SWAMPy

✎ CARVE FLESH

EDITING: canvas_rails_switcher.rb

# frozen_string_literal: true

#
# Copyright (C) 2016 - present Instructure, Inc.
#
# This file is part of Canvas.
#
# Canvas is free software: you can redistribute it and/or modify it under
# the terms of the GNU Affero General Public License as published by the Free
# Software Foundation, version 3 of the License.
#
# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
# details.
#
# You should have received a copy of the GNU Affero General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/>.

# This config file is used for switching environment variables
# that need to be set before rails initialization even starts.
# That's why it is required directly from the Gemfile.

# You can set the Rails version to use by:
# 1. CANVAS_RAILS="<supported version>"
# 2. Create a file RAILS_VERSION with <supported version> as the contents
# 3. Create a Consul setting private/canvas/rails_version with <supported version> as the contents

# the default version (corresponding to the bare Gemfile.lock) must be listed first
SUPPORTED_RAILS_VERSIONS = %w[7.0].freeze

unless defined?(CANVAS_RAILS)
  file_path = File.expand_path("RAILS_VERSION", __dir__)

if ENV["CANVAS_RAILS"]
    CANVAS_RAILS = ENV["CANVAS_RAILS"]
  elsif File.exist?(file_path)
    CANVAS_RAILS = File.read(file_path).strip
  else
    begin
      # have to do the consul communication without any gems, because
      # we're in the context of loading the gemfile
      require "base64"
      require "json"
      require "net/http"
      require "yaml"

environment = YAML.safe_load(File.read(File.expand_path("consul.yml", __dir__))).dig(ENV["RAILS_ENV"] || "development", "environment")

keys = [
        ["private/canvas", environment, $canvas_cluster, "rails_version"].compact.join("/"),
        ["private/canvas", environment, "rails_version"].compact.join("/"),
        ["private/canvas", "rails_version"].compact.join("/"),
        ["global/private/canvas", environment, "rails_version"].compact.join("/"),
        ["global/private/canvas", "rails_version"].compact.join("/")
      ].uniq

result = nil
      keys.each do |key|
        result = Net::HTTP.get_response(URI("http://localhost:8500/v1/kv/#{key}?stale"))
        result = nil unless result.is_a?(Net::HTTPSuccess)
        break if result
      end
      CANVAS_RAILS = result ? Base64.decode64(JSON.parse(result.body).first["Value"]).strip : SUPPORTED_RAILS_VERSIONS.first
    rescue
      CANVAS_RAILS = SUPPORTED_RAILS_VERSIONS.first
    end
  end
end

unless SUPPORTED_RAILS_VERSIONS.any?(CANVAS_RAILS)
  raise "unsupported Rails version specified #{CANVAS_RAILS}"
end

