Merge branch 'ds/git-rebase-doc-markup' into maint

References to commands-to-be-typed-literally in "git rebase"
documentation mark-up have been corrected.
source: <pull.1270.v3.git.1656508868146.gitgitgadget@gmail.com>

* ds/git-rebase-doc-markup:
  git-rebase.txt: use back-ticks consistently
This commit is contained in:
Junio C Hamano
2022-07-27 13:00:29 -07:00

View File

@ -16,40 +16,40 @@ SYNOPSIS
DESCRIPTION DESCRIPTION
----------- -----------
If <branch> is specified, 'git rebase' will perform an automatic If `<branch>` is specified, `git rebase` will perform an automatic
`git switch <branch>` before doing anything else. Otherwise `git switch <branch>` before doing anything else. Otherwise
it remains on the current branch. it remains on the current branch.
If <upstream> is not specified, the upstream configured in If `<upstream>` is not specified, the upstream configured in
branch.<name>.remote and branch.<name>.merge options will be used (see `branch.<name>.remote` and `branch.<name>.merge` options will be used (see
linkgit:git-config[1] for details) and the `--fork-point` option is linkgit:git-config[1] for details) and the `--fork-point` option is
assumed. If you are currently not on any branch or if the current assumed. If you are currently not on any branch or if the current
branch does not have a configured upstream, the rebase will abort. branch does not have a configured upstream, the rebase will abort.
All changes made by commits in the current branch but that are not All changes made by commits in the current branch but that are not
in <upstream> are saved to a temporary area. This is the same set in `<upstream>` are saved to a temporary area. This is the same set
of commits that would be shown by `git log <upstream>..HEAD`; or by of commits that would be shown by `git log <upstream>..HEAD`; or by
`git log 'fork_point'..HEAD`, if `--fork-point` is active (see the `git log 'fork_point'..HEAD`, if `--fork-point` is active (see the
description on `--fork-point` below); or by `git log HEAD`, if the description on `--fork-point` below); or by `git log HEAD`, if the
`--root` option is specified. `--root` option is specified.
The current branch is reset to <upstream>, or <newbase> if the The current branch is reset to `<upstream>` or `<newbase>` if the
--onto option was supplied. This has the exact same effect as `--onto` option was supplied. This has the exact same effect as
`git reset --hard <upstream>` (or <newbase>). ORIG_HEAD is set `git reset --hard <upstream>` (or `<newbase>`). `ORIG_HEAD` is set
to point at the tip of the branch before the reset. to point at the tip of the branch before the reset.
The commits that were previously saved into the temporary area are The commits that were previously saved into the temporary area are
then reapplied to the current branch, one by one, in order. Note that then reapplied to the current branch, one by one, in order. Note that
any commits in HEAD which introduce the same textual changes as a commit any commits in `HEAD` which introduce the same textual changes as a commit
in HEAD..<upstream> are omitted (i.e., a patch already accepted upstream in `HEAD..<upstream>` are omitted (i.e., a patch already accepted upstream
with a different commit message or timestamp will be skipped). with a different commit message or timestamp will be skipped).
It is possible that a merge failure will prevent this process from being It is possible that a merge failure will prevent this process from being
completely automatic. You will have to resolve any such merge failure completely automatic. You will have to resolve any such merge failure
and run `git rebase --continue`. Another option is to bypass the commit and run `git rebase --continue`. Another option is to bypass the commit
that caused the merge failure with `git rebase --skip`. To check out the that caused the merge failure with `git rebase --skip`. To check out the
original <branch> and remove the .git/rebase-apply working files, use the original `<branch>` and remove the `.git/rebase-apply` working files, use
command `git rebase --abort` instead. the command `git rebase --abort` instead.
Assume the following history exists and the current branch is "topic": Assume the following history exists and the current branch is "topic":
@ -79,7 +79,7 @@ remain the checked-out branch.
