473 lines
16 KiB
Ruby
473 lines
16 KiB
Ruby
require 'open3'
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module Rails
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module Upgrading
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class ApplicationChecker
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def initialize
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@issues = []
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raise NotInRailsAppError unless in_rails_app?
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end
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def in_rails_app?
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File.exist?("config/environment.rb")
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end
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# Run all the check methods
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def run
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# Ruby 1.8 returns method names as strings whereas 1.9 uses symbols
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the_methods = (self.public_methods - Object.methods) - [:run, :initialize, "run", "initialize"]
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the_methods.each {|m| send m }
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end
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# Check for deprecated ActiveRecord calls
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def check_ar_methods
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files = []
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["find(:all", "find(:first", "find.*:conditions =>", ":joins =>"].each do |v|
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lines = grep_for(v, "app/")
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files += extract_filenames(lines) || []
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end
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unless files.empty?
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alert(
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"Soon-to-be-deprecated ActiveRecord calls",
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"Methods such as find(:all), find(:first), finds with conditions, and the :joins option will soon be deprecated.",
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"http://m.onkey.org/2010/1/22/active-record-query-interface",
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files
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)
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end
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lines = grep_for("named_scope", "app/models/")
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files = extract_filenames(lines)
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if files
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alert(
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"named_scope is now just scope",
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"The named_scope method has been renamed to just scope.",
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"http://github.com/rails/rails/commit/d60bb0a9e4be2ac0a9de9a69041a4ddc2e0cc914",
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files
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)
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end
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end
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def check_validation_on_methods
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files = []
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["validate_on_create", "validate_on_update"].each do |v|
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lines = grep_for(v, "app/models/")
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files += extract_filenames(lines) || []
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end
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unless files.empty?
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alert(
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"Updated syntax for validate_on_* methods",
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"Validate-on-callback methods (validate_on_create/validate_on_destroy) have been changed to validate :x, :on => :create",
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"https://rails.lighthouseapp.com/projects/8994/tickets/3880-validate_on_create-and-validate_on_update-no-longer-seem-to-exist",
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files
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)
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end
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end
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def check_before_validation_on_methods
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files = []
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%w(before_validation_on_create before_validation_on_update).each do |v|
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lines = grep_for(v, "app/models/")
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files += extract_filenames(lines) || []
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end
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unless files.empty?
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alert(
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"Updated syntax for before_validation_on_* methods",
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"before_validation_on_* methods have been changed to before_validation(:on => :create/:update) { ... }",
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"https://rails.lighthouseapp.com/projects/8994/tickets/4699-before_validation_on_create-and-before_validation_on_update-doesnt-exist",
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files
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)
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end
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end
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# Check for deprecated router syntax
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def check_routes
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lines = ["map\\.", "ActionController::Routing::Routes", "\\.resources"].map do |v|
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grep_for(v, "config/routes.rb").empty? ? nil : true
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end.compact
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unless lines.empty?
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alert(
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"Old router API",
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"The router API has totally changed.",
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"http://yehudakatz.com/2009/12/26/the-rails-3-router-rack-it-up/",
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"config/routes.rb"
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)
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end
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end
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# Check for deprecated test_help require
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def check_test_help
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files = []
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# Hate to duplicate code, but we have to double quote this one...
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lines = grep_for("\'test_help\'", "test/", true)
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files += extract_filenames(lines) || []
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lines = grep_for("\"test_help\"", "test/")
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files += extract_filenames(lines) || []
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files.uniq!
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unless files.empty?
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alert(
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"Deprecated test_help path",
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"You now must require 'rails/test_help' not just 'test_help'.",
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"http://weblog.rubyonrails.org/2009/9/1/gem-packaging-best-practices",
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files
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)
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end
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end
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# Check for old (pre-application.rb) environment.rb file
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def check_environment
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unless File.exist?("config/application.rb")
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alert(
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"New file needed: config/application.rb",
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"You need to add a config/application.rb.",
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"http://omgbloglol.com/post/353978923/the-path-to-rails-3-approaching-the-upgrade",
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"config/application.rb"
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)
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end
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lines = grep_for("config.", "config/environment.rb")
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unless lines.empty?
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alert(
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"Old environment.rb",
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"environment.rb doesn't do what it used to; you'll need to move some of that into application.rb.",
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"http://omgbloglol.com/post/353978923/the-path-to-rails-3-approaching-the-upgrade",
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"config/environment.rb"
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)
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end
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end
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# Check for deprecated constants
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def check_deprecated_constants
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files = []
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["RAILS_ENV", "RAILS_ROOT", "RAILS_DEFAULT_LOGGER"].each do |v|
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lines = grep_for(v, "app/")
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files += extract_filenames(lines) || []
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lines = grep_for(v, "lib/")
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files += extract_filenames(lines) || []
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end
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unless files.empty?
