Fix CI issues for forked repos (#537)

* Fix CI issues for forked repos

Signed-off-by: Jason Hall <jasonhall@redhat.com>

* fix running e2e tests in PRs (and manually)

Signed-off-by: Jason Hall <jasonhall@redhat.com>

.github/workflows/e2e_tests.yml

@@ -15,20 +15,17 @@
 
 name: e2e-tests
 
-# Run this workflow every time a new commit pushed to your repository
-on: [push]
+# Run on every push and PR, and allow it to be run manually.
+on: [push, pull_request, workflow_dispatch]
 
 jobs:
-  # Set the job key. The key is displayed as the job name
-  # when a job name is not provided
   e2e-tests:
-    # Name the Job
+    # Skip if running in a fork that might not have secrets configured.
+    if: ${{ github.repository == 'sigstore/cosign' }}
     name: Run tests
-    # Set the type of machine to run on
     runs-on: ubuntu-latest
 
     steps:
-      # Checks out a copy of your repository on the ubuntu-latest machine
       - uses: actions/checkout@v2
       - uses: actions/setup-go@v2
         with:
@@ -39,12 +36,7 @@ jobs:
           project_id: projectsigstore
           service_account_key: ${{ secrets.GCP_CI_SERVICE_ACCOUNT }}
           export_default_credentials: true
-      - name: Install Crane
-        run: go install github.com/google/go-containerregistry/cmd/crane
-      - name: creds
-        run: gcloud auth configure-docker us-central1-docker.pkg.dev --quiet
-      # Required for `make cosign-pivkey`
-      # - name: deps
-      #   run: sudo apt-get update && sudo apt-get install -yq libpcsclite-dev
-      - name: Run e2e tests that need secrets
-        run: ./test/e2e_test_secrets.sh
+      - run: |
+          go install github.com/google/go-containerregistry/cmd/crane
+          gcloud auth configure-docker us-central1-docker.pkg.dev --quiet
+          ./test/e2e_test_secrets.sh