Setup github actions to build and test (#241)

.github/workflows/cmake-multi-platform.yml

@@ -0,0 +1,63 @@
+# This starter workflow is for a CMake project running on multiple platforms. There is a different starter workflow if you just want a single platform.
+# See: https://github.com/actions/starter-workflows/blob/main/ci/cmake-single-platform.yml
+name: CMake on multiple platforms
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      # Set fail-fast to false to ensure that feedback is delivered for all matrix combinations. Consider changing this to true when your workflow is stable.
+      fail-fast: false
+
+      # Set up a matrix to run the following 3 configurations:
+      # 1. <Windows, Release, latest MSVC compiler toolchain on the default runner image, default generator>
+      # 2. <Linux, Release, latest GCC compiler toolchain on the default runner image, default generator>
+      # 3. <Linux, Release, latest Clang compiler toolchain on the default runner image, default generator>
+      #
+      # To add more build types (Release, Debug, RelWithDebInfo, etc.) customize the build_type list.
+      matrix:
+        os: [ubuntu-latest]
+        build_type: [Release, Debug]
+        c_compiler: [clang]
+        include:
+          - os: ubuntu-latest
+            c_compiler: clang
+            cpp_compiler: clang++
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Install Ninja
+      run: sudo apt install -y ninja-build
+
+    - name: Set reusable strings
+      # Turn repeated input strings (such as the build output directory) into step outputs. These step outputs can be used throughout the workflow file.
+      id: strings
+      shell: bash
+      run: |
+        echo "build-output-dir=${{ github.workspace }}/build" >> "$GITHUB_OUTPUT"
+
+    - name: Configure CMake
+      # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
+      # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
+      run: >
+        cmake -B ${{ steps.strings.outputs.build-output-dir }}
+        -DCMAKE_CXX_COMPILER=${{ matrix.cpp_compiler }}
+        -DCMAKE_C_COMPILER=${{ matrix.c_compiler }}
+        -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
+        -DLIB_PROTO_MUTATOR_DOWNLOAD_PROTOBUF=ON
+        -GNinja
+        -S ${{ github.workspace }}
+
+    - name: Build
+      run: ninja -C ${{ steps.strings.outputs.build-output-dir }}
+
+    - name: Test
+      run: ninja -C ${{ steps.strings.outputs.build-output-dir }} check

README.md

@@ -1,5 +1,6 @@
 # libprotobuf-mutator
 
+[![Build Status](https://github.com/google/libprotobuf-mutator/actions/workflows/cmake-multi-platform.yml/badge.svg?event=push)](https://github.com/google/libprotobuf-mutator/actions/workflows/cmake-multi-platform.yml?query=event%3Apush)
 [![Fuzzing Status](https://oss-fuzz-build-logs.storage.googleapis.com/badges/libprotobuf-mutator.svg)](https://oss-fuzz-build-logs.storage.googleapis.com/index.html#libprotobuf-mutator)
 
 ## Overview