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alert(
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"Deprecated constant(s)",
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"Constants like RAILS_ENV, RAILS_ROOT, and RAILS_DEFAULT_LOGGER are now deprecated.",
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"http://litanyagainstfear.com/blog/2010/02/03/the-rails-module/",
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files.uniq
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)
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end
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end
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# Check for old-style config.gem calls
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def check_gems
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lines = grep_for("config.gem ", "config/*.rb")
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files = extract_filenames(lines)
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if files
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alert(
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"Old gem bundling (config.gems)",
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"The old way of bundling is gone now. You need a Gemfile for bundler.",
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"http://omgbloglol.com/post/353978923/the-path-to-rails-3-approaching-the-upgrade",
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files
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)
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end
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end
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# Checks for old mailer syntax in both mailer classes and those
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# classes utilizing the mailers
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def check_mailers
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lines = grep_for("deliver_", "app/models/ #{base_path}app/controllers/ #{base_path}app/observers/")
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files = extract_filenames(lines)
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if files
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alert(
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"Deprecated ActionMailer API",
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"You're using the old ActionMailer API to send e-mails in a controller, model, or observer.",
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"http://lindsaar.net/2010/1/26/new-actionmailer-api-in-rails-3",
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files
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)
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end
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files = []
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["recipients ", "attachment(?!s) ", "(?<!:)subject ", "(?<!:)from "].each do |v|
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lines = grep_for_with_perl_regex(v, "app/models/")
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files += extract_filenames(lines) || []
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end
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unless files.empty?
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alert(
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"Old ActionMailer class API",
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"You're using the old API in a mailer class.",
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"http://lindsaar.net/2010/1/26/new-actionmailer-api-in-rails-3",
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files
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)
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end
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end
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# Checks for old-style generators
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def check_generators
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generators = Dir.glob(base_path + "vendor/plugins/**/generators/**/")
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unless generators.empty?
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files = generators.reject do |g|
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grep_for("def manifest", g).empty?
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end.compact
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if !files.empty?
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alert(
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"Old Rails generator API",
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"A plugin in the app is using the old generator API (a new one may be available at http://github.com/trydionel/rails3-generators).",
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"http://blog.plataformatec.com.br/2010/01/discovering-rails-3-generators/",
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files
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)
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end
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end
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end
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# Checks a list of known broken plugins and gems
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def check_plugins
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# This list is off the wiki; will need to be updated often, esp. since RSpec is working on it
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bad_plugins = ["rspec", "rspec-rails", "hoptoad", "authlogic", "nifty-generators",
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"restful_authentication", "searchlogic", "cucumber", "cucumber-rails", "devise",
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"inherited_resources"]
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bad_plugins = bad_plugins.map do |p|
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p if File.exist?("#{base_path}vendor/plugins/#{p}") || !Dir.glob("#{base_path}vendor/gems/#{p}-*").empty?
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end.compact
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unless bad_plugins.empty?
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alert(
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"Known broken plugins",
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"At least one plugin in your app is broken (according to the wiki). Most of project maintainers are rapidly working towards compatability, but do be aware you may encounter issues.",
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"http://wiki.rubyonrails.org/rails/version3/plugins_and_gems",
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bad_plugins
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)
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end
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end
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# Checks for old-style ERb helpers
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def check_old_helpers
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lines = grep_for("<% .*content_tag.* do.*%>", "app/views/**/*")
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lines += grep_for("<% .*javascript_tag.* do.*%>", "app/views/**/*")
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lines += grep_for("<% .*form_for.* do.*%>", "app/views/**/*")
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lines += grep_for("<% .*form_tag.* do.*%>", "app/views/**/*")
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lines += grep_for("<% .*fields_for.* do.*%>", "app/views/**/*")
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lines += grep_for("<% .*field_set_tag.* do.*%>", "app/views/**/*")
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files = extract_filenames(lines)
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if files
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alert(
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"Deprecated ERb helper calls",
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"Block helpers that use concat (e.g., form_for) should use <%= instead of <%. The current form will continue to work for now, but you will get deprecation warnings since this form will go away in the future.",
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"http://weblog.rubyonrails.org/",
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files
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)
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end
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end
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# Checks for old-style AJAX helpers
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def check_old_ajax_helpers
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files = []
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['link_to_remote','form_remote_tag','remote_form_for'].each do |type|
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lines = grep_for(type, "app/views/**/*")
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inner_files = extract_filenames(lines)
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files += inner_files unless inner_files.nil?
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end
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unless files.empty?
