Use LookPath to determine if xdg-open exists

pkg/browser/browser.go

@@ -1,7 +1,6 @@
 package browser
 
 import (
-	"bufio"
 	"os"
 	"os/exec"
 	"runtime"
@@ -31,10 +30,10 @@ func ForOS(goos, url string) *exec.Cmd {
 		r := strings.NewReplacer("&", "^&")
 		args = append(args, "/c", "start", r.Replace(url))
 	default:
-		if inWsl() {
-			exe = "wslview"
-		} else {
+		if findExe("xdg-open") {
 			exe = "xdg-open"
+		} else {
+			exe = "wslview"
 		}
 		args = append(args, url)
 	}
@@ -57,20 +56,11 @@ func FromLauncher(launcher, url string) (*exec.Cmd, error) {
 	return cmd, nil
 }
 
-// Determine if gh is running inside of WSL2
-func inWsl() bool {
-	file, err := os.Open("/proc/sys/kernel/osrelease")
+var findExe = func(command string) bool {
+	_, err := exec.LookPath(command)
 	if err != nil {
 		return false
+	} else {
+		return true
 	}
-	defer file.Close()
-
-	scanner := bufio.NewScanner(file)
-	scanner.Scan() // Read single line
-	if err := scanner.Err(); err != nil {
-		return false
-	}
-
-	os := scanner.Text()
-	return strings.Contains(os, "microsoft-WSL2")
 }

pkg/browser/browser_test.go

@@ -11,9 +11,10 @@ func TestForOS(t *testing.T) {
 		url  string
 	}
 	tests := []struct {
-		name string
-		args args
-		want []string
+		name    string
+		args    args
+		findExe bool
+		want    []string
 	}{
 		{
 			name: "macOS",
@@ -29,7 +30,17 @@ func TestForOS(t *testing.T) {
 				goos: "linux",
 				url:  "https://example.com/path?a=1&b=2",
 			},
-			want: []string{"xdg-open", "https://example.com/path?a=1&b=2"},
+			findExe: true,
+			want:    []string{"xdg-open", "https://example.com/path?a=1&b=2"},
+		},
+		{
+			name: "WSL",
+			args: args{
+				goos: "linux",
+				url:  "https://example.com/path?a=1&b=2",
+			},
+			findExe: false,
+			want:    []string{"wslview", "https://example.com/path?a=1&b=2"},
 		},
 		{
 			name: "Windows",
@@ -42,6 +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 }
 			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)
 			}