/${RL_TAR}"
    if [ -f "${CACHE}/lib/libraylib.a" ]; then cp -r "${CACHE}" "${RL_DIR}"
    else curl -fsSL "https://github.com/raysan5/raylib/releases/download/${RL_VER}/${RL_TAR}.tar.gz" | tar xz -C vendor
    fi
}

encode() {
    local out="$1"; shift
    if have_system_raylib; then
        "$MACHIN" encode "$@" > "$out"
    else
        vendor_raylib
        local INC LIB
        INC="$(cd "${RL_DIR}" && pwd)/include"
        LIB="$(cd "${RL_DIR}" && pwd)/lib"
        "$MACHIN" encode "$@" \
            | sed "s#header \"raylib.h\"#cflags \"-I${INC} -L${LIB}\" header \"raylib.h\"#; \
                   s#link \"raylib\"#link \":libraylib.a\"#" > "$out"
    fi
}

mkdir -p bin
if [ "${1:-}" = "test" ]; then
    encode /tmp/esc_test.mfl "${ENGINE[@]}" es/10_defs.src es/20_map.src \
        es/25_art.src es/30_sim.src es/40_ai.src es/50_draw.src es/60_avatar.src \
        es/70_hud.src tests/es_test.src
    "$MACHIN" build /tmp/esc_test.mfl -o bin/esc-test
    ./bin/esc-test
    exit $?
fi

encode /tmp/esc.mfl "${ENGINE[@]}" "${ES[@]}"
"$MACHIN" build /tmp/esc.mfl -o bin/esc
echo "built ./bin/esc"