Setup Spanner Emulator

create_instance_and_database.rb

# frozen_string_literal: true

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"
  gem "google-cloud-spanner"
end

require "google/cloud/spanner"

project_id = ARGV[0]
instance_id = ARGV[1]
database_id = ARGV[2]

ENV["SPANNER_EMULATOR_HOST"] = "localhost:9010"

client = Google::Cloud::Spanner.new(project_id: project_id)

if client.instance(instance_id)
  puts "Instance already exists: `#{instance_id}`"
else
  client.create_instance(
    instance_id,
    name: instance_id,
    config: "emulator-config",
    nodes: 1,
  ).wait_until_done!
  puts "Create Spanner instance: `#{instance_id}`"
end

instance = client.instance(instance_id)

if instance.database(database_id)
  puts "Database already exists: `#{database_id}`"
else
  instance.create_database(database_id).wait_until_done!
  puts "Created Spanner database: `#{database_id}`"
end