Since `git rebase -r` was introduced, that is possible. But our
machinery did not think that possible, and failed to say anything about
the rebase in progress when in the middle of a merge.
Let's work around that in the minimal fashion.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
The scripted version of the rebase used to execute `git reset --hard`
when skipping or aborting. When we ported this to C, we did update the
worktree and some reflogs, but we failed to imitate `git reset --hard`'s
behavior regarding files in .git/ such as MERGE_HEAD.
Let's address this oversight.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Every once in a while, the interactive rebase makes sure that no stale
files are lying around. These days, we need to include MERGE_HEAD into
that set of files, as the `merge` command will generate them.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
When we detect that a `merge` can be skipped because the merged commit
is already an ancestor of HEAD, we do not need to commit, therefore
writing the MERGE_HEAD file is useless.
It is actually worse than useless: a subsequent `git commit` will pick
it up and think that we want to merge that commit, still.
To avoid that, move the code that writes the MERGE_HEAD file to a
location where we already know that the `merge` cannot be skipped.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
When calling `merge` on a branch that has already been merged, that
`merge` is skipped quietly, but currently a MERGE_HEAD file is being
left behind and will then be grabbed by the next `pick` (that did
not want to create a *merge* commit).
Demonstrate this.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Now that the builtin rebase is feature-complete, we should use it by
default. Let's keep the legacy scripted version around for the time
being; Once the builtin rebase is well-tested enough, we can remove
`git-legacy-rebase.sh`.
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The builtin rebase and the builtin interactive rebase have been
developed independently, on purpose: Google Summer of Code rules
specifically state that students have to work on independent projects,
they cannot collaborate on the same project.
One fallout is that the rebase-in-c and rebase-i-in-c patches cause no
merge conflicts but a royal number of tests in the test suite to fail.
It is easy to explain why: rebase-in-c was developed under the
assumption that all rebase backends are implemented in Unix shell script
and can be sourced via `. git-rebase--<backend>`, which is no longer
true with rebase-i-in-c, where git-rebase--interactive is a hard-linked
builtin.
This patch fixes that.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* 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
This moves the rebase--helper modes still used by
git-rebase--preserve-merges.sh (`--shorten-ids`, `--expand-ids`,
`--check-todo-list`, `--rearrange-squash` and `--add-exec-commands`) to
rebase--interactive.c.
git-rebase--preserve-merges.sh is modified accordingly, and
rebase--helper.c is removed as it is useless now.
Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This removes git-rebase--interactive.sh, as its functionnality has been
replaced by git-rebase--interactive2.
git-rebase--interactive2.c is then renamed to git-rebase--interactive.c.
Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This rewrites the submodes of interactive rebase (`--continue`,
`--skip`, `--edit-todo`, and `--show-current-patch`) in C.
git-rebase.sh is then modified to call directly git-rebase--interactive2
instead of git-rebase--interactive.sh.
Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This rewrites the part of interactive rebase which initializes the
basic state, make the script and complete the action, as a buitin, named
git-rebase--interactive2 for now. Others modes (`--continue`,
`--edit-todo`, etc.) will be rewritten in the next commit.
git-rebase--interactive.sh is modified to call git-rebase--interactive2
instead of git-rebase--helper.
Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This rewrites init_basic_state() from shell to C. The call to
write_basic_state() in cmd_rebase__helper() is replaced by a call to the
new function.
The shell version is then stripped from git-rebase--interactive.sh.
Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This rewrites write_basic_state() from git-rebase.sh in C. This is the
first step in the conversion of init_basic_state(), hence the mode in
rebase--helper.c is called INIT_BASIC_STATE. init_basic_state() will be
converted in the next commit.
The part of read_strategy_opts() that parses the stategy options is
moved to a new function to allow its use in rebase--helper.c.
Finally, the call to write_basic_state() is removed from
git-rebase--interactive.sh, replaced by a call to `--init-basic-state`.
Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This rewrites the part of init_revisions_and_shortrevisions() needed by
`--complete-action` (which initialize $shortrevisions) from shell to C.
When `upstream` is empty, it means that the user launched a `rebase
--root`, and `onto` contains the ID of an empty commit. As a range
between an empty commit and `head` is not really meaningful, `onto` is
not used to initialize `shortrevisions` in this case.
The corresponding arguments passed to `--complete-action` are then
dropped, and init_revisions_and_shortrevisions() is stripped from
git-rebase--interactive.sh
Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This rewrites the part of init_revisions_and_shortrevisions() needed by
`--make-script` from shell to C. The new version is called
get_revision_ranges(), and is a static function inside of
rebase--helper.c. As this does not initialize $shortrevision, the
original shell version is not yet stripped.
Unlike init_revisions_and_shortrevisions(), get_revision_ranges()
doesn’t write $squash_onto to the state directory, it’s done by the
handler of `--make-script` instead.
