stevearc / conform.nvim

conform.nvim Lightweight yet powerful formatter plugin for Neovim • Requirements • Features • Installation • Setup • Formatters • Customizing formatters • Magic strings • Recipes • Debugging • Advanced topics • Options • Formatter options • API • setup(opts) • format(opts, callback) • list_formatters(bufnr) • list_formatters_to_run(bufnr) • list_all_formatters() • get_formatter_info(formatter, bufnr) • FAQ • Acknowledgements Requirements • Neovim 0.10+ (for older versions, use a nvim-0.x branch) Features • **Preserves extmarks and folds** - Most formatters replace the entire buffer, which clobbers extmarks and folds, and can cause the viewport and cursor to jump unexpectedly. Conform calculates minimal diffs and applies them using the built-in LSP format utilities. • **Fixes bad-behaving LSP formatters** - Some LSP servers are lazy and simply replace the entire buffer, leading to the problems mentioned above. Conform hooks into the LSP handler and turns these responses into proper piecewise changes. • **Enables range formatting for all formatters** - Since conform calculates minimal diffs, it can perform range formatting even if the underlying formatter doesn't support it. • **Simple API** - Conform exposes a simple, imperative API modeled after . • **Formats embedded code blocks** - Can format code blocks inside markdown files or similar (see injected language formatting) Installation conform.nvim supports all the usual plugin managers lazy.nvim For a more thorough configuration involving lazy-loading, see Lazy loading with lazy.nvim. Packer Paq vim-plug dein Pathogen Neovim native package Setup At a minimum, you will need to set up some formatters by filetype Then you can use just like you would . For example, to format on save: As a shortcut, conform will optionally set up this format-on-save autocmd for you See conform.format() for more details about the parameters. Conform also provides a formatexpr, same as the LSP client: To view configured and available formatters, as well as to see the log file, run Formatters You can view this list in vim with Expand to see all formatters • air - R formatter and language server. • alejandra - The Uncompromising Nix Code Formatter. • ansible-lint - ansible-lint with --fix. • asmfmt - Go Assembler Formatter • ast-grep - A CLI tool for code structural search, lint and rewriting. 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