If the upstream branch already contains a change you have made (e.g., If the upstream branch already contains a change you have made (e.g.,
because you mailed a patch which was applied upstream), then that commit because you mailed a patch which was applied upstream), then that commit
will be skipped and warnings will be issued (if the `merge` backend is will be skipped and warnings will be issued (if the 'merge' backend is
used). For example, running `git rebase master` on the following used). For example, running `git rebase master` on the following
history (in which `A'` and `A` introduce the same set of changes, but history (in which `A'` and `A` introduce the same set of changes, but
have different committer information): have different committer information):
@ -176,11 +176,11 @@ would result in the removal of commits F and G:
------------ ------------
This is useful if F and G were flawed in some way, or should not be This is useful if F and G were flawed in some way, or should not be
part of topicA. Note that the argument to --onto and the <upstream> part of topicA. Note that the argument to `--onto` and the `<upstream>`
parameter can be any valid commit-ish. parameter can be any valid commit-ish.
In case of conflict, 'git rebase' will stop at the first problematic commit In case of conflict, `git rebase` will stop at the first problematic commit
and leave conflict markers in the tree. You can use 'git diff' to locate and leave conflict markers in the tree. You can use `git diff` to locate
the markers (<<<<<<) and make edits to resolve the conflict. For each the markers (<<<<<<) and make edits to resolve the conflict. For each
file you edit, you need to tell Git that the conflict has been resolved, file you edit, you need to tell Git that the conflict has been resolved,
typically this would be done with typically this would be done with
@ -205,8 +205,8 @@ OPTIONS
------- -------
--onto <newbase>:: --onto <newbase>::
Starting point at which to create the new commits. If the Starting point at which to create the new commits. If the
--onto option is not specified, the starting point is `--onto` option is not specified, the starting point is
<upstream>. May be any valid commit, and not just an `<upstream>`. May be any valid commit, and not just an
existing branch name. existing branch name.
+ +
As a special case, you may use "A\...B" as a shortcut for the As a special case, you may use "A\...B" as a shortcut for the
@ -215,19 +215,19 @@ leave out at most one of A and B, in which case it defaults to HEAD.
--keep-base:: --keep-base::
Set the starting point at which to create the new commits to the Set the starting point at which to create the new commits to the
merge base of <upstream> and <branch>. Running merge base of `<upstream>` and `<branch>`. Running
'git rebase --keep-base <upstream> <branch>' is equivalent to `git rebase --keep-base <upstream> <branch>` is equivalent to
running running
'git rebase --onto <upstream>...<branch> <upstream> <branch>'. `git rebase --onto <upstream>...<branch> <upstream> <branch>`.
+ +
This option is useful in the case where one is developing a feature on This option is useful in the case where one is developing a feature on
top of an upstream branch. While the feature is being worked on, the top of an upstream branch. While the feature is being worked on, the
upstream branch may advance and it may not be the best idea to keep upstream branch may advance and it may not be the best idea to keep
rebasing on top of the upstream but to keep the base commit as-is. rebasing on top of the upstream but to keep the base commit as-is.
+ +
Although both this option and --fork-point find the merge base between Although both this option and `--fork-point` find the merge base between
<upstream> and <branch>, this option uses the merge base as the _starting `<upstream>` and `<branch>`, this option uses the merge base as the _starting
point_ on which new commits will be created, whereas --fork-point uses point_ on which new commits will be created, whereas `--fork-point` uses
the merge base to determine the _set of commits_ which will be rebased. the merge base to determine the _set of commits_ which will be rebased.
+ +
See also INCOMPATIBLE OPTIONS below. See also INCOMPATIBLE OPTIONS below.
@ -238,23 +238,23 @@ See also INCOMPATIBLE OPTIONS below.
upstream for the current branch. upstream for the current branch.
<branch>:: <branch>::
Working branch; defaults to HEAD. Working branch; defaults to `HEAD`.
--continue:: --continue::
Restart the rebasing process after having resolved a merge conflict. Restart the rebasing process after having resolved a merge conflict.
