switch back to requiring a separate checkout step

Author: keewis

README.md

@@ -12,6 +12,9 @@ To use the detect-ci-trigger action in workflows, add a new job:
     outputs:
       triggered: ${{ steps.detect-trigger.outputs.trigger-found }}
     steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 2
     - uses: keewis/ci-trigger@v1
       id: detect-trigger
       with:

action.yml

@@ -14,13 +14,6 @@ outputs:
 runs:
   using: "composite"
   steps:
-    - name: checkout the repository
-      run: |
-        echo "repo: $GITHUB_REPOSITORY"
-        echo "workspace: $GITHUB_WORKSPACE"
-        echo "current directory: $PWD"
-        ls -lA $GITHUB_WORKSPACE
-      shell: bash
     - name: detect trigger
       id: detect-trigger
       run: |