test(fn-eval): update fn eval E2E tests to use :latest set-namespace

This PR updates the kpt fn eval E2E test suite to use the :latest version of the set-namespace function.

Key changes:

- Add isUnknown() heuristic in internal/kptops/set-namespace.go to detect Custom Resources by API group, skipping namespace for unknown CRs without existing namespace

- Update Kptfile references from pinned set-namespace image tags to :latest (ghcr.io/kptdev/krm-functions/set-namespace:latest)

- Update .expected/ golden files to reflect new :latest behavior

- Add .gitattributes to force LF for *.sh and CRLF for *.bat/*.cmd, preventing bash errors in CI

- Update internal/fnruntime/runner_test.go to align with new function behavior

Part 1 of 2 from the original PR #4420 (fn-eval portion).

Signed-off-by: Surbhi <agarwalsurbhi1807@gmail.com>

Author: SurbhiAgarwal1

.gitattributes

@@ -0,0 +1,9 @@
+# Set default behavior to automatically normalize line endings
+* text=auto
+
+# Force bash scripts to always use LF line endings
+*.sh text eol=lf
+
+# Force batch scripts to always use CRLF line endings
+*.bat text eol=crlf
+*.cmd text eol=crlf

e2e/testdata/fn-eval/fn-config-file-in-pkg/.expected/config.yaml

@@ -13,5 +13,5 @@
 # limitations under the License.
 
 testType: eval
-image: ghcr.io/kptdev/krm-functions-catalog/set-namespace:v0.2.0
+image: ghcr.io/kptdev/krm-functions-catalog/set-namespace:latest
 fnConfig: ../config.yaml

e2e/testdata/fn-eval/fn-config-file/pkg/.expected/config.yaml

@@ -13,5 +13,5 @@
 # limitations under the License.
 
 testType: eval
-image: ghcr.io/kptdev/krm-functions-catalog/set-namespace:v0.2.0
+image: ghcr.io/kptdev/krm-functions-catalog/set-namespace:latest
 fnConfig: ../../config.yaml

e2e/testdata/fn-eval/fn-success-with-stderr/pkg/.expected/diff.patch

@@ -0,0 +1,57 @@
+diff --git a/resources.yaml b/resources.yaml
+index 9d1f786..f2eec52 100644
+--- a/resources.yaml
++++ b/resources.yaml
+@@ -1,26 +1,26 @@
+-# Copyright 2021 The kpt Authors
+-#
+-# Licensed under the Apache License, Version 2.0 (the "License");
+-# you may not use this file except in compliance with the License.
+-# You may obtain a copy of the License at
+-#
+-#      http://www.apache.org/licenses/LICENSE-2.0
+-#
+-# Unless required by applicable law or agreed to in writing, software
+-# distributed under the License is distributed on an "AS IS" BASIS,
+-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-# See the License for the specific language governing permissions and
+-# limitations under the License.
+-apiVersion: apps/v1
+-kind: Deployment
+-metadata:
+-  name: nginx-deployment
+-spec:
+-  replicas: 3
+----
+-apiVersion: custom.io/v1
+-kind: Custom
+-metadata:
+-  name: custom
+-spec:
+-  image: nginx:1.2.3
++# Copyright 2021 The kpt Authors
++#
++# Licensed under the Apache License, Version 2.0 (the "License");
++# you may not use this file except in compliance with the License.
++# You may obtain a copy of the License at
++#
++#      http://www.apache.org/licenses/LICENSE-2.0
++#
++# Unless required by applicable law or agreed to in writing, software
++# distributed under the License is distributed on an "AS IS" BASIS,
++# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
++# See the License for the specific language governing permissions and
++# limitations under the License.
++apiVersion: apps/v1
++kind: Deployment
++metadata:
++  name: nginx-deployment
++spec:
++  replicas: 3
++---
++apiVersion: custom.io/v1
++kind: Custom
++metadata:
++  name: custom
++spec:
++  image: nginx:1.2.3

e2e/testdata/fn-eval/fnconfig-missing-name/pkg/.expected/config.yaml

@@ -13,7 +13,7 @@
 # limitations under the License.
 
 testType: eval
-image: ghcr.io/kptdev/krm-functions-catalog/set-namespace:v0.2.0
+image: ghcr.io/kptdev/krm-functions-catalog/set-namespace:latest
 fnConfig: ../../config.yaml
 exitCode: 1
 stdErr: "resource must have `metadata.name`"

e2e/testdata/fn-eval/include-meta-resources-v1alpha1/.expected/config.yaml

@@ -14,7 +14,7 @@
 
 runCount: 2
 testType: eval
-image: ghcr.io/kptdev/krm-functions-catalog/set-namespace:v0.2.0
+image: ghcr.io/kptdev/krm-functions-catalog/set-namespace:latest
 includeMetaResources: true
 exitCode: 1
 args:

e2e/testdata/fn-eval/include-meta-resources-v1alpha2/.expected/config.yaml

@@ -14,7 +14,7 @@
 
 runCount: 2
 testType: eval
-image: ghcr.io/kptdev/krm-functions-catalog/set-namespace:v0.2.0
+image: ghcr.io/kptdev/krm-functions-catalog/set-namespace:latest
 includeMetaResources: true
 exitCode: 1
 args:

e2e/testdata/fn-eval/include-meta-resources/.expected/config.yaml

@@ -14,7 +14,7 @@
 
 runCount: 2
 testType: eval
-image: ghcr.io/kptdev/krm-functions-catalog/set-namespace:v0.2.0
+image: ghcr.io/kptdev/krm-functions-catalog/set-namespace:latest
 includeMetaResources: true
 exitCode: 1
 args:

e2e/testdata/fn-eval/invalid-fn-config-file/pkg/.expected/config.yaml

@@ -14,6 +14,6 @@
 
 testType: eval
 exitCode: 1
-image: ghcr.io/kptdev/krm-functions-catalog/set-namespace:v0.2.0
+image: ghcr.io/kptdev/krm-functions-catalog/set-namespace:latest
 fnConfig: ../../config.yaml
 stdErr: "wrong node kind: expected MappingNode but got ScalarNode: node contents:\nI am not a valid config file\n"

e2e/testdata/fn-eval/missing-fn-config/.expected/config.yaml

@@ -14,5 +14,5 @@
 
 testType: eval
 exitCode: 1
-image: ghcr.io/kptdev/krm-functions-catalog/set-namespace:v0.2.0
+image: ghcr.io/kptdev/krm-functions-catalog/set-namespace:latest
 stdErr: "failed to configure function: input namespace cannot be empty"