--abort:: --abort::
Abort the rebase operation and reset HEAD to the original Abort the rebase operation and reset HEAD to the original
branch. If <branch> was provided when the rebase operation was branch. If `<branch>` was provided when the rebase operation was
started, then HEAD will be reset to <branch>. Otherwise HEAD started, then `HEAD` will be reset to `<branch>`. Otherwise `HEAD`
will be reset to where it was when the rebase operation was will be reset to where it was when the rebase operation was
started. started.
--quit:: --quit::
Abort the rebase operation but HEAD is not reset back to the Abort the rebase operation but `HEAD` is not reset back to the
original branch. The index and working tree are also left original branch. The index and working tree are also left
unchanged as a result. If a temporary stash entry was created unchanged as a result. If a temporary stash entry was created
using --autostash, it will be saved to the stash list. using `--autostash`, it will be saved to the stash list.
--apply:: --apply::
Use applying strategies to rebase (calling `git-am` Use applying strategies to rebase (calling `git-am`
@ -269,16 +269,16 @@ See also INCOMPATIBLE OPTIONS below.
empty after rebasing (because they contain a subset of already empty after rebasing (because they contain a subset of already
upstream changes). With drop (the default), commits that upstream changes). With drop (the default), commits that
become empty are dropped. With keep, such commits are kept. become empty are dropped. With keep, such commits are kept.
With ask (implied by --interactive), the rebase will halt when With ask (implied by `--interactive`), the rebase will halt when
an empty commit is applied allowing you to choose whether to an empty commit is applied allowing you to choose whether to
drop it, edit files more, or just commit the empty changes. drop it, edit files more, or just commit the empty changes.
Other options, like --exec, will use the default of drop unless Other options, like `--exec`, will use the default of drop unless
-i/--interactive is explicitly specified. `-i`/`--interactive` is explicitly specified.
+ +
Note that commits which start empty are kept (unless --no-keep-empty Note that commits which start empty are kept (unless `--no-keep-empty`
is specified), and commits which are clean cherry-picks (as determined is specified), and commits which are clean cherry-picks (as determined
by `git log --cherry-mark ...`) are detected and dropped as a by `git log --cherry-mark ...`) are detected and dropped as a
preliminary step (unless --reapply-cherry-picks is passed). preliminary step (unless `--reapply-cherry-picks` is passed).
+ +
See also INCOMPATIBLE OPTIONS below. See also INCOMPATIBLE OPTIONS below.
@ -287,7 +287,7 @@ See also INCOMPATIBLE OPTIONS below.
Do not keep commits that start empty before the rebase Do not keep commits that start empty before the rebase
(i.e. that do not change anything from its parent) in the (i.e. that do not change anything from its parent) in the
result. The default is to keep commits which start empty, result. The default is to keep commits which start empty,
since creating such commits requires passing the --allow-empty since creating such commits requires passing the `--allow-empty`
override flag to `git commit`, signifying that a user is very override flag to `git commit`, signifying that a user is very
intentionally creating such a commit and thus wants to keep intentionally creating such a commit and thus wants to keep
it. it.
@ -299,7 +299,7 @@ flag exists as a convenient shortcut, such as for cases where external
tools generate many empty commits and you want them all removed. tools generate many empty commits and you want them all removed.
+ +
For commits which do not start empty but become empty after rebasing, For commits which do not start empty but become empty after rebasing,
see the --empty flag. see the `--empty` flag.
+ +
See also INCOMPATIBLE OPTIONS below. See also INCOMPATIBLE OPTIONS below.
@ -314,7 +314,7 @@ See also INCOMPATIBLE OPTIONS below.
