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This commit is contained in:
Oliver Scherer 2020-04-02 17:20:56 +02:00
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CONTRIBUTING.md
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@ -203,21 +203,27 @@ They are just regular files and directories. This is in contrast to `submodule`
There are two synchronization directions: `subtree push` and `subtree pull`.
```
git subtree push -P src/tools/clippy https://github.com/rust-lang/rust-clippy.git
git subtree push -P src/tools/clippy git@github.com:your-github-name/rust-clippy rustup
```
takes all the changes that
happened to the copy in this repo and creates commits on the remote repo that match the local
changes (so every local commit that touched the subtree causes a commit on the remote repo).
changes. Every local commit that touched the subtree causes a commit on the remote repo, but is
modified to move the files from the specified directory to the tool repo root.
Make sure to not pick the `master` branch, so you can open a normal PR to the tool to merge that
subrepo push.
```
git subtree pull -P src/tools/clippy https://github.com/rust-lang/rust-clippy.git
git subtree pull -P src/tools/clippy https://github.com/rust-lang/rust-clippy master
```
takes all changes since the last `subtree pull` from the tool repo
repo and adds these commits to the rustc repo + a merge commit that moves the tool changes into
the specified directory in the rust repository.
takes all changes since the last `subtree pull` from the clippy
repo and adds these commits to the rustc repo + a merge commit with the existing changes.
It is recommended that you always do a push before a pull, so that the merge works without conflicts.
It is recommended that you always do a push first and get that merged to the tool master branch.
Then, when you do a pull, the merge works without conflicts.
While definitely possible to resolve conflicts during a pull, you may have to redo the conflict
resolution if your PR doesn't get merged fast enough and there are new conflicts. Do not try to
rebase the result of a `git subtree pull`, rebasing merge commits is a bad idea in general.