bors b651646510 Auto merge of #13676 - fasterthanlime:subtree-fix, r=Veykril ... Mega-sync from `rust-lang/rust` This essentially implements `@oli-obk's` suggestion here https://github.com/rust-lang/rust-analyzer/pull/13459#issuecomment-1297285607, with `@eddyb's` help. This PR is equivalent to 14 syncs (back and forth) between `rust-lang/rust` and `rust-lang/rust-analyzer`. Working from this list (from bottom to top): ``` (x) a2a1d9954 ⬆️ rust-analyzer (x) 79923c382 ⬆️ rust-analyzer (x) c60b1f641 ⬆️ rust-analyzer (x) 8807fc4cc ⬆️ rust-analyzer (x) a99a48e78 ⬆️ rust-analyzer (x) 4f55ebbd4 ⬆️ rust-analyzer (x) f5fde4df4 ⬆️ rust-analyzer (x) 459bbb422 ⬆️ rust-analyzer (x) 65e1dc4d9 ⬆️ rust-analyzer (x) 3e358a682 ⬆️ rust-analyzer (x) 31519bb39 ⬆️ rust-analyzer (x) 8231fee46 ⬆️ rust-analyzer (x) 22c8c9c40 ⬆️ rust-analyzer (x) 9d2cb42a4 ⬆️ rust-analyzer ``` (This listed was assembled by doing a `git subtree push`, which made a branch, and looking at the new commits in that branch, picking only those that were `⬆️ rust-analyzer` commits) We used the following commands to simulate merges in both directions: ```shell TO_MERGE=22c8c9c40 # taken from the list above, bottom to top git merge --no-edit --no-ff $TO_MERGE git merge --no-edit --no-ff $(git -C ../rust log --pretty=format:'%cN | %s | %ad => %P' | rg -m1 -F "$(git show --no-patch --pretty=format:%ad $TO_MERGE)" | tee /dev/stderr | rg '.* => \S+ (\S+)$' --replace '$1') ``` We encountered no merge conflicts that Git wasn't able to solve by doing it this way. Here's what the commit graph looks like (as shown in the Git Lens VSCode extension): <img width="1345" alt="image" src="https://user-images.githubusercontent.com/7998310/203984523-7c1a690a-8224-416c-8015-ed6e49667066.png"> This PR closes #13459 ## Does this unbreak `rust->ra` syncs? Yes, here's how we tried: In `rust-analyzer`: * check out `subtree-fix` (this PR's branch) * make a new branch off of it: `git checkout -b subtree-fix-merge-test` * simulate this PR getting merged with `git merge master` In `rust`: * pull latest master * make a new branch: `git checkout -b test-change` * mess with rust-analyzer (I added a comment to `src/tools/rust-analyzer/Cargo.toml`) * commit * run `git subtree push -P src/tools/rust-analyzer ra-local final-sync` (this follows the [Clippy sync guide](https://doc.rust-lang.org/nightly/clippy/development/infrastructure/sync.html)) This created a `final-sync` branch in `rust-analyzer`. In `rust-analyzer`: * `git merge --no-ff final-sync` (this follows the [Clippy sync guide](https://doc.rust-lang.org/nightly/clippy/development/infrastructure/sync.html)) Now `git log` in `rust-analyzer` shows this: ``` commit 460128387e46ddfc2b95921b2d7f6e913a3d2b9f (HEAD -> subtree-fix-merge-test) Merge: 0513fc02a 9ce6a734f Author: Amos Wenger <amoswenger@gmail.com> Date: Fri Nov 25 13:28:24 2022 +0100 Merge branch 'final-sync' into subtree-fix-merge-test commit 0513fc02a08ea9de952983624bd0a00e98044b36 Merge: 38c98d1ff 6918009fe Author: Amos Wenger <amoswenger@gmail.com> Date: Fri Nov 25 13:28:02 2022 +0100 Merge branch 'master' into subtree-fix-merge-test commit 9ce6a734f37ef8e53689f1c6f427a9efafe846bd (final-sync) Author: Amos Wenger <amoswenger@gmail.com> Date: Fri Nov 25 13:26:26 2022 +0100 Mess with rust-analyzer just for fun ``` And `git diff 0513fc02a08ea9de952983624bd0a00e98044b36` shows this: ```patch diff --git a/Cargo.toml b/Cargo.toml index 286ef1e7d..c9e24cd19 100644 --- a/Cargo.toml +++ b/Cargo.toml `@@` -32,3 +32,5 `@@` debug = 0 # ungrammar = { path = "../ungrammar" } # salsa = { path = "../salsa" } + +# lol, hi ``` ## Does this unbreak `ra->rust` syncs? Yes, here's how we tried. From `rust`: * `git checkout -b sync-from-ra` * `git subtree pull -P src/tools/rust-analyzer ra-local subtree-fix-merge-test` (this is adapted from the [Clippy sync guide](https://doc.rust-lang.org/nightly/clippy/development/infrastructure/sync.html#performing-the-sync-from-clippy-to-rust-langrust), you would normally use `ra-upstream master` but we're simulating things here) A commit editor pops up, there was no merge conflicts. ## How do we prevent this from happening again? Like `@bjorn3` said in https://github.com/rust-lang/rust-analyzer/pull/13459#issuecomment-1293587848 > Whenever syncing from rust-analyzer -> rust you have to immediately sync the merge commit from rust -> rust-analyzer to prevent merge conflicts in the future. But if we get it wrong again, at least now we have a not-so-painful way to fix it.		2022-11-25 21:27:46 +00:00
..
src	Auto merge of #13676 - fasterthanlime:subtree-fix, r=Veykril	2022-11-25 21:27:46 +00:00
tests/slow-tests	⬆️ rust-analyzer	2022-10-18 09:12:49 +03:00
build.rs	Fix typo in build.rs	2022-06-26 10:09:45 +00:00
Cargo.toml	⬆️ rust-analyzer	2022-11-23 17:24:03 +02:00