Add release workflow.

.github/workflows/release.yml

@@ -0,0 +1,39 @@
+name: Publish to Maven Central
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up JDK 1.8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+
+      - name: Cache local Maven repository
+        uses: actions/cache@v2
+        with:
+          path: ~/.m2/repository
+          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+          restore-keys: |
+            ${{ runner.os }}-maven-
+      - id: install-secret-key
+        name: Install gpg secret key
+        run: |
+          cat <(echo -e "${{ secrets.GPG_PRIVATE_KEY }}") | gpg --batch --import
+      - name: Deploy
+        run: |
+          mvn -P gpg_verify \
+            --no-transfer-progress \
+            --batch-mode -Dgpg.passphrase=${{ secrets.GPG_PASSPHRASE }} \
+            --file pom.xml -s release/m2-settings.xml verify deploy
+        env:
+          OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
+          OSSRH_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}

pom.xml

@@ -106,10 +106,48 @@
                 </plugins>
             </build>
         </profile>
+        <profile>
+            <id>gpg_verify</id>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-gpg-plugin</artifactId>
+                        <version>1.5</version>
+                        <configuration>
+                            <gpgArguments>
+                                <arg>--pinentry-mode</arg>
+                                <arg>loopback</arg>
+                            </gpgArguments>
+                        </configuration>
+                        <executions>
+                            <execution>
+                                <id>sign-artifacts</id>
+                                <phase>verify</phase>
+                                <goals>
+                                    <goal>sign</goal>
+                                </goals>
+                            </execution>
+                        </executions>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
     </profiles>
 
     <build>
         <plugins>
+            <plugin>
+                <groupId>org.sonatype.plugins</groupId>
+                <artifactId>nexus-staging-maven-plugin</artifactId>
+                <version>1.6.7</version>
+                <extensions>true</extensions>
+                <configuration>
+                    <serverId>ossrh</serverId>
+                    <nexusUrl>https://oss.sonatype.org/</nexusUrl>
+                    <autoReleaseAfterClose>true</autoReleaseAfterClose>
+                </configuration>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
@@ -169,11 +207,10 @@
     </build>
 
     <distributionManagement>
-        <repository>
-            <id>bintray-clevertap-Maven</id>
-            <name>clevertap-Maven</name>
-            <url>https://api.bintray.com/maven/clevertap/Maven/apns-http2/;publish=1</url>
-        </repository>
+        <snapshotRepository>
+            <id>ossrh</id>
+            <url>https://oss.sonatype.org/content/repositories/snapshots</url>
+        </snapshotRepository>
     </distributionManagement>
 
     <scm>

release/m2-settings.xml

@@ -0,0 +1,9 @@
+<settings>
+    <servers>
+        <server>
+            <id>ossrh</id>
+            <username>${env.OSSRH_USERNAME}</username>
+            <password>${env.OSSRH_PASSWORD}</password>
+        </server>
+    </servers>
+</settings>