From 592aa1298ea0a50d9916e92ff02c3b9af4be8aeb Mon Sep 17 00:00:00 2001
From: Joe Wang <joewa@google.com>
Date: Mon, 10 Mar 2025 13:08:08 -0400
Subject: [PATCH 1/3] chore: add java 8 compatibility check

---
 .../workflows/java_compatibility_check.yaml   | 43 +++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 .github/workflows/java_compatibility_check.yaml

diff --git a/.github/workflows/java_compatibility_check.yaml b/.github/workflows/java_compatibility_check.yaml
new file mode 100644
index 0000000000..261602d92c
--- /dev/null
+++ b/.github/workflows/java_compatibility_check.yaml
@@ -0,0 +1,43 @@
+# Copyright 2022 Google LLC
+#
+# 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.
+# Github action job to test core java library features on
+# downstream client libraries before they are released.
+on:
+  pull_request:
+name: Java 8 compatibility check
+jobs:
+  java8-compatibility-check:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: actions/setup-java@v4
+      with:
+        java-version: 11
+        distribution: temurin
+        cache: maven
+    - name: Install Maven modules to local Maven repository
+      run: |
+        mvn install -B -ntp  -T 1C -DskipTests -Dclirr.skip -Dcheckstyle.skip -Denforcer.skip
+    - name: Check Java 8 compatibility for class files
+      shell: bash
+      run: |
+        find . -type f -name "*.class" -path "*/classes/*" -not -path "*/grpc-*" -not -path "*/proto-*/*" -print |\
+          while IFS= read -r class_file; do
+          version=$(javap -v "${class_file}" | grep "major version" | cut -d ' ' -f 5)
+          if [[ "${version}" != "52" ]]; then
+            echo "${class_file} is not compatible with Java 8."
+            exit 1
+          fi
+        done
+        echo "All class files are compatible with Java 8."
\ No newline at end of file

From 76f544fbf31cd189b49d61895f7e0961dfbdf5b4 Mon Sep 17 00:00:00 2001
From: Joe Wang <joewa@google.com>
Date: Mon, 10 Mar 2025 13:23:42 -0400
Subject: [PATCH 2/3] exclude gapic-generator-java

---
 .github/workflows/java_compatibility_check.yaml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/java_compatibility_check.yaml b/.github/workflows/java_compatibility_check.yaml
index 261602d92c..90c13d6841 100644
--- a/.github/workflows/java_compatibility_check.yaml
+++ b/.github/workflows/java_compatibility_check.yaml
@@ -32,7 +32,10 @@ jobs:
     - name: Check Java 8 compatibility for class files
       shell: bash
       run: |
-        find . -type f -name "*.class" -path "*/classes/*" -not -path "*/grpc-*" -not -path "*/proto-*/*" -print |\
+        find . -type f -name "*.class" -path "*/classes/*" \
+          -not -path "*/grpc-*" \
+          -not -path "*/proto-*/*" \
+          -not -path "*/gapic-generator-java/*" -print |\
           while IFS= read -r class_file; do
           version=$(javap -v "${class_file}" | grep "major version" | cut -d ' ' -f 5)
           if [[ "${version}" != "52" ]]; then

From 7e6358ec018df90e997e61b98f4e8e9feeeacc16 Mon Sep 17 00:00:00 2001
From: Joe Wang <joewa@google.com>
Date: Mon, 10 Mar 2025 13:24:23 -0400
Subject: [PATCH 3/3] fix typo

---
 .github/workflows/java_compatibility_check.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/java_compatibility_check.yaml b/.github/workflows/java_compatibility_check.yaml
index 90c13d6841..a0ab4e83d5 100644
--- a/.github/workflows/java_compatibility_check.yaml
+++ b/.github/workflows/java_compatibility_check.yaml
@@ -33,7 +33,7 @@ jobs:
       shell: bash
       run: |
         find . -type f -name "*.class" -path "*/classes/*" \
-          -not -path "*/grpc-*" \
+          -not -path "*/grpc-*/*" \
           -not -path "*/proto-*/*" \
           -not -path "*/gapic-generator-java/*" -print |\
           while IFS= read -r class_file; do