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',
})

-- rename
vim.api.nvim_create_autocmd('User', {
  pattern = 'MiniFilesActionRename',
  callback = function(opts)
    local params = {
      files = {{
        oldUri = vim.uri_from_fname(opts.data.from),
        newUri = vim.uri_from_fname(opts.data.to),
      }}
    }
    local bufnr = vim.fn.bufadd(opts.data.to)

    local clients = vim.lsp.get_clients({ bufnr = bufnr })
    for _, client in ipairs(clients) do
      if client:supports_method('workspace/willRenameFiles') then
        local resp = client:request_sync('workspace/willRenameFiles', params, 5000, bufnr)
        if resp and resp.result ~= nil then
          vim.lsp.util.apply_workspace_edit(resp.result, client.offset_encoding)
        end
      end
    end

    for _, client in ipairs(clients) do
      if client:supports_method('workspace/didRenameFiles') then
        client:notify('workspace/didRenameFiles', params)
      end
    end
  end,
  nested = true,
})

-- 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_clients({ bufnr = opts.buf, method = 'textDocument/formatting' })
      if #clients > 0 then
        vim.lsp.buf.format({ bufnr = opts.buf })
      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,
})