By default (or if `--no-reapply-cherry-picks` is given), these commits By default (or if `--no-reapply-cherry-picks` is given), these commits
will be automatically dropped. Because this necessitates reading all will be automatically dropped. Because this necessitates reading all
upstream commits, this can be expensive in repos with a large number upstream commits, this can be expensive in repos with a large number
of upstream commits that need to be read. When using the `merge` of upstream commits that need to be read. When using the 'merge'
backend, warnings will be issued for each dropped commit (unless backend, warnings will be issued for each dropped commit (unless
`--quiet` is given). Advice will also be issued unless `--quiet` is given). Advice will also be issued unless
`advice.skippedCherryPicks` is set to false (see linkgit:git-config[1]). `advice.skippedCherryPicks` is set to false (see linkgit:git-config[1]).
@ -348,10 +348,10 @@ See also INCOMPATIBLE OPTIONS below.
Using merging strategies to rebase (default). Using merging strategies to rebase (default).
+ +
Note that a rebase merge works by replaying each commit from the working Note that a rebase merge works by replaying each commit from the working
branch on top of the <upstream> branch. Because of this, when a merge branch on top of the `<upstream>` branch. Because of this, when a merge
conflict happens, the side reported as 'ours' is the so-far rebased conflict happens, the side reported as 'ours' is the so-far rebased
series, starting with <upstream>, and 'theirs' is the working branch. In series, starting with `<upstream>`, and 'theirs' is the working branch.
other words, the sides are swapped. In other words, the sides are swapped.
+ +
See also INCOMPATIBLE OPTIONS below. See also INCOMPATIBLE OPTIONS below.
@ -360,9 +360,9 @@ See also INCOMPATIBLE OPTIONS below.
Use the given merge strategy, instead of the default `ort`. Use the given merge strategy, instead of the default `ort`.
This implies `--merge`. This implies `--merge`.
+ +
Because 'git rebase' replays each commit from the working branch Because `git rebase` replays each commit from the working branch
on top of the <upstream> branch using the given strategy, using on top of the `<upstream>` branch using the given strategy, using
the 'ours' strategy simply empties all patches from the <branch>, the `ours` strategy simply empties all patches from the `<branch>`,
which makes little sense. which makes little sense.
+ +
See also INCOMPATIBLE OPTIONS below. See also INCOMPATIBLE OPTIONS below.
@ -392,11 +392,11 @@ See also INCOMPATIBLE OPTIONS below.
-q:: -q::
--quiet:: --quiet::
Be quiet. Implies --no-stat. Be quiet. Implies `--no-stat`.
-v:: -v::
--verbose:: --verbose::
Be verbose. Implies --stat. Be verbose. Implies `--stat`.
--stat:: --stat::
Show a diffstat of what changed upstream since the last rebase. The Show a diffstat of what changed upstream since the last rebase. The
@ -411,13 +411,13 @@ See also INCOMPATIBLE OPTIONS below.
--verify:: --verify::
Allows the pre-rebase hook to run, which is the default. This option can Allows the pre-rebase hook to run, which is the default. This option can
be used to override --no-verify. See also linkgit:githooks[5]. be used to override `--no-verify`. See also linkgit:githooks[5].
-C<n>:: -C<n>::
Ensure at least <n> lines of surrounding context match before Ensure at least `<n>` lines of surrounding context match before
and after each change. When fewer lines of surrounding and after each change. When fewer lines of surrounding
context exist they all must match. By default no context is context exist they all must match. By default no context is
ever ignored. Implies --apply. ever ignored. Implies `--apply`.
+ +
See also INCOMPATIBLE OPTIONS below. See also INCOMPATIBLE OPTIONS below.
@ -436,21 +436,21 @@ details).
--fork-point:: --fork-point::
--no-fork-point:: --no-fork-point::
Use reflog to find a better common ancestor between <upstream> Use reflog to find a better common ancestor between `<upstream>`
and <branch> when calculating which commits have been and `<branch>` when calculating which commits have been
introduced by <branch>. introduced by `<branch>`.
