Merge pull request eksctl-io#2007 from sayboras/bugfix/codegen-path-2

Fix code generation path issues

Makefile

@@ -173,9 +173,7 @@ site/content/usage/20-schema.md: $(call godeps,cmd/schema/generate.go)
 
 deep_copy_helper_input = $(shell $(call godeps_cmd,./pkg/apis/...) | sed 's|$(generated_code_deep_copy_helper)||' )
 $(generated_code_deep_copy_helper): $(deep_copy_helper_input) .license-header ## Generate Kubernetes API helpers
-	time env GOPATH="$(gopath)" bash "$(gopath)/pkg/mod/k8s.io/code-generator@v0.15.10/generate-groups.sh" \
-	  deepcopy,defaulter _ ./pkg/apis eksctl.io:v1alpha5 --go-header-file .license-header --output-base="$(git_toplevel)" \
-	  || (cat .license-header ; cat $(generated_code_deep_copy_helper); exit 1)
+	./tools/update-codegen.sh
 
 $(generated_code_aws_sdk_mocks): $(call godeps,pkg/eks/mocks/mocks.go)
 	mkdir -p vendor/github.com/aws/

tools/update-codegen.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+
+set -o errexit
+set -o nounset
+
+
+SCRIPT_ROOT=$(git rev-parse --show-toplevel)
+
+# Grab code-generator version from go.sum.
+CODEGEN_VERSION=$(grep 'k8s.io/code-generator' go.sum | awk '{print $2}' | head -1)
+CODEGEN_PKG=$(echo `go env GOPATH`"/pkg/mod/k8s.io/code-generator@${CODEGEN_VERSION}")
+
+echo ">> Using ${CODEGEN_PKG}"
+
+# code-generator does work with go.mod but makes assumptions about
+# the project living in `$GOPATH/src`. To work around this and support
+# any location; create a temporary directory, use this as an output
+# base, and copy everything back once generated.
+TEMP_DIR=$(mktemp -d)
+cleanup() {
+    echo ">> Removing ${TEMP_DIR}"
+    rm -rf ${TEMP_DIR}
+}
+trap "cleanup" EXIT SIGINT
+
+echo ">> Temporary output directory ${TEMP_DIR}"
+
+# Ensure we can execute.
+chmod +x ${CODEGEN_PKG}/generate-groups.sh
+
+GOPATH=$(go env GOPATH) ${CODEGEN_PKG}/generate-groups.sh deepcopy,defaulter \
+    _ github.com/weaveworks/eksctl/pkg/apis \
+    eksctl.io:v1alpha5 \
+    --go-header-file .license-header \
+    --output-base "${TEMP_DIR}"
+
+# Copy everything back.
+cp -r "${TEMP_DIR}/github.com/weaveworks/eksctl/." "${SCRIPT_ROOT}/"