74 lines
2.7 KiB
Ruby
74 lines
2.7 KiB
Ruby
# frozen_string_literal: true
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#
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# Copyright (C) 2016 - present Instructure, Inc.
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#
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# This file is part of Canvas.
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#
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# Canvas is free software: you can redistribute it and/or modify it under
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# the terms of the GNU Affero General Public License as published by the Free
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# Software Foundation, version 3 of the License.
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#
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# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Affero General Public License along
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# with this program. If not, see <http://www.gnu.org/licenses/>.
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# This config file is used for switching environment variables
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# that need to be set before rails initialization even starts.
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# That's why it is required directly from the Gemfile.
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# You can set the Rails version to use by:
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# 1. CANVAS_RAILS="<supported version>"
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# 2. Create a file RAILS_VERSION with <supported version> as the contents
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# 3. Create a Consul setting private/canvas/rails_version with <supported version> as the contents
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DEFAULT_VERSION = "6.1"
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SUPPORTED_VERSIONS = %w[6.1 7.0].freeze
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unless defined?(CANVAS_RAILS)
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file_path = File.expand_path("RAILS_VERSION", __dir__)
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if ENV["CANVAS_RAILS"]
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CANVAS_RAILS = ENV["CANVAS_RAILS"]
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elsif File.exist?(file_path)
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CANVAS_RAILS = File.read(file_path).strip
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else
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begin
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# have to do the consul communication without any gems, because
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# we're in the context of loading the gemfile
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require "base64"
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require "json"
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require "net/http"
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require "yaml"
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environment = YAML.safe_load(File.read(File.expand_path("consul.yml", __dir__))).dig(ENV["RAILS_ENV"] || "development", "environment")
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keys = [
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["private/canvas", environment, $canvas_cluster, "rails_version"].compact.join("/"),
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["private/canvas", environment, "rails_version"].compact.join("/"),
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["private/canvas", "rails_version"].compact.join("/"),
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["global/private/canvas", environment, "rails_version"].compact.join("/"),
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["global/private/canvas", "rails_version"].compact.join("/")
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].uniq
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result = nil
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keys.each do |key|
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result = Net::HTTP.get_response(URI("http://localhost:8500/v1/kv/#{key}?stale"))
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result = nil unless result.is_a?(Net::HTTPSuccess)
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break if result
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end
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CANVAS_RAILS = result ? Base64.decode64(JSON.parse(result.body).first["Value"]).strip : DEFAULT_VERSION
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rescue
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CANVAS_RAILS = DEFAULT_VERSION
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end
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end
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end
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unless SUPPORTED_VERSIONS.any?(CANVAS_RAILS)
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raise "unsupported Rails version specified #{CANVAS_RAILS}"
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end
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