Add github action workflow

Add a github action workflow similar to the previous travis workflow.
It is triggered on pull requests and push to the main branch.

.github/workflows/main.yml

@@ -0,0 +1,42 @@
+name: Main
+
+on:
+  pull_request:
+    types:
+      - opened
+      - synchronized
+      - reopened
+  push:
+    branches:
+      - main
+
+jobs:
+  linux:
+    name: Linux
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-java@v3
+        with:
+          java-version: '8'
+          distribution: 'temurin'
+          architecture: x64
+          cache: maven
+
+      - name: Download all dependencies
+        run: |
+          # Download all dependencies that integration tests might need later
+          ./mvnw -B -V -Dstyle.color=always dependency:go-offline -f src/it/dependencies/pom.xml -P protoc-3.4.0
+          ./mvnw -B -V -Dstyle.color=always dependency:go-offline -f src/it/dependencies/pom.xml -P protoc-3.11.1
+          ./mvnw -B -V -Dstyle.color=always dependency:go-offline -P run-its
+
+          # These protoc executables were downloaded in the previous phase and are being referenced in toolchains.xml
+          chmod +x $HOME/.m2/repository/com/google/protobuf/protoc/3.4.0/protoc-3.4.0-linux-x86_64.exe
+          chmod +x $HOME/.m2/repository/com/google/protobuf/protoc/3.11.1/protoc-3.11.1-linux-x86_64.exe
+
+      - name: Build and test
+        run: |
+          ./mvnw -B -V -t .github/workflows/toolschains-linux.xml -Dstyle.color=always clean verify -P run-its -Dinvoker.streamLogs=true
+

.travis/toolchains.xml → .github/workflows/toolchains-linux.xml

@@ -25,7 +25,7 @@
             <id>openjdk8</id>
         </provides>
         <configuration>
-            <jdkHome>/usr/lib/jvm/java-8-openjdk-amd64</jdkHome>
+            <jdkHome>${env.JAVA_HOME}</jdkHome>
         </configuration>
     </toolchain>
     <toolchain>
@@ -34,9 +34,7 @@
             <version>3.4.0</version>
         </provides>
         <configuration>
-            <protocExecutable>
-                /home/travis/.m2/repository/com/google/protobuf/protoc/3.4.0/protoc-3.4.0-linux-x86_64.exe
-            </protocExecutable>
+            <protocExecutable>${env.HOME}/.m2/repository/com/google/protobuf/protoc/3.4.0/protoc-3.4.0-linux-x86_64.exe</protocExecutable>
         </configuration>
     </toolchain>
     <toolchain>
@@ -45,9 +43,7 @@
             <version>3.11.1</version>
         </provides>
         <configuration>
-            <protocExecutable>
-                /home/travis/.m2/repository/com/google/protobuf/protoc/3.11.1/protoc-3.11.1-linux-x86_64.exe
-            </protocExecutable>
+            <protocExecutable>${env.HOME}/.m2/repository/com/google/protobuf/protoc/3.11.1/protoc-3.11.1-linux-x86_64.exe</protocExecutable>
         </configuration>
     </toolchain>
 </toolchains>