commit | a7256debd4b6ba9f6ccb94c0958ef48cdd8cb664 | [log] [tgz] |
---|---|---|
author | Nguyễn Thái Ngọc Duy <pclouds@gmail.com> | Tue Mar 19 16:39:10 2019 +0700 |
committer | Junio C Hamano <gitster@pobox.com> | Thu Mar 21 12:07:41 2019 +0900 |
tree | ae02f9142f207d27c8ab68c77e9f259b5db4c911 | |
parent | aeb582a98374c094361cba1bd756dc6307432c42 [diff] |
checkout.txt: note about losing staged changes with --merge If you have staged changes in path A and perform 'checkout --merge' (which could result in conflicts in a totally unrelated path B), changes in A will be gone. Which is unexpected. We are supposed to keep all changes, or kick and scream otherwise. This is the result of how --merge is implemented, from the very first day in 1be0659efc (checkout: merge local modifications while switching branches., 2006-01-12): 1. a merge is done, unmerged entries are collected 2. a hard switch to a new branch is done, then unmerged entries added back There is no trivial fix for this. Going with 3-way merge one file at a time loses rename detection. Going with 3-way merge by trees requires teaching the algorithm to pick up staged changes. And even if we detect staged changes with --merge and abort for safety, an option to continue --merge is very weird. Such an option would keep worktree changes, but drop staged changes. Because the problem has been with us since the introduction of --merge and everybody has been pretty happy (except Phillip, who found this problem), I'll just take a note here to acknowledge it and wait for merge wizards to come in and work their magic. There may be a way forward [1]. [1] CABPp-BFoL_U=bzON4SEMaQSKU2TKwnOgNqjt5MUaOejTKGUJxw@mail.gmail.com Reported-by: Phillip Wood <phillip.wood@dunelm.org.uk> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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