Extract cmdutil package

cmd/gh/main.go

@@ -11,6 +11,7 @@ import (
 
 	"github.com/cli/cli/command"
 	"github.com/cli/cli/internal/config"
+	"github.com/cli/cli/pkg/cmdutil"
 	"github.com/cli/cli/update"
 	"github.com/cli/cli/utils"
 	"github.com/mgutz/ansi"
@@ -48,6 +49,10 @@ func main() {
 }
 
 func printError(out io.Writer, err error, cmd *cobra.Command, debug bool) {
+	if err == cmdutil.SilentError {
+		return
+	}
+
 	var dnsError *net.DNSError
 	if errors.As(err, &dnsError) {
 		fmt.Fprintf(out, "error connecting to %s\n", dnsError.Name)
@@ -60,7 +65,7 @@ func printError(out io.Writer, err error, cmd *cobra.Command, debug bool) {
 
 	fmt.Fprintln(out, err)
 
-	var flagError *command.FlagError
+	var flagError *cmdutil.FlagError
 	if errors.As(err, &flagError) || strings.HasPrefix(err.Error(), "unknown command ") {
 		if !strings.HasSuffix(err.Error(), "\n") {
 			fmt.Fprintln(out)

cmd/gh/main_test.go

@@ -7,7 +7,7 @@ import (
 	"net"
 	"testing"
 
-	"github.com/cli/cli/command"
+	"github.com/cli/cli/pkg/cmdutil"
 	"github.com/spf13/cobra"
 )
 
@@ -49,7 +49,7 @@ check your internet connection or githubstatus.com
 		{
 			name: "Cobra flag error",
 			args: args{
-				err:   &command.FlagError{Err: errors.New("unknown flag --foo")},
+				err:   &cmdutil.FlagError{Err: errors.New("unknown flag --foo")},
 				cmd:   cmd,
 				debug: false,
 			},

command/issue.go

@@ -73,14 +73,9 @@ var issueStatusCmd = &cobra.Command{
 	RunE:  issueStatus,
 }
 var issueViewCmd = &cobra.Command{
-	Use: "view {<number> | <url>}",
-	Args: func(cmd *cobra.Command, args []string) error {
-		if len(args) < 1 {
-			return FlagError{errors.New("issue number or URL required as argument")}
-		}
-		return nil
-	},
+	Use:   "view {<number> | <url>}",
 	Short: "View an issue",
+	Args:  cobra.ExactArgs(1),
 	Long: `Display the title, body, and other information about an issue.
 
 With '--web', open the issue in a web browser instead.`,

command/root.go

@@ -13,6 +13,7 @@ import (
 	"github.com/cli/cli/internal/config"
 	"github.com/cli/cli/internal/ghrepo"
 	apiCmd "github.com/cli/cli/pkg/cmd/api"
+	"github.com/cli/cli/pkg/cmdutil"
 	"github.com/cli/cli/utils"
 
 	"github.com/spf13/cobra"
@@ -60,25 +61,12 @@ func init() {
 		if err == pflag.ErrHelp {
 			return err
 		}
-		return &FlagError{Err: err}
+		return &cmdutil.FlagError{Err: err}
 	})
 
 	RootCmd.AddCommand(apiCmd.NewCmdApi())
 }
 
-// FlagError is the kind of error raised in flag processing
-type FlagError struct {
-	Err error
-}
-
-func (fe FlagError) Error() string {
-	return fe.Err.Error()
-}
-
-func (fe FlagError) Unwrap() error {
-	return fe.Err
-}
-
 // RootCmd is the entry point of command-line execution
 var RootCmd = &cobra.Command{
 	Use:   "gh <command> <subcommand> [flags]",

pkg/cmdutil/errors.go

@@ -0,0 +1,19 @@
+package cmdutil
+
+import "errors"
+
+// FlagError is the kind of error raised in flag processing
+type FlagError struct {
+	Err error
+}
+
+func (fe FlagError) Error() string {
+	return fe.Err.Error()
+}
+
+func (fe FlagError) Unwrap() error {
+	return fe.Err
+}
+
+// SilentError is an error that triggers exit code 1 without any error messaging
+var SilentError = errors.New("SilentError")