actions: add context example

actions/example-context/action-for-context/action.yml

@@ -0,0 +1,21 @@
+inputs:
+  input-one:
+    default: 'one'
+    description: 'description one'
+
+runs:
+  using: "composite"
+  steps:
+    - name: GITHUB_ACTION_REPOSITORY
+      run: |
+        set -x
+        test "$GITHUB_ACTION_REPOSITORY" = root/action-for-context
+        test "$GITHUB_ACTION_REPOSITORY" = "${{ env.GITHUB_ACTION_REPOSITORY }}"
+        touch /srv/example/example-context/GITHUB_ACTION_REPOSITORY
+
+    - name: GITHUB_ACTION_PATH
+      shell: bash
+      run: |
+        set -x
+        [[ "$GITHUB_ACTION_PATH" =~ action-for-context@main$ ]]
+        touch /srv/example/example-context/GITHUB_ACTION_PATH