Thanks for wanting to contribute to Home Manager! These are some guidelines to make the process as smooth as possible for both you and the Home Manager developers.
If you are only looking to report a problem then it is sufficient to read through the following section on reporting issues. If you instead want to directly contribute improvements and additions then please have a look at everything here.
If you notice a problem with Home Manager and want to report it then have a look among the already open issues, if you find one matching yours then feel free to comment on it to add any additional information you may have.
If no matching issue exists then go to the new issue page and write a description of your problem. Include as much information as you can, ideally also include relevant excerpts from your Home Manager configuration.
If you want to contribute code to improve Home Manager then please follow these guidelines.
If you have not previously forked Home Manager then you need to do that first. Have a look at GitHub's "Fork A Repo" for instructions on how to do this.
Once you have a fork of Home Manager you should create a branch
starting at the most recent master. Give your branch a reasonably
descriptive name. Perform your changes on this branch and when you are
happy with the result push the branch to GitHub and
create a pull request.
The commits in your pull request should be reasonably self-contained, that is, each commit should make sense in isolation. In particular, you will be asked to amend any commit that introduces syntax errors or similar problems even if they are fixed in a later commit.
The commit messages should follow the format
{component}: {description}
{long description}
where {component} refers to the code component (or module) your
change affects, {description} is a brief description of your change,
and {long description} is an optional clarifying description. Note,
{description} should start with a lower case letter. As a rare
exception, if there is no clear component, or your change affects many
components, then the {component} part is optional.
When adding a new module, say foo.nix, we use the fixed commit
format foo: add module. You can, of course, still include a long
description if you wish.
In addition to the above commit message guidelines, try to follow the seven rules as much as possible.
Home Manager includes a system for presenting news to the user. When making a change you, therefore, have the option to also include an associated news entry. In general, a news entry should only be added for truly noteworthy news. For example, a bug fix or new option does generally not need a news entry.
If you do have a change worthy of a news entry then please add one in
news.nix but you should follow some basic guidelines:
-
The entry timestamp should be in ISO-8601 format having "+00:00" as time zone. For example, "2017-09-13T17:10:14+00:00". A suitable timestamp can be produced by the command
date --iso-8601=second --universal -
The entry condition should be as specific as possible. For example, if you are changing or deprecating a specific option then you could restrict the news to those users who actually use this option.
-
Wrap the news message so that it will fit in the typical terminal, that is, at most 80 characters wide. Ideally a bit less.
-
Unlike commit messages, news will be read without any connection to the Home Manager source code. It is therefore important to make the message understandable in isolation and to those who do not have knowledge of the Home Manager internals. To this end it should be written in more descriptive, prose like way.
-
If you refer to an option then write its full attribute path. That is, instead of writing
The option 'foo' has been deprecated, please use 'bar' instead.
it should read
The option 'services.myservice.foo' has been deprecated, please use 'services.myservice.bar' instead.
-
A new module, say
foo.nix, should always include a news entry (without any condition) that has a message along the lines ofA new service is available: 'services.foo'.
or
A new program configuration is available: 'program.foo'.
depending on the type of module.