e7d0a978ba
This allows us to reuse any CSS we have, unify their look and unify their look with the regular page design. This works by instantiating ActionView and rendering templates in a rake task. Inspired by the errgent gem.
59 lines
1.7 KiB
Ruby
59 lines
1.7 KiB
Ruby
# Inspired by https://github.com/route/errgent/blob/master/lib/errgent/renderer.rb
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class ErrorPageRenderer
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def initialize options={}
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@codes = options.fetch :codes, [404, 500]
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@output = options.fetch :output, "public/%s.html"
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@vars = options.fetch :vars, {}
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@template = options.fetch :template, "errors/error_%s"
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@layout = options.fetch :layout, "layouts/error_page"
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end
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def render
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@codes.each do |code|
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view = build_action_view
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view.assign @vars.merge(code: code)
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path = Rails.root.join(@output % code)
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File.write path, view.render(template: @template % code, layout: @layout)
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end
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end
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def helpers(&block)
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@helpers = block
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end
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private
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def build_action_view
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paths = ::ActionController::Base.view_paths
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::ActionView::Base.new(paths).tap do |view|
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view.class_eval do
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include Rails.application.helpers
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include Rails.application.routes.url_helpers
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end
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view.assets_manifest = build_manifest(Rails.application)
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view.class_eval(&@helpers) if @helpers
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end
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end
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# Internal API from the sprocket-rails railtie, if somebody finds a way to
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# call it, please replace it. Might need to be updated on sprocket-rails
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# updates.
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def build_manifest(app)
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config = app.config
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path = File.join(config.paths['public'].first, config.assets.prefix)
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Sprockets::Manifest.new(app.assets, path, config.assets.manifest)
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end
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end
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namespace :assets do
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desc "Generate error pages"
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task :generate_error_pages do
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renderer = ErrorPageRenderer.new codes: [404, 422, 500]
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renderer.render
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end
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# Augment precompile with error page generation
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task :precompile do
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Rake::Task['assets:generate_error_pages'].invoke
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end
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end
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