[MNG-7339] Verify Maven can build itself
Closes #613.
diff --git a/.github/workflows/maven_build_itself.yml b/.github/workflows/maven_build_itself.yml
new file mode 100644
index 0000000..3e69b2b
--- /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
