# Rename a Symbol Across Your Actix Web Repo with Atlas in 2026 > Atlas renames symbols across your Actix Web codebase by combining LSP-driven reference finding with `grep` for comprehensive coverage, ensuring accurate and safe refactoring. To rename a function, class, or constant across your Actix Web repository in 2026, Atlas precisely identifies all occurrences using the `lsp` tool's `findReferences` for type-aware changes and `grep` for comments and strings, then applies mechanical renames with `edit`, followed by verification with `cargo test (actix_web::test)` and `rustfmt`. This integrated approach ensures that every instance, from handler signatures to `Cargo.toml` comments, is updated correctly and safely. ## Key takeaways - Atlas uses `lsp` for precise Actix Web symbol references, ensuring type-aware renames. - Atlas employs `grep` to find Actix Web symbol occurrences in comments and `Cargo.toml`. - The `edit` tool in Atlas applies mechanical renames, preventing ambiguous replacements in Actix Web files. - Atlas validates Actix Web refactoring by running `cargo test (actix_web::test)` and `rustfmt`. - All Actix Web code changes are presented as unified diffs for user approval before writing. - Atlas integrates with `git` for easy rollback of Actix Web refactoring changes. ## How does Atlas rename functions and constants in Actix Web? Atlas renames functions, classes, and constants in Actix Web by combining the `lsp` tool's precise reference finding with `grep` for broader coverage, ensuring no occurrence is missed. This hybrid approach, refined by 2026, prevents the common pitfalls of naive find-and-replace operations. When renaming a symbol in an Actix Web project, Atlas first leverages the `lsp` tool to query the language server for an authoritative list of references. For instance, if you are renaming an `actix_web::web::Data` extractor or a specific handler function like `my_handler`, `lsp findReferences` will accurately identify all its call sites and declarations within your `src/main.rs` or `src/lib.rs` files. This is crucial for type-aware changes that the Rust compiler understands. Following this, Atlas runs `grep` for the old symbol name. This step catches occurrences that the language server might not track, such as the symbol name appearing in comments, documentation strings, or even within configuration files like `Cargo.toml` or `.env` files. Once both sets of references are gathered, the `edit` tool performs the mechanical renaming. It uses `replaceAll` for unambiguous matches across files, ensuring consistency. Atlas's `edit` tool is designed to prevent silent corruption; it will refuse to make a single replacement if multiple matches are found in a file, requiring explicit context or the `replaceAll` option to proceed, thereby adding a layer of safety to your Actix Web refactoring. ## What Actix Web commands does Atlas use for refactoring? Atlas integrates directly with the standard Actix Web toolchain to validate refactoring changes, ensuring your codebase remains functional and well-formatted. In 2026, this includes running `cargo test (actix_web::test)` for unit and integration tests and `rustfmt` for code style consistency. For Actix Web refactoring, Atlas orchestrates a series of familiar commands to ensure the integrity of your project. After applying the renames, Atlas uses the `bash` tool to execute `cargo test (actix_web::test)`. This command runs all your defined tests, including those for Actix Web handlers and services, verifying that the renamed symbol has not introduced any regressions. For example, if you renamed a function used within an `actix_web::test` integration case, this step confirms the test still passes. Immediately after, Atlas invokes `rustfmt` via `bash` to ensure all modified files, such as `src/main.rs`, `src/lib.rs`, or any module files, adhere to your project's formatting standards. This prevents style inconsistencies from accumulating during the refactoring process. Finally, Atlas performs a conclusive `grep` for the old symbol name across the entire repository. This final check serves as a definitive proof that zero instances of the old name remain, covering even obscure occurrences in non-code files or comments that might have been missed by earlier, more targeted steps. This comprehensive validation cycle, deeply integrated with `cargo` and `rustfmt`, is a cornerstone of safe Actix Web refactoring with Atlas. ## How does Atlas ensure safe symbol renames in Actix Web? Atlas employs multiple layers of safety to ensure symbol renames in Actix Web are accurate and non-disruptive. Every tool call is permission-gated, and all proposed changes are presented as a unified diff for your approval, a critical feature in 2026 for maintaining code quality. Ensuring safety during