#!/bin/sh
# script/build-bin: run script/build, then bundle the built dist/ into one
# executable, bin/quak, which reports the version script/build stamped. Our own
# extension to scripts-to-rule-them-all.
#
# bun compiles the binary from a copy of its own executable, so the binary
# loads the same libraries as the bun that built it. nix's bun loads libraries
# from the nix store: on Linux its C library, on macOS its ICU. A binary
# compiled from it loads them too. nix-collect-garbage can delete them, and the
# binary then no longer starts. This script therefore compiles with bun's own
# release build, which loads only the system's libraries. It downloads that
# build and checks it against the hash below before running it.
set -eu

ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"

# bun 1.3.13, 2026-11-11, and the SHA-256 of each release archive below. The
# x86-64 archives are the baseline builds, which also run on CPUs without AVX2.
# The musl archives are for Linux systems that use the musl C library, such as
# Alpine.
BUN_VERSION="1.3.13"
BUN_LINUX_X64_BASELINE_SHA256="9d8a24292a7068090205daac0a5a223f5f69736f5287e37bf88d3b4031edc750"
BUN_LINUX_X64_MUSL_BASELINE_SHA256="88ca7c7ad235b498f549eea2f770f434e9f0f5e9ba95168a2d3a1f235184c394"
BUN_LINUX_AARCH64_SHA256="70bae41b3908b0a120e1e58c5c8af30e74afae3b8d11b0d3fdd8e787ddfb4b22"
BUN_LINUX_AARCH64_MUSL_SHA256="5385e978107ce4934298d8d6afe9bfbb898683f6cc23e6753a0da60bc60c5b81"
BUN_DARWIN_X64_BASELINE_SHA256="a98ba6a480f22fda9b343626b906a4e26aa53618bf85d2bc5928ecf2ba45f0ed"
BUN_DARWIN_AARCH64_SHA256="5467e3f65dba526b9fea98f0cce04efafc0c63e169733ec27b876a3ad32da190"

# compile_with_downloaded_bun <archive-name> <sha256>
compile_with_downloaded_bun() {
    tmp="$(mktemp -d)"
    trap 'rm -rf "$tmp"' EXIT
    curl -fsSL -o "$tmp/$1.zip" \
        "https://github.com/oven-sh/bun/releases/download/bun-v$BUN_VERSION/$1.zip"
    # macOS always has shasum, but not every macOS has sha256sum.
    if command -v sha256sum >/dev/null 2>&1; then
        echo "$2  $tmp/$1.zip" | sha256sum -c -
    else
        echo "$2  $tmp/$1.zip" | shasum -a 256 -c -
    fi
    unzip -q "$tmp/$1.zip" -d "$tmp"
    "$tmp/$1/bun" build dist/bin/quak.js --compile --outfile bin/quak
}

main() {
    cd "$ROOT"
    "$ROOT/script/build"
    platform="$(uname -s)-$(uname -m)"
    # musl's ldd begins its version output with "musl libc"; glibc's does not.
    if ldd --version 2>&1 | grep -q '^musl libc'; then
        platform="$platform-musl"
    fi
    case "$platform" in
        Linux-x86_64)
            compile_with_downloaded_bun bun-linux-x64-baseline \
                "$BUN_LINUX_X64_BASELINE_SHA256"
            ;;
        Linux-x86_64-musl)
            compile_with_downloaded_bun bun-linux-x64-musl-baseline \
                "$BUN_LINUX_X64_MUSL_BASELINE_SHA256"
            ;;
        Linux-aarch64)
            compile_with_downloaded_bun bun-linux-aarch64 \
                "$BUN_LINUX_AARCH64_SHA256"
            ;;
        Linux-aarch64-musl)
            compile_with_downloaded_bun bun-linux-aarch64-musl \
                "$BUN_LINUX_AARCH64_MUSL_SHA256"
            ;;
        Darwin-x86_64)
            compile_with_downloaded_bun bun-darwin-x64-baseline \
                "$BUN_DARWIN_X64_BASELINE_SHA256"
            ;;
        Darwin-arm64)
            compile_with_downloaded_bun bun-darwin-aarch64 \
                "$BUN_DARWIN_AARCH64_SHA256"
            ;;
        *)
            echo "build-bin: bun has no release build for $(uname -s) on $(uname -m)" >&2
            exit 1
            ;;
    esac
}

main "$@"