Add GitHub action for public api change

.devops/azure-pipelines.test-pr-hotchocolate.yml

@@ -34,16 +34,3 @@ stages:
             inputs:
               artifactName: test-results
               pathtoPublish: "output/test-results"
-      - job: CheckPublicApi
-        displayName: "Check public API"
-        dependsOn: [Test]
-        steps:
-          - task: UseDotNet@2
-            displayName: "Install .NET Core"
-            inputs:
-              packageType: 'sdk'
-              useGlobalJson: true
-          - task: CmdLine@2
-            displayName: "Check for undocumented public API changes"
-            inputs:
-              script: './build.cmd CheckPublicApi'

.github/workflows/check-public-api.yml

@@ -0,0 +1,17 @@
+name: check-public-api
+
+on: 
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  check-public-api:
+    name: "Check public API"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      # todo: this should get the SDK from global.json, not sure if it's working though
+      - uses: actions/setup-dotnet@v1
+      - run:  ./build.sh CheckPublicApi
+        name: "Check for undocumented public API changes"

API-Baselines.md

@@ -99,7 +99,7 @@ cp scripts/PublicAPI.empty.txt "src/$DIR/PublicAPI.Unshipped.txt"
 
 A PR to `main` will trigger a Pipeline job that runs this analyzer. Contrary to the development environment, where the analyzer only reports warnings, here it throws an error (This behavior is only true if the `RequireDocumentationOfPublicApiChanges` environment variable is set). This is done to enforce highlighting of public API changes.
 
-The job is defined as part of [this Pipeline definition](./.devops/azure-pipelines.test-pr-hotchocolate.yml). It can be easily disabled by adding `condition: false` to the `CheckPublicApi` section or commenting out the section.
+The job is defined as part of [this Pipeline definition](./.github/workflows/check-public-api.yml). It can be easily disabled by adding `condition: false` to the `CheckPublicApi` section or commenting out the section.
 
 ## Scripts