rustfmt vs Spotless
rustfmt
rust-lang.github.ioSpotless
github.comSide by side
| Figure | rustfmt | Spotless |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| Plans published | 1 | 2 |
| Spec score · Code Formatting Tools | 8.0 (#10) | 7.3 (#28) |
| Editor integrations | The README lists integrations or usage instructions for Vim, Emacs, Sublime Text 3, Atom, Visual Studio Code, and IntelliJ or CLion. | The README links Spotless integrations for VS Code and IntelliJ. |
| License | rustfmt is distributed under both the MIT License and Apache License 2.0. | The GitHub repository identifies its license as Apache-2.0. |
| Purpose | rustfmt formats Rust code according to style guidelines. | Spotless formats source code and can check files for formatting violations or apply fixes. |
| Security contact | The Rust Security Response Working Group handles vulnerability reports and security issues for rust-lang organization repositories. | The repository asks users to email [email protected] for security disclosures. |
| Support | The README points users to `rustfmt --help` and `cargo fmt --help` for command usage and arguments. | DiffPlug directs questions to its forum and lists a technical support contact on its About page. |
Plans
In their own words
rustfmt
rustfmt formats Rust code according to style guidelines. It can format files directly or read code from standard input and write formatted output to standard output. With Cargo, `cargo fmt` formats binary and library targets in a crate and works with workspaces. A `rustfmt.toml` or `.rustfmt.toml` file can hold configuration, including stable and nightly-only options. For automated checks, `--check` returns code 0 when no formatting changes are needed and code 1 when changes would be made; it can be used in CI to fail a build on formatting differences. The README lists editor use with Vim, Emacs, Sublime Text 3, Atom, Visual Studio Code, IntelliJ, and CLion. Rustfmt is available on Windows, macOS, and Linux, and is distributed under the MIT License and Apache License 2.0. It does not attempt to format comments, and listed limitations also involve macros, unparsable code, fragments, and non-ASCII Unicode. Unstable settings require opt-in on nightly, and the README says the latest version requires the nightly toolchain.
Spotless
Spotless formats source code and can check files for formatting violations or apply fixes. It supports languages and formats including Java, Kotlin, JavaScript, Python, SQL, YAML, and Markdown, with formatter options such as Google Java Format, ktlint, Prettier, ESLint, Black, and ScalaFmt. The project integrates with Gradle and Maven and links to an external SBT integration. Its README links to VS Code and IntelliJ integrations. Spotless lists automatic idempotency and encoding safeguards for Gradle, Maven, and SBT. Git-based features include ratcheting from a Git reference for Gradle and Maven, and Git-defined line endings for all three build tools. Some capabilities, including ratcheting and fast incremental formatting, are unavailable in SBT. The repository identifies the license as Apache-2.0. Spotless is available for Linux, macOS, and Windows. DiffPlug directs questions to its forum and lists a technical support contact; security disclosures can be sent to [email protected]. Its plan listing includes a free plan at free, billed free forever with no registration required, and also lists a free trial.