Clean up linux logic to have better default logic

pkg/browser/browser.go

@@ -30,11 +30,7 @@ func ForOS(goos, url string) *exec.Cmd {
 		r := strings.NewReplacer("&", "^&")
 		args = append(args, "/c", "start", r.Replace(url))
 	default:
-		if findExe("wslview") {
-			exe = "wslview"
-		} else {
-			exe = "xdg-open"
-		}
+		exe = linuxExe()
 		args = append(args, url)
 	}
 
@@ -56,7 +52,15 @@ func FromLauncher(launcher, url string) (*exec.Cmd, error) {
 	return cmd, nil
 }
 
-var findExe = func(command string) bool {
+var linuxExe = func() string {
+	exe := "xdg-open"
+	if !findExe("xdg-open") && findExe("wslview") {
+		exe = "wslview"
+	}
+	return exe
+}
+
+func findExe(command string) bool {
 	_, err := exec.LookPath(command)
 	return err == nil
 }

pkg/browser/browser_test.go

@@ -11,10 +11,10 @@ func TestForOS(t *testing.T) {
 		url  string
 	}
 	tests := []struct {
-		name    string
-		args    args
-		findExe bool
-		want    []string
+		name string
+		args args
+		exe  string
+		want []string
 	}{
 		{
 			name: "macOS",
@@ -30,8 +30,8 @@ func TestForOS(t *testing.T) {
 				goos: "linux",
 				url:  "https://example.com/path?a=1&b=2",
 			},
-			findExe: false, // wslview does not exist on standard Linux
-			want:    []string{"xdg-open", "https://example.com/path?a=1&b=2"},
+			exe:  "xdg-open",
+			want: []string{"xdg-open", "https://example.com/path?a=1&b=2"},
 		},
 		{
 			name: "WSL",
@@ -39,8 +39,8 @@ func TestForOS(t *testing.T) {
 				goos: "linux",
 				url:  "https://example.com/path?a=1&b=2",
 			},
-			findExe: true, // wslview exists on WSL
-			want:    []string{"wslview", "https://example.com/path?a=1&b=2"},
+			exe:  "wslview",
+			want: []string{"wslview", "https://example.com/path?a=1&b=2"},
 		},
 		{
 			name: "Windows",
@@ -53,7 +53,7 @@ func TestForOS(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			findExe = func(string) bool { return tt.findExe }
+			linuxExe = func() string { return tt.exe }
 			if cmd := ForOS(tt.args.goos, tt.args.url); !reflect.DeepEqual(cmd.Args, tt.want) {
 				t.Errorf("ForOS() = %v, want %v", cmd.Args, tt.want)
 			}