mirror of https://github.com/apache/druid.git
128 lines
5.7 KiB
Markdown
128 lines
5.7 KiB
Markdown
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~ Licensed to the Apache Software Foundation (ASF) under one
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~ or more contributor license agreements. See the NOTICE file
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~ distributed with this work for additional information
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~ regarding copyright ownership. The ASF licenses this file
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## License management
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[All Apache projects are required to provide the `LICENSE` and `NOTICE` files](https://infra.apache.org/licensing-howto.html).
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This document explains how we manage the license of Druid and the libraries that Druid uses.
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When we do a new release, we distribute 2 packages, i.e., source code package and binary package. Since the binary package
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includes not only Druid itself but also all the dependencies of Druid, its `LICENSE` and `NOTICE` files should cover those dependencies as well.
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As a result, the contents of those files are different and managed separately for source code and binary packages.
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Please read the sections below to understand how we manage the licenses and what to update when you want to add new dependencies.
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### Licenses for source code packages
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The licenses for source code packages are maintained _manually_ in [the `LICENSE` file](https://github.com/apache/druid/blob/master/LICENSE).
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The notices can be found in [the `NOTICE` file`](https://github.com/apache/druid/blob/master/NOTICE) similarly.
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### Licenses for binary packages
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The licenses for binary packages are maintained _automatically_.
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All licenses (for both source code and binary releases) should be registered in [the `licenses.yaml` file](https://github.com/apache/druid/blob/master/licenses.yaml).
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[`generate-binary-license.py`](https://github.com/apache/druid/blob/master/distribution/bin/generate-binary-license.py)
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and [`generate-binary-notice.py`](https://github.com/apache/druid/blob/master/distribution/bin/generate-binary-notice.py)
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will generate the `LICENSE` and `NOTICE` files automatially based on the registry.
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### Adding licenses
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#### When you adopt source codes from other projects into Druid
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This requires you to update the license and notice for both source code and binary packages.
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First, you should add a new entry in the [`LICENSE`]((https://github.com/apache/druid/blob/master/LICENSE)) for the dependency you are adding.
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For example, [the `CalciteCnfHelper` class](https://github.com/apache/druid/blob/master/processing/src/main/java/org/apache/druid/segment/filter/cnf/CalciteCnfHelper.java)
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is adopted from Apache Calcite. This requires adding the following entries in the `LICENSE` file.
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```
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SOURCE/JAVA-CORE
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This product contains SQL query planning code adapted from Apache Calcite.
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* processing/src/main/java/org/apache/druid/segment/filter/cnf/CalciteCnfHelper.java
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```
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If the project provides its own notice, the contents of the notice should be included in the `NOTICE` file of Druid.
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> **NOTE:** Most projects don't provide notice. If you are not sure whether you need to add a notice, then you probably
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> don't have to unless the dependency you are adding is an Apache project.
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Going back to the example of Apache Calcite, since all Apache projects provide the `NOTICE` file, you should add the
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following in the [`NOTICE`](https://github.com/apache/druid/blob/master/NOTICE) file.
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```
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############ SOURCE/JAVA-CORE ############
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================= Apache Calcite 1.10.0 =================
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Apache Calcite
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Copyright 2012-2016 The Apache Software Foundation
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This product is based on source code originally developed
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by DynamoBI Corporation, LucidEra Inc., SQLstream Inc. and others
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under the auspices of the Eigenbase Foundation
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and released as the LucidDB project.
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```
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Second, you also need to add a new entry in [the `licenses.yaml` file](https://github.com/apache/druid/blob/master/licenses.yaml)
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as below.
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```yaml
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name: SQL query planning code adapted from Apache Calcite
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license_category: source
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module: java-core
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license_name: Apache License version 2.0
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source_paths:
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- processing/src/main/java/org/apache/druid/segment/filter/cnf/CalciteCnfHelper.java
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```
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#### When you add a new library dependency into Druid
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This requires you to update the [the `licenses.yaml` file](https://github.com/apache/druid/blob/master/licenses.yaml).
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For example, to add `aws-java-sdk-core` as a new depdency, you need to add the following entry.
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```yaml
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name: AWS SDK for Java
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license_category: binary
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module: java-core
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license_name: Apache License version 2.0
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version: 1.11.199
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libraries:
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- com.amazonaws: aws-java-sdk-core
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notice: |
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AWS SDK for Java
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Copyright 2010-2014 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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This product includes software developed by
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Amazon Technologies, Inc (http://www.amazon.com/).
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**********************
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THIRD PARTY COMPONENTS
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**********************
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This software includes third party software subject to the following copyrights:
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- XML parsing and utility functions from JetS3t - Copyright 2006-2009 James Murty.
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- PKCS#1 PEM encoded private key parsing and utility functions from oauth.googlecode.com - Copyright 1998-2010 AOL Inc.
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The licenses for these third party components are included in LICENSE.txt
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```
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### Updating licenses
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When you update the version of existing dependencies, you need to update the version not only in the `pom.xml` file but
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also in the `licenses.yaml` file. |