Fix piping 'cosign verify' using fulcio/rekor (sigstore#1590)

marcofranssen · mlieberman85 · commit 4e978c344bfa · 2022-05-06T18:27:47.000Z
Signed-off-by: Marco Franssen &lt;marco.franssen@gmail.com&gt;
diff --git a/cmd/cosign/cli/verify/verify.go b/cmd/cosign/cli/verify/verify.go
@@ -213,9 +213,9 @@ func PrintVerification(imgRef string, verified []oci.Signature, output string) {
 	case "text":
 		for _, sig := range verified {
 			if cert, err := sig.Cert(); err == nil && cert != nil {
-				fmt.Println("Certificate subject: ", sigs.CertSubject(cert))
+				fmt.Fprintln(os.Stderr, "Certificate subject: ", sigs.CertSubject(cert))
 				if issuerURL := sigs.CertIssuerExtension(cert); issuerURL != "" {
-					fmt.Println("Certificate issuer URL: ", issuerURL)
+					fmt.Fprintln(os.Stderr, "Certificate issuer URL: ", issuerURL)
 				}
 			}
 

Original file line number	Diff line number	Diff line change
`@@ -213,9 +213,9 @@ func PrintVerification(imgRef string, verified []oci.Signature, output string) {`
`213`	`213`	`case "text":`
`214`	`214`	`for _, sig := range verified {`
`215`	`215`	`if cert, err := sig.Cert(); err == nil && cert != nil {`
`216`		`- fmt.Println("Certificate subject: ", sigs.CertSubject(cert))`
	`216`	`+ fmt.Fprintln(os.Stderr, "Certificate subject: ", sigs.CertSubject(cert))`
`217`	`217`	`if issuerURL := sigs.CertIssuerExtension(cert); issuerURL != "" {`
`218`		`- fmt.Println("Certificate issuer URL: ", issuerURL)`
	`218`	`+ fmt.Fprintln(os.Stderr, "Certificate issuer URL: ", issuerURL)`
`219`	`219`	`}`
`220`	`220`	`}`
`221`	`221`