Show extension information in k6 version output

cmd/integration_test.go

@@ -41,7 +41,7 @@ func TestVersion(t *testing.T) {
 	assert.Contains(t, stdOut, runtime.Version())
 	assert.Contains(t, stdOut, runtime.GOOS)
 	assert.Contains(t, stdOut, runtime.GOARCH)
-	assert.NotContains(t, stdOut[:len(stdOut)-1], "\n")
+	assert.Contains(t, stdOut, "k6/x/alarmist")
 
 	assert.Empty(t, ts.stdErr.Bytes())
 	assert.Empty(t, ts.loggerHook.Drain())

cmd/version.go

@@ -2,9 +2,11 @@ package cmd
 
 import (
 	"fmt"
+	"strings"
 
 	"github.com/spf13/cobra"
 
+	"go.k6.io/k6/ext"
 	"go.k6.io/k6/lib/consts"
 )
 
@@ -16,6 +18,15 @@ func getCmdVersion(globalState *globalState) *cobra.Command {
 		Long:  `Show the application version and exit.`,
 		Run: func(_ *cobra.Command, _ []string) {
 			printToStdout(globalState, fmt.Sprintf("k6 v%s\n", consts.FullVersion()))
+
+			if exts := ext.GetAll(); len(exts) > 0 {
+				extsDesc := make([]string, 0, len(exts))
+				for _, e := range exts {
+					extsDesc = append(extsDesc, fmt.Sprintf("  %s", e.String()))
+				}
+				printToStdout(globalState, fmt.Sprintf("Extensions:\n%s\n",
+					strings.Join(extsDesc, "\n")))
+			}
 		},
 	}
 }