Add GitHub CI workflow

.config/dotnet-tools.json

@@ -9,13 +9,13 @@
       ]
     },
     "jetbrains.resharper.globaltools": {
-      "version": "2021.1.3",
+      "version": "2022.1.2",
       "commands": [
         "jb"
       ]
     },
     "nvika": {
-      "version": "2.0.0",
+      "version": "3.0.0",
       "commands": [
         "nvika"
       ]

.github/workflows/ci.yml

@@ -0,0 +1,54 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  inspect-code:
+    name: Code Quality
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      # FIXME: Tools won't run in .NET 6.0 unless you install 3.1.x LTS side by side.
+      # https://itnext.io/how-to-support-multiple-net-sdks-in-github-actions-workflows-b988daa884e
+      - name: Install .NET 3.1.x LTS
+        uses: actions/setup-dotnet@v1
+        with:
+          dotnet-version: "3.1.x"
+
+      - name: Install .NET 6.0.x
+        uses: actions/setup-dotnet@v1
+        with:
+          dotnet-version: "6.0.x"
+
+      - name: Restore Tools
+        run: dotnet tool restore
+
+      - name: Restore Packages
+        run: dotnet restore
+
+      - name: CodeFileSanity
+        run: |
+          # TODO: Add ignore filters and GitHub Workflow Command Reporting in CFS. That way we don't have to do this workaround.
+          # FIXME: Suppress warnings from templates project
+          exit_code=0
+          while read -r line; do
+            if [[ ! -z "$line" ]]; then
+              echo "::error::$line"
+              exit_code=1
+            fi
+          done <<< $(dotnet codefilesanity)
+          exit $exit_code
+
+      - name: InspectCode
+        run: dotnet jb inspectcode $(pwd)/osu.Tools.sln --build --output="inspectcodereport.xml" --verbosity=WARN
+
+      - name: NVika
+        run: dotnet nvika parsereport "${{github.workspace}}/inspectcodereport.xml" --treatwarningsaserrors