CANCEL

Name	Type	Size	Modified	Actions
↩ ..	DIR	—	—
📁 environments/	DIR	—	2023-09-24 03:39
📁 feature_flags/	DIR	—	2023-09-24 03:39
📁 initializers/	DIR	—	2023-09-24 03:39
📁 locales/	DIR	—	2023-09-24 03:39
📁 saml/	DIR	—	2023-09-24 03:36
📄 amazon_s3.yml.example	EXAMPLE	369 B	2023-09-24 03:36	EDIT
📄 application.rb	RB	14.2 KB	2023-09-24 03:39	EDIT
📄 boot.rb	RB	942 B	2023-09-24 03:36	EDIT
📄 bounce_notifications.yml.example	EXAMPLE	318 B	2023-09-24 03:36	EDIT
📄 brakeman.ignore	IGNORE	109 KB	2023-09-24 03:39	EDIT
📄 brakeman.yml	YML	328 B	2023-09-24 03:36	EDIT
📄 brandable_css.yml	YML	752 B	2023-09-24 03:36	EDIT
📄 browsers.yml	YML	556 B	2023-09-24 03:36	EDIT
📄 cache_store.yml.example	EXAMPLE	524 B	2023-09-24 03:36	EDIT
📄 canvas_cdn.yml.example	EXAMPLE	431 B	2023-09-24 03:36	EDIT
📄 canvas_rails_switcher.rb	RB	2.8 KB	2023-09-24 03:39	EDIT
📄 cassandra.yml.example	EXAMPLE	2.2 KB	2023-09-24 03:36	EDIT
📄 consul.yml.example	EXAMPLE	340 B	2023-09-24 03:36	EDIT
📄 copyright-template.js	JS	707 B	2023-09-24 03:36	EDIT
📄 credentials.test.yml	YML	85 B	2023-09-24 03:36	EDIT
📄 crystalball.yml	YML	1.1 KB	2023-09-24 03:36	EDIT
📄 cutycapt.yml.example	EXAMPLE	70 B	2023-09-24 03:36	EDIT
📄 database.yml	YML	554 B	2023-09-24 03:58	EDIT
📄 database.yml.example	EXAMPLE	560 B	2023-09-24 03:36	EDIT
📄 database.yml.travis	TRAVIS	71 B	2023-09-24 03:36	EDIT
📄 delayed_jobs.yml.example	EXAMPLE	755 B	2023-09-24 03:36	EDIT
📄 docker-compose.override.yml.example	EXAMPLE	3.1 KB	2023-09-24 03:39	EDIT
📄 domain.yml.example	EXAMPLE	539 B	2023-09-24 03:36	EDIT
📄 dynamic_settings.yml	YML	8.2 KB	2023-09-24 03:56	EDIT
📄 dynamic_settings.yml.example	EXAMPLE	8.2 KB	2023-09-24 03:39	EDIT
📄 dynamodb.yml.example	EXAMPLE	564 B	2023-09-24 03:36	EDIT
📄 environment.rb	RB	951 B	2023-09-24 03:36	EDIT
📄 external_migration.yml.example	EXAMPLE	490 B	2023-09-24 03:36	EDIT
📄 file_store.yml.example	EXAMPLE	357 B	2023-09-24 03:36	EDIT
📄 incoming_mail.yml.example	EXAMPLE	1.9 KB	2023-09-24 03:36	EDIT
📄 local_cache.yml.example	EXAMPLE	1 KB	2023-09-24 03:36	EDIT
📄 logging.yml.example	EXAMPLE	501 B	2023-09-24 03:36	EDIT
📄 marginalia.yml.example	EXAMPLE	460 B	2023-09-24 03:36	EDIT
📄 memcache.yml.example	EXAMPLE	75 B	2023-09-24 03:36	EDIT
📄 notification_failures.yml.example	EXAMPLE	347 B	2023-09-24 03:36	EDIT
📄 notification_service.yml.example	EXAMPLE	164 B	2023-09-24 03:36	EDIT
📄 offline_web.yml.sample	SAMPLE	225 B	2023-09-24 03:36	EDIT
📄 outgoing_mail.yml	YML	1.2 KB	2023-09-24 03:58	EDIT
📄 outgoing_mail.yml.example	EXAMPLE	1.2 KB	2023-09-24 03:36	EDIT
📄 periodic_jobs.yml.example	EXAMPLE	455 B	2023-09-24 03:36	EDIT
📄 puma.rb	RB	726 B	2023-09-24 03:36	EDIT
📄 redis.yml.example	EXAMPLE	1 KB	2023-09-24 03:36	EDIT
📄 routes.rb	RB	149.4 KB	2023-09-24 03:39	EDIT
📄 saml.yml.example	EXAMPLE	782 B	2023-09-24 03:36	EDIT
📄 security.yml.example	EXAMPLE	397 B	2023-09-24 03:36	EDIT
📄 selenium.yml.example	EXAMPLE	460 B	2023-09-24 03:36	EDIT
📄 sentry.yml.example	EXAMPLE	357 B	2023-09-24 03:36	EDIT
📄 session_store.yml.example	EXAMPLE	545 B	2023-09-24 03:36	EDIT
📄 spring.rb	RB	225 B	2023-09-24 03:36	EDIT
📄 statsd.yml.example	EXAMPLE	98 B	2023-09-24 03:36	EDIT
📄 styleguide.yml	YML	545 B	2023-09-24 03:36	EDIT
📄 testrail.yml.example	EXAMPLE	99 B	2023-09-24 03:36	EDIT
📄 twilio.yml.example	EXAMPLE	89 B	2023-09-24 03:36	EDIT
📄 twitter.yml.example	EXAMPLE	176 B	2023-09-24 03:36	EDIT
📄 vault.yml.example	EXAMPLE	788 B	2023-09-24 03:36	EDIT
📄 vault_contents.yml.example	EXAMPLE	2.1 KB	2023-09-24 03:39	EDIT