From 16dd31aba109f5b02269df1ecdebe30f83172f12 Mon Sep 17 00:00:00 2001
From: Julian de Bruin <julian.debruin@infosupport.com>
Date: Wed, 17 Nov 2021 15:02:17 +0100
Subject: [PATCH] [MNG-7339] Verify Maven can build itself

Closes #613.
---
 .github/workflows/maven_build_itself.yml | 73 ++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 .github/workflows/maven_build_itself.yml

diff --git a/.github/workflows/maven_build_itself.yml b/.github/workflows/maven_build_itself.yml
new file mode 100644
index 0000000000..3e69b2befa
--- /dev/null
+++ b/.github/workflows/maven_build_itself.yml
@@ -0,0 +1,73 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+
+name: Can Maven build itself
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+        java: [8, 11, 17]
+      fail-fast: false
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-java@v2
+        with:
+          java-version: ${{ matrix.java }}
+          distribution: 'temurin'
+          cache: 'maven'
+
+      - name: Build with Maven
+        run: mvn verify -e -B -V -DdistributionFileName=apache-maven
+
+      - name: Extract tarball
+        shell: bash
+        run: |
+          set +e
+          if [ -f ${{ env.TAR_BALL }} ]; then
+            temp_dir=$(mktemp -d)
+            tar -xzf ${{ env.TAR_BALL }} -C "$temp_dir" --strip 1
+            maven_bin_dir=$temp_dir/bin
+            if [ -d $maven_bin_dir ]; then
+              echo "tar.gz file \"${{ env.TAR_BALL }}\" succesfully extracted in temporarily directory \"$temp_dir.\""
+              echo "TEMP_MAVEN_BIN_DIR=$maven_bin_dir" >> $GITHUB_ENV
+            else
+              echo "$maven_bin_dir does not exist."
+              exit 1;
+            fi
+          else
+            echo "${{ env.TAR_BALL }} does not exist."
+            exit 1;
+          fi
+        env:
+          TAR_BALL: apache-maven/target/apache-maven-bin.tar.gz
+
+      - name: Clean with Maven
+        run: mvn clean
+
+      - name: Build again with Maven SNAPSHOT
+        shell: bash
+        run: |
+          set +e
+          export PATH=${{ env.TEMP_MAVEN_BIN_DIR }}:$PATH
+          mvn verify -e -B -V -DdistributionFileName=apache-maven