#!/bin/bash --verbose
set -e

SRC_DIR=$(dirname $(rustup which rustc))"/../lib/rustlib/src/rust/"
DST_DIR="target/libcore"

if [ ! -e $SRC_DIR ]; then
    echo "Please install rust-src component"
    exit 1
fi

rm -rf $DST_DIR
mkdir -p $DST_DIR/src
cp -r $SRC_DIR/src $DST_DIR/

pushd $DST_DIR
git init
git add .
git commit -m "Initial commit" -q
git apply ../../000*.patch
popd

# `alloc_system` has been merged with libstd, which doesn't build yet.
# This copies the original source to the sysroot source dir to simplify building it
cp -r alloc_system $DST_DIR/src/liballoc_system

echo "Successfully prepared libcore for building"