fixing errcheck errors

internal/cmdline/cmdline.go

@@ -2,6 +2,7 @@ package cmdline
 
 import (
 	"bytes"
+	"errors"
 	"flag"
 	"fmt"
 	"log"
@@ -31,69 +32,78 @@ func recurseNodes(top *html.Node, sb *strings.Builder) {
 	}
 }
 
-func searchGoogle(song string) error {
+func searchGoogle(song string) (err error) {
 	runOption := &playwright.RunOptions{
 		SkipInstallBrowsers: true,
 	}
-	err := playwright.Install(runOption)
+	tempErr := playwright.Install(runOption)
-	if err != nil {
+	if tempErr != nil {
-		return fmt.Errorf("could not install playwright dependencies: %v", err)
+		err = fmt.Errorf("could not install playwright dependencies: %v", tempErr)
+		return err
 	}
-	pw, err := playwright.Run()
+	pw, tempErr := playwright.Run()
-	if err != nil {
+	if tempErr != nil {
-		return fmt.Errorf("could not start playwright: %v", err)
+		err = fmt.Errorf("could not start playwright: %v", tempErr)
+		return err
 	}
-	defer func(pw *playwright.Playwright) error {
+	defer func(pw *playwright.Playwright) {
-		err := pw.Stop()
+		tempErr := pw.Stop()
-		if err != nil {
+		if tempErr != nil {
-			return fmt.Errorf("could not stop Playwright: %v", err)
+			e := fmt.Errorf("could not stop Playwright: %v", tempErr)
+			err = errors.Join(err, e)
 		}
-		return nil
 	}(pw)
 
 	option := playwright.BrowserTypeLaunchOptions{
 		Channel:  playwright.String("chrome"),
 		Headless: playwright.Bool(false),
 	}
-	browser, err := pw.Chromium.Launch(option)
+	browser, tempErr := pw.Chromium.Launch(option)
-	if err != nil {
+	if tempErr != nil {
-		return fmt.Errorf("could not launch browser: %v", err)
+		err = fmt.Errorf("could not launch browser: %v", tempErr)
+		return err
 	}
 
-	defer func(browser playwright.Browser) error {
+	defer func(browser playwright.Browser) {
-		err = browser.Close()
+		tempErr = browser.Close()
-		if err != nil {
+		if tempErr != nil {
-			return fmt.Errorf("could not close browser: %v", err)
+			e := fmt.Errorf("could not close browser: %v", tempErr)
+			err = errors.Join(err, e)
 		}
-		return nil
 	}(browser)
-	page, err := browser.NewPage()
+	page, tempErr := browser.NewPage()
-	if err != nil {
+	if tempErr != nil {
-		return fmt.Errorf("could not create page: %v", err)
+		err = fmt.Errorf("could not create page: %v", tempErr)
+		return err
 	}
-	if _, err := page.Goto(fmt.Sprintf("https://www.google.com/search?q=%ss+lyrics", song),
+	if _, tempErr := page.Goto(fmt.Sprintf("https://www.google.com/search?q=%ss+lyrics", song),
 		playwright.PageGotoOptions{
 			WaitUntil: playwright.WaitUntilStateLoad,
-		}); err != nil {
+		}); tempErr != nil {
-		return fmt.Errorf("could not goto: %v", err)
+		err = fmt.Errorf("could not goto: %v", tempErr)
+		return err
 	}
-	err = page.Locator("body").WaitFor(playwright.LocatorWaitForOptions{
+	tempErr = page.Locator("body").WaitFor(playwright.LocatorWaitForOptions{
 		State: playwright.WaitForSelectorStateVisible,
 	})
-	if err != nil {
+	if tempErr != nil {
-		return fmt.Errorf("could not wait for body: %v", err)
+		err = fmt.Errorf("could not wait for body: %v", tempErr)
+		return err
 	}
-	html, err := page.Locator("html").InnerHTML()
+	html, tempErr := page.Locator("html").InnerHTML()
-	if err != nil {
+	if tempErr != nil {
-		return fmt.Errorf("could not get innerHtml: %v", err)
+		err = fmt.Errorf("could not get innerHtml: %v", tempErr)
+		return err
 	}
-	doc, err := htmlquery.Parse(bytes.NewReader([]byte(html)))
+	doc, tempErr := htmlquery.Parse(bytes.NewReader([]byte(html)))
 	if err != nil {
-		return fmt.Errorf("could not parse the innerHtml: %v", err)
+		err = fmt.Errorf("could not parse the innerHtml: %v", tempErr)
+		return err
 	}
-	nodes, err := htmlquery.QueryAll(doc, "//div[@data-lyricid]/div")
+	nodes, tempErr := htmlquery.QueryAll(doc, "//div[@data-lyricid]/div")
 	if err != nil {
-		return fmt.Errorf("could not get the nodes: %v", err)
+		err = fmt.Errorf("could not get the nodes: %v", tempErr)
+		return err
 	}
 
 	var sb strings.Builder
@@ -105,9 +115,10 @@ func searchGoogle(song string) error {
 			mainLog.Println("Writing lyrics from Google...")
 		}
 		filename := fmt.Sprintf("%s_google.txt", outputFile)
-		err = os.WriteFile(filename, []byte(sb.String()), os.ModePerm)
+		tempErr = os.WriteFile(filename, []byte(sb.String()), os.ModePerm)
-		if err != nil {
+		if tempErr != nil {
-			return fmt.Errorf("could not write to %s: %v", filename, err)
+			err = fmt.Errorf("could not write to %s: %v", filename, err)
+			return err
 		}
 	} else {
 		mainLog.Println("Lyrics cannot be found...")
@@ -149,7 +160,10 @@ func Main() int {
 	useGoogleFlag := flags.Bool("google", false, "Optional. Use google.")
 	useGeniusFlag := flags.Bool("genius", false, "Optional. Use genius")
 
-	flags.Parse(os.Args[1:])
+	err := flags.Parse(os.Args[1:])
+	if err != nil {
+		return 1
+	}
 
 	if len(flags.Args()) > 1 {
 		errorLog.Println("Error: too many command-line arguments")