class EY::Serverside::RailsAssets
Attributes
config[R]
runner[R]
shell[R]
Public Class Methods
detect_and_compile(*args)
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# File lib/engineyard-serverside/rails_assets.rb, line 9 def self.detect_and_compile(*args) new(*args).detect_and_compile end
new(config, shell, runner)
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# File lib/engineyard-serverside/rails_assets.rb, line 15 def initialize(config, shell, runner) @config, @shell, @runner = config, shell, runner end
Public Instance Methods
active_revision()
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# File lib/engineyard-serverside/rails_assets.rb, line 78 def active_revision @active_revision ||= config.active_revision end
app_assets_path()
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# File lib/engineyard-serverside/rails_assets.rb, line 159 def app_assets_path paths.path(:active_release,'app','assets') end
app_disables_assets?()
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# File lib/engineyard-serverside/rails_assets.rb, line 137 def app_disables_assets? application_rb_path.open do |fd| fd.grep(/^[^#]*config\.assets\.enabled\s*=\s*(false|nil)/).any? end end
app_has_asset_task?()
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This check is very expensive, and has been deemed not worth the time. Leaving this here in case someone comes up with a faster way.
Runs ‘rake -T’ to see if there is an assets:precompile task.
# File lib/engineyard-serverside/rails_assets.rb, line 147 def app_has_asset_task? # We just run this locally on the app master; everybody else should # have the same code anyway. task_check = "PATH=#{paths.binstubs}:$PATH #{framework_envs} rake -T #{precompile_assets_task} | grep '#{precompile_assets_task}'" cmd = "cd #{paths.active_release} && #{task_check}" shell.logged_system(cmd).success? end
application_rb_path()
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# File lib/engineyard-serverside/rails_assets.rb, line 155 def application_rb_path paths.path(:active_release,'config','application.rb') end
asset_strategy()
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# File lib/engineyard-serverside/rails_assets.rb, line 163 def asset_strategy @asset_strategy ||= RailsAssets::Strategy.fetch(config.asset_strategy, paths, runner) end
detect_and_compile()
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# File lib/engineyard-serverside/rails_assets.rb, line 25 def detect_and_compile runner.roles asset_roles do if precompile_assets? if precompile_unchanged_assets? shell.status "Precompiling assets without change detection. (precompile_unchanged_assets: true)" run_precompile_assets_task elsif reuse_assets? shell.status "Reusing existing assets. (configured asset_dependencies unchanged from #{previous_revision[0,7]}..#{active_revision[0,7]})" asset_strategy.reuse else shell.status "Precompiling assets. (precompile_assets: true)" run_precompile_assets_task end elsif skip_precompile_assets? shell.status "Skipping asset precompilation. (precompile_assets: false)" elsif !application_rb_path.readable? || !app_assets_path.directory? # Not a Rails app. Ignore assets completely. elsif app_disables_assets? shell.status "Skipping asset precompilation. ('config/application.rb' disables assets.)" elsif paths.public_assets.exist? shell.status "Skipping asset precompilation. ('public/assets' directory already exists.)" else shell.status "Precompiling assets. ('app/assets' exists, 'public/assets' not found, not disabled in config.)" precompile_detected_assets end end end
precompile_detected_assets()
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# File lib/engineyard-serverside/rails_assets.rb, line 95 def precompile_detected_assets if !runner.rails_application? shell.warning "Precompiling assets even though Rails was not bundled." end run_precompile_assets_task shell.warning <<-WARN Assets were detected and precompiled for this application, but asset precompile failures may be silently ignored in the future. ACTION REQUIRED: Add or update config/ey.yml in your project to ensure assets are compiled every deploy and halted on failure. precompile_assets: true # precompile assets This warning will continue until you update and commit config/ey.yml. WARN rescue EY::Serverside::RemoteFailure => e # If we are implicitly precompiling, we want to fail non-destructively # because we don't know if the rake task exists or if the user # actually intended for assets to be compiled. if e.to_s =~ /Don't know how to build task '#{precompile_assets_task}'/ shell.warning <<-WARN Asset precompilation detected but compilation failure ignored! Rake task '#{precompile_assets_task}' was not found. ACTION REQUIRED: Add precompile_assets option to ey.yml. precompile_assets: false # disable assets to avoid this error. WARN else shell.error <<-ERROR Asset precompilation detected but compilation failed! ACTION REQUIRED: Add precompile_assets option to ey.yml. precompile_assets: true # precompile assets when asset changes detected precompile_assets: false # disable asset compilation. ERROR raise end end
previous_revision()
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# File lib/engineyard-serverside/rails_assets.rb, line 74 def previous_revision @previous_revision ||= config.previous_revision end
reuse_assets?()
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Note on reusing assets when assets may fail silently: It’s difficult and error prone to reuse assets that may have failed silently in the previous deploy. If the assets are unchanged during this deploy, but failed last deploy, we would incorrectly reuse silentely failed assets. Only reusing when assets are enabled ensures that existing assets were successful.
# File lib/engineyard-serverside/rails_assets.rb, line 88 def reuse_assets? asset_strategy.reusable? && previous_revision && active_revision && runner.unchanged_diff_between_revisions?(previous_revision, active_revision, asset_dependencies) end
run_precompile_assets_task()
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# File lib/engineyard-serverside/rails_assets.rb, line 53 def run_precompile_assets_task asset_strategy.prepare do cd = "cd #{paths.active_release}" task = "PATH=#{paths.binstubs}:$PATH #{framework_envs} #{precompile_assets_command}" # This is a hack right now, but I haven't iterated over it enough for a good solution yet. if config.experimental_sync_assets? shell.status "Compiling assets once on localhost (experimental_sync_assets: true)" compilation_result = shell.logged_system("sh -l -c '#{cd} && #{task}'") raise "Assets compilation error" unless compilation_result.success? shell.status "Syncing assets to other remote servers (experimental_sync_assets: true)" runner.servers.remote.run_for_each do |server| server.sync_directory_command(paths.public_assets) end else runner.run "#{cd} && #{task}" end end end