RubyMine 2020.3

Code Editor

• Split the editor, drag and drop tabs - You can now split the editor when opening your file by pressing Shift+Enter. This works for files in the Project view and in the Search Everywhere popup. You can also drag and drop file tabs to split the editor vertically or horizontally, and move tabs between the splits.
• Pinned tabs improvements - Pinned tabs now stick to the left side of the tab bar. You can also keep all your pinned tabs in one row. There’s also a new icon to indicate when a tab is pinned. Clicking on it unpins the file.
• Improved Markdown editing and preview - With the Markdown tool, you can now format your Markdown files using Ctrl+Alt+L. The Auto-Scroll Preview button in the top-right corner of the editor allows you to synchronize scrolling of the preview pane and the editor. Jetbrains has also added support for Mermaid.js.

User experience

• New Welcome screen - RubyMine 2020.3 comes with a redesigned Welcome screen. You can now access and arrange your projects in the Projects tab, set up the IDE interface in the Customize tab, manage plugins in the Plugins tab, and access learning resources in the Learn RubyMine tab.
• IDE theme synced with OS settings - RubyMine can now synchronize its theme with your OS. Select the Sync with OS option and click the gear to select your preferred theme. Your IDE will automatically switch to the light or dark theme, depending on your OS preferences.
• Reader mode - This mode renders read-only files and files from external libraries into a more readable format.
• LightEdit improvements - Added the -e (--edit) option to open files in LightEdit mode from the command line.
• Quick-fixes for typos - RubyMine 2020.3 makes it easier to keep your text free from typos. Suggested fixes are now shown directly in the Alt+Enter menu, just like quick-fixes for code. Jetbrains has also added a new Transpose action that flips the current character with the one that follows it.
• Search Everywhere updates - The Search Everywhere dialog now has a new Git tab. You can now look up branches, commit hashes and messages, and tags. You can also perform simple mathematical calculations right in the search field.
• Preview files - To quickly find files you are looking for, you can now use file preview. To preview a file, select it in the Project view and press Space. Alternatively, you can set up the IDE to immediately show a preview when a file is selected. To enable this feature, click the gear icon in the Project view and select both Enable Preview Tab and Open Files with Single Click.

Ruby

• Support for the upcoming Ruby 3.0 release - RubyMine 2020.3 features basic support for the new syntax that comes with Ruby 3.0 preview. You can already try out most of the new language features, for example, endless method definitions. Please note that support for Ruby 3.0 is still a work in progress. Features like code assistance and RBS support will be properly implemented after the Ruby 3.0 release version is out.
• Terminal uses the Ruby version specified for the project - When you work on multiple projects, they might be using different versions of Ruby. RubyMine’s built-in Terminal emulator now uses the version of Ruby that is selected for the current project. It also specifies which exact version is being used when you launch a terminal instance.
• Support for interpreters with custom environment - RubyMine now allows you to configure custom environments for your projects using tools like shadowenv or direnv. This comes in handy when you have multiple projects that each need different environment variables. Any Ruby commands run with RubyMine will be executed using the environment variables provided.
• Pry console support - You can now use Pry instead of IRB in RubyMine.

Rails

• Improved support for Rails routing - This release has made working with routes.rb effortless. Use Ctrl+Alt+Home to quickly navigate between a route in routes.rb and its related models, views, and controllers. Ctrl+click on a method in routes.rb to jump to the related method in a controller. This release has also improved completion for routes.rb. For example, it now works for all Match and HTTP helpers (such as get, post, put, etc.), resources, namespace, and scope.
• Support for structure.sql - RubyMine 2020.3 adds structure.sql support for projects that use it instead of a schema.rb file. Now you can use autocompletion for models that rely on structure.sql. You can also navigate between your Rails entities and structure.sql using Ctrl+Alt+Home.

Version control

• Git staging support - RubyMine now supports staging changes directly from the IDE. You can stage and unstage files by clicking the + and - icons in the Commit view. You can also stage changes from the gutter or in the Diff view.
• Rearranged VCS menu - Renamed and rearranged the version control actions in the main menu to make the most common VCS operations easier to access.

Run Configurations

• Store and share run/debug configuration templates - You can now share run configurations with your teammates using a version control system. Run configurations can now be saved as XML files and added to a VCS.

Tests

• Сode coverage for branches and subprocesses - In projects that use simplecov for code coverage analysis, RubyMine now shows information about the coverage of branches and subprocesses.
• FactoryBot improvements - You can now navigate between a factory and its related entities with Ctrl+Alt+Home. Code completion now suggests model attributes for Factory Bot strategies like build and create.

Debugger

• Interactive hints - Debug mode now has interactive inline hints for variables. You can click these hints to change the value of a variable field.
• Inline watches - RubyMine 2020.3 adds a new type of watch expression. These expressions will be associated with a particular context and shown right inside the editor. You can add them using the inline hint: open a hint, and click Add Inline Watch. You can manage your inline watches in a new Inline Watches node in the Variables tab of the Debug tool window.

Database tools

• Couchbase support - RubyMine 2020.3 supports one more database: Couchbase. Please note that this includes support for the Couchbase Query service, not the Couchbase Analytics service.
• SQL for MongoDB - You can now use SQL to query MongoDB databases.

Code With Me

• Support for remote collaborative development and pair programming - RubyMine 2020.3 supports Code With Me (EAP), the new tool from JetBrains for remote collaborative development and pair programming. With it, you can share the project you currently have open in your IDE with others and work on it together in real time. Please note that Code With Me is still in active development, and has known issues.

Other improvements

• Updated several of RubyMine’s code style settings to match the default style of RuboCop.
• When you open a file from the Project view, the focus is automatically placed on the Editor to allow you to start working with your code right away.
• The two most popular buttons, Commit and Commit and Push, are now displayed on the Commit screen.
• Patches are now created in Git format by default, instead of the format of the VCS that is used in the project.
• RubyMine will automatically correct disallowed symbols in branch names.
• You can now see all the actions related to the current branch in its context menu.
• You can now configure a custom template that creates several files simultaneously.
• You can now export an HTTP request to cURL.
• Updated the format of HTTP requests. To convert existing HTTP requests to the new format, select an HTTP request in the Project view, then in the context menu select Convert Legacy REST Client File to New Format.
• Improved Swagger support, including support for Swagger Hub, external references, and various code insight improvements.
• Improved Kubernetes support.