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alert(
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"Deprecated AJAX helper calls",
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"AJAX javascript helpers have been switched to be unobtrusive and use :remote => true instead of having a seperate function to handle remote requests.",
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"http://www.themodestrubyist.com/2010/02/24/rails-3-ujs-and-csrf-meta-tags/",
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files
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)
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end
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end
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# Checks for old cookie secret settings
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def check_old_cookie_secret
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lines = grep_for("ActionController::Base.cookie_verifier_secret = ", "config/**/*")
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files = extract_filenames(lines)
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if files
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alert(
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"Deprecated cookie secret setting",
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"Previously, cookie secret was set directly on ActionController::Base; it's now config.secret_token.",
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"http://lindsaar.net/2010/4/7/rails_3_session_secret_and_session_store",
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files
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)
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end
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end
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def check_old_session_secret
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lines = grep_for("ActionController::Base.session = {", "config/**/*")
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files = extract_filenames(lines)
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if files
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alert(
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"Deprecated session secret setting",
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"Previously, session secret was set directly on ActionController::Base; it's now config.secret_token.",
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"http://lindsaar.net/2010/4/7/rails_3_session_secret_and_session_store",
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files
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)
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end
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end
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# Checks for old session settings
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def check_old_session_setting
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lines = grep_for("ActionController::Base.session_store", "config/**/*")
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files = extract_filenames(lines)
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if files
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alert(
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"Old session store setting",
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"Previously, session store was set directly on ActionController::Base; it's now config.session_store :whatever.",
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"http://lindsaar.net/2010/4/7/rails_3_session_secret_and_session_store",
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files
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)
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end
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end
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private
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def grep_for_with_perl_regex(text, where = "./", double_quote = false)
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grep_for(text, where, double_quote, true)
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end
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# Find a string in a set of files; calls +find_with_grep+ and +find_with_rak+
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# depending on platform.
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#
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# TODO: Figure out if this works on Windows.
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def grep_for(text, where = "./", double_quote = false, perl_regex = false)
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# If they're on Windows, they probably don't have grep.
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@probably_has_grep ||= (Config::CONFIG['host_os'].downcase =~ /mswin|windows|mingw/).nil?
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# protect against double root paths in Rails 3
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where.gsub!(Regexp.new(base_path),'')
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lines = if @probably_has_grep
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find_with_grep(text, base_path + where, double_quote, perl_regex)
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else
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find_with_rak(text, base_path + where, double_quote)
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end
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# ignore comments
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lines.gsub /^(\/[^:]+:)?\s*#.+$/m, ""
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end
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# Sets a base path for finding files; mostly for testing
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def base_path
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Dir.pwd + "/"
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end
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# Use the grep utility to find a string in a set of files
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def find_with_grep(text, where, double_quote, perl_regex = false)
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value = ""
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# Specifically double quote for finding 'test_help'
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command = if double_quote
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"grep -r #{"-P" if perl_regex} --exclude=\*.svn\* \"#{text}\" #{where}"
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else
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"grep -r #{"-P" if perl_regex} --exclude=\*.svn\* '#{text}' #{where}"
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end
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Open3.popen3(command) do |stdin, stdout, stderr|
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value = stdout.read
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end
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value
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end
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# Use the rak gem to grep the files (not yet implemented)
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def find_with_rak(text, where, double_quote)
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value = ""
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Open3.popen3("rak --nogroup -l '#{Regexp.escape(text)}' #{where}") do |stdin, stdout, stderr|
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value = stdout.read
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end
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value
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end
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# Extract the filenames from the grep output
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def extract_filenames(output)
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if @probably_has_grep
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extract_filenames_from_grep(output)
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else
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extract_filenames_from_rak(output)
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end
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end
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def extract_filenames_from_grep(output)
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return nil if output.empty?
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output.split("\n").map do |fn|
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if m = fn.match(/^(.+?):/)
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m[1]
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end
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end.compact.uniq
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end
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def extract_filenames_from_rak(output)
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return nil if output.empty?
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output.split("\n").uniq
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end
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# Terminal colors, borrowed from Thor
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CLEAR = "\e[0m"
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BOLD = "\e[1m"
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RED = "\e[31m"
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YELLOW = "\e[33m"
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CYAN = "\e[36m"
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WHITE = "\e[37m"
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# Show an upgrade alert to the user
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def alert(title, text, more_info_url, culprits)
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if Config::CONFIG['host_os'].downcase =~ /mswin|windows|mingw/
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basic_alert(title, text, more_info_url, culprits)
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else
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color_alert(title, text, more_info_url, culprits)
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end
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end
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# Show an upgrade alert to the user. If we're on Windows, we can't
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# use terminal colors, hence this method.
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def basic_alert(title, text, more_info_url, culprits)
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puts "** " + title
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puts text
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puts "More information: #{more_info_url}"
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puts
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puts "The culprits: "
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Array(culprits).each do |c|
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puts "\t- #{c}"
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end
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puts
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end
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# Show a colorful alert to the user
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def color_alert(title, text, more_info_url, culprits)
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puts "#{RED}#{BOLD}#{title}#{CLEAR}"
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puts "#{WHITE}#{text}"
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puts "#{BOLD}More information:#{CLEAR} #{CYAN}#{more_info_url}"
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puts
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puts "#{WHITE}The culprits: "
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Array(culprits).each do |c|
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puts "#{YELLOW}\t- #{c}"
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end
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ensure
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puts "#{CLEAR}"
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end
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end
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end
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end
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