#!/usr/bin/env ruby
require 'digest'

def verbose command
  puts("--> #{command}") || system(command) || fail("Failed: #{command}")
end

# Why not read node_modules/.package-lock.json? Because it's not the same.
hashfile = 'node_modules/.package-lock.json.hash'
current = Digest::SHA2.file('package-lock.json').hexdigest
expected = File.read(hashfile) if File.exists?(hashfile)

if expected != current
  puts 'Running npm ci to regenerate node_modules.'
  verbose('npm ci')
  File.write(hashfile, current)
else
  puts 'node_modules is up to date.'
end