Copy login device code to clipboard

cmd/entire/cli/login.go

@@ -12,6 +12,7 @@ import (
 	"runtime"
 	"time"
 
+	"github.com/atotto/clipboard"
 	"github.com/entireio/cli/cmd/entire/cli/auth"
 	"github.com/entireio/cli/cmd/entire/cli/interactive"
 	"github.com/spf13/cobra"
@@ -26,6 +27,9 @@ const maxTransientErrors = 5
 // browserOpenFunc is the signature for opening a URL in the user's browser.
 type browserOpenFunc func(ctx context.Context, url string) error
 
+// clipboardWriteFunc is the signature for copying text to the user's clipboard.
+type clipboardWriteFunc func(text string) error
+
 // deviceAuthClient abstracts the auth client so runLogin and waitForApproval can be unit-tested.
 type deviceAuthClient interface {
 	StartDeviceAuth(ctx context.Context) (*auth.DeviceAuthStart, error)
@@ -42,20 +46,23 @@ func newLoginCmd() *cobra.Command {
 			if err := requireSecureBaseURL(insecureHTTPAuth); err != nil {
 				return err
 			}
-			return runLogin(cmd.Context(), cmd.OutOrStdout(), cmd.ErrOrStderr(), auth.NewClient(nil), openBrowser)
+			return runLogin(cmd.Context(), cmd.OutOrStdout(), cmd.ErrOrStderr(), auth.NewClient(nil), openBrowser, copyToClipboard)
 		},
 	}
 	addInsecureHTTPAuthFlag(cmd, &insecureHTTPAuth)
 	return cmd
 }
 
-func runLogin(ctx context.Context, outW, errW io.Writer, client deviceAuthClient, openURL browserOpenFunc) error {
+func runLogin(ctx context.Context, outW, errW io.Writer, client deviceAuthClient, openURL browserOpenFunc, writeClipboard clipboardWriteFunc) error {
 	start, err := client.StartDeviceAuth(ctx)
 	if err != nil {
 		return fmt.Errorf("start login: %w", err)
 	}
 
 	fmt.Fprintf(outW, "Device code: %s\n", start.UserCode)
+	if copied := copyDeviceCodeToClipboard(errW, start.UserCode, writeClipboard); copied {
+		fmt.Fprintln(outW, "Device code copied to clipboard.")
+	}
 
 	approvalURL := start.VerificationURI
 
@@ -94,6 +101,24 @@ func runLogin(ctx context.Context, outW, errW io.Writer, client deviceAuthClient
 	return nil
 }
 
+func copyDeviceCodeToClipboard(errW io.Writer, userCode string, writeClipboard clipboardWriteFunc) bool {
+	if writeClipboard == nil {
+		return false
+	}
+	if err := writeClipboard(userCode); err != nil {
+		fmt.Fprintf(errW, "Warning: failed to copy device code to clipboard: %v\n", err)
+		return false
+	}
+	return true
+}
+
+func copyToClipboard(text string) error {
+	if err := clipboard.WriteAll(text); err != nil {
+		return fmt.Errorf("write clipboard: %w", err)
+	}
+	return nil
+}
+
 func waitForApproval(ctx context.Context, poller deviceAuthClient, deviceCode string, expiresIn int, interval, slowDownBackoff time.Duration) (string, error) {
 	expiry := time.Duration(expiresIn) * time.Second
 	if expiry <= 0 || expiry > maxExpiresIn {

cmd/entire/cli/login_test.go

@@ -1,6 +1,7 @@
 package cli
 
 import (
+	"bytes"
 	"context"
 	"errors"
 	"strings"
@@ -38,6 +39,43 @@ func (m *mockClient) PollDeviceAuth(_ context.Context, _ string) (*auth.DeviceAu
 	return r.result, r.err
 }
 
+func TestCopyDeviceCodeToClipboard_Success(t *testing.T) {
+	t.Parallel()
+
+	var errBuf bytes.Buffer
+	var copied string
+	ok := copyDeviceCodeToClipboard(&errBuf, "ABCD-1234", func(text string) error {
+		copied = text
+		return nil
+	})
+
+	if !ok {
+		t.Fatal("copyDeviceCodeToClipboard() = false, want true")
+	}
+	if copied != "ABCD-1234" {
+		t.Fatalf("copied = %q, want device code", copied)
+	}
+	if errBuf.Len() != 0 {
+		t.Fatalf("stderr = %q, want empty", errBuf.String())
+	}
+}
+
+func TestCopyDeviceCodeToClipboard_Failure(t *testing.T) {
+	t.Parallel()
+
+	var errBuf bytes.Buffer
+	ok := copyDeviceCodeToClipboard(&errBuf, "ABCD-1234", func(_ string) error {
+		return errors.New("clipboard unavailable")
+	})
+
+	if ok {
+		t.Fatal("copyDeviceCodeToClipboard() = true, want false")
+	}
+	if !strings.Contains(errBuf.String(), "failed to copy device code to clipboard") {
+		t.Fatalf("stderr = %q, want clipboard warning", errBuf.String())
+	}
+}
+
 func TestWaitForApproval_ImmediateSuccess(t *testing.T) {
 	t.Parallel()
 

go.mod

@@ -8,6 +8,7 @@ require (
 	charm.land/glamour/v2 v2.0.0
 	charm.land/huh/v2 v2.0.3
 	charm.land/lipgloss/v2 v2.0.3
+	github.com/atotto/clipboard v0.1.4
 	github.com/betterleaks/betterleaks v1.1.2
 	github.com/creack/pty v1.1.24
 	github.com/denisbrodbeck/machineid v1.0.1
@@ -40,7 +41,6 @@ require (
 	github.com/alecthomas/chroma/v2 v2.14.0 // indirect
 	github.com/andybalholm/brotli v1.2.0 // indirect
 	github.com/antlr4-go/antlr/v4 v4.13.1 // indirect
-	github.com/atotto/clipboard v0.1.4 // indirect
 	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
 	github.com/aymerick/douceur v0.2.0 // indirect
 	github.com/bodgit/plumbing v1.3.0 // indirect