Backport GH actions to 5.4

.github/ci-prerequisites.sh

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+# Reclaim disk space, otherwise we only have 13 GB free at the start of a job
+
+docker rmi node:10 node:12 mcr.microsoft.com/azure-pipelines/node8-typescript:latest
+# That is 18 GB
+sudo rm -rf /usr/share/dotnet
+# That is 1.2 GB
+sudo rm -rf /usr/share/swift

.github/workflows/contributor-build.yml

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+# The main CI of Hibernate ORM is https://ci.hibernate.org/job/hibernate-orm-6.0-h2-main/.
+# However, Hibernate ORM builds run on GitHub actions regularly
+# to check that it still works and can be used in GitHub forks.
+# See https://docs.github.com/en/free-pro-team@latest/actions
+# for more information about GitHub actions.
+
+name: Hibernate ORM build
+
+on:
+  push:
+    branches:
+      - '5.4'
+  pull_request:
+    branches:
+      - '5.4'
+jobs:
+  build:
+    name: Java 8
+    runs-on: ubuntu-latest
+    # We want to know the test results of all matrix entries
+    continue-on-error: true
+    strategy:
+      fail-fast: false
+      matrix:
+        # When GitHub Actions supports it: https://github.com/actions/toolkit/issues/399
+        # We will use the experimental flag as indicator whether a failure should cause a workflow failure
+        include:
+          - rdbms: h2
+            experimental: false
+#          - rdbms: derby
+#            experimental: true
+#          - rdbms: mariadb
+#            experimental: true
+          - rdbms: postgresql
+            experimental: true
+#          - rdbms: oracle
+#            experimental: true
+#          - rdbms: db2
+#            experimental: true
+#          - rdbms: mssql
+#            experimental: true
+    steps:
+      - uses: actions/checkout@v2
+      - name: Reclaim Disk Space
+        run: .github/ci-prerequisites.sh
+      - name: Set up Java 8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+      - name: Get year/month for cache key
+        id: get-date
+        run: |
+          echo "::set-output name=yearmonth::$(/bin/date -u "+%Y-%m")"
+        shell: bash
+      - name: Cache Maven local repository
+        uses: actions/cache@v2
+        id: cache-maven
+        with:
+          path: |
+            ~/.m2/repository
+            ~/.gradle/caches/
+            ~/.gradle/wrapper/
+          # refresh cache every month to avoid unlimited growth
+          key: maven-localrepo-${{ steps.get-date.outputs.yearmonth }}
+      - name: Run build script
+        env:
+          RDBMS: ${{ matrix.rdbms }}
+        run: ./ci/build-github.sh
+        shell: bash
+      - name: Upload test reports (if Gradle failed)
+        uses: actions/upload-artifact@v2
+        if: failure()
+        with:
+          name: test-reports-java8-${{ matrix.rdbms }}
+          path: |
+            ./**/target/reports/tests/
+            ./**/target/reports/checkstyle/
+      - name: Omit produced artifacts from build cache
+        run: ./ci/before-cache.sh
+  build11:
+    name: Java 11
+    runs-on: ubuntu-latest
+    # We want to know the test results of all matrix entries
+    continue-on-error: true
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Java 11
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11
+      - name: Get year/month for cache key
+        id: get-date
+        run: |
+          echo "::set-output name=yearmonth::$(/bin/date -u "+%Y-%m")"
+        shell: bash
+      - name: Cache Maven local repository
+        uses: actions/cache@v2
+        id: cache-maven
+        with:
+          path: |
+            ~/.m2/repository
+            ~/.gradle/caches/
+            ~/.gradle/wrapper/
+          # refresh cache every month to avoid unlimited growth
+          key: maven-localrepo-${{ steps.get-date.outputs.yearmonth }}
+      - name: Run build script
+        run: ./ci/build-github.sh
+        shell: bash
+      - name: Upload test reports (if Gradle failed)
+        uses: actions/upload-artifact@v2
+        if: failure()
+        with:
+          name: test-reports-java11
+          path: |
+            ./**/target/reports/tests/
+            ./**/target/reports/checkstyle/
+      - name: Omit produced artifacts from build cache
+        run: ./ci/before-cache.sh

ci/before-cache.sh

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+#! /bin/bash
+
+rm -f  $HOME/.gradle/caches/modules-2/modules-2.lock
+rm -fr $HOME/.gradle/caches/*/plugin-resolution/
+rm -f  $HOME/.gradle/caches/*/fileHashes/fileHashes.bin
+rm -f  $HOME/.gradle/caches/*/fileHashes/fileHashes.lock
+rm -fr $HOME/.m2/repository/org/hibernate

ci/build-github.sh

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+#! /bin/bash
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+
+java -version
+
+if [ "$RDBMS" == 'mysql' ]; then
+  bash $DIR/../docker_db.sh mysql_5_7
+elif [ "$RDBMS" == 'mysql8' ]; then
+  bash $DIR/../docker_db.sh mysql_8_0
+elif [ "$RDBMS" == 'mariadb' ]; then
+  bash $DIR/../docker_db.sh mariadb
+elif [ "$RDBMS" == 'postgresql' ]; then
+  bash $DIR/../docker_db.sh postgresql_9_5
+elif [ "$RDBMS" == 'db2' ]; then
+  bash $DIR/../docker_db.sh db2
+elif [ "$RDBMS" == 'oracle' ]; then
+  bash $DIR/../docker_db.sh oracle
+elif [ "$RDBMS" == 'mssql' ]; then
+  bash $DIR/../docker_db.sh mssql
+fi
+
+exec bash $DIR/build.sh

ci/build-travis.sh

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+#! /bin/bash
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+
+java -version
+
+if [ "$RDBMS" == 'mysql' ]; then
+  sudo service mysql stop
+  bash $DIR/../docker_db.sh mysql_5_7
+elif [ "$RDBMS" == 'mysql8' ]; then
+  sudo service mysql stop
+  bash $DIR/../docker_db.sh mysql_8_0
+elif [ "$RDBMS" == 'mariadb' ]; then
+  sudo service mysql stop
+  bash $DIR/../docker_db.sh mariadb
+elif [ "$RDBMS" == 'postgresql' ]; then
+  sudo service postgres stop
+  bash $DIR/../docker_db.sh postgresql_9_5
+elif [ "$RDBMS" == 'db2' ]; then
+  bash $DIR/../docker_db.sh db2
+elif [ "$RDBMS" == 'oracle' ]; then
+  bash $DIR/../docker_db.sh oracle
+elif [ "$RDBMS" == 'mssql' ]; then
+  bash $DIR/../docker_db.sh mssql
+fi
+
+exec bash $DIR/build.sh

ci/build.sh

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+#! /bin/bash
+
+goal=
+if [ "$RDBMS" == "derby" ]; then
+  goal="-Pdb=derby"
+elif [ "$RDBMS" == "mariadb" ]; then
+  goal="-Pdb=mariadb_ci"
+elif [ "$RDBMS" == "postgresql" ]; then
+  goal="-Pdb=pgsql_ci"
+elif [ "$RDBMS" == "oracle" ]; then
+  goal="-Pdb=oracle_ci"
+elif [ "$RDBMS" == "db2" ]; then
+  goal="-Pdb=db2_ci"
+elif [ "$RDBMS" == "mssql" ]; then
+  goal="-Pdb=mssql_ci"
+fi
+
+exec ./gradlew check ${goal} -Plog-test-progress=true --stacktrace