+ +
When --fork-point is active, 'fork_point' will be used instead of When `--fork-point` is active, 'fork_point' will be used instead of
<upstream> to calculate the set of commits to rebase, where `<upstream>` to calculate the set of commits to rebase, where
'fork_point' is the result of `git merge-base --fork-point <upstream> 'fork_point' is the result of `git merge-base --fork-point <upstream>
<branch>` command (see linkgit:git-merge-base[1]). If 'fork_point' <branch>` command (see linkgit:git-merge-base[1]). If 'fork_point'
ends up being empty, the <upstream> will be used as a fallback. ends up being empty, the `<upstream>` will be used as a fallback.
+ +
If <upstream> is given on the command line, then the default is If `<upstream>` is given on the command line, then the default is
`--no-fork-point`, otherwise the default is `--fork-point`. See also `--no-fork-point`, otherwise the default is `--fork-point`. See also
`rebase.forkpoint` in linkgit:git-config[1]. `rebase.forkpoint` in linkgit:git-config[1].
+ +
If your branch was based on <upstream> but <upstream> was rewound and If your branch was based on `<upstream>` but `<upstream>` was rewound and
your branch contains commits which were dropped, this option can be used your branch contains commits which were dropped, this option can be used
with `--keep-base` in order to drop those commits from your branch. with `--keep-base` in order to drop those commits from your branch.
+ +
@ -458,24 +458,26 @@ See also INCOMPATIBLE OPTIONS below.
--ignore-whitespace:: --ignore-whitespace::
Ignore whitespace differences when trying to reconcile Ignore whitespace differences when trying to reconcile
differences. Currently, each backend implements an approximation of differences. Currently, each backend implements an approximation of
this behavior: this behavior:
+ +
apply backend: When applying a patch, ignore changes in whitespace in apply backend;;
context lines. Unfortunately, this means that if the "old" lines being When applying a patch, ignore changes in whitespace in context
replaced by the patch differ only in whitespace from the existing lines. Unfortunately, this means that if the "old" lines being
file, you will get a merge conflict instead of a successful patch replaced by the patch differ only in whitespace from the existing
application. file, you will get a merge conflict instead of a successful patch
application.
+ +
merge backend: Treat lines with only whitespace changes as unchanged merge backend;;
when merging. Unfortunately, this means that any patch hunks that were Treat lines with only whitespace changes as unchanged when merging.
intended to modify whitespace and nothing else will be dropped, even Unfortunately, this means that any patch hunks that were intended
if the other side had no changes that conflicted. to modify whitespace and nothing else will be dropped, even if the
other side had no changes that conflicted.
--whitespace=<option>:: --whitespace=<option>::
This flag is passed to the 'git apply' program This flag is passed to the `git apply` program
(see linkgit:git-apply[1]) that applies the patch. (see linkgit:git-apply[1]) that applies the patch.
Implies --apply. Implies `--apply`.
+ +
See also INCOMPATIBLE OPTIONS below. See also INCOMPATIBLE OPTIONS below.
@ -537,7 +539,7 @@ See also REBASING MERGES and INCOMPATIBLE OPTIONS below.
-x <cmd>:: -x <cmd>::
--exec <cmd>:: --exec <cmd>::
Append "exec <cmd>" after each line creating a commit in the Append "exec <cmd>" after each line creating a commit in the
final history. <cmd> will be interpreted as one or more shell final history. `<cmd>` will be interpreted as one or more shell
commands. Any command that fails will interrupt the rebase, commands. Any command that fails will interrupt the rebase,
with exit code 1. with exit code 1.
+ +
@ -550,7 +552,7 @@ or by giving more than one `--exec`:
+ +
git rebase -i --exec "cmd1" --exec "cmd2" --exec ... git rebase -i --exec "cmd1" --exec "cmd2" --exec ...
+ +
If `--autosquash` is used, "exec" lines will not be appended for If `--autosquash` is used, `exec` lines will not be appended for
the intermediate commits, and will only appear at the end of each the intermediate commits, and will only appear at the end of each
squash/fixup series. squash/fixup series.
+ +
@ -560,11 +562,12 @@ without an explicit `--interactive`.
