Resume the development of 1.18 for Operator (#1973)

Author: houshengbo

hack/boilerplate/boilerplate.go.txt

@@ -1,5 +1,5 @@
 /*
-Copyright 2023 The Knative Authors
+Copyright 2025 The Knative Authors
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.

hack/boilerplate/boilerplate.sh.txt

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# Copyright 2023 The Knative Authors
+# Copyright 2025 The Knative Authors
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

test/e2e-common.sh

@@ -18,14 +18,14 @@
 source "$(dirname "${BASH_SOURCE[0]}")/../vendor/knative.dev/hack/e2e-tests.sh"
 
 # The previous serving release, installed by the operator. This value should be in the semantic format of major.minor.
-readonly PREVIOUS_SERVING_RELEASE_VERSION="1.16"
+readonly PREVIOUS_SERVING_RELEASE_VERSION="1.17"
 # The previous eventing release, installed by the operator. This value should be in the semantic format of major.minor.
-readonly PREVIOUS_EVENTING_RELEASE_VERSION="1.16"
+readonly PREVIOUS_EVENTING_RELEASE_VERSION="1.17"
 # The target serving/eventing release to upgrade, installed by the operator. It can be a release available under
 # kodata or an incoming new release. This value should be in the semantic format of major.minor.
-readonly TARGET_RELEASE_VERSION="1.17"
+readonly TARGET_RELEASE_VERSION="latest"
 # This is the branch name of knative repos, where we run the upgrade tests.
-readonly KNATIVE_REPO_BRANCH="release-1.17"
+readonly KNATIVE_REPO_BRANCH="${PULL_BASE_REF}"
 # Namespaces used for tests
 # This environment variable TEST_NAMESPACE defines the namespace to install Knative Serving.
 export TEST_NAMESPACE="${TEST_NAMESPACE:-knative-operator-testing}"