Installation script for Nix on ChromeOS

chromebook-nix.sh

#!/bin/sh

sudo mount -o remount,exec /tmp

# I was unable to get nix 2.2.2 to install successfully on my chromebook.
NIX_VER=2.1.3
NIX_ID=nix-${NIX_VER}-x86_64-linux
NIX_LOC=/usr/local/nixstrap

if [ -x ${NIX_LOC}/proot-x86_64 ] && [ -h ~/.nix-profile ]; then
  echo "Launching shell with nix-* tools!"
  exec ${NIX_LOC}/proot-x86_64 -b ${NIX_LOC}/${NIX_ID}:/nix bash --init-file ~/.nix-profile/etc/profile.d/nix.sh
fi

set -ex

sudo mkdir -p $NIX_LOC
sudo chown chronos:chronos $NIX_LOC

cd $NIX_LOC

NIX_TAR=${NIX_ID}.tar.bz2
wget -O $NIX_TAR https://nixos.org/releases/nix/nix-${NIX_VER}/$NIX_TAR
tar xf $NIX_TAR
rm $NIX_TAR

wget -O proot-x86_64 'https://github.com/proot-me/proot-static-build/blob/master/static/proot-x86_64?raw=true'
chmod u+x proot-x86_64

./proot-x86_64 -b ${NIX_ID}:/nix /nix/install --no-daemon

set +x
echo "Installation successful."
echo "Run this script again to gain access to the Nix tools."