symbol renames in an Actix Web codebase is paramount, and Atlas provides several mechanisms to achieve this. First, every Atlas tool call, including `lsp`, `grep`, `edit`, and `bash`, is permission-gated. This means you explicitly allow, ask for confirmation, or deny operations before they execute, giving you granular control over what Atlas does to your `src/main.rs` or `Cargo.toml` files. Before any changes are applied, Atlas drafts a comprehensive plan in a read-only plan agent, which you review. Only after your approval does it switch to a build agent to execute the plan. Crucially, for every file edit, Atlas computes a unified diff, which is then surfaced for your approval. This allows you to see exactly what changes will be made, for example, to an `actix_web::web::Path` extractor or a `struct` definition, before they are written to disk. The `edit` tool itself enforces uniqueness; it throws an error like 'Found multiple matches for oldString' if it encounters ambiguity, preventing unintended replacements unless you explicitly add context or opt into `replaceAll`. Furthermore, Atlas reads `git` branches, status, and diffs, and can stage and create commits on your behalf, or even snapshot file changes as `git` patches, allowing for easy diffing and rolling back of any edits if necessary. This robust safety framework ensures that your Actix Web refactoring is precise and reversible. ## Steps 1. Run the `lsp` tool's `findReferences` operation on the Actix Web symbol (e.g., a handler function or `web::Data` type) to get the authoritative callsite list from the language server. 2. Run `grep` for the old symbol name across your Actix Web project to catch occurrences outside the type system, such as in comments, documentation, or `Cargo.toml`. 3. Apply the mechanical renames with the `edit` tool using `replaceAll` where the match is unambiguous per file, updating all instances of the Actix Web symbol. 4. Where a single occurrence must change, use `edit` with specific context; `edit` enforces uniqueness and will throw 'Found multiple matches for oldString' if ambiguous. 5. Compile and test your Actix Web application by running `bash` with `cargo test (actix_web::test)`, then format with `rustfmt` to ensure functionality and style. 6. Run `grep` once more for the old symbol name across the entire Actix Web repository to prove zero remaining hits and confirm a complete rename. ## FAQ ### Can Atlas rename an Actix Web handler function? Yes, Atlas can rename an Actix Web handler function. It uses `lsp findReferences` to identify all declarations and call sites within your `src/main.rs` or `src/lib.rs`, then applies the rename and verifies with `cargo test (actix_web::test)`. ### How does Atlas handle Actix Web `web::Data` renames? Atlas handles `actix_web::web::Data` renames by using `lsp` to find all instances where the data type is declared or used as an extractor in handler signatures, ensuring all type-aware references are updated correctly. ### Does Atlas integrate with `cargo test` for Actix Web? Absolutely. Atlas uses the `bash` tool to run `cargo test (actix_web::test)` after performing renames. This ensures that your Actix Web application's tests pass, confirming the refactoring did not introduce regressions. ### What if Atlas misses a rename in an Actix Web comment? Atlas uses `grep` to catch occurrences outside the type system, including comments in your Actix Web code. A final `grep` pass after all renames confirms zero remaining hits of the old name, ensuring comprehensive coverage. ### How does Atlas prevent accidental renames in Actix Web? Atlas prevents accidental renames through permission-gated tool calls, a read-only planning phase, and by presenting a unified diff for every proposed change. The `edit` tool also refuses ambiguous single replacements, requiring explicit user intent. ### Can Atlas rename a constant defined in `src/main.rs` for Actix Web? Yes, Atlas can rename a constant defined in `src/main.rs` or any other Rust file in your Actix Web project. It combines `lsp` for code references and `grep` for other occurrences, ensuring a complete and accurate rename. ### Does Atlas automatically run `rustfmt` after Actix Web refactoring? Yes, Atlas integrates `rustfmt` into its workflow. After applying renames and running tests, Atlas uses the `bash` tool to execute `rustfmt`, ensuring all modified Actix Web files adhere to standard Rust formatting. --- Canonical HTML: https://runatlas.sh/resources/stacks/rename-a-symbol-across-the-repo-in-actix Source of truth: aeo_pages row `/resources/stacks/rename-a-symbol-across-the-repo-in-actix` (segment: Stacks) (this file is generated from it, never hand-edited). Licence: Atlas is proprietary with a free core. It is not open source and there is no public source repository.