See also INCOMPATIBLE OPTIONS below. See also INCOMPATIBLE OPTIONS below.
--root:: --root::
Rebase all commits reachable from <branch>, instead of Rebase all commits reachable from `<branch>`, instead of
limiting them with an <upstream>. This allows you to rebase limiting them with an `<upstream>`. This allows you to rebase
the root commit(s) on a branch. When used with --onto, it the root commit(s) on a branch. When used with `--onto`, it
will skip changes already contained in <newbase> (instead of will skip changes already contained in `<newbase>` (instead of
<upstream>) whereas without --onto it will operate on every change. `<upstream>`) whereas without `--onto` it will operate on every
change.
+ +
See also INCOMPATIBLE OPTIONS below. See also INCOMPATIBLE OPTIONS below.
@ -643,9 +646,9 @@ In addition, the following pairs of options are incompatible:
BEHAVIORAL DIFFERENCES BEHAVIORAL DIFFERENCES
----------------------- -----------------------
git rebase has two primary backends: apply and merge. (The apply `git rebase` has two primary backends: 'apply' and 'merge'. (The 'apply'
backend used to be known as the 'am' backend, but the name led to backend used to be known as the 'am' backend, but the name led to
confusion as it looks like a verb instead of a noun. Also, the merge confusion as it looks like a verb instead of a noun. Also, the 'merge'
backend used to be known as the interactive backend, but it is now backend used to be known as the interactive backend, but it is now
used for non-interactive cases as well. Both were renamed based on used for non-interactive cases as well. Both were renamed based on
lower-level functionality that underpinned each.) There are some lower-level functionality that underpinned each.) There are some
@ -654,19 +657,19 @@ subtle differences in how these two backends behave:
Empty commits Empty commits
~~~~~~~~~~~~~ ~~~~~~~~~~~~~
The apply backend unfortunately drops intentionally empty commits, i.e. The 'apply' backend unfortunately drops intentionally empty commits, i.e.
commits that started empty, though these are rare in practice. It commits that started empty, though these are rare in practice. It
also drops commits that become empty and has no option for controlling also drops commits that become empty and has no option for controlling
this behavior. this behavior.
The merge backend keeps intentionally empty commits by default (though The 'merge' backend keeps intentionally empty commits by default (though
with -i they are marked as empty in the todo list editor, or they can with `-i` they are marked as empty in the todo list editor, or they can
be dropped automatically with --no-keep-empty). be dropped automatically with `--no-keep-empty`).
Similar to the apply backend, by default the merge backend drops Similar to the apply backend, by default the merge backend drops
commits that become empty unless -i/--interactive is specified (in commits that become empty unless `-i`/`--interactive` is specified (in
which case it stops and asks the user what to do). The merge backend which case it stops and asks the user what to do). The merge backend
also has an --empty={drop,keep,ask} option for changing the behavior also has an `--empty={drop,keep,ask}` option for changing the behavior
of handling commits that become empty. of handling commits that become empty.
Directory rename detection Directory rename detection
@ -674,20 +677,20 @@ Directory rename detection
Due to the lack of accurate tree information (arising from Due to the lack of accurate tree information (arising from
constructing fake ancestors with the limited information available in constructing fake ancestors with the limited information available in
patches), directory rename detection is disabled in the apply backend. patches), directory rename detection is disabled in the 'apply' backend.
Disabled directory rename detection means that if one side of history Disabled directory rename detection means that if one side of history
renames a directory and the other adds new files to the old directory, renames a directory and the other adds new files to the old directory,
then the new files will be left behind in the old directory without then the new files will be left behind in the old directory without
any warning at the time of rebasing that you may want to move these any warning at the time of rebasing that you may want to move these
files into the new directory. files into the new directory.
Directory rename detection works with the merge backend to provide you Directory rename detection works with the 'merge' backend to provide you
warnings in such cases. warnings in such cases.
