From e032abd5a0bec40a700527f71073f3ba21fce7d6 Mon Sep 17 00:00:00 2001 From: Phillip Wood Date: Wed, 6 Sep 2023 15:22:49 +0000 Subject: [PATCH] rebase: fix rewritten list for failed pick git rebase keeps a list that maps the OID of each commit before it was rebased to the OID of the equivalent commit after the rebase. This list is used to drive the "post-rewrite" hook that is called at the end of a successful rebase. When a rebase stops for the user to resolve merge conflicts the OID of the commit being picked is written to ".git/rebase-merge/stopped-sha". Then when the rebase is continued that OID is added to the list of rewritten commits. Unfortunately if a commit cannot be picked because it would overwrite an untracked file we still write the "stopped-sha1" file. This means that when the rebase is continued the commit is added into the list of rewritten commits even though it has not been picked yet. Fix this by not calling error_with_patch() for failed commands. The pick has failed so there is nothing to commit and therefore we do not want to set up the state files for committing staged changes when the rebase continues. This change means we no-longer write a patch for the failed command or display the error message printed by error_with_patch(). As the command has failed the patch isn't really useful and in any case the user can inspect the commit associated with the failed command by inspecting REBASE_HEAD. Unless the user has disabled it we already print an advice message that is more helpful than the message from error_with_patch() which the user will still see. Even if the advice is disabled the user will see the messages from the merge machinery detailing the problem. The code to add a failed command back into the todo list is duplicated between pick_one_commit() and the loop in pick_commits(). Both sites print advice about the command being rescheduled, decrement the current item and save the todo list. To avoid duplicating this code pick_one_commit() is modified to set a flag to indicate that the command should be rescheduled in the main loop. This simplifies things as only the remaining copy of the code needs to be modified to set REBASE_HEAD rather than calling error_with_patch(). Signed-off-by: Phillip Wood Signed-off-by: Junio C Hamano --- sequencer.c | 19 +++++--------- t/t3404-rebase-interactive.sh | 6 +++++ t/t3430-rebase-merges.sh | 4 +-- t/t5407-post-rewrite-hook.sh | 48 +++++++++++++++++++++++++++++++++++ 4 files changed, 63 insertions(+), 14 deletions(-) diff --git a/sequencer.c b/sequencer.c index 5b598413e3..575464358c 100644 --- a/sequencer.c +++ b/sequencer.c @@ -4141,6 +4141,7 @@ static int do_merge(struct repository *r, if (ret < 0) { error(_("could not even attempt to merge '%.*s'"), merge_arg_len, arg); + unlink(git_path_merge_msg(r)); goto leave_merge; } /* @@ -4631,7 +4632,7 @@ N_("Could not execute the todo command\n" static int pick_one_commit(struct repository *r, struct todo_list *todo_list, struct replay_opts *opts, - int *check_todo) + int *check_todo, int* reschedule) { int res; struct todo_item *item = todo_list->items + todo_list->current; @@ -4644,12 +4645,8 @@ static int pick_one_commit(struct repository *r, check_todo); if (is_rebase_i(opts) && res < 0) { /* Reschedule */ - advise(_(rescheduled_advice), - get_item_line_length(todo_list, todo_list->current), - get_item_line(todo_list, todo_list->current)); - todo_list->current--; - if (save_todo(todo_list, opts)) - return -1; + *reschedule = 1; + return -1; } if (item->command == TODO_EDIT) { struct commit *commit = item->commit; @@ -4749,7 +4746,8 @@ static int pick_commits(struct repository *r, } } if (item->command <= TODO_SQUASH) { - res = pick_one_commit(r, todo_list, opts, &check_todo); + res = pick_one_commit(r, todo_list, opts, &check_todo, + &reschedule); if (!res && item->command == TODO_EDIT) return 0; } else if (item->command == TODO_EXEC) { @@ -4803,10 +4801,7 @@ static