[4.x] examples removal (helidon-io#9034)

* 4.x examples removal

Signed-off-by: Maxim Nesen <[email protected]>

* Batch mode for mvn is on

Signed-off-by: Maxim Nesen <[email protected]>

---------

Signed-off-by: Maxim Nesen <[email protected]>

.github/workflows/validate.yml

@@ -143,13 +143,19 @@ jobs:
         run: |
           # prime build
           mvn ${MAVEN_ARGS} -e \
-            -Dmaven.test.skip=true \
-            -DskipTests \
-            -Ppipeline \
-            install
-          mvn ${MAVEN_ARGS} -e \
-            -f examples/pom.xml \
-            verify
+          -Dmaven.test.skip=true \
+          -DskipTests \
+          -Ppipeline \
+          install
+      - name: Examples checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: '0'
+          repository: helidon-io/helidon-examples.git
+          ref: dev-4.x
+          path: helidon-examples
+      - name: Examples build
+        run: etc/scripts/build-examples.sh
       - name: Test quickstarts native image
         run: etc/scripts/test-quickstarts.sh
   mp-tck:

.gitignore

@@ -70,6 +70,9 @@ node/
 # Helidon CLI
 .helidon
 
+# Helidon examples repository
+helidon-examples
+
 # Other
 *~
 user.txt

etc/scripts/build-examples.sh

@@ -0,0 +1,75 @@
+#!/bin/bash
+#
+# Copyright (c) 2024 Oracle and/or its affiliates.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# Build helidon examples, cloning the examples repository if needed
+
+set -o pipefail || true  # trace ERR through pipes
+set -o errtrace || true # trace ERR through commands and functions
+set -o errexit || true  # exit the script if any statement returns a non-true return value
+
+on_error(){
+    CODE="${?}" && \
+    set +x && \
+    printf "[ERROR] Error(code=%s) occurred at %s:%s command: %s\n" \
+        "${CODE}" "${BASH_SOURCE[0]}" "${LINENO}" "${BASH_COMMAND}"
+}
+trap on_error ERR
+
+# Path to this script
+if [ -h "${0}" ] ; then
+    SCRIPT_PATH="$(readlink "${0}")"
+else
+    # shellcheck disable=SC155
+    SCRIPT_PATH="${0}"
+fi
+readonly SCRIPT_PATH
+
+# Path to the root of the workspace
+# shellcheck disable=SC2046
+WS_DIR=$(cd $(dirname -- "${SCRIPT_PATH}") ; cd ../.. ; pwd -P)
+readonly WS_DIR
+
+# If needed we clone the helidon-examples repo into a subdirectory of the helidon repository
+readonly HELIDON_EXAMPLES_PATH=${WS_DIR}/helidon-examples
+if [ ! -d "${WS_DIR}/helidon-examples" ]; then
+  echo "Cloning examples repository into ${WS_DIR}/helidon-examples"
+  git clone --branch dev-4.x --single-branch [email protected]:helidon-io/helidon-examples.git "${WS_DIR}/helidon-examples"
+fi
+
+version() {
+    mvn -B -N -f "${1}" -Dexpression=helidon.version help:evaluate | grep -v '\[INFO\]'
+}
+
+# Make sure the helidon version from the example repo aligns with this repository
+HELIDON_VERSION_IN_THIS_REPO=$(version "${WS_DIR}/pom.xml")
+readonly HELIDON_VERSION_IN_THIS_REPO
+
+HELIDON_VERSION_IN_EXAMPLES=$(version "${WS_DIR}/helidon-examples/pom.xml")
+readonly HELIDON_VERSION_IN_EXAMPLES
+
+if [ "${HELIDON_VERSION_IN_THIS_REPO}" != "${HELIDON_VERSION_IN_EXAMPLES}" ]; then
+  printf "The Helidon version in this repository (%s) does not match the Helidon version in %s (%s)\n" \
+    "${HELIDON_VERSION_IN_THIS_REPO}" \
+    "${HELIDON_EXAMPLES_PATH}" \
+    "${HELIDON_VERSION_IN_EXAMPLES}"
+  exit 78
+fi
+
+# shellcheck disable=SC2086
+mvn ${MAVEN_ARGS} \
+    -f "${WS_DIR}/helidon-examples/pom.xml" \
+    clean install

etc/scripts/test-quickstarts.sh

@@ -55,10 +55,16 @@ mvn ${MAVEN_ARGS} --version
 
 "${GRAALVM_HOME}"/bin/native-image --version;
 
+# If needed we clone the helidon-examples repo into a subdirectory of the helidon repository
+if [ ! -d "${WS_DIR}/helidon-examples" ]; then
+  echo "Cloning examples repository into ${HELIDON_EXAMPLES_PATH}"
+  git clone --branch dev-4.x --single-branch [email protected]:helidon-io/helidon-examples.git "${WS_DIR}/helidon-examples"
+fi
+
 # Build quickstart native-image executable and run jar file
 readonly quickstarts="helidon-quickstart-mp helidon-quickstart-se"
 for quickstart in ${quickstarts}; do
-  cd "${WS_DIR}"/examples/quickstarts/"${quickstart}"
+  cd "${WS_DIR}/helidon-examples/examples/quickstarts/${quickstart}"
   # shellcheck disable=SC2086
   mvn ${MAVEN_ARGS} -e clean install -Pnative-image -DskipTests
   ./target/"${quickstart}" -Dexit.on.started=!