Extracting Deprecation Warnings From the Rails Source Code - FastRuby.io | Rails Upgrade Service

Learn how to extract deprecation warnings from the Rails source code, for each version of Rails, using the Abstract Syntax Tree (AST) and tree-sitterBefore doing an upgrade, we strongly recommend doing the Roadmap to Upgrade Rails opens a new window, a static analysis of your codebase that outlines the action plan to do the upgrade and provides time and investment estimates. The first step in every Rails upgrade we do is addressing deprecation warnings in the current version. So recently, we set out to extract all deprecation warnings from all versions of Rails starting at Rails 2.3 to help in our static analysis of Rails applications. In order to extract all deprecation warnings from the Rails source code we first needed to understand how deprecation warnings are emitted.