| /* |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You 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. |
| */ |
| |
| package knative |
| |
| import "regexp" |
| |
| var channelRegexp = regexp.MustCompile("^knative:[/]*channel/([a-z0-9.-]+)(?:[/?].*|$)") |
| |
| // ExtractChannelNames extracts all Knative named channels from the given URIs |
| func ExtractChannelNames(uris []string) []string { |
| channels := make([]string, 0) |
| for _, uri := range uris { |
| channel := ExtractChannelName(uri) |
| if channel != "" { |
| channels = append(channels, channel) |
| } |
| } |
| return channels |
| } |
| |
| // ExtractChannelName returns a channel name from the Knative URI if present |
| func ExtractChannelName(uri string) string { |
| match := channelRegexp.FindStringSubmatch(uri) |
| if len(match) == 2 { |
| return match[1] |
| } |
| return "" |
| } |