#!/bin/sh
set -eu

version_bootstrap=20171003

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

# Prepare source
mkdir -p "go1.4-bootstrap-$version_bootstrap"
tar xf "$dir_download/go1.4-bootstrap-$version_bootstrap.tar.gz" -C "go1.4-bootstrap-$version_bootstrap" --strip-components 1
cd "go1.4-bootstrap-$version_bootstrap"

# Build and install
(cd src; ./make.bash)
rm -rf pkg/obj src/cmd src/internal src/builtin
find src -type f \( ! -name "*.go" \) -delete
find src -type f \( -name "*_test.go" -o -name "*_test_*.go" \) -delete
find src -type d -name "testdata" -exec rm -r {} +
find src -type d -empty -delete
mkdir -p "$dir_install"
cp -at "$dir_install" bin pkg src