Add Windows CI on GitHub Actions (#2286)

* Add GitHub Actions workflow for Windows CI

* Add Windows CI status badge

* Add vcpkg caching to GH Windows CI

* Fix test binary path in Windows CI

* Disable test step to populate cache

* Revert "Disable test step to populate cache"

This reverts commit 5b4fa49.

* Try to reduce warning output on MSVC

* drop: compile error on Windows

* Revert "drop: compile error on Windows"

This reverts commit e98c7af.

* test failure

* Revert "test failure"

This reverts commit caca4ab.

.github/workflows/windows.yml

@@ -0,0 +1,27 @@
+name: "Windows CI"
+on: push
+jobs:
+  build-test-windows:
+    name: "Build and Test on Windows"
+    runs-on: windows-2019
+    steps:
+      - name: "Checkout Repository"
+        uses: actions/checkout@v2
+        with:
+          submodules: true
+      - name: "Cache vcpkg binaries"
+        uses: actions/cache@v2
+        with:
+          path: ~\AppData\Local\vcpkg\archives
+          key: vcpkg-v1-${{ hashFiles('vcpkg.json') }}
+          restore-keys: vcpkg-v1-
+      - name: "Configure CMake"
+        run: cmake -S . -B .\build -G "Visual Studio 16 2019" \
+          -DCMAKE_TOOLCHAIN_FILE="$env:VCPKG_INSTALLATION_ROOT\scripts\buildsystems\vcpkg.cmake" \
+          -DCMAKE_BUILD_TYPE=Debug
+          -DTANGRAM_BUILD_TESTS=1
+      - name: "Run Build"
+        run: cmake --build .\build
+      - name: "Run Tests"
+        run: .\tests\Debug\tests.out.exe
+        working-directory: .\build

README.md

@@ -2,6 +2,7 @@ Tangram ES
 ==========
 
 [![CircleCI](https://circleci.com/gh/tangrams/tangram-es.svg?style=shield)](https://app.circleci.com/pipelines/github/tangrams/tangram-es)
+[![Windows CI](https://github.com/tangrams/tangram-es/actions/workflows/windows.yml/badge.svg)](https://github.com/tangrams/tangram-es/actions/workflows/windows.yml)
 [![Contributor Covenant](https://img.shields.io/badge/Contributor%20Covenant-v2.0%20adopted-ff69b4.svg)](CODE_OF_CONDUCT.md)
 
 Tangram ES is a C++ library for rendering 2D and 3D maps from vector data using OpenGL ES. It is a counterpart to [Tangram](https://github.com/tangrams/tangram).

core/deps/CMakeLists.txt

@@ -73,6 +73,10 @@ endif()
 set(GLM_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/glm)
 add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/alfons)
 target_compile_definitions(alfons PRIVATE GLM_FORCE_CTOR_INIT)
+if(MSVC)
+  # Use a lower warning level on MSVC because -Wall produces excessive output.
+  target_compile_options(alfons PUBLIC "/W1")
+endif()
 
 if (TANGRAM_MBTILES_DATASOURCE)
   ## SQLiteCpp ##