WIP

A format runner for neovim, written in lua.

Using your package manager of choice

" vim-plug
Plug 'mhartington/formatter.nvim'

" dein.nvim
call dein#add('mhartington/formatter.nvim')


" configure the plugin

lua require('formatter').setup(...)
" Provided by setup function
nnoremap <silent> <leader>f :Format<CR>

By default there are no tools configured. This may change.

To config a tool, you can create a table for the filetype and tool you want to use

require('formatter').setup({
  logging = false,
  filetype = {
    javascript = {
        -- prettier
       function()
          return {
            exe = "prettier",
            args = {"--stdin-filepath", vim.api.nvim_buf_get_name(0), '--single-quote'},
            stdin = true
          }
        end
    },
    rust = {
      -- Rustfmt
      function()
        return {
          exe = "rustfmt",
          args = {"--emit=stdout"},
          stdin = true
        }
      end
    },
    lua = {
        -- luafmt
        function()
          return {
            exe = "luafmt",
            args = {"--indent-count", 2, "--stdin"},
            stdin = true
          }
        end
      }
  }
})

Each format tool config is a function that returns a table. Since each entry is a function, the tables for each file type act as an ordered list (or array). This mean things will run in the order you list them, keep this in mind.

Each formatter should return a table that consist of:

• exe: the program you wish to run
• args: a table of args to pass
• stdin: If it should use stdin or not.
• tempfile_dir: directory for temp file when not using stdin (optional)
• tempfile_prefix: prefix for temp file when not using stdin (optional)
• tempfile_postfix: postfix for temp file when not using stdin (optional)

To enable format on save, you can create a autocmd to trigger the formater using FormatWrite, which will format and write to the current saved file.

vim.api.nvim_exec([[
augroup FormatAutogroup
  autocmd!
  autocmd BufWritePost *.js,*.rs,*.lua FormatWrite
augroup END
]], true)