Fix codegeneration that was wrong since the change of module name

hack/gen.sh

@@ -5,12 +5,33 @@ set -e -x
 # Note if you are not seeing generated code, most likely it's being placed into a different folder
 # (e.g. Do you have GOPATH directory structure correctly named for this project?)
 
+# Return a GOPATH to a temp directory. Works around the out-of-GOPATH issues
+# for k8s client gen mixed with go mod.
+# Intended to be used like:
+#   export GOPATH=$(go_mod_gopath_hack)
+function go_mod_gopath_hack() {
+  local tmp_dir=$(mktemp -d)
+  local module="$(go list -m)"
+
+  local tmp_repo="${tmp_dir}/src/${module}"
+  mkdir -p "$(dirname ${tmp_repo})"
+  ln -s "$PWD" "${tmp_repo}"
+
+  echo "${tmp_dir}"
+}
+export GOPATH=$(go_mod_gopath_hack)
+trap "rm -rf ${GOPATH}; git checkout vendor" EXIT
+
+VENDIR_PKG=carvel.dev/vendir
 # Based on vendor/k8s.io/code-generator/generate-groups.sh
+#go run vendor/k8s.io/code-generator/cmd/deepcopy-gen/main.go \
+echo "Generating deepcopy"
+rm -f $(find pkg/vendir|grep zz_generated.deepcopy)
 go run vendor/k8s.io/code-generator/cmd/deepcopy-gen/main.go \
-	--input-dirs carvel.dev/vendir/pkg/vendir/versions/v1alpha1 \
-	-O zz_generated.deepcopy \
-	--bounding-dirs carvel.dev/vendir/pkg/vendir \
-	--go-header-file ./hack/gen-boilerplate.txt
+  --input-dirs "${VENDIR_PKG}/pkg/vendir/versions/v1alpha1" \
+  --input-dirs "${KC_PKG}/pkg/vendir/versions" \
+  -O zz_generated.deepcopy \
+  --go-header-file hack/gen-boilerplate.txt
 
 # Install protoc binary as directed by https://github.com/gogo/protobuf#installation
 # (Chosen: https://github.com/protocolbuffers/protobuf/releases/download/v3.0.2/protoc-3.0.2-osx-x86_64.zip)
@@ -19,17 +40,18 @@ export PATH=$PWD/tmp/protoc-dl/bin/:$PATH
 protoc --version
 
 # Generate binaries called out by protoc binary
-rm -rf tmp/gen-apiserver-bin/
-mkdir -p tmp/gen-apiserver-bin/
-go build -o tmp/gen-apiserver-bin/protoc-gen-gogo vendor/github.com/gogo/protobuf/protoc-gen-gogo/main.go
-go build -o tmp/gen-apiserver-bin/protoc-gen-gofast vendor/github.com/gogo/protobuf/protoc-gen-gofast/main.go
-go build -o tmp/gen-apiserver-bin/goimports vendor/golang.org/x/tools/cmd/goimports/{goimports,goimports_not_gc}.go
-export PATH=$PWD/tmp/gen-apiserver-bin/:$PATH
-
-go run vendor/k8s.io/code-generator/cmd/go-to-protobuf/main.go \
-  --proto-import vendor \
-  --packages "carvel.dev/vendir/pkg/vendir/versions/v1alpha1" \
-  --go-header-file ./hack/gen-boilerplate.txt
-
-# TODO It seems that above command messes around with protos in vendor directory
-git checkout vendor/
+export GOBIN=$PWD/tmp/gen-apiserver-bin
+rm -rf $GOBIN
+go install \
+  github.com/gogo/protobuf/protoc-gen-gogo \
+  github.com/gogo/protobuf/protoc-gen-gofast \
+  golang.org/x/tools/cmd/goimports \
+  k8s.io/code-generator/cmd/go-to-protobuf
+export PATH=$GOBIN:$PATH
+
+rm -f $(find pkg/vendir|grep '\.proto')
+go-to-protobuf \
+  --proto-import "${GOPATH}/src/${VENDIR_PKG}/vendor" \
+  --packages "${VENDIR_PKG}/pkg/vendir/versions/v1alpha1" \
+  --vendor-output-base="${GOPATH}/src/${VENDIR_PKG}/vendor" \
+  --go-header-file hack/gen-boilerplate.txt