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Support building with JDK 21. #822

Support building with JDK 21.

Support building with JDK 21. #822

# This workflow makes sure that a pull request does not make any incompatible changes
# to the public API of Gson
name: Check API compatibility
on: pull_request
jobs:
check-api-compatibility:
runs-on: ubuntu-latest
steps:
- name: Checkout old version
uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
with:
ref: ${{ github.event.pull_request.base.sha }}
path: 'gson-old-japicmp'
- name: Set up JDK 11
uses: actions/setup-java@99b8673ff64fbf99d8d325f52d9a5bdedb8483e9 # v4.2.1
with:
distribution: 'temurin'
java-version: '11'
cache: 'maven'
- name: Build old version
run: |
cd gson-old-japicmp
# Set dummy version
mvn --batch-mode --no-transfer-progress org.codehaus.mojo:versions-maven-plugin:2.11.0:set -DnewVersion=JAPICMP_OLD
# Install artifacts with dummy version in local repository; used later by Maven plugin for comparison
mvn --batch-mode --no-transfer-progress install -DskipTests
- name: Checkout new version
uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
- name: Check API compatibility
id: check-compatibility
run: |
mvn --batch-mode --fail-at-end --no-transfer-progress package japicmp:cmp -DskipTests
- name: Upload API differences artifacts
uses: actions/upload-artifact@65462800fd760344b1a7b4382951275a0abb4808 # v4.3.3
# Run on workflow success (in that case differences report might include added methods and classes)
# or when API compatibility check failed
if: success() || ( failure() && steps.check-compatibility.outcome == 'failure' )
with:
name: api-differences
path: |
**/japicmp/default-cli.html
**/japicmp/default-cli.diff
# Plugin should always have created report files (though they might be empty)
if-no-files-found: error