Our project gladly welcomes external contributions!
A good way to familiarize yourself with the codebase and contribution process is to look for and tackle low-hanging fruit in the issue tracker. Before embarking on a more ambitious contribution, please quickly get in touch with us. Also, be sure to take a look at the ZenHub to get the full view of the issues and roadmap.
Note: We appreciate your effort, and want to avoid a situation where a contribution requires extensive rework (by you or by us), sits in backlog for a long time, or cannot be accepted at all!
If you would like to implement a new feature, please raise an issue before sending a pull request so the feature can be discussed. This is to avoid you wasting your valuable time working on a feature that the project developers are not interested in accepting into the code base.
If you would like to fix a bug, please raise an issue before sending a pull request so it can be tracked.
A pull request requires approval from at lesat two of the maintainers.
For a list of the maintainers, see the MAINTAINERS.md page.
Each source file must include a license header for the Apache Software License 2.0. Using the SPDX format is the simplest approach. e.g.
/*
* (C) Copyright <holder> <year of first update>[, <year of last update>]
*
* SPDX-License-Identifier: Apache-2.0
*/
We have tried to make it as easy as possible to make contributions. This applies to how we handle the legal aspects of contribution. We use the same approach - the Developer's Certificate of Origin 1.1 (DCO) - that the Linux® Kernel community uses to manage code contributions.
We simply ask that when submitting a patch for review, the developer must include a sign-off statement in the commit message.
Here is an example Signed-off-by line, which indicates that the submitter accepts the DCO:
Signed-off-by: John Doe <john.doe@example.com>
You can include this automatically when you commit a change to your local git repository using the following command:
git commit -s
To connect with us, please open an issue or contact one of the maintainers via email. See the MAINTAINERS.md page.
LinuxForHealth is requires Java 1.8 or higher and Gradle 6.x.
LinuxForHealth is currently built on:
Apache Camel for integration, supported by one of the most active development communities.
Kafka and NATS for world-class data streaming and messaging.
Standard data formats, including HL7 FHIR R4, HL7 MLLP and EDI, with easy extensiblity to support any format.
Instructions for developer setup can be found here.
To ensure a working build, please run the full build from the root of the project before submitting your pull request.
Formatting has not been strictly enforced, but we'd like to improve it over time, so please consider the following points as you change the code:
-
Write tests. Pull Requests should include necessary updates to unit tests (src/test/java of the corresponding project) and integration tests (in the fhir-server-test project)
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Use comments. Preferably javadoc.
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Keep the documentation up-to-date. Documentation updates require a pull request.
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Use spaces (not tabs) in java source. For this we have a checkstyle rule which will fail the build if you're using tabs. We also prefer spaces over tabs in JSON and XML, but its not strictly enforced.
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Use spaces after control flow keywords (they're not function calls!); if/for/while blocks should always have { }
Leave the code better than you found it.
LinuxForHealth is sublicensed by the Linux Foundation with Sublicense ID: 20200615-0008