#!/usr/bin/env bash

set -euo pipefail

if  [[ -z "${BABASHKA_STATIC:-}" ]]; then
    echo "BABASHKA_STATIC wasn't set, skipping musl installation."
    exit 0
fi

if [[ -z "${BABASHKA_MUSL:-}" ]]; then
    echo "BABASHKA_MUSL wasn't set, skipping musl installation."
    exit 0
fi

# This script sets up the latest available musl-tools using apt pinning from Debian bullseye (11).
# The one available in stretch (Debian 9) is outdated and this ensures we get the latest improvements
# This explictly installs musl from bullseye and keeps the others at a higher priority
# TODO: remove after clojure image is updated to bullseye

cat >> /etc/apt/sources.list <<eof
deb http://ftp.us.debian.org/debian bullseye main non-free contrib
deb http://non-us.debian.org/debian-non-us bullseye/non-us main contrib non-free
eof

cat >> /etc/apt/preferences <<eof
Package: *
Pin: release a=stable
Pin-Priority: 700
Package: *
Pin: release a=testing
Pin-Priority: 650
Package: *
pin: release a=bullseye
pin-priority: 600
eof

apt-get update -y && apt-get install musl-tools/bullseye -y

ZLIB_VERSION="1.2.11"

curl -O -sL "https://zlib.net/zlib-${ZLIB_VERSION}.tar.gz"

echo "c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1 zlib-${ZLIB_VERSION}.tar.gz" |
    sha256sum --check
tar xf "zlib-${ZLIB_VERSION}.tar.gz"

arch=${BABASHKA_ARCH:-"x86_64"}
echo "ARCH: $arch"

cd "zlib-${ZLIB_VERSION}"
CC=musl-gcc ./configure --static --prefix="/usr/local"
make CC=musl-gcc
make install
cd ..

# Install libz.a in the correct place so ldd can find it
install -Dm644 "/usr/local/lib/libz.a" "/usr/lib/$arch-linux-musl/libz.a"