int pick_commits(struct repository *r, if (save_todo(todo_list, opts)) return -1; if (item->commit) - return error_with_patch(r, - item->commit, - arg, item->arg_len, - opts, res, 0); + write_rebase_head(&item->commit->object.oid); } else if (is_rebase_i(opts) && check_todo && !res && reread_todo_if_changed(r, todo_list, opts)) { return -1; diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh index ff0afad63e..6d3788c588 100755 --- a/t/t3404-rebase-interactive.sh +++ b/t/t3404-rebase-interactive.sh @@ -1287,7 +1287,9 @@ test_expect_success 'rebase -i commits that overwrite untracked files (pick)' ' >file6 && test_must_fail git rebase --continue && test_cmp_rev HEAD F && + test_cmp_rev REBASE_HEAD I && rm file6 && + test_path_is_missing .git/rebase-merge/patch && git rebase --continue && test_cmp_rev HEAD I ' @@ -1305,7 +1307,9 @@ test_expect_success 'rebase -i commits that overwrite untracked files (squash)' >file6 && test_must_fail git rebase --continue && test_cmp_rev HEAD F && + test_cmp_rev REBASE_HEAD I && rm file6 && + test_path_is_missing .git/rebase-merge/patch && git rebase --continue && test $(git cat-file commit HEAD | sed -ne \$p) = I && git reset --hard original-branch2 @@ -1323,7 +1327,9 @@ test_expect_success 'rebase -i commits that overwrite untracked files (no ff)' ' >file6 && test_must_fail git rebase --continue && test $(git cat-file commit HEAD | sed -ne \$p) = F && + test_cmp_rev REBASE_HEAD I && rm file6 && + test_path_is_missing .git/rebase-merge/patch && git rebase --continue && test $(git cat-file commit HEAD | sed -ne \$p) = I ' diff --git a/t/t3430-rebase-merges.sh b/t/t3430-rebase-merges.sh index f03599c63b..5514738abd 100755 --- a/t/t3430-rebase-merges.sh +++ b/t/t3430-rebase-merges.sh @@ -165,12 +165,12 @@ test_expect_success 'failed `merge -C` writes patch (may be rescheduled, too)' ' test_config sequence.editor \""$PWD"/replace-editor.sh\" && test_tick && test_must_fail git rebase -ir HEAD && + test_cmp_rev REBASE_HEAD H^0 && grep "^merge -C .* G$" .git/rebase-merge/done && grep "^merge -C .* G$" .git/rebase-merge/git-rebase-todo && - test_path_is_file .git/rebase-merge/patch && + test_path_is_missing .git/rebase-merge/patch && : fail because of merge conflict && - rm G.t .git/rebase-merge/patch && git reset --hard conflicting-G && test_must_fail git rebase --continue && ! grep "^merge -C .* G$" .git/rebase-merge/git-rebase-todo && diff --git a/t/t5407-post-rewrite-hook.sh b/t/t5407-post-rewrite-hook.sh index 5f3ff051ca..ad7f8c6f00 100755 --- a/t/t5407-post-rewrite-hook.sh +++ b/t/t5407-post-rewrite-hook.sh @@ -17,6 +17,12 @@ test_expect_success 'setup' ' git checkout A^0 && test_commit E bar E && test_commit F foo F && + git checkout B && + git merge E && + git tag merge-E && + test_commit G G && + test_commit H H && + test_commit I I && git checkout main && test_hook --setup post-rewrite <<-EOF @@ -173,6 +179,48 @@ test_fail_interactive_rebase () { ) } +test_expect_success 'git rebase with failed pick' ' + clear_hook_input && + cat >todo <<-\EOF && + exec >bar + merge -C merge-E E + exec >G + pick G + exec >H 2>I + pick H + fixup I + EOF + + ( + set_replace_editor todo && + test_must_fail git rebase -i D D 2>err + ) && + grep "would be overwritten" err && + rm bar && + + test_must_fail git rebase --continue 2>err && + grep "would be overwritten" err && + rm G && + + test_must_fail git rebase --continue 2>err && + grep "would be overwritten" err && + rm H && + + test_must_fail git rebase --continue 2>err && + grep "would be overwritten" err && + rm I && + + git rebase --continue && + echo rebase >expected.args && + cat >expected.data <<-EOF && + $(git rev-parse merge-E) $(git rev-parse HEAD~2) + $(git rev-parse G) $(git rev-parse HEAD~1) + $(git rev-parse H) $(git rev-parse HEAD) + $(git rev-parse I) $(git rev-parse HEAD) + EOF + verify_hook_input +' + test_expect_success 'git rebase -i (unchanged)' ' git reset --hard D && clear_hook_input &&