Finally, this drops the $revision argument passed to `--make-script` in
git-rebase--interactive.sh, and rebase--helper is changed accordingly.
Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This removes the modes `--skip-unnecessary-picks`, `--append-todo-help`,
and `--checkout-onto` from rebase--helper.c, the functions of
git-rebase--interactive.sh that were rendered useless by the rewrite of
complete_action(), and append_todo_help_to_file() from
rebase-interactive.c.
skip_unnecessary_picks() and checkout_onto() becomes static, as they are
only used inside of the sequencer.
Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This rewrites complete_action() from shell to C.
A new mode is added to rebase--helper (`--complete-action`), as well as
a new flag (`--autosquash`).
Finally, complete_action() is stripped from git-rebase--interactive.sh.
The original complete_action() would return the code 2 when the todo
list contained no actions. This was a special case for rebase -i and
-p; git-rebase.sh would then apply the autostash, delete the state
directory, and die with the message "Nothing to do". This cleanup is
rewritten in C instead of returning 2. As rebase -i no longer returns
2, the comment describing this behaviour in git-rebase.sh is updated to
reflect this change.
The message "Nothing to do" is now printed with error(), and so becomes
"error: nothing to do". Some tests in t3404 check this value, so they
are updated to fit this change.
The first check might seem useless as we write "noop" to the todo list
if it is empty. Actually, the todo list might contain commented
commands (ie. empty commits). In this case, complete_action() won’t
write "noop", and will abort without starting the editor.
Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
If the todo list generated by `--make-script` is empty,
complete_action() writes a noop, but if it has only commented-out
commands, it will abort with the message "Nothing to do", and does not
launch the editor. This adds a new test to ensure that
complete_action() behaves this way.
Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Instead of skip_unnecessary_picks() printing its result to stdout, it
returns it into a struct object_id, as the rewrite of complete_action()
(to come in the next commit) will need it.
rebase--helper then is modified to fit this change.
Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This refactors append_todo_help() to write its message to a buffer
instead of the todo-list. This is needed for the rewrite of
complete_action(), which will come after the next commit.
As rebase--helper still needs the file manipulation part of
append_todo_help(), it is extracted to a temporary function,
append_todo_help_to_file(). This function will go away after the
rewrite of complete_action().
Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This rewrites checkout_onto() from shell to C.
A new command (“checkout-onto”) is added to rebase--helper.c. The shell
version is then stripped.
Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This rewrites (the misnamed) setup_reflog_action() from shell to C. The
new version is called prepare_branch_to_be_rebased().
A new command is added to rebase--helper.c, “checkout-base”, as well as
a new flag, “verbose”, to avoid silencing the output of the checkout
operation called by checkout_base_commit().
The function `run_git_checkout()` will also be used in the next commit,
therefore its code is not part of `checkout_base_commit()`.
The shell version is then stripped in favour of a call to the helper.
As $GIT_REFLOG_ACTION is no longer set at the first call of
checkout_onto(), a call to comment_for_reflog() is added at the
beginning of this function.
Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This adds a new function, run_command_silent_on_success(), to
redirect the stdout and stderr of a command to a strbuf, and then to run
that command. This strbuf is printed only if the command fails. It is
functionnaly similar to output() from git-rebase.sh.
run_git_commit() is then refactored to use of
run_command_silent_on_success().
Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
While working on the GSoC project to convert the rebase command to a
builtin, the rebase command learned to error out on certain command-line
option combinations that cannot work, such as --whitespace=fix with
--interactive.
This commit converts that code.
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This rewrites the edit-todo functionality from shell to C.
To achieve that, a new command mode, `edit-todo`, is added, and the
`write-edit-todo` flag is removed, as the shell script does not need to
write the edit todo help message to the todo list anymore.
The shell version is then stripped in favour of a call to the helper.
Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some options are only handled by the git-rebase--interactive backend,
even if run non-interactively. For this awkward situation (run
non-interactively, but use the interactive backend), the shell scripted
version of `git rebase` introduced the concept of an "implied
interactive rebase". All it does is to replace the editor by a dummy one
(`:` is the Unix command that takes arbitrary command-line parameters,
ignores them and simply exits with success).
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
As part of the rewrite of interactive rebase, the sequencer will need to
open the sequence editor to allow the user to edit the todo list.
Instead of duplicating the existing launch_editor() function, this
refactors it to a new function, launch_specified_editor(), which takes
the editor as a parameter, in addition to the path, the buffer and the
environment variables. launch_sequence_editor() is then added to launch
the sequence editor.
Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In this commit, we pass `--progress` to the `format-patch` command if
stderr is connected to an interactive terminal, unless we're in quiet
mode.
This `--progress` option will be used in `format-patch` to show progress
reports on stderr as patches are generated.
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This rewrites append_todo_help() from shell to C. It also incorporates
some parts of initiate_action() and complete_action() that also write
help texts to the todo file.
