Add SonarCloud configuration

Author: nicolas-harraudeau-sonarsource

.github/workflows/build.yml

@@ -0,0 +1,20 @@
+name: Build
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    types: [opened, synchronize, reopened]
+jobs:
+  sonarcloud:
+    name: SonarCloud
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
+      - name: SonarCloud Scan
+        uses: SonarSource/sonarcloud-github-action@master
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}  # Needed to get PR information, if any
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}

sonar-project.properties

@@ -0,0 +1,13 @@
+# sonar.projectKey=python:plotly
+# sonar.projectName=python:plotly
+sonar.projectKey=nicolas-harraudeau-sonarsource_plotly.py
+sonar.organization=nicolas-harraudeau-sonarsource-g
+sonar.projectVersion=master
+sonar.links.scm=https://github.com/plotly/plotly.py
+
+sonar.sources=.
+sonar.tests=.
+sonar.test.inclusions=test/**,packages/**/tests/**
+
+# Disable duplication detection to speed up analysis. This should be removed in a real CI.
+sonar.cpd.exclusions=**/*