Add .gitignore and pom.xml (#3)

* Add gitignore

* Add pom.xml

* Remove unnecessary fields from gitignore, add checkstyle and jacoco plugins, add workflows

.github/workflows/ci.yaml

@@ -0,0 +1,51 @@
+name: CI
+
+on: push
+
+jobs:
+  verify:
+    name: Verify Code
+    runs-on: ubuntu-latest
+
+    env:
+      COVERITY: coverity_tool
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Setup Maven Central
+        uses: actions/setup-java@v2
+        with:
+          java-version: 8.0.292+10
+          distribution: 'adopt'
+
+      - name: Cache Local Maven Repository
+        uses: actions/cache@v2
+        with:
+          path: ~/.m2/repository
+          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+
+      - name: Compile Test and Verify
+        run: mvn --batch-mode clean verify
+
+      - name: Cache Coverity
+        id: cache_coverity
+        uses: actions/cache@v2
+        with:
+          path: ${{ env.COVERITY }}
+          key: coverity
+
+      - name: Download Coverity
+        if: steps.cache_coverity.outputs.cache-hit != 'true'
+        run: |
+          wget --quiet https://scan.coverity.com/download/linux64 --post-data "token=${{ secrets.COVERITY_TOKEN }}&project=${{ vars.COVERITY_PROJECT_URL_NAME }}" -O ${{ env.COVERITY }}.tgz
+          mkdir -p ${{ env.COVERITY }}
+          tar zxvf ${{ env.COVERITY }}.tgz -C ${{ env.COVERITY }} --strip-components 1
+
+      - name: Compile Coverity
+        run: |
+          ${{ env.COVERITY }}/bin/cov-build --dir cov-int mvn -DskipTests=true --batch-mode clean compile
+          tar czvf sources.tgz cov-int
+
+      - name: Upload to Coverity
+        run: curl --silent --form token=${{ secrets.COVERITY_TOKEN }} --form email=${{ secrets.COVERITY_EMAIL }} --form file=@sources.tgz --form version="${GITHUB_REF##*/}" --form description="automated upload" https://scan.coverity.com/builds?project=${{ vars.COVERITY_PROJECT_URL_NAME }}

.github/workflows/upload_release.yaml

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+name: Upload Release
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  upload:
+    name: Upload
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Cache Local Maven Repository
+        uses: actions/cache@v2
+        with:
+          path: ~/.m2/repository
+          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+
+      - name: Setup Signing
+        uses: actions/setup-java@v2
+        with:
+          java-version: 11
+          distribution: 'adopt'
+          gpg-private-key: ${{ secrets.MAVEN_GPG_PRIVATE_KEY }}
+          gpg-passphrase: MAVEN_GPG_PASSPHRASE
+
+      - name: Setup GitHub Packages
+        uses: actions/setup-java@v2
+        with:
+          java-version: 11
+          distribution: 'adopt'
+          gpg-passphrase: MAVEN_GPG_PASSPHRASE
+
+      - name: Publish to GitHub Packages
+        run: mvn --batch-mode -Drevision=${{ github.event.release.tag_name }} -Dsha1= -Dchangelist= clean deploy -Ppublish-github-packages
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          MAVEN_GPG_PASSPHRASE: ${{ secrets.MAVEN_GPG_PASSPHRASE }}
+
+      - name: Setup Maven Central
+        uses: actions/setup-java@v2
+        with:
+          java-version: 11
+          distribution: 'adopt'
+
+          server-id: central-sonatype-org
+          server-username: CENTRAL_SONATYPE_ORG_USERNAME
+          server-password: CENTRAL_SONATYPE_ORG_PASSWORD
+          gpg-passphrase: MAVEN_GPG_PASSPHRASE
+
+      - name: Publish to Maven Central
+        run: mvn --batch-mode -Drevision=${{ github.event.release.tag_name }} -Dsha1= -Dchangelist= clean deploy -Ppublish-maven-central
+        env:
+          CENTRAL_SONATYPE_ORG_USERNAME: ${{ secrets.CENTRAL_SONATYPE_ORG_USERNAME }}
+          CENTRAL_SONATYPE_ORG_PASSWORD: ${{ secrets.CENTRAL_SONATYPE_ORG_PASSWORD }}
+          MAVEN_GPG_PASSPHRASE: ${{ secrets.MAVEN_GPG_PASSPHRASE }}

.gitignore

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+/target/
+/.settings/
+/.vscode/
+/.idea/
+/*.iml
+/.classpath
+/.factorypath
+/.flattened-pom.xml
+.project