Bootstrap go

build_go.sh

#!/bin/bash

############ SETTINGS ############
PREFIX=/usr
_GOVERS="1.18.1"
PATCH_CERTS=0
##################################

set -e
set -x

ensure_root() { if [[ "$EUID" -ne 0 ]]; then echo "Please run as root"; exit 1; fi }
ensure_root;

[[ -d $PREFIX/bin/go ]] && echo "$PREFIX/bin/go exists, remove it first" && exit 1;

export CGO_ENABLED=0
echo "Get bootstrapper.."
if ! [[ -d $PREFIX/bin/go ]]; then
	mkdir -p $PREFIX/bin/go/bootstrap && cd $PREFIX/bin/go/bootstrap
	wget https://storage.googleapis.com/golang/go1.4.3.src.tar.gz
	tar zxf go1.4.3.src.tar.gz
	mv go go1.4
else
	cd $PREFIX/bin/go/bootstrap
fi;

echo "Compile bootstrapper.."
cd ./go1.4/src

if ! [[ -f .bootstrapped ]]; then
	./make.bash
	! [[ $? -eq 0 ]] && exit 1;
	echo "successfuly built bootstrapper (go1.4)"
	touch .bootstrapped
fi

if ! [[ -f .built$_GOVERS ]]; then
	echo "Building go$_GOVERS"
	cd $PREFIX/bin/go

	wget https://redirector.gvt1.com/edgedl/go/go$_GOVERS.src.tar.gz
	tar zxf go$_GOVERS.src.tar.gz -C $PREFIX/bin
	cd $PREFIX/bin/go/src

	if [[ $PATCH_CERTS -eq 1 ]]; then
		if ! [[ -f .dlcerts ]]; then
			echo "Downloading ca-bundle.crt"
			wget -O $PREFIX/ssl/certs/ca-certificates.crt https://raw.githubusercontent.com/bagder/ca-bundle/master/ca-bundle.crt
			! [[ $? -eq 0 ]] && exit 1;
			echo "Got cert bundle ok."
			touch .dlcerts
		fi

		if ! [[ -f .patch_crt ]]; then
			echo "Patching crypto/x509/root_linux.go with ca-bundle.crt location"
			sed -i 's,\/etc\/ssl\/certs\/ca-certificates.crt,'"$PREFIX"'\/ssl\/certs\/ca-certificates.crt,g' ./crypto/x509/root_linux.go
			! [[ $? -eq 0 ]] && exit 1;
			echo "Patched root_linux.go"
			touch .patch_crt
		fi
	fi

	GOROOT_BOOTSTRAP=$PREFIX/bin/go/bootstrap/go1.4 ./make.bash
	! [[ $? -eq 0 ]] && exit 1;
	touch .built$_GOVERS
	echo "successfuly built go compiler v$_GOVERS"

	echo;
	echo "Go compiler returned no errors. Congrats."
	echo "Go v$_GOVERS has been installed."
	echo;
fi

#if ! [[ -d $HOME/go ]]; then
#	mkdir -p $HOME/go;
#	echo "Created go work dir: $HOME/go";
#fi

echo "Make sure $PREFIX/bin/go/bin is in your PATH."
echo "To test, run 'go version'";