Build openpilot on mac in CI (#1792)

* build on mac in CI

* coreutils

* python stuff

* pipenv

* newer clang

* init pyenv

* verbose

* init pyenv

* install eigen

* ffmpeg

* sdl

* libav

* libtool

* glfw

* add pipfile as cache key

* test cache

* fix cache path

* brew link

* update tools readme

* don't cache on pipfile

* skip python install if installed

* unlink

* simpler cachingm

* here's your key

* cache pip too

* cache pyenv
old-commit-hash: c450110f961173302bec7873b81939f01d5ad1ac

.github/workflows/test.yaml

@@ -48,6 +48,31 @@ jobs:
                 scons -j$(nproc) && \
                 $UNIT_TEST selfdrive/car"
 
+  build_mac:
+    name: build macos
+    runs-on: macos-10.15
+    timeout-minutes: 35
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        submodules: true
+    - name: Cache dependencies
+      id: dependency-cache
+      uses: actions/cache@v2
+      with:
+        path: |
+          ~/.pyenv
+          ~/Library/Caches/pip
+          ~/Library/Caches/pipenv
+          ~/Library/Caches/Homebrew
+        key: ${{ hashFiles('tools/mac_setup.sh') }}
+    - name: Install dependencies
+      run: ./tools/mac_setup.sh
+    - name: Build openpilot
+      run: eval "$(pyenv init -)" && scons -j$(nproc)
+    - name: Brew cleanup
+      run: brew cleanup # keeps our cache small
+
   docker_push:
     name: docker push
     runs-on: ubuntu-16.04