Context Context
~~~~~~~ ~~~~~~~
The apply backend works by creating a sequence of patches (by calling The 'apply' backend works by creating a sequence of patches (by calling
`format-patch` internally), and then applying the patches in sequence `format-patch` internally), and then applying the patches in sequence
(calling `am` internally). Patches are composed of multiple hunks, (calling `am` internally). Patches are composed of multiple hunks,
each with line numbers, a context region, and the actual changes. The each with line numbers, a context region, and the actual changes. The
@ -698,11 +701,11 @@ order to apply the changes to the right lines. However, if multiple
areas of the code have the same surrounding lines of context, the areas of the code have the same surrounding lines of context, the
wrong one can be picked. There are real-world cases where this has wrong one can be picked. There are real-world cases where this has
caused commits to be reapplied incorrectly with no conflicts reported. caused commits to be reapplied incorrectly with no conflicts reported.
Setting diff.context to a larger value may prevent such types of Setting `diff.context` to a larger value may prevent such types of
problems, but increases the chance of spurious conflicts (since it problems, but increases the chance of spurious conflicts (since it
will require more lines of matching context to apply). will require more lines of matching context to apply).
The merge backend works with a full copy of each relevant file, The 'merge' backend works with a full copy of each relevant file,
insulating it from these types of problems. insulating it from these types of problems.
Labelling of conflicts markers Labelling of conflicts markers
@ -710,30 +713,30 @@ Labelling of conflicts markers
When there are content conflicts, the merge machinery tries to When there are content conflicts, the merge machinery tries to
annotate each side's conflict markers with the commits where the annotate each side's conflict markers with the commits where the
content came from. Since the apply backend drops the original content came from. Since the 'apply' backend drops the original
information about the rebased commits and their parents (and instead information about the rebased commits and their parents (and instead
generates new fake commits based off limited information in the generates new fake commits based off limited information in the
generated patches), those commits cannot be identified; instead it has generated patches), those commits cannot be identified; instead it has
to fall back to a commit summary. Also, when merge.conflictStyle is to fall back to a commit summary. Also, when `merge.conflictStyle` is
set to diff3 or zdiff3, the apply backend will use "constructed merge set to `diff3` or `zdiff3`, the 'apply' backend will use "constructed merge
base" to label the content from the merge base, and thus provide no base" to label the content from the merge base, and thus provide no
information about the merge base commit whatsoever. information about the merge base commit whatsoever.
The merge backend works with the full commits on both sides of history The 'merge' backend works with the full commits on both sides of history
and thus has no such limitations. and thus has no such limitations.
Hooks Hooks
~~~~~ ~~~~~
The apply backend has not traditionally called the post-commit hook, The 'apply' backend has not traditionally called the post-commit hook,
while the merge backend has. Both have called the post-checkout hook, while the 'merge' backend has. Both have called the post-checkout hook,
though the merge backend has squelched its output. Further, both though the 'merge' backend has squelched its output. Further, both
backends only call the post-checkout hook with the starting point backends only call the post-checkout hook with the starting point
commit of the rebase, not the intermediate commits nor the final commit of the rebase, not the intermediate commits nor the final
commit. In each case, the calling of these hooks was by accident of commit. In each case, the calling of these hooks was by accident of
implementation rather than by design (both backends were originally implementation rather than by design (both backends were originally
implemented as shell scripts and happened to invoke other commands implemented as shell scripts and happened to invoke other commands
like 'git checkout' or 'git commit' that would call the hooks). Both like `git checkout` or `git commit` that would call the hooks). Both
backends should have the same behavior, though it is not entirely backends should have the same behavior, though it is not entirely
clear which, if any, is correct. We will likely make rebase stop clear which, if any, is correct. We will likely make rebase stop
calling either of these hooks in the future. calling either of these hooks in the future.
@ -741,10 +744,10 @@ calling either of these hooks in the future.
