Add Github Actions

.github/workflows/build.yml

@@ -0,0 +1,67 @@
+name: Build tests
+on:
+  - push
+env:
+  COMMON_ARGS: -DLIBICAL_BUILD_TESTING=True -DENABLE_GTK_DOC=True -DICAL_GLIB=True
+jobs:
+  build-windows:
+    strategy:
+      matrix:
+        configuration:
+          - Debug
+          - Release
+    runs-on: windows-2019
+    steps:
+      - uses: actions/checkout@v2
+      - run: call scripts\set_compiler_env.bat
+      - name: Configure project
+      - run: |
+          mkdir build 
+          cmake -B build --warn-uninitialized -Werror=dev -G Ninja -DLIBICAL_DEVMODE_MEMORY_CONSISTENCY=False -DCMAKE_BUILD_TYPE=${{ matrix.configuration }} $env:COMMON_ARGS  -DGOBJECT_INTROSPECTION=True -DICAL_GLIB_VAPI=True
+      - name: Build project
+        run: cmake -B build --build .
+      - name: Test project
+        run: cd build && ctest --test-dir .
+
+  build-ubuntu:
+    strategy:
+      matrix:
+        configuration:
+          - Debug
+          - Release
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install dependencies
+        run: sudo apt-get -y install gtk-doc-tools xml-core libdb-dev gobject-introspection libgirepository1.0-dev valac
+      - name: Configure project
+      - run: |
+          mkdir build
+          cmake -B build --warn-uninitialized -Werror=dev -G Ninja -DLIBICAL_DEVMODE_MEMORY_CONSISTENCY=False -DCMAKE_BUILD_TYPE=${{ matrix.configuration }} $COMMON_ARGS  -DGOBJECT_INTROSPECTION=True -DICAL_GLIB_VAPI=True
+      - name: Build project
+        run: cmake --build build
+      - name: Test project
+        run: cd build && ctest --test-dir .
+
+  build-macos:
+    strategy:
+      matrix:
+        configuration:
+          - Debug
+          - Release
+    runs-on: macos-12
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install dependencies
+      - run: brew install pkg-config ninja gtk-doc glib libxml2 icu4c berkeley-db
+      - name: Configure project
+      - run: |
+          export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig
+          export XML_CATALOG_FILES=/usr/local/etc/xml/catalog
+          mkdir build
+          cmake -B build --warn-uninitialized -Werror=dev -G Ninja -DLIBICAL_DEVMODE_MEMORY_CONSISTENCY=True -DCMAKE_BUILD_TYPE=${{ matrix.configuration }} $COMMON_ARGS -DGOBJECT_INTROSPECTION=False -DICAL_GLIB_VAPI=False
+      - name: Build project
+        run: cmake --build build
+      - name: Test project
+        run: cd build && ctest --test-dir .
+