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template.rb
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template.rb
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# Install Webpacker
copy_file "#{__dir__}/config/webpacker.yml", "config/webpacker.yml"
copy_file "#{__dir__}/package.json", "package.json"
say "Copying webpack core config"
directory "#{__dir__}/config/webpack", "config/webpack"
if Dir.exist?(Webpacker.config.source_path)
say "The packs app source directory already exists"
else
say "Creating packs app source directory"
empty_directory "app/javascript"
copy_file "#{__dir__}/application.js", "app/javascript/application.js"
end
apply "#{__dir__}/binstubs.rb"
git_ignore_path = Rails.root.join(".gitignore")
if File.exist?(git_ignore_path)
append_to_file git_ignore_path do
"\n" +
"/public/packs\n" +
"/public/packs-test\n" +
"/node_modules\n" +
"/yarn-error.log\n" +
"yarn-debug.log*\n" +
".yarn-integrity\n"
end
end
if (app_layout_path = Rails.root.join("app/views/layouts/application.html.erb")).exist?
say "Add JavaScript include tag in application layout"
insert_into_file app_layout_path.to_s, %(\n <%= javascript_pack_tag "application" %>), before: /\s*<\/head>/
else
say "Default application.html.erb is missing!", :red
say %( Add <%= javascript_pack_tag "application" %> within the <head> tag in your custom layout.)
end
if (setup_path = Rails.root.join("bin/setup")).exist?
say "Run bin/yarn during bin/setup"
insert_into_file setup_path.to_s, <<-RUBY, after: %( system("bundle check") || system!("bundle install")\n)
# Install JavaScript dependencies
system! "bin/yarn"
RUBY
end
if (asset_config_path = Rails.root.join("config/initializers/assets.rb")).exist?
say "Add node_modules to the asset load path"
append_to_file asset_config_path, <<-RUBY
# Add node_modules folder to the asset load path.
Rails.application.config.assets.paths << Rails.root.join("node_modules")
RUBY
end
if (csp_config_path = Rails.root.join("config/initializers/content_security_policy.rb")).exist?
say "Make note of webpack-dev-server exemption needed to csp"
insert_into_file csp_config_path, <<-RUBY, after: %(# Rails.application.config.content_security_policy do |policy|)
# # If you are using webpack-dev-server then specify webpack-dev-server host
# policy.connect_src :self, :https, "http://localhost:3035", "ws://localhost:3035" if Rails.env.development?
RUBY
end
results = []
Dir.chdir(Rails.root) do
if Webpacker::VERSION.match?(/^[0-9]+\.[0-9]+\.[0-9]+$/)
say "Installing all JavaScript dependencies [#{Webpacker::VERSION}]"
results << run("yarn add @rails/webpacker@#{Webpacker::VERSION}")
else
say "Installing all JavaScript dependencies [from prerelease rails/webpacker]"
results << run("yarn add @rails/webpacker@next")
end
package_json = File.read("#{__dir__}/../../package.json")
webpack_version = package_json.match(/"webpack": "(.*)"/)[1]
webpack_cli_version = package_json.match(/"webpack-cli": "(.*)"/)[1]
# needed for experimental Yarn 2 support and should not harm Yarn 1
say "Installing webpack and webpack-cli as direct dependencies"
results << run("yarn add webpack@#{webpack_version} webpack-cli@#{webpack_cli_version}")
say "Installing dev server for live reloading"
results << run("yarn add --dev webpack-dev-server @webpack-cli/serve")
end
if Rails::VERSION::MAJOR == 5 && Rails::VERSION::MINOR > 1
say "You need to allow webpack-dev-server host as allowed origin for connect-src.", :yellow
say "This can be done in Rails 5.2+ for development environment in the CSP initializer", :yellow
say "config/initializers/content_security_policy.rb with a snippet like this:", :yellow
say "policy.connect_src :self, :https, \"http://localhost:3035\", \"ws://localhost:3035\" if Rails.env.development?", :yellow
end
unless results.all?
say "Webpacker installation failed 😭 See above for details.", :red
exit 1
end