This also introduces the source file rebase-interactive.c. This file
will contain functions necessary for interactive rebase that are too
specific for the sequencer, and is part of libgit.a.
Two flags are added to rebase--helper.c: one to call
append_todo_help() (`--append-todo-help`), and another one to tell
append_todo_help() to write the help text suited for the edit-todo
mode (`--write-edit-todo`).
Finally, append_todo_help() is removed from git-rebase--interactive.sh
to use `rebase--helper --append-todo-help` instead.
Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When trying to rebase onto a direct descendant of HEAD, we can
take a shortcut and fast-forward instead. This commit makes it so.
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This makes rebase_path_todo(), get_missing_commit_check_level(),
write_message() and the enum check_level accessible outside sequencer.c,
renames check_level to missing_commit_check_level, and prefixes its
value names by MISSING_COMMIT_ to avoid namespace pollution.
This function and this enum will eventually be moved to
rebase-interactive.c and become static again, so no special attention
was given to the naming.
This will be needed for the rewrite of append_todo_help() from shell to
C, as it will be in a new library source file, rebase-interactive.c.
Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In the next patch, we will make use of that in the code that
fast-forwards to `onto` whenever possible.
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The `git rebase` command, when called without the `<upstream>`
command-line argument, automatically looks for the upstream
branch configured for the current branch.
With this commit, the builtin rebase learned that trick, too.
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This option allows to rebase entire histories up to, and including, the
root commit.
The conversion from the shell script is straight-forward, apart from
the fact that we do not have to write an empty tree in C.
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When running a rebase in non-am mode, it uses the recursive merge to
cherry-pick the commits, and the rebase command allows to configure
the merge strategy to be used in this operation.
This commit adds that support to the builtin rebase.
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit adds support for `--fork-point` and `--no-fork-point`.
This is converted as-is from `git-legacy-rebase.sh`.
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We need this functionality in the builtin rebase.
Note: to make this function truly reusable, we have to switch the call
get_merges_many_dirty() to get_merges_many() because we want the commit
flags to be reset (otherwise, subsequent get_merge_bases() calls would
obtain incorrect results). This did not matter when the function was
called in `git rev-parse --fork-point` because in that command, the
process definitely did not traverse any commits before exiting.
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit introduces the `--allow-empty-message` option to
`builtin/rebase.c`. The motivation behind this option is: if there are
empty messages (which is not allowed in Git by default, but can be
imported from different version control systems), the rebase will fail.
Using `--allow-empty-message` overrides that behaviour which will allow
the commits having empty messages to continue in rebase operation.
Note: a very recent change made this the default in the shell scripted
`git rebase`, therefore the builtin rebase does the same.
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit adds support for the `--exec` option which takes a shell
command-line as argument. This argument will be appended as an `exec
<cmd>` command after each line in the todo list that creates a commit in
the final history. commands.
Note: while the shell script version of `git rebase` assigned the empty
string to `cmd` by default, we *unset* it here because the code looks
nicer and it does not change the behavior.
The `--exec` option requires `--interactive` machinery.
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
To support `--autostash` we introduce a function `apply_autostash()`
just like in `git-legacy-rebase.sh`.
Rather than refactoring and using the same function that exists in
`sequencer.c`, we go a different route here, to avoid clashes with
the sister GSoC project that turns the interactive rebase into a
builtin.
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit converts more code from the shell script version to the
builtin rebase. In this instance, we just have to be careful to
keep support for passing multiple `--whitespace` options, as the
shell script version does so, too.
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
This commit introduces support for `--gpg-sign` option which is used
to GPG-sign commits.
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
This commit adds support for the `--autosquash` option which is used to
automatically squash the commits marked as `squash` or `fixup` in their
messages. This is converted following `git-legacy-rebase.sh` closely.
This option can also be configured via the Git config setting
rebase.autosquash. To support this, we also add a custom
rebase_config() function in this commit that will be used instead (and
falls back to) git_default_config().
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The `--keep-empty` option can be used to keep the commits that do not
change anything from its parents in the result.
While the scripted version uses `interactive_rebase=implied` to indicate
that the rebase needs to use the `git-rebase--interactive` backend in
non-interactive mode as fallback when figuring out which backend to use,
the C version needs to use a different route because the backend will
already be chosen during the `parse_options()` call.
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit adds support for `--ignore-date` which is passed to `git am`
to easily change the dates of the rebased commits.
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit adds support for the `--ignore-whitespace` option
of the rebase command. This option is simply passed to the
`--am` backend.
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This option is simply handed down to `git am` by way of setting the
`git_am_opt` variable that is handled by the `git-rebase--am` backend.
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The `--rerere-autoupdate` option allows rerere to update the index with
resolved conflicts. This commit follows closely the equivalent part of
`git-legacy-rebase.sh`.
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
