Add workflow to check pull requests in JDT UI that may break JDT-LS.

Signed-off-by: Roland Grunberg <[email protected]>

Author: rgrunber

.github/workflows/check-breaking-prs.yml

@@ -0,0 +1,65 @@
+name: Check JDT.UI For Breaking PRs
+
+on:
+  schedule:
+    - cron: '0 8 * * *'
+  workflow_dispatch:
+
+jobs:
+  pr-verify-job:
+    runs-on: ubuntu-latest
+    env:
+        GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        CC_LIST: '@rgrunber'
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          repository: 'eclipse-jdt/eclipse.jdt.ui'
+          fetch-depth: 2
+          path: eclipse.jdt.ui
+      - uses: actions/checkout@v4
+        with:
+          repository: 'eclipse-jdtls/eclipse.jdt.ls'
+          fetch-depth: 2
+          path: eclipse.jdt.ls
+      - name: Cache Maven local repository
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.m2/repository
+            !~/.m2/repository/org/eclipse/jdt
+          key: maven-local-${{ hashFiles('eclipse.jdt.ui/pom.xml') }}
+      - name: Set Up Java
+        uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'adopt'
+      - name: Set up Maven
+        uses: stCarolas/setup-maven@07fbbe97d97ef44336b7382563d66743297e442f # v4.5
+        with:
+          maven-version: 3.9.4
+      - name: Check eclipse.jdt.ui PRs
+        continue-on-error: true
+        run: |
+          PRS=`gh --repo=eclipse-jdt/eclipse.jdt.ui pr list --json number | jq .[].number`
+          set +e
+          for number in `echo ${PRS}`; do
+            touchesFiles=`gh --repo=eclipse-jdt/eclipse.jdt.ui pr view ${number} --json files | jq .files[].path | grep 'org.eclipse.jdt.core.manipulation' | wc -l`
+            alreadyCommented=`gh --repo=eclipse-jdt/eclipse.jdt.ui pr view ${number} --json comments | jq -r .comments[].body | grep 'eclipse-jdtls/eclipse.jdt.ls' | wc -l`
+            if [ "${touchesFiles}" != "0" ] && [ "${alreadyCommented}" == "0" ]; then
+              pushd eclipse.jdt.ui
+              git fetch origin pull/${number}/head
+              git checkout FETCH_HEAD
+              mvn -B clean install -Pbuild-individual-bundles -pl org.eclipse.jdt.core.manipulation
+              if [ $? -eq 0 ]; then
+                popd
+                pushd eclipse.jdt.ls
+                mvn -B clean verify -DskipTests
+                if [ $? -ne 0 ]; then
+                  gh --repo=eclipse-jdt/eclipse.jdt.ui pr comment ${number} --body="This pull request may break the eclipse-jdtls/eclipse.jdt.ls project. CC'ing ${{ env.CC_LIST }} for awareness."
+                fi
+              fi
+              popd
+            fi
+          done
+          set -e