[kn-curl] with support for namespace and better help

plugins/kn-curl/LICENSE

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plugins/kn-curl/README.md

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+## kn-curl
+
+This plugins makes it easy to curl a Knative service.
+
+### Assumptions
+
+1.  Your Knative installation uses Istio for its mesh networking.
+2.  You follow the Dependencies listed below.
+3.  You don't have a custom domain for your services.
+
+### Dependencies
+
+1. Get the latest [`kn`](https://github.com/knative/client/releases) binary for 
+   your platform.
+2. Make sure the `kn-curl` BASH file is in your plugins directory (default
+   `~/.config/kn/plugins`). If you are using a custom plugins repository, then 
+   add it there.
+3. Make sure the `kn-curl` BASH file has executable permissions. You can achieve
+   this with `chmod +x kn-curl`.
+
+### Examples
+
+```bash
+# curl the service named hello
+kn curl hello
+```
+
+### Next steps
+
+1. Remove Istio assumption or at least deal with cases of non-istio Knative
+   deployments.
+2. Determine the domain and use that or default `example.com` if not set.
+3. Add e2e test for this BASH plugin.

plugins/kn-curl/e2e-test.sh

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+#!/bin/bash
+
+# Copyright © 2020 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.
+# 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.
+
+# Variables and defaults
+KN=`which kn`
+KUBECTL=`which kubectl`
+E2E_TEST_NS=$"kn-curl-e2e-tests"
+E2E_TEST_SERVICE_NAME=$"kn-curl-e2e-test-service"
+
+# Check that kn is in PATH
+check_kn_in_path() {
+  if [ -z "${KN_PATH}" ]; then
+    if [ -x "${KN}" ]; then
+      echo "✅ Found kn executable: $KN"
+    else
+      echo "🔥 Could not find kn executable, please add it to your PATH or set KN_PATH"
+      exit -1
+    fi
+  else
+    echo "✅ KN_PATH is set to: $KN_PATH"
+    export PATH=$KN_PATH:$PATH
+  fi
+}
+
+# Check that kubectl is in PATH
+check_kubectl_in_path() {
+  if [ -z "${KUBECTL_PATH}" ]; then
+    if [ -x "${KUBECTL}" ]; then
+      echo "✅ Found kubectl executable: $KUBECTL"
+    else
+      echo "🔥 Could not find kubectl executable, please add it to your PATH or set KUBECTL_PATH"
+      exit -1
+    fi
+  else
+    echo "✅ KUBECTL_PATH is set to: $KUBECTL_PATH"
+    export PATH=$KUBECTL_PATH:$PATH
+  fi
+}
+
+# Check kn and kubectl
+check_kn_in_path
+check_kubectl_in_path
+
+# Create e2e-test namespace
+kubectl create ns $E2E_TEST_NS
+
+# Check last call
+function check() {
+  if [ $? != 0 ]; then
+    echo "🔥 failed to $1"
+    exit 1
+  fi
+}
+
+# Start
+echo "🧪 start kn curl e2e tests"
+
+# Test 1: create public service
+kn service create $E2E_TEST_SERVICE_NAME --image knativesamples/helloworld --namespace $E2E_TEST_NS | check "create service"
+kn curl $E2E_TEST_SERVICE_NAME | check "curl public service"
+
+# Test 2: update servcie to private (cluster local) service
+kn service update $E2E_TEST_SERVICE_NAME --cluster-local --namespace $E2E_TEST_NS | check "update service to cluster_local"
+kn curl $E2E_TEST_SERVICE_NAME | check("curl private service")
+
+# Cleanup
+echo "🧹 cleanup"
+
+# Delete service
+kn service delete $E2E_TEST_SERVICE_NAME --namespace $E2E_TEST_NS | check "delete service"
+
+# Delete namespace
+kubectl delete ns $E2E_TEST_NS
+
+wait 2
+echo "✅ Success"
+exit 0