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2022-01-26rebase --apply: set ORIG_HEAD correctlyLibravatar Phillip Wood1-0/+4
At the start of a rebase, ORIG_HEAD is updated to the tip of the branch being rebased. Unfortunately reset_head() always uses the current value of HEAD for this which is incorrect if the rebase is started with "git rebase <upstream> <branch>" as in that case ORIG_HEAD should be updated to <branch>. This only affects the "apply" backend as the "merge" backend does not yet use reset_head() for the initial checkout. Fix this by passing in orig_head when calling reset_head() and add some regression tests. Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-01-26rebase --apply: fix reflogLibravatar Phillip Wood1-0/+4
move_to_original_branch() passes the message intended for the branch reflog as `orig_head_msg`. Fix this by adding a `branch_msg` member to struct reset_head_opts and add a regression test. Note that these reflog messages do not respect GIT_REFLOG_ACTION. They are not alone in that and will be fixed in a future series. The "merge" backend already has tests that check both the branch and HEAD reflogs. Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-01-26reset_head(): take struct rebase_head_optsLibravatar Phillip Wood1-4/+36
This function takes a confusingly large number of parameters which makes it difficult to remember which order to pass them in. The following commits will add a couple more parameters which makes the problem worse. To address this change the function to take a struct of options. Using a struct means that it is no longer necessary to remember which order to pass the parameters in and anyone reading the code can easily see which value is passed to each parameter. Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-01-26reset_head(): remove action parameterLibravatar Phillip Wood1-1/+1
The only use of the action parameter is to setup the error messages for unpack_trees(). All but two cases pass either "checkout" or "reset". The case that passes "reset --hard" would be better passing "reset" so that the error messages match the builtin reset command like all the other callers that are doing a reset. The case that passes "Fast-forwarded" is only updating HEAD and so the parameter is unused in that case as it does not call unpack_trees(). The value to pass to setup_unpack_trees_porcelain() can be determined by checking whether flags contains RESET_HEAD_HARD without the caller having to specify it. Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-04-10reset: extract reset_head() from rebaseLibravatar Denton Liu1-0/+20
Continue the process of lib-ifying the autostash code. In a future commit, this will be used to implement `--autostash` in other builtins. This patch is best viewed with `--color-moved`. Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>