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2018-11-30rebase --stat: fix when rebasing to an unrelated historyLibravatar Johannes Schindelin1-2/+8
When rebasing to a commit history that has no common commits with the current branch, there is no merge base. In diffstat mode, this means that we cannot compare to the merge base, but we have to compare to the empty tree instead. Also, if running in verbose diffstat mode, we should not output Changes from <merge-base> to <onto> as that does not make sense without any merge base. Note: neither scripted nor built-in versoin of `git rebase` were prepared for this situation well. We use this opportunity not only to fix the bug(s), but also to make both versions' output consistent in this instance. And add a regression test to keep this working in all eternity. Reported-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-11-21legacy-rebase: backport -C<n> and --whitespace=<option> checksLibravatar Johannes Schindelin1-0/+8
Since 04519d720114 (rebase: validate -C<n> and --whitespace=<mode> parameters early, 2018-11-14), the built-in rebase validates the -C and --whitespace arguments early. As this commit also introduced a regression test for this, and as a later commit introduced the GIT_TEST_REBASE_USE_BUILTIN mode to run tests, we now have a "regression" in the scripted version of `git rebase` on our hands. Backport the validation to fix this. Reported-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-11-02Merge branch 'ag/rebase-i-in-c'Libravatar Junio C Hamano1-5/+42
Rewrite of the remaining "rebase -i" machinery in C. * ag/rebase-i-in-c: rebase -i: move rebase--helper modes to rebase--interactive rebase -i: remove git-rebase--interactive.sh rebase--interactive2: rewrite the submodes of interactive rebase in C rebase -i: implement the main part of interactive rebase as a builtin rebase -i: rewrite init_basic_state() in C rebase -i: rewrite write_basic_state() in C rebase -i: rewrite the rest of init_revisions_and_shortrevisions() in C rebase -i: implement the logic to initialize $revisions in C rebase -i: remove unused modes and functions rebase -i: rewrite complete_action() in C t3404: todo list with commented-out commands only aborts sequencer: change the way skip_unnecessary_picks() returns its result sequencer: refactor append_todo_help() to write its message to a buffer rebase -i: rewrite checkout_onto() in C rebase -i: rewrite setup_reflog_action() in C sequencer: add a new function to silence a command, except if it fails rebase -i: rewrite the edit-todo functionality in C editor: add a function to launch the sequence editor rebase -i: rewrite append_todo_help() in C sequencer: make three functions and an enum from sequencer.c public
2018-11-02Merge branch 'pk/rebase-in-c'Libravatar Junio C Hamano1-0/+708
Rewrite of the "rebase" machinery in C. * pk/rebase-in-c: builtin/rebase: support running "git rebase <upstream>" rebase: refactor common shell functions into their own file rebase: start implementing it as a builtin
2018-08-06rebase: refactor common shell functions into their own fileLibravatar Pratik Karki1-67/+2
The functions present in `git-legacy-rebase.sh` are used by the rebase backends as they are implemented as shell script functions in the `git-rebase--<backend>` files. To make the `builtin/rebase.c` work, we have to provide support via a Unix shell script snippet that uses these functions and so, we want to use the rebase backends *directly* from the builtin rebase without going through `git-legacy-rebase.sh`. This commit extracts the functions to a separate file, `git-rebase--common`, that will be read by `git-legacy-rebase.sh` and by the shell script snippets which will be used extensively in the following commits. Signed-off-by: Pratik Karki <predatoramigo@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-06rebase: start implementing it as a builtinLibravatar Pratik Karki1-0/+773
This commit imitates the strategy that was used to convert the difftool to a builtin. We start by renaming the shell script `git-rebase.sh` to `git-legacy-rebase.sh` and introduce a `builtin/rebase.c` that simply executes the shell script version, unless the config setting `rebase.useBuiltin` is set to `true`. The motivation behind this is to rewrite all the functionality of the shell script version in the aforementioned `rebase.c`, one by one and be able to conveniently test new features by configuring `rebase.useBuiltin`. In the original difftool conversion, if sane_execvp() that attempts to run the legacy scripted version returned with non-negative status, the command silently exited without doing anything with success, but sane_execvp() should not return with non-negative status in the first place, so we use die() to notice such an abnormal case. We intentionally avoid reading the config directly to avoid messing up the GIT_* environment variables when we need to fall back to exec()ing the shell script. The test of builtin rebase can be done by `git -c rebase.useBuiltin=true rebase ...` Signed-off-by: Pratik Karki <predatoramigo@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>