pkg/downloader: use stderr

AkihiroSuda · AkihiroSuda · commit 781d1b898fc3 · 2023-09-29T02:00:10.000+09:00
Signed-off-by: Akihiro Suda &lt;akihiro.suda.cz@hco.ntt.co.jp&gt;
diff --git a/pkg/downloader/downloader.go b/pkg/downloader/downloader.go
@@ -441,7 +441,8 @@ func downloadHTTP(localPath, url string, description string, expectedDigest dige
 		if description == "" {
 			description = url
 		}
-		fmt.Printf("Downloading %s\n", description)
+		// stderr corresponds to the progress bar output
+		fmt.Fprintf(os.Stderr, "Downloading %s\n", description)
 	}
 	bar.Start()
 	if _, err := io.Copy(multiWriter, bar.NewProxyReader(resp.Body)); err != nil {

Original file line number	Diff line number	Diff line change
`@@ -441,7 +441,8 @@ func downloadHTTP(localPath, url string, description string, expectedDigest dige`
`441`	`441`	`if description == "" {`
`442`	`442`	`description = url`
`443`	`443`	`}`
`444`		`- fmt.Printf("Downloading %s\n", description)`
	`444`	`+ // stderr corresponds to the progress bar output`
	`445`	`+ fmt.Fprintf(os.Stderr, "Downloading %s\n", description)`
`445`	`446`	`}`
`446`	`447`	`bar.Start()`
`447`	`448`	`if _, err := io.Copy(multiWriter, bar.NewProxyReader(resp.Body)); err != nil {`