#!/bin/sh

which cargo >/dev/null 2>&1
if [ "0" != "${?}" ]; then
  echo "Missing Rust, installing it using rustup"
  curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
fi

_uname="$(uname)"
case "${_uname}" in
  Darwin)
    # local dev utils
    cargo install xargo
    cargo install flamegraph

    # cross compile to Linux-x86_64:
    rustup toolchain install nightly
    rustup target add x86_64-unknown-linux-gnu
    rustup +nightly component add rust-src
    brew tap SergioBenitez/osxct
    brew install x86_64-unknown-linux-gnu

    _origin="https://software.verknowsys.com/c/libssl-dev_1.1.1n-0%2Bdeb11u3_amd64.deb"
    _basename="${_origin##*/}"
    unpack_openssl_linux () {
      curl -O "${_origin}"
      ar -x "${_basename}"
      tar xf data.tar.xz
      rm -rf "${_basename}"
    }
    (mkdir -p ./target && cd ./target && unpack_openssl_linux)

    _cwd="$(pwd)"

    # setup some env variables for the cross compiler to statically link with the OpenSSL library:
    export OPENSSL_LIB_DIR="${_cwd}/target/usr/lib/x86_64-linux-gnu"
    export OPENSSL_INCLUDE_DIR="${_cwd}/target/usr/include"
    export TARGET_CFLAGS="-I${_cwd}/target/usr/include/x86_64-linux-gnu"

    # pick proper cross linker for cargo:
    export CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_LINKER=x86_64-unknown-linux-gnu-gcc

    # override CC, CPP, LD and the STRIP for the cross compilation:
    export LD=/opt/homebrew/Cellar/x86_64-unknown-linux-gnu/7.2.0/bin/x86_64-unknown-linux-gnu-gcc
    export CC=/opt/homebrew/Cellar/x86_64-unknown-linux-gnu/7.2.0/bin/x86_64-unknown-linux-gnu-gcc
    export CPP=/opt/homebrew/Cellar/x86_64-unknown-linux-gnu/7.2.0/bin/x86_64-unknown-linux-gnu-cpp
    export STRIP=/opt/homebrew/Cellar/x86_64-unknown-linux-gnu/7.2.0/bin/x86_64-unknown-linux-gnu-strip
    ;;

  Linux)
    apt install -y pkg-config libssl-dev
    ;;
esac


_cargo_env="$HOME/.cargo/env"
if [ -f "${_cargo_env}" ]; then
  echo "Loading ${_cargo_env}"
  . "${_cargo_env}"
fi