Simplify unity-actions workflow (#1)

* Simplify unity-actions workflow

* Remove WebGL from build as it's currently failing

* Trigger builds on main branch push

This is tricky. I wish we could trigger on all branches push, but it seems like internal PRs are run twice when using this:

```yaml

on:
  pull_request: {}
  push: {}
```

So specifying a branch is a bit better somehow. Related discussions:
* https://github.community/t/how-to-run-a-workflow-only-once-even-when-triggered-mutliple-times/16436
* https://github.community/t/how-to-trigger-an-action-on-push-or-pull-request-but-not-both/16662

.github/workflows/main.yml

@@ -1,4 +1,4 @@
-name: Actions 😎
+name: Unity Actions
 
 on:
   pull_request: {}
@@ -6,18 +6,76 @@ on:
 
 env:
   UNITY_LICENSE: ${{ secrets.UNITY_LICENSE }}
+  UNITY_VERSION: 2020.1.7f1
+  PROJECT_PATH: .
 
 jobs:
-  buildAndTestForSomePlatforms:
+  checklicense:
+    name: check if UNITY_LICENSE is set in github secrets
+    runs-on: ubuntu-latest
+    outputs:
+      is_unity_license_set: ${{ steps.checklicense_job.outputs.is_unity_license_set }}
+    steps:
+      - name: Check whether unity activation requests should be done
+        id: checklicense_job
+        run: |
+            echo "Skip activation job: ${{ env.UNITY_LICENSE != '' }}"
+            echo "::set-output name=is_unity_license_set::${{ env.UNITY_LICENSE != '' }}"
+  activation:
+    needs: [checklicense]
+    if: needs.checklicense.outputs.is_unity_license_set == 'false'
+    name: Request activation file 🔑
+    runs-on: ubuntu-latest
+    steps:
+      # Request manual activation file
+      - name: Request manual activation file
+        id: getManualLicenseFile
+        uses: webbertakken/unity-request-manual-activation-file@master
+        with:
+          unityVersion: ${{ env.UNITY_VERSION }}
+      # Upload artifact (Unity_v20XX.X.XXXX.alf)
+      - name: Expose as artifact
+        uses: actions/upload-artifact@v1
+        with:
+          name: ${{ steps.getManualLicenseFile.outputs.filePath }}
+          path: ${{ steps.getManualLicenseFile.outputs.filePath }}
+
+  test:
+    needs: [checklicense]
+    if: needs.checklicense.outputs.is_unity_license_set == 'true'
+    name: Test all modes ✨
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          lfs: true
+      - uses: actions/cache@v1.1.0
+        with:
+          path: Library
+          key: Library-test-project-${{ matrix.targetPlatform }}
+          restore-keys: |
+            Library-test-project-
+            Library-
+      - uses: webbertakken/unity-test-runner@v1.7
+        id: testRunner
+        with:
+          projectPath: ${{ env.PROJECT_PATH }}
+          unityVersion: ${{ env.UNITY_VERSION }}
+          testMode: all
+          customParameters: "-nographics"
+      - uses: actions/upload-artifact@v1
+        with:
+          name: Test results (all modes)
+          path: ${{ steps.testRunner.outputs.artifactsPath }}
+
+  build:
+    needs: [checklicense]
+    if: needs.checklicense.outputs.is_unity_license_set == 'true'
     name: Build for ${{ matrix.targetPlatform }} on version ${{ matrix.unityVersion }}
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        projectPath:
-          - .
-        unityVersion:
-          - 2020.1.7f1
         targetPlatform:
           - StandaloneOSX
           - StandaloneWindows64
@@ -33,21 +91,12 @@ jobs:
           restore-keys: |
             Library-${{ matrix.projectPath }}-
             Library-
-#      - uses: webbertakken/unity-test-runner@master
-#        id: testRunner
-#        with:
-#          projectPath: ${{ matrix.projectPath }}
-#          unityVersion: ${{ matrix.unityVersion }}
-#      - uses: actions/upload-artifact@v1
-#        with:
-#          name: Test results (all modes)
-#          path: ${{ steps.testRunner.outputs.artifactsPath }}
-      - uses: webbertakken/unity-builder@master
+      - uses: webbertakken/unity-builder@v1.4
         with:
-          projectPath: ${{ matrix.projectPath }}
-          unityVersion: ${{ matrix.unityVersion }}
+          projectPath: ${{ env.PROJECT_PATH }}
+          unityVersion: ${{ env.UNITY_VERSION }}
           targetPlatform: ${{ matrix.targetPlatform }}
-          customParameters: '-nographics'
+          customParameters: "-nographics"
       - uses: actions/upload-artifact@v1
         with:
           name: Build

.github/workflows/manual_activation.yml

@@ -1,28 +0,0 @@
-name: Acquire activation file
-on:
-#uncomment this to make it show once, stop the job in github actions, comment it again, then run using the "Run workflow" button and fill the form with desired unity version 
-#  push: { branches: [main] }
-
-  workflow_dispatch:
-    inputs:
-      unityVersion:
-        description: 'Unity version to use during activation request'
-        required: true
-        default: 2020.1.7f1
-jobs:
-  activation:
-    name: Request manual activation file 🔑
-    runs-on: ubuntu-latest
-    steps:
-      # Request manual activation file
-      - name: Request manual activation file
-        id: getManualLicenseFile
-        uses: webbertakken/unity-request-manual-activation-file@master
-        with:
-          unityVersion: ${{ github.event.inputs.unityVersion }}
-      # Upload artifact (Unity_v20XX.X.XXXX.alf)
-      - name: Expose as artifact
-        uses: actions/upload-artifact@v1
-        with:
-          name: ${{ steps.getManualLicenseFile.outputs.filePath }}
-          path: ${{ steps.getManualLicenseFile.outputs.filePath }}