Use ignore directive to ignore test files not to be passes to gofumpt (#4936)

### Motivation
To replace the workaround introduced in
https://github.com/jesseduffield/lazygit/pull/4809 with `ignore`
directive to make the code simpler.

### Overview
This is a follow-up PR to
https://github.com/jesseduffield/lazygit/pull/4809.
I have added 4 changes due to updating gofumpt to remove `git ls-files`
workaround.

Please take a look at each commit messages for details.

Makefile

@@ -34,11 +34,9 @@ test: unit-test integration-test-all
 generate:
 	go generate ./...
 
-# If you execute `gofumpt -l -w .`, it will format all Go files in the current directory, including `test/_results/*` files.
-# We pass only Git-tracked Go files to gofumpt because we don't want to format the test results or get errors from it.
 .PHONY: format
 format:
-	git ls-files '*.go' ':!vendor' | xargs gofumpt -l -w
+	gofumpt -l -w .
 
 .PHONY: lint
 lint:

go.mod

@@ -2,6 +2,9 @@ module github.com/jesseduffield/lazygit
 
 go 1.25.0
 
+// This is necessary to ignore test files when executing gofumpt.
+ignore ./test
+
 require (
 	dario.cat/mergo v1.0.1
 	github.com/adrg/xdg v0.4.0

pkg/commands/oscommands/copy.go

@@ -35,16 +35,16 @@ import (
 // destination file exists, all it's contents will be replaced by the contents
 // of the source file. The file mode will be copied from the source and
 // the copied data is synced/flushed to stable storage.
-func CopyFile(src, dst string) (err error) {
+func CopyFile(src, dst string) error {
 	in, err := os.Open(src)
 	if err != nil {
-		return //nolint: nakedret
+		return err
 	}
 	defer in.Close()
 
 	out, err := os.Create(dst)
 	if err != nil {
-		return //nolint: nakedret
+		return err
 	}
 	defer func() {
 		if e := out.Close(); e != nil {
@@ -54,30 +54,30 @@ func CopyFile(src, dst string) (err error) {
 
 	_, err = io.Copy(out, in)
 	if err != nil {
-		return //nolint: nakedret
+		return err
 	}
 
 	err = out.Sync()
 	if err != nil {
-		return //nolint: nakedret
+		return err
 	}
 
 	si, err := os.Stat(src)
 	if err != nil {
-		return //nolint: nakedret
+		return err
 	}
 	err = os.Chmod(dst, si.Mode())
 	if err != nil {
-		return //nolint: nakedret
+		return err
 	}
 
-	return //nolint: nakedret
+	return err
 }
 
 // CopyDir recursively copies a directory tree, attempting to preserve permissions.
 // Source directory must exist. If destination already exists we'll clobber it.
 // Symlinks are ignored and skipped.
-func CopyDir(src string, dst string) (err error) {
+func CopyDir(src string, dst string) error {
 	src = filepath.Clean(src)
 	dst = filepath.Clean(dst)
 
@@ -91,7 +91,7 @@ func CopyDir(src string, dst string) (err error) {
 
 	_, err = os.Stat(dst)
 	if err != nil && !os.IsNotExist(err) {
-		return //nolint: nakedret
+		return err
 	}
 	if err == nil {
 		// it exists so let's remove it
@@ -102,12 +102,12 @@ func CopyDir(src string, dst string) (err error) {
 
 	err = os.MkdirAll(dst, si.Mode())
 	if err != nil {
-		return //nolint: nakedret
+		return err
 	}
 
 	entries, err := os.ReadDir(src)
 	if err != nil {
-		return //nolint: nakedret
+		return err
 	}
 
 	for _, entry := range entries {
@@ -117,13 +117,13 @@ func CopyDir(src string, dst string) (err error) {
 		if entry.IsDir() {
 			err = CopyDir(srcPath, dstPath)
 			if err != nil {
-				return //nolint: nakedret
+				return err
 			}
 		} else {
 			var info os.FileInfo
 			info, err = entry.Info()
 			if err != nil {
-				return //nolint: nakedret
+				return err
 			}
 
 			// Skip symlinks.
@@ -133,10 +133,10 @@ func CopyDir(src string, dst string) (err error) {
 
 			err = CopyFile(srcPath, dstPath)
 			if err != nil {
-				return //nolint: nakedret
+				return err
 			}
 		}
 	}
 
-	return //nolint: nakedret
+	return err
 }

pkg/gui/presentation/branches_test.go

@@ -16,9 +16,10 @@ import (
 	"github.com/xo/terminfo"
 )
 
-func makeAtomic(v int32) (result atomic.Int32) {
+func makeAtomic(v int32) *atomic.Int32 {
+	var result atomic.Int32
 	result.Store(v)
-	return //nolint: nakedret
+	return &result
 }
 
 func Test_getBranchDisplayStrings(t *testing.T) {
@@ -109,7 +110,7 @@ func Test_getBranchDisplayStrings(t *testing.T) {
 			branch: &models.Branch{
 				Name:             "branch_name",
 				Recency:          "1m",
-				BehindBaseBranch: makeAtomic(2),
+				BehindBaseBranch: *makeAtomic(2),
 			},
 			itemOperation:        types.ItemOperationNone,
 			fullDescription:      false,
@@ -126,7 +127,7 @@ func Test_getBranchDisplayStrings(t *testing.T) {
 				UpstreamRemote:   "origin",
 				AheadForPull:     "0",
 				BehindForPull:    "0",
-				BehindBaseBranch: makeAtomic(2),
+				BehindBaseBranch: *makeAtomic(2),
 			},
 			itemOperation:        types.ItemOperationNone,
 			fullDescription:      false,
@@ -143,7 +144,7 @@ func Test_getBranchDisplayStrings(t *testing.T) {
 				UpstreamRemote:   "origin",
 				AheadForPull:     "3",
 				BehindForPull:    "5",
-				BehindBaseBranch: makeAtomic(2),
+				BehindBaseBranch: *makeAtomic(2),
 			},
 			itemOperation:        types.ItemOperationNone,
 			fullDescription:      false,
@@ -247,7 +248,7 @@ func Test_getBranchDisplayStrings(t *testing.T) {
 				UpstreamRemote:   "origin",
 				AheadForPull:     "3",
 				BehindForPull:    "5",
-				BehindBaseBranch: makeAtomic(4),
+				BehindBaseBranch: *makeAtomic(4),
 			},
 			itemOperation:        types.ItemOperationNone,
 			fullDescription:      false,