docs: update contributing docs for submodule/subtree changes

This commit is contained in:
许杰友 Jieyou Xu (Joe) 2025-01-20 21:53:59 +08:00
parent b5741a36a8
commit e749a38886

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@ -12,6 +12,15 @@ Documentation for contributing to the compiler or tooling is located in the [Gui
Development][rustc-dev-guide], commonly known as the [rustc-dev-guide]. Documentation for the
standard library in the [Standard library developers Guide][std-dev-guide], commonly known as the [std-dev-guide].
## Making changes to subtrees and submodules
For submodules, changes need to be made against the repository corresponding the
submodule, and not the main `rust-lang/rust` repository.
For subtrees, prefer sending a PR against the subtree's repository if it does
not need to be made against the main `rust-lang/rust` repostory (e.g. a
rustc-dev-guide change that does not accompany a compiler change).
## About the [rustc-dev-guide]
The [rustc-dev-guide] is meant to help document how rustc the Rust compiler works,