Rubocop

RuboCop is a Ruby static code analyzer a, rubocop. Out of the box it will enforce many of the guidelines outlined in rubocop community Ruby Style Guide.

A RuboCop extension focused on enforcing Rails best practices and coding conventions. You need to tell RuboCop to load the Rails extension. There are three ways to do this:. Now you can run rubocop and it will automatically load the RuboCop Rails cops together with the standard cops. Note: --rails option is required while rubocop command supports --rails option. If you are using Rails 6. If you have problems you can replace it with rubocop -a instead.

Rubocop

A Ruby static code analyzer and formatter, based on the community Ruby style guide. RuboCop is a Ruby static code analyzer a. Out of the box it will enforce many of the guidelines outlined in the community Ruby Style Guide. Apart from reporting the problems discovered in your code, RuboCop can also automatically fix many of them for you. RuboCop is extremely flexible and most aspects of its behavior can be tweaked via various configuration options. Working on RuboCop is often fun, but it also requires a great deal of time and energy. Please consider financially supporting its ongoing development. If you'd rather install RuboCop using bundler , add a line for it in your Gemfile but set the require option to false , as it is a standalone tool :. RuboCop is stable between minor versions, both in terms of API and cop configuration. We aim to ease the maintenance of RuboCop extensions and the upgrades between RuboCop releases. All big changes are reserved for major releases. To prevent an unwanted RuboCop update you might want to use a conservative version lock in your Gemfile :.

All big changes are reserved for major releases. RuboCop's logo was created by Rubocop Petrov.

You can also check the entire project and display all RuboCop warnings in a single report. If necessary, you can enable the Standard wrapper and use it for analyzing project sources. If you want to use Standard to analyze your project, add the 'standard' gem to your Gemfile and install it. To enable or disable RuboCop and Standard inspections, do the following:. If necessary, enable the Use 'standard' gem option to use the Standard wrapper. To see the warning description and fix it, do the following:. You can fix all suggested offenses in a file, or you can apply only specific fixes by a class offense or cop department.

This section of the documentation will teach you how to develop new cops. You can install parser gem and use ruby-parse command line utility to check what the AST looks like in the output. Each expression surrounded by parentheses represents a node in the AST. The first element is the node type and the tail contains the children with all information needed to represent the code. First we need to declare the code that we want to match, and use the ProcessedSource that is a simple wrap to make the parser interpret the code and build the AST:. You can learn more about Node Pattern here. It matches because the root is a send type. Now lets match it deeply using parentheses to define details for sub-nodes. After the cop scaffold is generated, change the node matcher to match with the expression achieved previously:. Get yourself familiar with the AST node hooks that parser and rubocop-ast provide.

Rubocop

Good code has a lot to do with how readable it is. As developers, we more often read code than write it. As my Perl teacher told us many times: the flexibility of Perl's syntax was its best and worst trait at the same time. Ruby's syntax was influenced partly by Perl and is also quite flexible. Whatever language you pick, set some guidelines to avoid overusing a language's flexibility. Style guides for Ruby abound on the web, and it's not difficult to pick a style nowadays. But there is not much point in having copious debates on style and whether a proposed change follows a guide.

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Report repository. Rake task. To prevent an unwanted RuboCop update you might want to use a conservative version lock in your Gemfile :. You signed in with another tab or window. You signed out in another tab or window. Security policy. To see the warning description and fix it, do the following:. Packages 0 No packages published. Latest commit History 2, Commits. RuboCop is extremely flexible and most aspects of its behavior can be tweaked via various configuration options. History 13, Commits. Out of the box it will enforce many of the guidelines outlined in the community Ruby Style Guide.

Besides the --require command line option you can also specify ruby files that should be loaded with the optional require directive in the. Depending on what gems you have in your bundle, RuboCop might suggest extensions that can be added to provide further functionality. For instance, if you are using rspec without the corresponding rubocop-rspec extension, RuboCop will suggest enabling it.

Mar 3, Open Collective Backers. A vast number of ready-made extensions e. Report repository. Support us with a monthly donation and help us continue our activities. RuboCop's logo was created by Dimiter Petrov. If you use RuboCop in your project, you can include one of these badges in your readme to let people know that your code is written following the community Ruby Style Guide. See "Versioning" for information about RuboCop versioning, updates, and the process of introducing new cops. RuboCop configuration file. Note: If doing a sponsorship in the form of donation is problematic for your company from an accounting standpoint, we'd recommend the use of Tidelift, where you can get a support-like subscription instead. Releases RuboCop 1. Select the RuboCop inspection under Ruby Gems and gem management. Latest commit. In this example, we'll show how to use RuboCop as an external tool to correct layout offenses in the currently opened file. You signed in with another tab or window.