feat: adds prettierd

lua/guard-collection/formatter.lua

@@ -149,6 +149,32 @@ M.prettier = {
   stdin = true,
 }
 
+M.prettierd = {
+  fn = function(buf, range)
+    if vim.fn.has('nvim-0.10') ~= 1 then
+      vim.notify('[guard-collection]: prettierd uses vim.system introduced in nvim 0.10', 4)
+      return
+    end
+    local srow = range and range['start'][1] or 0
+    local erow = range and range['end'][1] or -1
+    local handle = vim.system(
+      { 'prettierd', vim.api.nvim_buf_get_name(buf) },
+      {
+        stdin = true,
+      },
+      vim.schedule_wrap(function(result)
+        if result.code ~= 0 then
+          return
+        end
+        vim.api.nvim_buf_set_lines(buf, srow, erow, false, vim.split(result.stdout, '\r?\n'))
+        vim.cmd('silent! noautocmd write!')
+      end)
+    )
+    handle:write(table.concat(vim.api.nvim_buf_get_lines(buf, srow, erow, false), '\n'))
+    handle:write(nil)
+  end,
+}
+
 M.rubocop = {
   cmd = 'bundle',
   args = { 'exec', 'rubocop', '-A', '-f', 'quiet', '--stderr', '--stdin' },

test/formatter/helper.lua

@@ -3,7 +3,7 @@ local api = vim.api
 
 function M.test_with(ft, input)
   local cmd = require('guard.filetype')(ft).formatter[1].cmd
-  assert(vim.fn.executable(cmd) == 1)
+  assert(not cmd or vim.fn.executable(cmd) == 1)
   local bufnr = api.nvim_create_buf(true, false)
   vim.bo[bufnr].filetype = ft
   api.nvim_set_current_buf(bufnr)

test/formatter/prettierd_spec.lua

@@ -0,0 +1,19 @@
+describe('prettierd', function()
+  it('can format', function()
+    local ft = require('guard.filetype')
+    ft('javascript'):fmt('prettierd')
+    require('guard').setup()
+
+    local formatted = require('test.formatter.helper').test_with('javascript', {
+      [[            const randomNumber = Math.floor(]],
+      [[      Math.random() *           10]],
+      [[      ) + 1]],
+      [[alert(randomNumber)]],
+    })
+    assert.are.same({
+      [[const randomNumber = Math.floor(Math.random() * 10) + 1;]],
+      [[alert(randomNumber);]],
+      [[]],
+    }, formatted)
+  end)
+end)