build: add Steam workflow (#30)

Author: aarthificial

.github/workflows/steam.yml

@@ -0,0 +1,96 @@
+name: Release to Steam
+
+on: workflow_dispatch
+
+permissions:
+  contents: write
+
+jobs:
+  fmod:
+    name: Build FMOD
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          lfs: true
+      - uses: ./.github/actions/fmod
+      - uses: actions/upload-artifact@v3
+        with:
+          name: FMOD Build
+          path: .fmod/Build
+  build:
+    name: Build for ${{ matrix.targetPlatform }}
+    needs: [ release, fmod ]
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        targetPlatform:
+          - StandaloneWindows64
+          - StandaloneLinux64
+          - StandaloneOSX
+    outputs:
+      buildVersion: ${{ steps.build.outputs.buildVersion }}
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          lfs: true
+      - uses: actions/cache@v3
+        with:
+          path: Library
+          key: Library-${{ matrix.targetPlatform }}
+          restore-keys: Library-
+      - uses: actions/download-artifact@v3
+        with:
+          name: FMOD Build
+          path: .fmod/Build
+      - uses: game-ci/unity-builder@v2
+        env:
+          UNITY_LICENSE: ${{ secrets.UNITY_LICENSE }}
+          UNITY_EMAIL: ${{ secrets.UNITY_EMAIL }}
+          UNITY_PASSWORD: ${{ secrets.UNITY_PASSWORD }}
+        with:
+          gitPrivateToken: ${{ secrets.PACKAGES_TOKEN }}
+          unityVersion: 2022.3.6f1
+          targetPlatform: ${{ matrix.targetPlatform }}
+          versioning: Custom
+          version: ${{ needs.release.outputs.version }}
+          buildMethod: Editor.BuildScript.Build
+      - name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: Build-${{ matrix.targetPlatform }}
+          path: build/${{ matrix.targetPlatform }}
+  deployToSteam:
+    needs: [ build ]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: Download StandaloneWindows64 Artifact
+        uses: actions/download-artifact@v3
+        with:
+          name: Build-StandaloneWindows64
+          path: build/StandaloneWindows64
+      - name: Download StandaloneLinux64 Artifact
+        uses: actions/download-artifact@v3
+        with:
+          name: Build-StandaloneLinux64
+          path: build/StandaloneLinux64
+      - name: Download StandaloneOSX Artifact
+        uses: actions/download-artifact@v3
+        with:
+          name: Build-StandaloneOSX
+          path: build/StandaloneOSX
+      - uses: game-ci/steam-deploy@v3
+        with:
+          username: ${{ secrets.STEAM_USERNAME }}
+          configVdf: ${{ secrets.STEAM_CONFIG_VDF}}
+          appId: ${{ secrets.STEAM_APP_ID }}
+          buildDescription: v${{ needs.build.outputs.buildVersion }}
+          rootPath: build
+          depot1Path: StandaloneWindows64
+          depot2Path: StandaloneLinux64
+          depot3Path: StandaloneOSX
+          releaseBranch: prerelease