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Eduardo Broto 2020-12-09 17:20:38 +01:00 committed by flip1995
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40
CONTRIBUTING.md
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@ -70,8 +70,8 @@ But we can make it nest-less by using [if_chain] macro, [like this][nest-less].
[`E-medium`] issues are generally pretty easy too, though it's recommended you work on an [`good first issue`]
first. Sometimes they are only somewhat involved code wise, but not difficult per-se.
Note that [`E-medium`] issues may require some knowledge of Clippy internals or some
debugging to find the actual problem behind the issue.
Note that [`E-medium`] issues may require some knowledge of Clippy internals or some
debugging to find the actual problem behind the issue.
[`T-middle`] issues can be more involved and require verifying types. The [`ty`] module contains a
lot of methods that are useful, though one of the most useful would be `expr_ty` (gives the type of
@ -182,7 +182,7 @@ That's why the `else_if_without_else` example uses the `register_early_pass` fun
[early_lint_pass]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_lint/trait.EarlyLintPass.html
[late_lint_pass]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_lint/trait.LateLintPass.html
## Syncing changes from [`rust-lang/rust`] to Clippy
## Syncing changes between Clippy and [`rust-lang/rust`]
Clippy currently gets built with a pinned nightly version.
@ -190,13 +190,18 @@ In the `rust-lang/rust` repository, where rustc resides, there's a copy of Clipp
that compiler hackers modify from time to time to adapt to changes in the unstable
API of the compiler.
We need to sync these changes back to this repository periodically. If you want
to help with that, you have to sync the `rust-lang/rust-clippy` repository with
the `subtree` copy of Clippy in the `rust-lang/rust` repository, and update
the `rustc-toolchain` file accordingly.
We need to sync these changes back to this repository periodically, and the changes
made to this repository in the meantime also need to be synced to the `rust-lang/rust` repository.
For general information about `subtree`s in the Rust repository
see [Rust's `CONTRIBUTING.md`][subtree].
To avoid flooding the `rust-lang/rust` PR queue, this two-way sync process is done
in a bi-weekly basis if there's no urgent changes. This is done starting on the day of
the Rust stable release and then every other week. That way we guarantee that we keep
this repo up to date with the latest compiler API, and every feature in Clippy is available
for 2 weeks in nightly, before it can get to beta. For reference, the first sync
following this cadence was performed the 2020-08-27.
This process is described in detail in the following sections. For general information
about `subtree`s in the Rust repository see [Rust's `CONTRIBUTING.md`][subtree].
### Patching git-subtree to work with big repos
@ -225,13 +230,14 @@ This shell has a hardcoded recursion limit set to 1000. In order to make this pr
you need to force the script to run `bash` instead. You can do this by editing the first
line of the `git-subtree` script and changing `sh` to `bash`.
### Performing the sync
### Performing the sync from [`rust-lang/rust`] to Clippy
Here is a TL;DR version of the sync process (all of the following commands have
to be run inside the `rust` directory):
1. Clone the [`rust-lang/rust`] repository
2. Sync the changes to the rust-copy of Clippy to your Clippy fork:
1. Clone the [`rust-lang/rust`] repository or make sure it is up to date.
2. Checkout the commit from the latest available nightly. You can get it using `rustup check`.
3. Sync the changes to the rust-copy of Clippy to your Clippy fork:
```bash
# Make sure to change `your-github-name` to your github name in the following command
git subtree push -P src/tools/clippy git@github.com:your-github-name/rust-clippy sync-from-rust
@ -249,17 +255,11 @@ to be run inside the `rust` directory):
git checkout sync-from-rust
git merge upstream/master
```
3. Open a PR to `rust-lang/rust-clippy` and wait for it to get merged (to
4. Open a PR to `rust-lang/rust-clippy` and wait for it to get merged (to
accelerate the process ping the `@rust-lang/clippy` team in your PR and/or
~~annoy~~ ask them in the [Zulip] stream.)
### Syncing back changes in Clippy to [`rust-lang/rust`]
To avoid flooding the [`rust-lang/rust`] PR queue, changes in Clippy's repo are synced back
in a bi-weekly basis if there's no urgent changes. This is done starting on the day of
the Rust stable release and then every other week. That way we guarantee that
every feature in Clippy is available for 2 weeks in nightly, before it can get to beta.
For reference, the first sync following this cadence was performed the 2020-08-27.
### Performing the sync from Clippy to [`rust-lang/rust`]
All of the following commands have to be run inside the `rust` directory.

2
rust-toolchain
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@ -1,3 +1,3 @@
[toolchain]
channel = "nightly-2020-11-29"
channel = "nightly-2020-12-09"
components = ["llvm-tools-preview", "rustc-dev", "rust-src", "rustfmt"]