Accept triggering from GitHub event "pull_request"

README.md

@@ -27,14 +27,20 @@ sonar.sources=.
 The workflow, usually declared in `.github/workflows/build.yml`, looks like:
 
 ```yaml
-on: push
+on:
+  # Trigger analysis when pushing in master or pull requests, and when creating
+  # a pull request. 
+  push:
+    branches:
+      - master
+  pull_request:
+      types: [opened, synchronize, reopened]
 name: Main Workflow
 jobs:
-  sonarCloudTrigger:
-    name: SonarCloud Trigger
+  sonarcloud:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@master
+    - uses: actions/checkout@v2
     - name: SonarCloud Scan
       uses: sonarsource/sonarcloud-github-action@master
       env:

entrypoint.sh

@@ -17,14 +17,6 @@ if [[ -f "build.gradle" ]]; then
   exit 1
 fi
 
-if [[ "${GITHUB_EVENT_NAME}" == "pull_request" ]]; then
-  EVENT_ACTION=$(jq -r ".action" "${GITHUB_EVENT_PATH}")
-  if [[ "${EVENT_ACTION}" != "opened" ]]; then
-	  echo "No need to run analysis. It is already triggered by the push event."
-	  exit 78
-  fi
-fi
-
 if [[ -z "${SONARCLOUD_URL}" ]]; then
   SONARCLOUD_URL="https://sonarcloud.io"
 fi