213 lines
8.1 KiB
Markdown
213 lines
8.1 KiB
Markdown
# Contributing to Rust
|
||
|
||
Thank you for your interest in contributing to Rust! There are many ways to
|
||
contribute, and we appreciate all of them. This document is a bit long, so here's
|
||
links to the major sections:
|
||
|
||
* [Feature Requests](#feature-requests)
|
||
* [Bug Reports](#bug-reports)
|
||
* [Pull Requests](#pull-requests)
|
||
* [Writing Documentation](#writing-documentation)
|
||
* [Issue Triage](#issue-triage)
|
||
* [Out-of-tree Contributions](#out-of-tree-contributions)
|
||
|
||
If you have questions, please make a post on [internals.rust-lang.org][internals] or
|
||
hop on [#rust-internals][pound-rust-internals].
|
||
|
||
As a reminder, all contributors are expected to follow our [Code of Conduct][coc].
|
||
|
||
[pound-rust-internals]: http://chat.mibbit.com/?server=irc.mozilla.org&channel=%23rust-internals
|
||
[internals]: http://internals.rust-lang.org
|
||
[coc]: http://www.rust-lang.org/conduct.html
|
||
|
||
## Feature Requests
|
||
|
||
To request a change to the way that the Rust language works, please open an
|
||
issue in the [RFCs repository](https://github.com/rust-lang/rfcs/issues/new)
|
||
rather than this one. New features and other significant language changes
|
||
must go through the RFC process.
|
||
|
||
## Bug Reports
|
||
|
||
While bugs are unfortunate, they're a reality in software. We can't fix what we
|
||
don't know about, so please report liberally. If you're not sure if something
|
||
is a bug or not, feel free to file a bug anyway.
|
||
|
||
If you have the chance, before reporting a bug, please [search existing
|
||
issues](https://github.com/rust-lang/rust/search?q=&type=Issues&utf8=%E2%9C%93),
|
||
as it's possible that someone else has already reported your error. This doesn't
|
||
always work, and sometimes it's hard to know what to search for, so consider this
|
||
extra credit. We won't mind if you accidentally file a duplicate report.
|
||
|
||
Opening an issue is as easy as following [this
|
||
link](https://github.com/rust-lang/rust/issues/new) and filling out the fields.
|
||
Here's a template that you can use to file a bug, though it's not necessary to
|
||
use it exactly:
|
||
|
||
<short summary of the bug>
|
||
|
||
I tried this code:
|
||
|
||
<code sample that causes the bug>
|
||
|
||
I expected to see this happen: <explanation>
|
||
|
||
Instead, this happened: <explanation>
|
||
|
||
## Meta
|
||
|
||
`rustc --version --verbose`:
|
||
|
||
Backtrace:
|
||
|
||
All three components are important: what you did, what you expected, what
|
||
happened instead. Please include the output of `rustc --version --verbose`,
|
||
which includes important information about what platform you're on, what
|
||
version of Rust you're using, etc.
|
||
|
||
Sometimes, a backtrace is helpful, and so including that is nice. To get
|
||
a backtrace, set the `RUST_BACKTRACE` environment variable. The easiest way
|
||
to do this is to invoke `rustc` like this:
|
||
|
||
```bash
|
||
$ RUST_BACKTRACE=1 rustc ...
|
||
```
|
||
|
||
## Pull Requests
|
||
|
||
Pull requests are the primary mechanism we use to change Rust. GitHub itself
|
||
has some [great documentation][pull-requests] on using the Pull Request
|
||
feature. We use the 'fork and pull' model described there.
|
||
|
||
[pull-requests]: https://help.github.com/articles/using-pull-requests/
|
||
|
||
Please make pull requests against the `master` branch.
|
||
|
||
Compiling all of `make check` can take a while. When testing your pull request,
|
||
consider using one of the more specialized `make` targets to cut down on the
|
||
amount of time you have to wait. You need to have built the compiler at least
|
||
once before running these will work, but that’s only one full build rather than
|
||
one each time.
|
||
|
||
$ make -j8 rustc-stage1 && make check-stage1
|
||
|
||
is one such example, which builds just `rustc`, and then runs the tests. If
|
||
you’re adding something to the standard library, try
|
||
|
||
$ make -j8 check-stage1-std NO_REBUILD=1
|
||
|
||
This will not rebuild the compiler, but will run the tests.
|
||
|
||
All pull requests are reviewed by another person. We have a bot,
|
||
@rust-highfive, that will automatically assign a random person to review your
|
||
request.
|
||
|
||
If you want to request that a specific person reviews your pull request,
|
||
you can add an `r?` to the message. For example, Steve usually reviews
|
||
documentation changes. So if you were to make a documentation change, add
|
||
|
||
r? @steveklabnik
|
||
|
||
to the end of the message, and @rust-highfive will assign @steveklabnik instead
|
||
of a random person. This is entirely optional.
