Codegen: simpler k8s.io/code-generator/examples

This moves the hack/ directory and scripts to the examples dir, which is
a distinct module.  This avoids some Go unpleasantness around module
boundaries and just makes more sense.

hack/update-codegen.sh

@@ -35,7 +35,7 @@ UPDATE_API_KNOWN_VIOLATIONS="${UPDATE_API_KNOWN_VIOLATIONS:-}"
 
 OUT_DIR="_output"
 PRJ_SRC_PATH="k8s.io/kubernetes"
-BOILERPLATE_FILENAME="vendor/k8s.io/code-generator/hack/boilerplate.go.txt"
+BOILERPLATE_FILENAME="hack/boilerplate/boilerplate.generatego.txt"
 APPLYCONFIG_PKG="k8s.io/client-go/applyconfigurations"
 
 # Any time we call sort, we want it in the same locale.
@@ -885,7 +885,7 @@ function codegen::subprojects() {
     # Call generation on sub-projects.
     # TODO(thockin): make these take a list of codegens and flags
     local subs=(
-        vendor/k8s.io/code-generator/hack/update-codegen.sh
+        vendor/k8s.io/code-generator/examples/hack/update-codegen.sh
         vendor/k8s.io/kube-aggregator/hack/update-codegen.sh
         vendor/k8s.io/sample-apiserver/hack/update-codegen.sh
         vendor/k8s.io/sample-controller/hack/update-codegen.sh

staging/src/k8s.io/code-generator/examples/hack/update-codegen.sh

@@ -18,34 +18,36 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-SCRIPT_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
+SCRIPT_DIR="$(dirname "${BASH_SOURCE[0]}")"
+SCRIPT_ROOT="${SCRIPT_DIR}/.."
+CODEGEN_PKG="${CODEGEN_PKG:-"${SCRIPT_ROOT}/.."}"
 
 # generate the code with:
 # - --output-base because this script should also be able to run inside the vendor dir of
 #   k8s.io/kubernetes. The output-base is needed for the generators to output into the vendor dir
 #   instead of the $GOPATH directly. For normal projects this can be dropped.
-"${SCRIPT_ROOT}/generate-internal-groups.sh" "client,conversion,deepcopy,defaulter,informer,lister,openapi" \
+"${CODEGEN_PKG}/generate-internal-groups.sh" "client,conversion,deepcopy,defaulter,informer,lister,openapi" \
   k8s.io/code-generator/examples/apiserver \
   k8s.io/code-generator/examples/apiserver/apis \
   k8s.io/code-generator/examples/apiserver/apis \
   "example:v1 example2:v1 example3.io:v1" \
-  --output-base "$(dirname "${BASH_SOURCE[0]}")/../../.." \
-  --go-header-file "${SCRIPT_ROOT}/hack/boilerplate.go.txt"
-"${SCRIPT_ROOT}/generate-groups.sh" "applyconfiguration,client,deepcopy,defaulter,informer,lister" \
+  --output-base "${SCRIPT_DIR}/../../../.." \
+  --go-header-file "${SCRIPT_DIR}/boilerplate.go.txt"
+"${CODEGEN_PKG}/generate-groups.sh" "applyconfiguration,client,deepcopy,defaulter,informer,lister" \
   k8s.io/code-generator/examples/crd \
   k8s.io/code-generator/examples/crd/apis \
   "example:v1 example2:v1" \
-  --output-base "$(dirname "${BASH_SOURCE[0]}")/../../.." \
-  --go-header-file "${SCRIPT_ROOT}/hack/boilerplate.go.txt"
-"${SCRIPT_ROOT}/generate-groups.sh" "applyconfiguration,client,deepcopy,defaulter,informer,lister" \
+  --output-base "${SCRIPT_DIR}/../../../.." \
+  --go-header-file "${SCRIPT_DIR}/boilerplate.go.txt"
+"${CODEGEN_PKG}/generate-groups.sh" "applyconfiguration,client,deepcopy,defaulter,informer,lister" \
   k8s.io/code-generator/examples/MixedCase \
   k8s.io/code-generator/examples/MixedCase/apis \
   "example:v1" \
-  --output-base "$(dirname "${BASH_SOURCE[0]}")/../../.." \
-  --go-header-file "${SCRIPT_ROOT}/hack/boilerplate.go.txt"
-"${SCRIPT_ROOT}/generate-groups.sh" "applyconfiguration,client,deepcopy,defaulter,informer,lister" \
+  --output-base "${SCRIPT_DIR}/../../../.." \
+  --go-header-file "${SCRIPT_DIR}/boilerplate.go.txt"
+"${CODEGEN_PKG}/generate-groups.sh" "applyconfiguration,client,deepcopy,defaulter,informer,lister" \
   k8s.io/code-generator/examples/HyphenGroup \
   k8s.io/code-generator/examples/HyphenGroup/apis \
   "example:v1" \
-  --output-base "$(dirname "${BASH_SOURCE[0]}")/../../.." \
-  --go-header-file "${SCRIPT_ROOT}/hack/boilerplate.go.txt"
+  --output-base "${SCRIPT_DIR}/../../../.." \
+  --go-header-file "${SCRIPT_DIR}/boilerplate.go.txt"

staging/src/k8s.io/code-generator/examples/hack/verify-codegen.sh

@@ -18,14 +18,12 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-SCRIPT_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
-
-DIFFROOT="${SCRIPT_ROOT}/examples"
-TMP_DIFFROOT="${SCRIPT_ROOT}/_tmp/examples"
-_tmp="${SCRIPT_ROOT}/_tmp"
+SCRIPT_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd -P)"
+DIFFROOT="${SCRIPT_ROOT}"
+TMP_DIFFROOT="$(mktemp -d -t "$(basename "$0").XXXXXX")"
 
 cleanup() {
-  rm -rf "${_tmp}"
+  rm -rf "${TMP_DIFFROOT}"
 }
 trap "cleanup" EXIT SIGINT
 
@@ -38,9 +36,7 @@ cp -a "${DIFFROOT}"/* "${TMP_DIFFROOT}"
 echo "diffing ${DIFFROOT} against freshly generated codegen"
 ret=0
 diff -Naupr "${DIFFROOT}" "${TMP_DIFFROOT}" || ret=$?
-cp -a "${TMP_DIFFROOT}"/* "${DIFFROOT}"
-if [[ $ret -eq 0 ]]
-then
+if [[ $ret -eq 0 ]]; then
   echo "${DIFFROOT} up to date."
 else
   echo "${DIFFROOT} is out of date. Please run hack/update-codegen.sh"
@@ -49,7 +45,7 @@ fi
 
 # smoke test
 echo "Smoke testing examples by compiling..."
-pushd "./${SCRIPT_ROOT}/examples"
+pushd "${SCRIPT_ROOT}"
   go build "k8s.io/code-generator/examples/crd/..."
   go build "k8s.io/code-generator/examples/apiserver/..."
   go build "k8s.io/code-generator/examples/MixedCase/..."