Setup CI

.github/workflows/ci.yml

@@ -0,0 +1,40 @@
+name: CI
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+env:
+  JDK_JAVA_OPTIONS: "--add-opens java.base/java.lang=ALL-UNNAMED --add-opens java.base/java.util=ALL-UNNAMED --add-opens java.base/java.io=ALL-UNNAMED"
+  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-java@v2
+        with:
+          java-version: 17
+          distribution: "adopt"
+      - name: Test
+        run: |
+          cd code
+          mvn --batch-mode test
+  deploy:
+    if: github.ref == 'refs/heads/master' && github.repository_owner == 'Codeforces'
+    needs: test
+    runs-on: windows-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-java@v2
+        with:
+          java-version: "17"
+          distribution: "adopt"
+      - name: Deploy
+        run: |
+          cd code
+          mvn --batch-mode deploy -DskipTests

code/pom.xml

@@ -11,6 +11,14 @@
     <url>https://github.com/Codeforces/geoip</url>
     <description>geoip for Codeforces and related projects.</description>
 
+    <distributionManagement>
+        <repository>
+            <id>github</id>
+            <name>GitHub Packages</name>
+            <url>https://maven.pkg.github.com/Codeforces/geoip</url>
+        </repository>
+    </distributionManagement>
+
     <licenses>
         <license>
             <name>The MIT License (MIT)</name>