Create snapshot

Author: shuzijun

.github/workflows/snapshot.yml

@@ -0,0 +1,52 @@
+name: Snapshot
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  greet:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+    
+    - name: Set LD_VERSION
+      run: echo ::set-env name=LD_VERSION::0.0
+    
+    - name: Set up JDK 1.8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 1.8
+    
+    - name: Grant execute permission for gradlew
+      run: chmod +x gradlew
+    
+    - name: Build the plugin
+      run: ./gradlew buildPlugin
+      env:
+        LD_VERSION: ${{ env.LD_VERSION }} 
+    
+    - name: Verify plugin
+      id: verify
+      uses: ChrisCarini/intellij-platform-plugin-verifier-action@latest
+      with:
+        ide-versions: |
+          ideaIC:2019.3
+          ideaIC:2020.1
+          ideaIC:2020.2
+          ideaIC:LATEST-EAP-SNAPSHOT
+    
+    - name: Print verify contents
+      run: |
+        echo "The log file path is: ${{steps.verify.outputs.verification-output-log-filename}}" ;
+        cat ${{steps.verify.outputs.verification-output-log-filename}}
+    
+    - name: Upload Artifact
+      uses: actions/upload-artifact@v2
+      with:
+        # TODO: This uploads a zip called `distributions`; see what we can do to just upload the produced plugin itself.
+        name: leetcode-editor-snapshot
+        path: build/distributions/leetcode-editor-${{ env.LD_VERSION }}.zip