feat: add gofumpt formatter

README.md

@@ -16,6 +16,7 @@
 - [ ] [fish_indent](https://fishshell.com/docs/current/cmds/fish_indent.html)
 - [ ] [fnlfmt](https://git.sr.ht/~technomancy/fnlfmt)
 - [ ] [gofmt](https://pkg.go.dev/cmd/gofmt)
+- [x] [gofumpt](https://pkg.go.dev/mvdan.cc/gofumpt)
 - [ ] [golines](https://pkg.go.dev/github.com/segmentio/golines)
 - [ ] [google-java-format](https://github.com/google/google-java-format)
 - [ ] [isort](https://github.com/PyCQA/isort)

lua/guard-collection/formatter.lua

@@ -59,6 +59,11 @@ M.gofmt = {
   stdin = true,
 }
 
+M.gofumpt = {
+  cmd = 'gofumpt',
+  stdin = true,
+}
+
 M.golines = {
   cmd = 'golines',
   args = { '--max-len=80' },

test/formatter/gofumpt_spec.lua

@@ -0,0 +1,28 @@
+describe('gofumpt', function()
+  it('can format', function()
+    local ft = require('guard.filetype')
+    ft('go'):fmt('gofumpt')
+    require('guard').setup()
+
+    local formatted = require('test.formatter.helper').test_with('go', {
+      [[package         main]],
+      [[]],
+      [[     import   "fmt"     ]],
+      [[]],
+      [[func    main() {]],
+      [[   x:=     1;]],
+      [[          fmt.Println(x);]],
+      [[}]],
+    })
+    assert.are.same({
+      [[package main]],
+      [[]],
+      [[import "fmt"]],
+      [[]],
+      [[func main() {]],
+      [[	x := 1]],
+      [[	fmt.Println(x)]],
+      [[}]],
+    }, formatted)
+  end)
+end)

test/setup.sh

@@ -7,7 +7,7 @@ eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"
 sudo apt-get install -qqq \
     clang-format clang-tidy fish elixir &
 luarocks install luacheck &
-go install github.com/segmentio/golines@latest &
+go install github.com/segmentio/golines@latest mvdan.cc/gofumpt@latest &
 pip -qqq install autopep8 black djhtml flake8 isort pylint yapf codespell ruff &
 npm install -g --silent \
     prettier @fsouza/prettierd sql-formatter shellcheck shfmt &