ipxe/build.sh

#!/usr/bin/env bash
# =============================================================================
# iPXE build script
#
# Usage:
#   ./build.sh [OPTIONS]
#
# Options:
#   -p, --platform <name>   Platform to build (default: efi-x64)
#   -e, --embed    <file>   iPXE script to embed (default: none)
#   -o, --output   <dir>    Output directory (default: ./build)
#   -j, --jobs     <n>      Parallel jobs (default: nproc)
#   -h, --help              Show this help
#
# Platforms:
#   efi-x64     x86-64 UEFI EFI application  [bin-x86_64-efi/ipxe.efi]
#   efi-ia32    32-bit UEFI EFI application   [bin-i386-efi/ipxe.efi]
#   efi-arm64   AArch64 UEFI EFI application  [bin-arm64-efi/ipxe.efi]
#   snp-x64     x86-64 SNP-only EFI binary    [bin-x86_64-efi/snponly.efi]
#   bios        x86 legacy BIOS PXE           [bin/undionly.kpxe]
#
# Examples:
#   ./build.sh
#   ./build.sh -p efi-x64 -e boot.ipxe
#   ./build.sh -p bios -o ./out
#   ./build.sh -p efi-x64 -e boot.ipxe -j 8
# =============================================================================
set -euo pipefail

# ── Defaults ─────────────────────────────────────────────────────────────────
PLATFORM="efi-x64"
EMBED=""
OUTPUT_DIR="$(dirname "$0")/build"
JOBS="$(nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || echo 4)"
SRC_DIR="$(dirname "$0")/src"

# ── Colour helpers ────────────────────────────────────────────────────────────
if [ -t 1 ]; then
    C_BOLD='\033[1m'; C_GREEN='\033[0;32m'; C_CYAN='\033[0;36m'
    C_YELLOW='\033[0;33m'; C_RED='\033[0;31m'; C_RESET='\033[0m'
else
    C_BOLD=''; C_GREEN=''; C_CYAN=''; C_YELLOW=''; C_RED=''; C_RESET=''
fi

info()  { echo -e "${C_CYAN}▶${C_RESET} $*"; }
ok()    { echo -e "${C_GREEN}✔${C_RESET} $*"; }
warn()  { echo -e "${C_YELLOW}⚠${C_RESET} $*"; }
die()   { echo -e "${C_RED}✘${C_RESET} $*" >&2; exit 1; }

# ── Argument parsing ──────────────────────────────────────────────────────────
usage() {
    sed -n '3,20p' "$0" | sed 's/^# \{0,1\}//'
    exit 0
}

while [[ $# -gt 0 ]]; do
    case $1 in
        -p|--platform) PLATFORM="$2"; shift 2 ;;
        -e|--embed)    EMBED="$2";    shift 2 ;;
        -o|--output)   OUTPUT_DIR="$2"; shift 2 ;;
        -j|--jobs)     JOBS="$2";     shift 2 ;;
        -h|--help)     usage ;;
        *) die "Unknown option: $1" ;;
    esac
done

# ── Platform → make target ────────────────────────────────────────────────────
case "$PLATFORM" in
    efi-x64)   MAKE_TARGET="bin-x86_64-efi/ipxe.efi";    OUTPUT_NAME="ipxe-x64.efi"   ;;
    efi-ia32)  MAKE_TARGET="bin-i386-efi/ipxe.efi";      OUTPUT_NAME="ipxe-ia32.efi"  ;;
    efi-arm64) MAKE_TARGET="bin-arm64-efi/ipxe.efi";     OUTPUT_NAME="ipxe-arm64.efi" ;;
    snp-x64)   MAKE_TARGET="bin-x86_64-efi/snponly.efi"; OUTPUT_NAME="snponly-x64.efi";;
    bios)      MAKE_TARGET="bin/undionly.kpxe";           OUTPUT_NAME="undionly.kpxe"  ;;
    *) die "Unknown platform: '$PLATFORM'. Run with --help for valid platforms." ;;
esac

# ── Validate inputs ───────────────────────────────────────────────────────────
[[ -d "$SRC_DIR" ]] || die "src/ directory not found at $SRC_DIR"

EMBED_ARG=""
if [[ -n "$EMBED" ]]; then
    # Resolve relative to repo root, not src/
    EMBED_ABS="$(realpath "$EMBED" 2>/dev/null)" || die "Embed script not found: $EMBED"
    [[ -f "$EMBED_ABS" ]] || die "Embed script not found: $EMBED"
    EMBED_ARG="EMBED=$EMBED_ABS"
    info "Embed script: $EMBED_ABS"
fi

# ── Build ─────────────────────────────────────────────────────────────────────
mkdir -p "$OUTPUT_DIR"

echo -e "${C_BOLD}Platform:${C_RESET} $PLATFORM  →  $MAKE_TARGET"
echo -e "${C_BOLD}Jobs:${C_RESET}     $JOBS"
echo -e "${C_BOLD}Output:${C_RESET}   $OUTPUT_DIR/$OUTPUT_NAME"
echo ""

info "Starting build…"

make -C "$SRC_DIR" \
    "$MAKE_TARGET"  \
    $EMBED_ARG      \
    -j "$JOBS"

# ── Copy output ───────────────────────────────────────────────────────────────
BUILT_BIN="$SRC_DIR/$MAKE_TARGET"
[[ -f "$BUILT_BIN" ]] || die "Build succeeded but output not found: $BUILT_BIN"

cp "$BUILT_BIN" "$OUTPUT_DIR/$OUTPUT_NAME"

# Also write a sidecar with build info
cat > "$OUTPUT_DIR/$OUTPUT_NAME.info" <<EOF
platform=$PLATFORM
target=$MAKE_TARGET
embed=${EMBED:-none}
built=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
git=$(git -C "$(dirname "$0")" describe --always --dirty 2>/dev/null || echo unknown)
EOF

echo ""
ok "Built:  $OUTPUT_DIR/$OUTPUT_NAME"
ok "Info:   $OUTPUT_DIR/$OUTPUT_NAME.info"