Choosealicense.com

Like a Choose Your Own Adventure site, but only much less interesting.

Intro

A lot of repositories on GitHub.com don't have a license. GitHub provides a license chooser, but if you don't know anything about licenses, how are you supposed to make an informed decision?

ChooseALicense.com is designed to help people make an informed decision about licenses by demystifying license choices through non-judgmental guidance.

Immediate Goals

Non-judgmental. Our goal is to help you find a license that meets your goals.
Well designed, but that goes without saying.
The homepage should have just enough to help 99% of folks make a decision.
For the 1%, the site will contain a list of licenses common to specific communities and situations.
Not comprehensive. Seems like an odd goal, but there are a bajillion licenses out there. We're going to have to filter that down to a small list of those that matter.

Run It On Your Machine

git clone https://github.com/github/choosealicense.com.git
cd choosealicense.com
script/bootstrap
script/server

Open http://localhost:4000 in your favorite browser.

Adding a license

For information on adding a license, see the CONTRIBUTING file.

License metadata

Licenses sit in the /_licenses folder. Each license has YAML front matter describing the license's properties. The body of the file contains the text of the license in plain text. The available metadata fields are:

Required fields

title - The license full name specified by http://spdx.org/licenses/
spdx-id - Short identifier specified by http://spdx.org/licenses/
source - The URL to the license source text
description - A human-readable description of the license
how - Instructions on how to implement the license
using - A list of 3 notable projects using the license with straightforward LICENSE files which serve as examples newcomers can follow and that can be detected by licensee in the form of project_name: license_file_url
permissions - Bulleted list of permission rules
conditions - Bulleted list of condition rules
limitations - Bulleted list of limitation rules

Optional fields

featured - Whether the license should be featured on the main page (defaults to false)
hidden - Whether the license is neither popular nor fills out the spectrum of licenses from strongly conditional to unconditional (defaults to true)
nickname - Customary short name if applicable (e.g, GPLv3)
note - Additional information about the licenses
redirect_from - Relative path(s) to redirect to the license from, to prevent breaking old URLs

Auto-populated fields

The licenses on choosealicense.com are regularly imported to GitHub.com to be used as the list of licenses available when creating a repository. When we create a repository, we will replace certain strings in the license with variables from the repository. These can be used to create accurate copyright notices. The available variables are:

Fields

fullname - The full name or username of the repository owner
login - The repository owner's username
email - The repository owner's primary email address
project - The repository name
description - The description of the repository
year - The current year

License properties

The license properties (rules) are stored as a bulleted list within the licenses YAML front matter. Each rule has a name e.g., include-copyright, a human-readable label, e.g., Copyright inclusion, and a description Include the original copyright with the code. To add a new rule, simply add it to _data/rules.yml and reference it in the appropriate license.

Rules

Permissions

commercial-use - This software and derivatives may be used for commercial purposes.
modifications - This software may be modified.
distribution - This software may be distributed.
private-use - This software may be used and modified in private.
patent-use - This license provides an express grant of patent rights from contributors.

Conditions

include-copyright - A copy of the license and copyright notice must be included with the software.
document-changes - Changes made to the code must be documented.
disclose-source - Source code must be made available when the software is distributed.
network-use-disclose - Users who interact with the software via network are given the right to receive a copy of the source code.
same-license - Modifications must be released under the same license when distributing the software. In some cases a similar or related license may be used.
same-license--file - Modifications of existing files must be released under the same license when distributing the software. In some cases a similar or related license may be used.
same-license--library - Modifications must be released under the same license when distributing the software. In some cases a similar or related license may be used, or this condition may not apply to works that use the software as a library.

Limitations

trademark-use - This license explicitly states that it does NOT grant trademark rights, even though licenses without such a statement probably do not grant any implicit trademark rights.
liability - This license includes a limitation of liability.
patent-use - This license explicitly states that it does NOT grant any rights in the patents of contributors.
warranty - The license explicitly states that it does NOT provide any warranty.

License

The content of this project itself is licensed under the Creative Commons Attribution 3.0 license, and the underlying source code used to format and display that content is licensed under the MIT license.

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