#!/bin/sh
set -eu

version_rustc_bootstrap="$1"
version_rustc="$2"
version_llvm="$3"

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
./configure \
    --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

case "$version_rustc"
1.3[0-9].*|1.4[0-6].*)
    paths='src/libstd src/librustc cargo' ;;
1.47.*|*)
    paths='library/std src/librustc cargo' ;;
esac

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