|
||
|
||
After someone has reviewed your pull request, they will leave an annotation
|
||
on the pull request with an `r+`. It will look something like this:
|
||
|
||
@bors: r+ 38fe8d2
|
||
|
||
This tells @bors, our lovable integration bot, that your pull request has
|
||
been approved. The PR then enters the [merge queue][merge-queue], where @bors
|
||
will run all the tests on every platform we support. If it all works out,
|
||
@bors will merge your code into `master` and close the pull request.
|
||
|
||
[merge-queue]: http://buildbot.rust-lang.org/homu/queue/rust
|
||
|
||
Speaking of tests, Rust has a comprehensive test suite. More information about
|
||
it can be found
|
||
[here](https://github.com/rust-lang/rust-wiki-backup/blob/master/Note-testsuite.md).
|
||
|
||
## Writing Documentation
|
||
|
||
Documentation improvements are very welcome. The source of `doc.rust-lang.org`
|
||
is located in `src/doc` in the tree, and standard API documentation is generated
|
||
from the source code itself.
|
||
|
||
Documentation pull requests function in the same way as other pull requests,
|
||
though you may see a slightly different form of `r+`:
|
||
|
||
@bors: r+ 38fe8d2 rollup
|
||
|
||
That additional `rollup` tells @bors that this change is eligible for a 'rollup'.
|
||
To save @bors some work, and to get small changes through more quickly, when
|
||
@bors attempts to merge a commit that's rollup-eligible, it will also merge
|
||
the other rollup-eligible patches too, and they'll get tested and merged at
|
||
the same time.
|
||
|
||
To find documentation-related issues, sort by the [A-docs label][adocs].
|
||
|
||
[adocs]: https://github.com/rust-lang/rust/issues?q=is%3Aopen+is%3Aissue+label%3AA-docs
|
||
|
||
## Issue Triage
|
||
|
||
Sometimes, an issue will stay open, even though the bug has been fixed. And
|
||
sometimes, the original bug may go stale because something has changed in the
|
||
meantime.
|
||
|
||
It can be helpful to go through older bug reports and make sure that they are
|
||
still valid. Load up an older issue, double check that it's still true, and
|
||
leave a comment letting us know if it is or is not. The [least recently
|
||
updated sort][lru] is good for finding issues like this.
|
||
|
||
Contributors with sufficient permissions on the Rust repo can help by adding
|
||
labels to triage issues:
|
||
|
||
* Yellow, **A**-prefixed labels state which **area** of the project an issue
|
||
relates to.
|
||
|
||
* Magenta, **B**-prefixed labels identify bugs which **belong** elsewhere.
|
||
|
||
* Green, **E**-prefixed labels explain the level of **experience** necessary
|
||
to fix the issue.
|
||
|
||
* Red, **I**-prefixed labels indicate the **importance** of the issue. The
|
||
[I-nominated][inom] label indicates that an issue has been nominated for
|
||
prioritizing at the next triage meeting.
|
||
|
||
* Orange, **P**-prefixed labels indicate a bug's **priority**. These labels
|
||
are only assigned during triage meetings, and replace the [I-nominated][inom]
|
||
label.
|
||
|
||
* Blue, **T**-prefixed bugs denote which **team** the issue belongs to.
|
||
|
||
* Dark blue, **beta-** labels track changes which need to be backported into
|
||
the beta branches.
|
||
|
||
* The purple **metabug** label marks lists of bugs collected by other
|
||
categories.
|
||
|
||
If you're looking for somewhere to start, check out the [E-easy][eeasy] tag.
|
||
|
||
[inom]: https://github.com/rust-lang/rust/issues?q=is%3Aopen+is%3Aissue+label%3AI-nominated
|
||
[eeasy]: https://github.com/rust-lang/rust/issues?q=is%3Aopen+is%3Aissue+label%3AE-easy
|
||
[lru]: https://github.com/rust-lang/rust/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-asc
|
||
|
||
## Out-of-tree Contributions
|
||
|
||
There are a number of other ways to contribute to Rust that don't deal with
|
||
this repository.
|
||
|
||
Answer questions in [#rust][pound-rust], or on [users.rust-lang.org][users],
|
||
or on [StackOverflow][so].
|
||
|
||
Participate in the [RFC process](https://github.com/rust-lang/rfcs).
|
||
|
||
Find a [requested community library][community-library], build it, and publish
|
||
it to [Crates.io](http://crates.io). Easier said than done, but very, very
|
||
valuable!
|
||
|
||
[pound-rust]: http://chat.mibbit.com/?server=irc.mozilla.org&channel=%23rust
|
||
[users]: http://users.rust-lang.org/
|
||
[so]: http://stackoverflow.com/questions/tagged/rust
|
||
[community-library]: https://github.com/rust-lang/rfcs/labels/A-community-library
|