#!/bin/sh

golang_version="$1"

current_version=$(grep -o -e 'golang:[.0-9]*' .circleci/config.yml | head -n1 | cut -d: -f2)

# To support both GNU and BSD sed, the regex is looser than it needs to be.
# Specifically, we use "* instead of "?, which relies on GNU extension without much loss of
# correctness in practice.
sed -i'' -e "s|golang:[.0-9]*|golang:${golang_version}|g" \
       	.circleci/config/config.yml .circleci/config.yml
sed -i'' -e "s|GOLANG_VERSION:[ \"]*[.0-9]*\"*|GOLANG_VERSION: ${golang_version}|g" \
	.circleci/config/config.yml .circleci/config.yml

sed -i'' -e "s|\\(golang.org.*version\\) [.0-9]*|\\1 ${golang_version}|g" \
	README.md

sed -i'' -e "s|go[.0-9]*.windows-amd64.zip|go${golang_version}.windows-amd64.zip|g" \
	appveyor.yml

sed -i'' -e "s|go_version=\"*[^\"]*\"*$|go_version=\"${golang_version}\"|g" \
	scripts/vagrant-linux-priv-go.sh scripts/release/mac-remote-build

# check if there is any remaining references to old versions
if git grep -I --fixed-strings "${current_version}" | grep -v -e CHANGELOG.md -e vendor/
then
	echo "  ^^ files contain references to old golang version" >&2
	echo "  update script and run again" >&2
	exit 1
fi