![]() For example, the Rails/UnknownEnv cop ensures that ? is only allowed if foo is a valid environment. RUBYMINE RUBOCOP CODERuboCop is highly configurable and supports static analysis beyond formatting, while Prettier and rufo focus exclusively on code style. RuboCop autocorrect may need to run several times, as one cop’s autocorrection may introduce a violation of a different cop. RUBYMINE RUBOCOP SERIESIn contrast, RuboCop mutates code in place using a series of atomic autocorrections defined by individual cops. They parse an abstract syntax tree for a file and then render it in one pass according to a lightly parametrizable algorithm. Rufo’s and Prettier’s approaches to formatting are more streamlined than RuboCop’s. When we started this project in June 2018, we explored three options: RuboCop, rufo, and the Ruby plugin for Prettier. Method calls with parentheses, return statements to disambiguate author intent, etc. As a fast-growing team of engineers working across languages, we tend to prefer more explicit Ruby code that matches our JavaScript styles. We want something straightforward to implement and maintain, and originally hoped to use something totally off-the-shelf. To be enabled by default in the precommit hook, the formatter must autocorrect extremely reliably and quickly. Minimal disruption to day-to-day engineering workflow.Ideally, the formatter obviates the need for a written style guide beyond explanatory comments in the configuration file. Universal consistency for minor stylistic things.So we began a project to improve backend code style. We’d been using RuboCop, but our configuration wasn’t strict about things like line length and whitespace. Naturally, we wanted a similar setup for Ruby. It’s fast and reliable enough to run on file save and in our precommit hook, so all JavaScript files are automatically formatted before they reach code review. On the frontend, we use Prettier to format our code. rubocop.yml Project goalsįlexport has a Ruby on Rails backend and a JavaScript React frontend. Layout and Metrics sections of Flexport’s. Update: All the new cops are available in 0.68! Here is the relevant section of our RuboCop configuration file: Original on the left formatted with Flexport RuboCop on the right. ![]()
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