Contributing to WireCloud

Looking to contribute something to WireCloud? Here's how you can help.

Please take a moment to review this document in order to make the contribution process easy and effective for everyone involved.

Following these guidelines helps to communicate that you respect the time of the developers managing and developing this open source project. In return, they should reciprocate that respect in addressing your issue or assessing patches and features.


Using the issue tracker

The issue tracker is the preferred channel for bug reports and features requests, but please respect the following restrictions:

  • Please do not use the issue tracker for personal support requests. Stack Overflow (fiware-wirecloud tag) is a better place to get help.

  • Please do not derail or troll issues. Keep the discussion on topic and respect the opinions of others.

Bug reports

A bug is a demonstrable problem that is caused by the code in the repository. Good bug reports are extremely helpful, so thanks!

Guidelines for bug reports:

  1. Use the GitHub issue search — check if the issue has already been reported.

  2. Check if the issue has been fixed — try to reproduce it using the latest master or development branch in the repository.

  3. Isolate the problem — ideally create a reduced test case and a live example.

A good bug report shouldn't leave others needing to chase you up for more information. Please try to be as detailed as possible in your report. What is your environment? What steps will reproduce the issue? What browser(s) and OS experience the problem? Do other browsers show the bug differently? What would you expect to be the outcome? All these details will help people to fix any potential bugs.


Short and descriptive example bug report title

A summary of the issue and the browser/OS environment in which it occurs. If suitable, include the steps required to reproduce the bug.

  1. This is the first step
  2. This is the second step
  3. Further steps, etc.

<url> - a link to the reduced test case

Any other information you want to share that is relevant to the issue being reported. This might include the lines of code that you have identified as causing the bug, and potential solutions (and your opinions on their merits).

Feature requests

Feature requests are welcome. But take a moment to find out whether your idea fits with the scope and aims of the project. It's up to you to make a strong case to convince the project's developers of the merits of this feature. Please provide as much detail and context as possible.

Contributing code

If you're ready to take the plunge & contribute back some code/docs, the process should look like:

  • Fork the project on GitHub into your own account.
  • Clone your copy of WireCloud.
  • Make a new branch in git & commit your changes there.
  • Push your new branch up to GitHub.
  • Again, ensure there isn't already an issue or pull request out there on it. If there is & you feel you have a better fix, please take note of the issue number & mention it in your pull request.
  • Create a new pull request (based on your branch), including what the problem/feature is, versions of your software & referencing any related issues/pull requests.

In order to be merged into WireCloud, contributions should follow the following recommendation as much as possible:

  • A solid patch that:
  • A test case that demonstrates the previous flaw that now passes with the included patch.
  • If it adds/changes a public API, it must also include documentation for those changes.

You can manually test your changes by running WireCloud directly from the working copy source code repository. The provided file will use a shared security key and a basic configuration (e.g. using sqlite3) so it is not ready for a production environments, but can be used for simple manual tests. Those are the steps to be followed:

# Download your WireCloud repository

git clone${your_username}/wirecloud.git

# Enter into the source folder

cd wirecloud/src

# Install basic dependencies (see the installation guide, here are the ones for
# Debian/Ubuntu)

apt-get update
apt-get install python python-pip --no-install-recommends
apt-get install build-essential python-dev libxml2-dev libxslt1-dev zlib1g-dev libpcre3-dev libcurl4-openssl-dev libjpeg-dev
pip install -U pip setuptools

# Install WireCloud dependencies and WireCloud itself in development mode

python develop

# Install extra dependencies

pip install django-nose "mock>=1.0,<2.0"

# Init db

python migrate
python createsuperuser

# Execute the develpment server

python runserver

# Point your browser to http://localhost:8000

Code guidelines



  • Four spaces for indentation, never tabs.
  • strict mode.
  • "Attractive".
  • Use eslint (there is a .eslintrc file on the source code of WireCloud ;-).


  • Four spaces for indentation, never tabs.
  • Double quotes only, never single quotes.
  • Always use proper indentation.
  • Use tags and elements appropriate for an XHTML5 doctype (e.g., self-closing tags).


  • Multiple-line approach (one property and value per line).
  • Always a space after a property's colon (e.g., display: block; and not display:block;).
  • End all lines with a semi-colon.
  • Attribute selectors, like input[type="text"] should always wrap the attribute's value in double quotes, for consistency and safety (see this blog post on unquoted attribute values that can lead to XSS attacks).
  • Attribute selectors should only be used where absolutely necessary (e.g., form controls) and should be avoided on custom components for performance and explicitness.
  • Series of classes for a component should include a base class (e.g., .component) and use the base class as a prefix for modifier and sub-components (e.g., .component-lg).
  • Avoid inheritance and over nesting—use single, explicit classes whenever possible.
  • When feasible, default color palettes should comply with WCAG color contrast guidelines.
  • Except in rare cases, don't remove default :focus styles (via e.g. outline: none;) without providing alternative styles. See this A11Y Project post for more details.