tbuild.sh

#!/bin/sh
# =============================================================================
# tbuild — the glowieStopper compilation pipeline driver.
# =============================================================================
# Runs the toolchain end-to-end:
#
#     foo.s  --(tasm0)-->  hex  --(seed)-->  foo.img
#
# Usage:
#     ./tbuild.sh <source.s> [output.img]
#     ./tbuild.sh all           # build everything in boot/*.s
#     ./tbuild.sh test          # run the toolchain self-tests
#     ./tbuild.sh demo          # build & note the mbr_hello demo
#
# Zero C, zero Python, zero external assembler. Uses only:
#   - POSIX sh + awk + printf  (host escape hatch)
#   - ./build/tools/seed       (our own hand-crafted 331-byte ELF)
# =============================================================================

set -eu

ROOT="$(cd "$(dirname "$0")" && pwd)"
cd "$ROOT"

TASM0="$ROOT/toolchain/tasm0/tasm0.sh"
SEED="$ROOT/build/tools/seed"
OUTDIR="$ROOT/build"

die() { echo "tbuild: $*" >&2; exit 1; }

need_seed() {
    if [ ! -x "$SEED" ]; then
        die "$SEED not found. Run ./bootstrap/verify.sh first to build it from hex."
    fi
}

assemble() {
    src="$1"
    out="${2:-}"
    [ -f "$src" ] || die "no such file: $src"
    need_seed
    mkdir -p "$OUTDIR"
    if [ -z "$out" ]; then
        out="$OUTDIR/$(basename "${src%.s}").img"
    fi
    "$TASM0" "$src" | "$SEED" > "$out"
    size=$(wc -c < "$out")
    echo "  $src -> $out ($size bytes)"
}

run_tests() {
    echo "[tbuild] tasm0 self-tests"
    "$ROOT/toolchain/tasm0/tests/run.sh"
}

build_all() {
    for s in "$ROOT"/boot/*.s; do
        [ -f "$s" ] || continue
        assemble "$s"
    done
}

case "${1:-}" in
    ""|-h|--help)
        sed -n '2,20p' "$0"
        ;;
    test)
        run_tests
        ;;
    all)
        run_tests
        build_all
        ;;
    demo)
        run_tests
        assemble "$ROOT/boot/mbr_hello.s"
        echo
        echo "Boot the demo with:"
        echo "  qemu-system-x86_64 -drive file=$OUTDIR/mbr_hello.img,format=raw -serial stdio"
        ;;
    *)
        assemble "$1" "${2:-}"
        ;;
esac