.. _git_revise:

=========================================================================
``git-revise(1)`` -- Efficiently update, split, and rearrange git commits
=========================================================================

.. program:: git revise:

SYNOPSIS
========

*git revise* [<options>] [<target>]

DESCRIPTION
===========

:program:`git revise` is a :manpage:`git(1)` subcommand to efficiently
update, split, and rearrange commits. It is heavily inspired by
:manpage:`git-rebase(1)`, however tries to be more efficient and ergonomic for
patch-stack oriented workflows.

By default, :program:`git revise` will apply staged changes to <target>,
updating ``HEAD`` to point at the revised history. It also supports splitting
commits, rewording commit messages.

Unlike :manpage:`git-rebase(1)`, :program:`git revise` avoids modifying
working directory and index state, performing all merges in-memory, and only
writing them when necessary. This allows it to be significantly faster on
large codebases, and avoid invalidating builds.

If :option:`--autosquash` or :option:`--interactive` is specified, the
<target> argument is optional. If it is omitted, :program:`git revise` will
consider a range of unpublished commits on the current branch.

OPTIONS
=======

General options
---------------

.. option:: -a, --all

   Stage changes to tracked files before revising.

.. option:: --no-index

   Ignore staged changes in the index.

.. option:: --reauthor

   Reset target commit's author to the current user.

.. option:: --ref <gitref>

   Working branch to update; defaults to ``HEAD``.

Main modes of operation
-----------------------

.. option:: -i, --interactive

   Rather than applying staged changes to <target>, edit a todo list of
   actions to perform on commits after <target>. See :ref:`interactive-mode`.

.. option:: --autosquash, --no-autosquash

   Rather than directly applying staged changes to <target>, automatically
   perform fixup or squash actions marked with ``fixup!`` or ``squash!``
   between <target> and the current ``HEAD``. For more information on what
   these actions do, see :ref:`interactive-mode`.

   These commits are usually created with ``git commit --fixup=<commit>`` or
   ``git commit --squash=<commit>``, and identify the target with the first
   line of its commit message.

   This option can be combined with :option:`--interactive` to modify the
   generated todos before they're executed.

   If the :option:`--autosquash` option is enabled by default using a
   configuration variable, the option :option:`--no-autosquash` can be used
   to override and disable this setting. See :ref:`configuration`.

.. option:: -c, --cut

   Interactively select hunks from <target>. The chosen hunks are split into
   a second commit immediately after the target.

   After splitting is complete, both commits' messages are edited.

   See the "Interactive Mode" section of :manpage:`git-add(1)` to learn how
   to operate this mode.

.. option:: -e, --edit

   After applying staged changes, edit <target>'s commit message.

   This option can be combined with :option:`--interactive` to allow editing
   of commit messages within the todo list. For more information on, see
   :ref:`interactive-mode`.

.. option:: -m <msg>, --message <msg>

   Use the given <msg> as the new commit message for <target>. If multiple
   :option:`-m` options are given, their values are concatenated as separate
   paragraphs.

.. option:: --version

   Print version information and exit.


.. _configuration:

CONFIGURATION
=============

Configuration is managed by :manpage:`git-config(1)`.

.. gitconfig:: revise.autoSquash

   If set to true, imply :option:`--autosquash` whenever :option:`--interactive`
   is specified. Overridden by :option:`--no-autosquash`. Defaults to false. If
   not set, the value of ``rebase.autoSquash`` is used instead.


CONFLICT RESOLUTION
===================

When a conflict is encountered, :command:`git revise` will attempt to resolve
it automatically using standard git mechanisms. If automatic resolution
fails, the user will be prompted to resolve them manually.

There is currently no support for using :manpage:`git-mergetool(1)` to
resolve conflicts.

No attempt is made to detect renames of files or directories. :command:`git
revise` may produce suboptimal results across renames. Use the interactive
mode of :manpage:`git-rebase(1)` when rename tracking is important.


NOTES
=====

A successful :command:`git revise` will add a single entry to the reflog,
allowing it to be undone with ``git reset @{1}``. Unsuccessful :command:`git
revise` commands will leave your repository largely unmodified.

No merge commits may occur between the target commit and ``HEAD``, as
rewriting them is not supported.

See :manpage:`git-rebase(1)` for more information on the implications of
modifying history on a repository that you share.


.. _interactive-mode:

INTERACTIVE MODE
================

:command:`git revise` supports an interactive mode inspired by the
interactive mode of :manpage:`git-rebase(1)`.

This mode is started with the last commit you want to retain "as-is":

.. code-block:: bash

    git revise -i <after-this-commit>

An editor will be fired up with the commits in your current branch after the
given commit. If the index has any staged but uncommitted changes, a ``<git
index>`` entry will also be present.

.. code-block:: none

    pick 8338dfa88912 Oneline summary of first commit
    pick 735609912343 Summary of second commit
    index 672841329981 <git index>

These commits may be re-ordered to change the order they appear in history.
In addition, the ``pick`` and ``index`` commands may be replaced to modify
their behaviour.

If :option:`-e` was specified, the full commit message will be included, and
each command line will begin with a ``++``. Any changes made to the commit
messages in this file will be applied to the commit in question, allowing for
simultaneous editing of commit messages during the todo editing phase.

.. code-block:: none

    ++ pick 8338dfa88912
    Oneline summary of first commit

    Body of first commit

    ++ pick 735609912343
    Summary of second commit

    Body of second commit

    ++ index 672841329981
    <git index>

The following commands are supported in all interactive modes:

.. describe:: index

   Do not commit these changes, instead leaving them staged in the index.
   Index lines must come last in the file.

   .. note:
      Commits deleted from the to-do list are treated as an index action. To
      completely discard changes, additionally use :manpage:`git-reset(1)` to
      discard the changes to the index.

.. describe:: pick

   Use the given commit as-is in history. When applied to the generated
   ``index`` entry, the commit will have the message ``<git index>``.


.. describe:: fixup

   Add the commit's changes into the previous commit, discarding its commit
   message.

.. describe:: squash

   Like fixup, but also open an editor to merge the commits' messages.

.. describe:: reword

   Open an editor to modify the commit message.

.. describe:: cut

   Interactively select hunks from the commit. The chosen hunks are split
   into a second commit immediately after it.

   After splitting is complete, both commits' messages are edited.

   See the "Interactive Mode" section of :manpage:`git-add(1)` to learn how
   to operate this mode.


REPORTING BUGS
==============

Please report issues and feature requests to the issue tracker at
https://github.com/mystor/git-revise/issues.

Code, documentation and other contributions are also welcomed.


SEE ALSO
========

:manpage:`git(1)`
:manpage:`git-rebase(1)`
:manpage:`git-add(1)`
