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Contributing to Constellation

First, thank you for taking the time to contribute! 👍

We are happy to engage with the community and accept pull requests to make Constellation the best it can be.

The following is a set of guidelines for contributing to Constellation and its modules. These are not rules. Use your best judgment, and feel free to propose changes to this document in a pull request.

Table of Contents

Code of Conduct

I don’t want to read this whole thing, I just have a question!

What should I know before I get started?

How Can I Contribute?

Style Guides

Code of Conduct

This project and everyone participating in it is governed by the Constellation Code of Conduct. By participating, you are expected to uphold this code.

I don’t want to read this whole thing I just have a question!

Ask your question here

What should I know before I get started?

Constellation Core

This repository is sometimes referred to as the Core and can be treated like the framework you develop your functionality on top of within your own module suite.

The Core should only contain functionality that is domain agnostic. Functionality that is specific to a domain should be developed in a module that is in your own module suite.

Note that if some of the functionality you develop can be developed in a domain agnostic approach then you can contribute that functionality to Core and develop the domain specific functionality in your own module. Refer to the developer guide for information on how this is achieved.

Constellation Modules and Repositories

The Core is broken up into several modules which are logically grouped into components based on functionality. Refer to the component diagram below which depicts how the modules are grouped together:

Constellation Components

The Core was developed with the intention that developers could extend its functionality by implementing interfaces and using the Service Provider design pattern.

Constellation’s modular design technically provides you the ability to swap out modules with your own implementation of choice. For instance, you could replace the Core Table View module with your own implementation in your module and disable Core Table View via the Setup > Plugins > Installed option.

However, we would encourage effort be taken to instead improve the existing views and add extension points to address specific use cases.

Modules developed outside of the Core module suite would exist in their own module suite and would need to be hosted on a separate repository to Core.

A list of repositories containing modules that can be used by Constellation is available in the [Repositories Catalog][catalog-of-repositories]. If you have created a module suite dependant on Core then feel free to send a pull request to have your repository included in the catalog.

Design Decisions

When we make a significant decision in how we maintain the project and what we can or cannot support, we document the design decisions. If you have a question about how we do things, check if it is documented there. If it is not documented there, please open an issue and ask your question.

How Can I Contribute?

Reporting Bugs

This section guides you through submitting a bug report for Constellation. Following these guidelines helps maintainers and the community understand your report, reproduce the behaviour and find related reports.

Before creating bug reports, please check the issue tracker as it may already be reported. When you are creating a bug report, please include as many details as possible. Fill out the required template, the information it asks helps us resolve issues faster.

Note: If you find a Closed issue that seems like it is the same problem you’re experiencing, open a new issue and include a link to the original issue in the body of your new issue.

Before Submitting A Bug Report

  • Check whether the issue has already been reported in the issues page.

  • Double check whether the issue is a bug in this repository or from a module from [another repository][catalog-of-repositories] you have installed.

How Do I Submit A (Good) Bug Report?

Bugs are tracked as GitHub issues. After you’ve determined which repository your bug is related to, create an issue on that repository and provide the following information by filling in the template.

Explain the problem and include additional details to help maintainers reproduce the problem:

  • Use a clear and descriptive title for the issue to identify the problem.

  • Describe the exact steps which reproduce the problem in as many details as possible. For example, start by explaining how you started Constellation, e.g. which command exactly you used in the terminal, or how you started Constellation otherwise. When listing steps, don’t just say what you did, but explain how you did it. For example, if you created some nodes, did you use the import delimited file option, via the Rest API, Scripting View, create them using the edit mode, or another method?

  • Provide specific examples to demonstrate the steps. Include links to files or GitHub projects, or copy/paste snippets, which you use in those examples. If you’re providing snippets in the issue, use Markdown code blocks.

  • Describe the behaviour you observed after following the steps and point out what exactly is the problem with that behaviour.

  • Explain which behaviour you expected to see instead and why.

  • Include screenshots and animated GIFs which show you following the described steps and clearly demonstrate the problem. You can use this tool to record GIFs on macOS and Windows, and this tool for Linux.

  • If you’re reporting Constellation crashing, include a stack trace from the operating system. Include the crash report in the issue in a code block, a file attachment, or put it in a gist and provide a link to that gist.

  • If the problem is related to performance or memory, include a profile file generated via the Performance toolbar NetBeans button.

  • If the problem is related to graphics, include the output from Help > JOGL Version in a code block, a file attachment, or put it in a gist and provide a link to that gist.

  • If the problem wasn’t triggered by a specific action, describe what you were doing before the problem happened and share more information using the guidelines below.

Provide more context by answering these questions:

  • Did the problem start happening recently (e.g. after updating to a new version of Constellation) or was this always a problem?

  • If the problem started happening recently, can you reproduce the problem in an older version of Constellation? What’s the most recent version in which the problem doesn’t happen? You can download older versions of Constellation from the releases page.

  • Can you reliably reproduce the issue? If not, provide details about how often the problem happens and under which conditions it normally happens.

Include details about your configuration and environment (if you don’t wish to provide the Support Package):

  • Which version of Constellation are you using? You can get the exact version by looking at the version on the top left of the application title

  • What is the name and version of the OS you are using?

  • Are you running Constellation in a virtual machine? If so, which VM software are you using and which operating systems and versions are used for the host and the guest?

  • Which [packages][catalog-of-repositories] do you have installed? You can get that list by running Help > Module Versions.

