devex: add support for macOS in the CI

This is the core step towards making macOS officially-supported rather
than a bit of a second-class citizen.

Signed-off-by: Sam Stuewe <stuewe@mit.edu>

.github/workflows/macos-ci.yml

@@ -0,0 +1,61 @@
+name: CI
+
+on:
+  pull_request:
+    branches:
+      - trunk
+  push:
+    branches:
+      - trunk
+
+defaults:
+  run:
+    shell: bash
+
+env:
+  BUILD_DIR: x86_64
+
+jobs:
+  build-release:
+    name: Build Release Candidate
+    runs-on: macos-latest
+    env:
+      BUILD_RELEASE: 1
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: recursive
+      - name: Setup Build Env
+        run: ./scripts/install-build-tools.sh
+      - name: Setup Local Dependencies
+        run: ./scripts/setup-dependencies.sh
+      - name: Build
+        run: scripts/build.sh
+  unit-and-integration-test:
+    name: Unit and Integration Tests
+    runs-on: macos-latest
+    timeout-minutes: 30
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: recursive
+      - name: Setup Build Env
+        run: ./scripts/install-build-tools.sh
+      - name: Setup Local Dependencies
+        run: ./scripts/setup-dependencies.sh
+      - name: Build
+        run: scripts/build.sh
+      - name: Run Unit Tests
+        run: scripts/test.sh
+      - name: Shorten SHA
+        id: vars
+        run: echo "::set-output name=sha_short::$(git rev-parse --short HEAD)"
+      - uses: actions/upload-artifact@v2
+        if: ${{ !env.ACT }}
+        name: Archive Test Results
+        with:
+          name: Test Results for ${{ steps.vars.outputs.sha_short }}
+          path: |
+            ${{env.BUILD_DIR}}/unit_tests_coverage/output/*
+            ${{env.BUILD_DIR}}/integration_tests_coverage/output/*
+          retention-days: 7