Programmatic Refactoring of Zed

This tool is part of an ongoing effort to simplify context types in the GPUI framework and the Zed app that uses it. It's designed to automatically refactor Rust code, replacing WindowContext and ViewContext with explicit Window parameters along with AppContext. So far, the tool performs the following transformations:

Function Signatures

• Replaces cx: &mut WindowContext with window: &mut Window, cx: &mut AppContext
• Updates function types using WindowContext to use &mut Window and &mut AppContext

Method Calls

• Replaces cx.method() calls with either:
  • window.method() for Window-specific methods
  • cx.method() for AppContext-specific methods
• Adds cx as an additional argument for methods that require it

Function Calls

• Updates calls to functions that previously took a WindowContext parameter
• Replaces the single WindowContext argument with both window and cx

Imports

• Updates import statements to include both Window and AppContext where WindowContext was previously imported

Key Features

• Uses tree-sitter for accurate parsing and transformation of Rust code
• Supports both regular functions and methods within impl blocks
• Handles different types of function calls (direct, method, and scoped)
• Provides a dry-run option to preview changes without modifying files
• Processes entire directories of Rust files recursively

Usage

cargo run -- <path_to_rust_files> [--dry-run]

This tool aims to simplify the process of updating codebases to use the new Window and AppContext pattern, reducing manual refactoring effort and potential errors. As a work in progress, it's specifically tailored for the GPUI framework and Zed, focusing on a big migration to simplify the UI framework.