feat: support fallback browser paths with brave

internal/fast/fast.go

@@ -2,15 +2,29 @@ package fast
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"log"
 	"os"
+	"os/exec"
+	"runtime"
+	"strings"
 	"time"
 
 	"github.com/chromedp/cdproto/emulation"
 	"github.com/chromedp/chromedp"
 )
 
+// Browsers is list of non default browsers by OS
+var Browsers = map[string][]string{
+	"windows": {"", `C:\Program Files\BraveSoftware\Brave-Browser\Application\brave.exe`},
+	"darwin":  {"", `/Applications/Brave Browser.app/Contents/MacOS/BraveBrowser`},
+	"*":       {"", `brave`, `brave-browser`},
+}
+
+// NoColor tells if color should be used
+var NoColor = os.Getenv("NO_COLOR") != "" || os.Getenv("TERM") == "dumb"
+
 // Fast represents measurement structure
 type Fast struct {
 	Up       string
@@ -22,18 +36,9 @@ type Fast struct {
 // Measure does the main job.
 // It returns *Fast and error
 func Measure(noUp bool) (*Fast, error) {
-	ctx, cancel := chromedp.NewContext(
-		context.Background(),
-		chromedp.WithLogf(log.Printf),
-	)
-	defer cancel()
-
-	ctx, cancel = context.WithTimeout(ctx, 180*time.Second)
-	defer cancel()
-
 	fast := new(Fast)
 	cmds := []chromedp.Action{
-		emulation.SetUserAgentOverride(`chromedp/chromedp v0.6.10`),
+		emulation.SetUserAgentOverride(`chromedp/chromedp v0.8.6`),
 		chromedp.Navigate(`https://fast.com`),
 		chromedp.ScrollIntoView(`footer`),
 		chromedp.WaitVisible(`#speed-value.succeeded`),
@@ -49,11 +54,38 @@ func Measure(noUp bool) (*Fast, error) {
 		)
 	}
 
-	err := chromedp.Run(ctx, cmds...)
+	browsers := Browsers["*"]
+	if paths, ok := Browsers[runtime.GOOS]; ok {
+		browsers = paths
+	}
+
+	var err error
+	for _, browser := range browsers {
+		err = doMeasure(browser, fast, cmds...)
+		if err == nil || !errors.Is(err, exec.ErrNotFound) {
+			break
+		}
+	}
 
 	return fast, err
 }
 
+func doMeasure(browser string, fast *Fast, cmds ...chromedp.Action) error {
+	opts := chromedp.DefaultExecAllocatorOptions[:]
+	if browser != "" {
+		opts = append(opts, chromedp.ExecPath(browser))
+	}
+
+	allocCtx, cancel := chromedp.NewExecAllocator(context.Background(), opts...)
+	defer cancel()
+	ctx, cancel := chromedp.NewContext(allocCtx, chromedp.WithLogf(log.Printf))
+	defer cancel()
+	ctx, cancel = context.WithTimeout(ctx, 180*time.Second)
+	defer cancel()
+
+	return chromedp.Run(ctx, cmds...)
+}
+
 // Run is the ready to use API.
 // For customization call Measure().
 func Run(noUp bool) {
@@ -71,22 +103,16 @@ func Run(noUp bool) {
 func Out(fast *Fast, start time.Time) {
 	hasUp := fast.Up != "" && fast.UpUnit != ""
 
-	// No color for windows
-	if os.PathSeparator == '\\' {
-		fmt.Printf("download speed: %s %s\n", fast.Down, fast.DownUnit)
-		if hasUp {
-			fmt.Printf("upload speed: %s %s\n", fast.Up, fast.UpUnit)
-		}
-		fmt.Printf("\n")
-		fmt.Printf("> took: %f secs\n", time.Since(start).Seconds())
-
-		return
+	out := fmt.Sprintf("\033[36mdownload speed:\033[m \033[32m%s\033[m %s\n", fast.Down, fast.DownUnit)
+	if hasUp {
+		out += fmt.Sprintf("\033[36mupload speed:  \033[m \033[31m%s\033[m %s\n", fast.Up, fast.UpUnit)
 	}
+	out += fmt.Sprintf("\n\033[36m> took: \033[33m%f\033[m secs\n", time.Since(start).Seconds())
 
-	fmt.Printf("\033[36mdownload speed:\033[m \033[32m%s\033[m %s\n", fast.Down, fast.DownUnit)
-	if hasUp {
-		fmt.Printf("\033[36mupload speed:\033[m \033[31m%s\033[m %s\n", fast.Up, fast.UpUnit)
+	if NoColor {
+		out = strings.ReplaceAll(strings.ReplaceAll(out, "\033[36m", ""), "\033[m", "")
+		out = strings.ReplaceAll(strings.ReplaceAll(strings.ReplaceAll(out, "\033[33m", ""), "\033[32m", ""), "\033[31m", "")
 	}
-	fmt.Printf("\n")
-	fmt.Printf("\033[36m> took: \033[33m%f\033[m secs\n", time.Since(start).Seconds())
+
+	fmt.Print(out)
 }