| //// |
| 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 |
| |
| https://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. |
| //// |
| |
| = namespaces |
| |
| *Tag:* namespaces |
| |
| [ivysettings.namespaces]#Namespaces are an advanced feature of Ivy which let you use resolvers in which module names and organisations are not consistent between each other.# |
| |
| For instance, if you want to use both a Maven 2 repository and an ivyrep, you will face some naming issues. For example, all Apache Commons projects are declared to be part of the organisation __apache__ in ivyrep whereas in Maven 2 ibiblio repository, their organisation is same as the module. |
| |
| So if you try to use both Maven 2 and ivyrep repositories, you will face some issues like: |
| [quote] |
| _______ |
| How do I declare a dependency on commons-lang? |
| I have an error while trying to resolve module xxx. It says that it depends on [commons-httpclient commons-httpclient] and that it isn't available. |
| _______ |
| |
| Ivy's answer to this issue is called namespaces. In short, you can attach a namespace to each dependency resolver in Ivy, and each namespace defines rules to convert names from the system namespace to the defined namespace itself, and vice versa. |
| |
| This very powerful feature is thoroughly used in the link:../tutorial/build-repository/advanced.html[build your own repository tutorial], so is the best place to see an example of what can be done with namespaces. |
| |
| |
| == Child elements |
| |
| |
| [options="header"] |
| |======= |
| |Element|Description|Cardinality |
| |link:../settings/namespace{outfilesuffix}[namespace]|defines a new namespace|0..n |
| |======= |