guard.nvim

Async formatting and linting utility for neovim.

Features

• Blazingly fast
• Async using coroutine and luv spawn
• Builtin support for popular formatters and linters
• Light-weight

Usage

Use any plugin manager you like. Guard is configured in format like this:

ft('c'):fmt('tool-1')
       :append('tool-2')
       :lint('lint-tool-1')
       :append('lint-tool-2')

if the tool is not supported, you will have to pass in a table instead of a string, see here for some examples, more info below.

local ft = require('guard.filetype')

-- use clang-format and clang-tidy for c files
ft('c'):fmt('clang-format')
       :lint('clang-tidy')

-- use stylua to format lua files and no linter
ft('lua'):fmt('stylua')

-- use lsp to format first then use golines to format
ft('go'):fmt('lsp')
        :append('golines')
        :lint('golangci')

-- call setup LAST
require('guard').setup({
    -- the only option for the setup function
    fmt_on_save = true,
})

Use GuardFmt to manually call format, use GuardDisable to diable auto format. and you can create a keymap like

vim.keymap.set({'n','v'}, '<cmd>GuardFmt<CR>')

Builtin tools

Formatter

• lsp use vim.lsp.buf.format
• clang-format
• prettier
• rustfmt
• stylua
• golines
• black
• rubocop

Table format for custom tool:

{
    cmd              --string tool command
    args             --table command arugments
    fname            --string insert filename to args tail
    stdin            --boolean pass buffer contents into stdin
    timeout          --integer
    ignore_pattern   --table ignore run format when pattern match
    ignore_error     --when has lsp error ignore format

    --special
    fn       --function if fn is set other field will not take effect
}

Linter

• clang-tidy
• Pylint
• rubocop

Trobuleshooting

if guard does not auto format on save, run checkhealth first.

License MIT