Factor out into NormalizeLinefeeds; add tests

pkg/gui/view_helpers.go

@@ -7,6 +7,7 @@ import (
 	"time"
 
 	"github.com/jesseduffield/gocui"
+	"github.com/jesseduffield/lazygit/pkg/utils"
 	"github.com/spkg/bom"
 )
 
@@ -218,8 +219,7 @@ func (gui *Gui) renderString(g *gocui.Gui, viewName, s string) error {
 			return nil
 		}
 		v.Clear()
-		output := string(bom.Clean([]byte(s)))
-		output = strings.Replace(output, "\r", "\r\n", -1)
+		output := utils.NormalizeLinefeeds(string(bom.Clean([]byte(s))))
 		fmt.Fprint(v, output)
 		v.Wrap = true
 		return nil

pkg/utils/utils.go

@@ -63,3 +63,9 @@ func TrimTrailingNewline(str string) string {
 	}
 	return str
 }
+
+func NormalizeLinefeeds(str string) string {
+	str = strings.Replace(str, "\r\n", "\n", -1)
+	str = strings.Replace(str, "\r", "\n", -1)
+	return str
+}

pkg/utils/utils_test.go

@@ -0,0 +1,34 @@
+package utils
+
+import "testing"
+
+var testCases = []struct {
+	Input	 []byte
+	Expected []byte
+}{
+	{
+		// \r\n
+		Input: []byte{97, 115, 100, 102, 13, 10},
+		Expected: []byte{97, 115, 100, 102, 10},
+	},
+	{
+		// \r
+		Input: []byte{97, 115, 100, 102, 13},
+		Expected: []byte{97, 115, 100, 102, 10},
+	},
+	{
+		// \n
+		Input: []byte{97, 115, 100, 102, 10},
+		Expected: []byte{97, 115, 100, 102, 10},
+	},
+
+}
+
+func TestNormalizeLinefeeds(t *testing.T) {
+
+	for _, tc := range testCases {
+		if NormalizeLinefeeds(string(tc.Input)) != string(tc.Expected) {
+			t.Error("Error")
+		}
+	}
+}

test/repos/bom.sh

@@ -3,6 +3,18 @@ set -ex; rm -rf repo; mkdir repo; cd repo
 
 git init
 
+cat <<EOT >> windowslf.txt
+asdf
+asdf
+EOT
+
+unix2dos windowslf.txt
+
+cat <<EOT >> linuxlf.txt
+asdf
+asdf
+EOT
+
 cat <<EOT >> bomtest.txt
 A,B,C,D,E
 F,G,H,I,J