#!/usr/bin/env bash

# scripts/bootstrap-macos.sh — bootstrap mcpp on macOS via xmake.

#

# Uses xmake (which has mature C++23 module support) to compile mcpp

# from source on macOS. This is the "Plan B" bootstrap: xmake handles

# module dependency scanning and compilation ordering automatically.

#

# Prerequisites:

# - xmake (brew install xmake or https://xmake.io)

# - Clang 20+ (xlings LLVM or Homebrew LLVM)

# - macOS SDK (xcode-select --install)

#

# Usage:

# ./scripts/bootstrap-macos.sh [LLVM_ROOT]

#

# Output:

# target/bootstrap/bin/mcpp

#

set -euo pipefail

PROJROOT="$(cd "$(dirname "$0")/.." && pwd)"

cd "$PROJROOT"

# ─── Locate LLVM ────────────────────────────────────────────────────────────

if [ -n "${1:-}" ] && [ -d "$1/bin" ]; then

LLVM_ROOT="$1"

elif [ -n "${LLVM_ROOT:-}" ]; then

: # already set via env

elif [ -d "$HOME/.xlings/data/xpkgs/xim-x-llvm" ]; then

LLVM_ROOT=$(find "$HOME/.xlings/data/xpkgs/xim-x-llvm" -maxdepth 1 -type d | sort -V | tail -1)

elif command -v brew >/dev/null 2>&1 && [ -d "$(brew --prefix llvm)/bin" ]; then

LLVM_ROOT=$(brew --prefix llvm)

else

echo "error: cannot find LLVM. Pass LLVM_ROOT or install via xlings/Homebrew." >&2

exit 1

fi

CXX="$LLVM_ROOT/bin/clang++"

echo ":: LLVM_ROOT = $LLVM_ROOT"

"$CXX" --version | head -1

# ─── Ensure xmake is available ───────────────────────────────────────────────

if ! command -v xmake >/dev/null 2>&1; then

echo ":: Installing xmake via Homebrew..."

brew install xmake

fi

echo ":: xmake $(xmake --version | head -1)"

# ─── Ensure xmake.lua exists ────────────────────────────────────────────────

if [ ! -f "$PROJROOT/xmake.lua" ]; then

echo ":: Generating xmake.lua for bootstrap..."

cat > "$PROJROOT/xmake.lua" << 'XMAKE'

-- Bootstrap xmake.lua for mcpp (macOS)

-- This file is auto-generated by scripts/bootstrap-macos.sh

add_rules("mode.release")

set_languages("c++23")

package("cmdline")

set_homepage("https://github.com/mcpplibs/cmdline")

set_description("Modern C++ command-line parsing library")

set_license("Apache-2.0")

add_urls("https://github.com/mcpplibs/cmdline/archive/refs/tags/$(version).tar.gz")

add_versions("0.0.1", "3fb2f5495c1a144485b3cbb2e43e27059151633460f702af0f3851cbff387ef0")

on_install(function (package)

import("package.tools.xmake").install(package)

end)

package_end()

add_requires("cmdline 0.0.1")

target("mcpp")

set_kind("binary")

add_files("src/main.cpp")

add_files("src/**.cppm")

add_packages("cmdline")

add_includedirs("src/libs/json")

set_policy("build.c++.modules", true)

XMAKE

fi

# ─── Build with xmake ────────────────────────────────────────────────────────

echo

echo ":: Building mcpp with xmake (LLVM/Clang toolchain)..."

echo

# Configure xmake to use the specified LLVM toolchain

xmake f -y -m release \

--toolchain=llvm \

--sdk="$LLVM_ROOT" \

2>&1 | tail -5

# Build

xmake build -y mcpp 2>&1

# ─── Stage output ────────────────────────────────────────────────────────────

echo

echo ":: Staging output..."

OUTDIR="$PROJROOT/target/bootstrap/bin"

mkdir -p "$OUTDIR"

# xmake puts output in build/<platform>/<arch>/release/mcpp

BUILT=$(find "$PROJROOT/build" -name mcpp -type f -perm +111 2>/dev/null | head -1)

if [ -z "$BUILT" ]; then

echo "error: mcpp binary not found in xmake build output" >&2

find "$PROJROOT/build" -type f 2>/dev/null | head -20

exit 1

fi

cp "$BUILT" "$OUTDIR/mcpp"

echo ":: SUCCESS: $OUTDIR/mcpp"

"$OUTDIR/mcpp" --version