#!/bin/sh
set -eu

version_rustc_bootstrap="$1"
version_rustc="$2"

case "$version_rustc" in
1.3[0-9].*|1.4[0-3].*)
    version_llvm=7.1.0 ;;
1.4[4-9].*|1.5[0-7].*)
    version_llvm=10.0.1 ;;
1.5[8-9].*|1.6[0-8].*)
    version_llvm=13.0.1 ;;
1.69.*|1.7[0-8].*)
    version_llvm=16.0.6 ;;
*)
    version_llvm=18.1.8 ;;
esac

case "$version_rustc" in
1.3[0-9].*|1.4[0-6].*)
    targets='src/libstd src/librustc cargo' ;;
1.4[7-9].*|1.5[0-9].*|1.6[0-1].*)
    targets='library/std src/librustc cargo' ;;
*)
    targets='library/std compiler/rustc cargo' ;;
esac

dir_download="$PWD/download"
mkdir -p build; cd build
dir_install="$PWD/install-rustc-$version_rustc"

# Prepare source
tar xf "$dir_download/rustc-$version_rustc-src.tar.xz"
cd "rustc-$version_rustc-src"

# Configure source
export PKG_CONFIG_PATH="$PWD/../install-openssl/lib/pkgconfig"
export OPENSSL_STATIC=1
./configure \
    --build="$("$PWD/../install-llvm-$version_llvm/bin/llvm-config" --host-target)" \
    --prefix="$dir_install" \
    --sysconfdir="$dir_install/etc" \
    --local-rust-root="$PWD/../install-rustc-$version_rustc_bootstrap" \
    --llvm-root="$PWD/../install-llvm-$version_llvm" \
    --enable-vendor \
    --release-channel=release

# Build and install
mkdir -p "$dir_install"
./x.py install --stage 2 $targets $MAKEFLAGS