  • Are you using Constellation with multiple monitors? If so, can you reproduce the problem when you use a single monitor?

Suggesting Enhancements

This section guides you through submitting an enhancement suggestion for Constellation, including completely new features and minor improvements to existing functionality. Following these guidelines helps maintainers and the community understand your suggestion and find related suggestions.

Before creating enhancement suggestions, please check the issue tracker as you might find that you don’t need to create one. When you are creating an enhancement suggestion, please include as many details as possible. Fill in the template, including the steps you imagine you would take if the feature you’re requesting existed.

Before Submitting An Enhancement Suggestion

  • Check whether the enhancement has already been reported in the issues page.

  • Double check whether the enhancement is a feature in this repository or from a module from [another repository][catalog-of-repositories] you have installed.

How Do I Submit A (Good) Enhancement Suggestion?

Enhancement suggestions are tracked as GitHub issues. After you’ve determined [which repository][catalog-of-repositories] your enhancement suggestion is related to, create an issue on that repository and provide the following information:

  • Use a clear and descriptive title for the issue to identify the suggestion.

  • Provide a step-by-step description of the suggested enhancement in as much detail as possible.

  • Provide specific examples to demonstrate the steps. Include copy/pasteable snippets which you use in those examples, as Markdown code blocks.

  • Describe the current behaviour and explain which behaviour you expected to see instead and why.

  • Include screenshots and animated GIFs which show you following the described steps and clearly demonstrate the problem. You can use this tool to record GIFs on macOS and Windows, and this tool on Linux.

  • Explain why this enhancement would be useful to most Constellation users and isn’t something that can or should be implemented as a [community package][catalog-of-repositories].

  • List some other applications where this enhancement exists.

  • Which version of Constellation are you using? You can get the exact version by looking at the version on the top left of the application title

  • Specify the name and version of the OS you’re using.

Your First Code Contribution

Unsure where to begin contributing to Constellation? You can start by looking through these beginner and help-wanted issues:

  • Beginner issues - issues which should only require a few lines of code, and a test or two.

  • Help wanted issues - issues which should be a bit more involved than beginner issues.

Both issue lists are sorted by total number of comments. While not perfect, the number of comments is a reasonable proxy for impact a given change will have.

If you want to read about developing modules for Constellation, please make sure you complete the self-paced Constellation Developer Guide.

Local development

Constellation Core and all packages can be developed locally. For instructions on how to do this, see the Build Constellation section in the Readme.

Pull Requests

  • Fill in the required template

  • Make sure your code compiles

  • Complete the check list

  • Include the copyright header

  • In NetBeans click on Tools -> Templates -> Settings

    user=PUT_YOUR_USER_HERE
licenseFirst=/*
licensePrefix=*
licenseLast=*/

  • In NetBeans click on Tools -> Templates -> Licenses -> Default License -> Open in Editor

    <#if licenseFirst??>
${licenseFirst}
</#if>
${licensePrefix}Copyright 2010-2024 Australian Signals Directorate
${licensePrefix}
${licensePrefix}Licensed under the Apache License, Version 2.0 (the "License");
${licensePrefix}you may not use this file except in compliance with the License.
${licensePrefix}You may obtain a copy of the License at
${licensePrefix}
${licensePrefix}    http://www.apache.org/licenses/LICENSE-2.0
${licensePrefix}
${licensePrefix}Unless required by applicable law or agreed to in writing, software
${licensePrefix}distributed under the License is distributed on an "AS IS" BASIS,
${licensePrefix}WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
${licensePrefix}See the License for the specific language governing permissions and
${licensePrefix}limitations under the License.
<#if licenseLast??>
${licenseLast}
</#if>

Git Commit Messages

  • Use the present tense (“Add feature” not “Added feature”)

  • Use the imperative mood (“Move cursor to…” not “Moves cursor to…”)

  • Limit the first line to 72 characters or less

  • Reference issues and pull requests liberally after the first line

  • Consider starting the commit message with an applicable emoji:

  • 🎨 :art: when improving the format/structure of the code

  • 🐎 :racehorse: when improving performance

  • 🚱 :non-potable_water: when plugging memory leaks

  • 📝 :memo: when writing docs

  • 🐧 :penguin: when fixing something on Linux

  • 🍎 :apple: when fixing something on macOS

  • 🏁 :checkered_flag: when fixing something on Windows

  • 🐛 :bug: when fixing a bug

  • 🔥 :fire: when removing code or files

  • 💚 :green_heart: when fixing the CI build

  • ✅ :white_check_mark: when adding tests

  • 🔒 :lock: when dealing with security

  • ⬆️ :arrow_up: when upgrading dependencies

  • ⬇️ :arrow_down: when downgrading dependencies

  • 👕 :shirt: when removing linter warnings

Test Requirements for Contributors

If you plan to contribute a pull request, you need to ensure your code is well tested. Please ensure your code has adequate test coverage and contains both unit and integration tests.

To make sure your changes work as intended and don’t break existing functionality, compile and run the existing Constellation tests and integration tests.

  • To run tests within your module, right click on the module from the Projects view and select Test.

  • To run all tests, right click on the CONSTELLATION_CORE module suite from the Projects view and select Test.

  • Push your changes to a Sonar Qube instance and make sure that you’re not introducing new leaks that don’t already exist. A good way to check this is to filter issues by your author name and date range.

Attribution to this guide

This contributing guide is adapted from the Atom Contributing Guide.