Fix bug in code generator which prevented it from generating code

Signed-off-by: Andrew Keesler <akeesler@vmware.com>

hack/lib/codegen.sh

@@ -12,6 +12,10 @@ CODEGEN_IMAGE=${CODEGEN_IMAGE:-"gcr.io/tanzu-user-authentication/k8s-code-genera
 
 BASE_PKG="github.com/suzerain-io/pinniped"
 
+# This script assumes that your current working directory is the top of the module
+# in which you would like to generate code.
+MOD_DIR=$(pwd)
+
 function codegen::ensure_module_in_gopath() {
   # This should be something like "kubernetes/1.19/api".
   local pkg_name="$(realpath "--relative-to=$ROOT" "$MOD_DIR")"
@@ -49,6 +53,7 @@ function codegen::generate_for_module() {
 
   case "${mod_basename_for_version}" in
   1.19/api)
+    echo "GENERATING CODE for $mod_basename_for_version"
     codegen::invoke_code_generator generate-groups "${mod_basename_for_version}" \
       deepcopy,defaulter \
       "${BASE_PKG}/kubernetes/1.19/api/generated" \
@@ -62,12 +67,15 @@ function codegen::generate_for_module() {
       "pinniped:v1alpha1 crdpinniped:v1alpha1"
     ;;
   1.19/client-go)
+    echo "GENERATING CODE for $mod_basename_for_version"
     codegen::invoke_code_generator generate-groups "${mod_basename_for_version}" \
       client,lister,informer \
       "${BASE_PKG}/kubernetes/1.19/client-go" \
       "${BASE_PKG}/kubernetes/1.19/api/apis" \
       "pinniped:v1alpha1 crdpinniped:v1alpha1"
     ;;
+  *)
+    echo "Skipping $mod_basename_for_version because it does not contain any code to generate"
   esac
 }
 

hack/module.sh

@@ -59,10 +59,9 @@ function with_modules() {
   for mod_file in $(find . -maxdepth 4 -name go.mod | sort); do
     mod_dir="$(dirname "${mod_file}")"
     (
-      export MOD_DIR
       echo "=> "
       echo "   cd ${mod_dir} && ${cmd}"
-      cd "${mod_dir}" && MOD_DIR="$(pwd)" && ${cmd}
+      cd "${mod_dir}" && ${cmd}
     )
   done
   popd