Release Workflow (#1)

.github/maven-central-deploy.sh

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+#!/bin/bash
+#
+# This script takes care of deploying tagged versions to maven central and updating the pom.xml
+# version with next development version.
+#
+# Required environment variables: GPG_SECRET_KEYS, GPG_OWNERTRUST, GPG_EXECUTABLE
+
+set -eo pipefail
+
+echo $GPG_SECRET_KEYS | base64 --decode | $GPG_EXECUTABLE --batch --import
+echo $GPG_OWNERTRUST | base64 --decode | $GPG_EXECUTABLE --batch --import-ownertrust
+mvn --batch-mode deploy -Prelease -DskipTests --settings .github/settings.xml

.github/semver-check.sh

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+#!/bin/bash
+#
+# This script checks that the version number of the release is an expected one, and avoid erroneous releases which don't follow semver
+set -eo pipefail
+
+git fetch --tags --quiet
+VERSION="$1"
+PREV_VERSION=$(git describe --abbrev=0 --tags `git rev-list --tags --skip=1  --max-count=1`)
+PREV_VERSION=${PREV_VERSION#v}
+PREV_MAJOR="${PREV_VERSION%%.*}"
+PREV_VERSION="${PREV_VERSION#*.}"
+PREV_MINOR="${PREV_VERSION%%.*}"
+PREV_PATCH="${PREV_VERSION#*.}"
+if [[ "$PREV_VERSION" == "$PREV_PATCH" ]]; then
+   PREV_PATCH="0"
+fi
+
+[[ "$VERSION" == "$PREV_MAJOR.$PREV_MINOR.$((PREV_PATCH + 1))" || "$VERSION" == "$PREV_MAJOR.$((PREV_MINOR + 1))" || "$VERSION" == "$((PREV_MAJOR + 1)).0" ]]

.github/settings.xml

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+<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
+                          https://maven.apache.org/xsd/settings-1.0.0.xsd">
+
+  <servers>
+    <server>
+      <id>ossrh</id>
+      <username>${env.SONATYPE_USERNAME}</username>
+      <password>${env.SONATYPE_PASSWORD}</password>
+    </server>
+  </servers>
+
+  <profiles>
+    <profile>
+      <id>ossrh</id>
+      <activation>
+        <activeByDefault>true</activeByDefault>
+      </activation>
+      <properties>
+        <gpg.executable>${env.GPG_EXECUTABLE}</gpg.executable>
+        <gpg.passphrase>${env.GPG_PASSPHRASE}</gpg.passphrase>
+      </properties>
+    </profile>
+  </profiles>
+
+</settings>

.github/workflows/release.yaml

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+name: publish release
+on:
+  release:
+    types: [ published ]
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    concurrency: blazemeter_test
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Java 1.8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+      - name: Get version
+        id: version
+        run: echo "release_version=${GITHUB_REF#refs/tags/v}" >> $GITHUB_ENV
+      - name: Check version
+        run: .github/semver-check.sh ${{ env.release_version }}
+      - name: set maven project version
+        run: mvn --batch-mode --no-transfer-progress versions:set -DnewVersion=${{ env.release_version }} --settings .github/settings.xml
+      - name: package release
+        run: mvn --batch-mode --no-transfer-progress clean package --settings .github/settings.xml
+      - name: Upload built jar into release
+        uses: svenstaro/upload-release-action@v2
+        with:
+          repo_token: ${{ secrets.GITHUB_TOKEN }}
+          file: target/*.jar
+          file_glob: true
+          tag: ${{ github.ref }}
+      - name: publish to Nexus
+        run: .github/maven-central-deploy.sh
+        env:
+          GPG_SECRET_KEYS: ${{ secrets.GPG_SECRET_KEYS }}
+          GPG_OWNERTRUST: ${{ secrets.GPG_OWNERTRUST }}
+          GPG_EXECUTABLE: gpg
+          GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}
+          SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
+          SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}