dotfiles/.config/nixpkgs/neovim/autocmd.lua

-- apply default terminal settings
vim.api.nvim_create_autocmd('TermOpen', {
  callback = function()
    vim.bo.scrollback = 10000
    vim.opt_local.number = false
    vim.opt_local.relativenumber = false
    vim.b.miniindentscope_disable = true
  end
})

-- preserve window structure when exiting terminal via C-d
vim.api.nvim_create_autocmd('TermClose', {
  callback = function(opts)
    -- don't trigger when force deleting
    if vim.api.nvim_buf_get_option(opts.buf, 'modified') then
      return
    end
    MiniBufremove.delete(opts.buf)
  end,
  -- needed so statusline properly updates
  nested = true,
})

-- automatically enter/leave terminal mode
vim.api.nvim_create_autocmd('TermOpen', { command = 'startinsert' })
vim.api.nvim_create_autocmd({'WinEnter','BufWinEnter'}, {
  pattern = 'term://*',
  command = 'startinsert',
})
vim.api.nvim_create_autocmd('BufLeave', {
  pattern = 'term://*',
  command = 'stopinsert',
})

-- formatting
vim.api.nvim_create_autocmd('BufWritePre', {
  callback = function(opts)
    if vim.bo.filetype == 'diff' then
      return
    end

    if not vim.g.no_lsp_format then
      -- check if can LSP format
      local clients = vim.lsp.get_active_clients({ bufnr = opts.buf })
      for _, client in ipairs(clients) do
        if client.server_capabilities.documentFormattingProvider then
          vim.lsp.buf.format()
          return
        end
      end
    end

    -- otherwise strip trailing whitespace
    vim.cmd('%s/\\s\\+$//e')
  end,
})

-- filetype specific options
vim.api.nvim_create_autocmd('FileType', {
  pattern = 'markdown',
  callback = function()
    vim.bo.textwidth = 80
  end,
})

vim.api.nvim_create_autocmd('FileType', {
  pattern = 'http',
  callback = function(opts)
    vim.keymap.set('n', '<Leader>r', '<Plug>RestNvim', {
      buffer = opts.buf,
    })
  end,
})