Add initial distributor CLI skeleton

internal/cli/version.go

@@ -0,0 +1,29 @@
+package cli
+
+import (
+	"context"
+	"fmt"
+	"io"
+
+	"gitea.maximumdirect.net/eric/distributor/internal/app"
+)
+
+func versionCommand(_ context.Context, args []string, stdout, stderr io.Writer) int {
+	if hasHelp(args) {
+		printVersionHelp(stdout)
+		return exitOK
+	}
+	if rejectExtraArgs(stderr, "version", args) {
+		return exitUsage
+	}
+	fmt.Fprintln(stdout, app.VersionString())
+	return exitOK
+}
+
+func printVersionHelp(w io.Writer) {
+	fmt.Fprint(w, `Usage:
+  distributor version
+
+Print version information.
+`)
+}