Interruptability Interruptability
~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~
The apply backend has safety problems with an ill-timed interrupt; if The 'apply' backend has safety problems with an ill-timed interrupt; if
the user presses Ctrl-C at the wrong time to try to abort the rebase, the user presses Ctrl-C at the wrong time to try to abort the rebase,
the rebase can enter a state where it cannot be aborted with a the rebase can enter a state where it cannot be aborted with a
subsequent `git rebase --abort`. The merge backend does not appear to subsequent `git rebase --abort`. The 'merge' backend does not appear to
suffer from the same shortcoming. (See suffer from the same shortcoming. (See
https://lore.kernel.org/git/20200207132152.GC2868@szeder.dev/ for https://lore.kernel.org/git/20200207132152.GC2868@szeder.dev/ for
details.) details.)
@ -756,8 +759,8 @@ When a conflict occurs while rebasing, rebase stops and asks the user
to resolve. Since the user may need to make notable changes while to resolve. Since the user may need to make notable changes while
resolving conflicts, after conflicts are resolved and the user has run resolving conflicts, after conflicts are resolved and the user has run
`git rebase --continue`, the rebase should open an editor and ask the `git rebase --continue`, the rebase should open an editor and ask the
user to update the commit message. The merge backend does this, while user to update the commit message. The 'merge' backend does this, while
the apply backend blindly applies the original commit message. the 'apply' backend blindly applies the original commit message.
Miscellaneous differences Miscellaneous differences
~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~
@ -777,23 +780,23 @@ completeness:
them to stderr. them to stderr.
* State directories: The two backends keep their state in different * State directories: The two backends keep their state in different
directories under .git/ directories under `.git/`
include::merge-strategies.txt[] include::merge-strategies.txt[]
NOTES NOTES
----- -----
You should understand the implications of using 'git rebase' on a You should understand the implications of using `git rebase` on a
repository that you share. See also RECOVERING FROM UPSTREAM REBASE repository that you share. See also RECOVERING FROM UPSTREAM REBASE
below. below.
When the git-rebase command is run, it will first execute a "pre-rebase" When the rebase is run, it will first execute a `pre-rebase` hook if one
hook if one exists. You can use this hook to do sanity checks and exists. You can use this hook to do sanity checks and reject the rebase
reject the rebase if it isn't appropriate. Please see the template if it isn't appropriate. Please see the template `pre-rebase` hook script
pre-rebase hook script for an example. for an example.
Upon completion, <branch> will be the current branch. Upon completion, `<branch>` will be the current branch.
INTERACTIVE MODE INTERACTIVE MODE
---------------- ----------------
@ -848,7 +851,7 @@ not look at them but at the commit names ("deadbee" and "fa1afe1" in this
example), so do not delete or edit the names. example), so do not delete or edit the names.
By replacing the command "pick" with the command "edit", you can tell By replacing the command "pick" with the command "edit", you can tell
'git rebase' to stop after applying that commit, so that you can edit `git rebase` to stop after applying that commit, so that you can edit
the files and/or the commit message, amend the commit, and continue the files and/or the commit message, amend the commit, and continue
rebasing. rebasing.
@ -876,14 +879,13 @@ commit, the message from the final one is used. You can also use
"fixup -C" to get the same behavior as "fixup -c" except without opening "fixup -C" to get the same behavior as "fixup -c" except without opening
an editor. an editor.
`git rebase` will stop when "pick" has been replaced with "edit" or
'git rebase' will stop when "pick" has been replaced with "edit" or
when a command fails due to merge errors. When you are done editing when a command fails due to merge errors. When you are done editing
and/or resolving conflicts you can continue with `git rebase --continue`. and/or resolving conflicts you can continue with `git rebase --continue`.
For example, if you want to reorder the last 5 commits, such that what For example, if you want to reorder the last 5 commits, such that what
was HEAD~4 becomes the new HEAD. To achieve that, you would call was `HEAD~4` becomes the new `HEAD`. To achieve that, you would call
'git rebase' like this: `git rebase` like this:
---------------------- ----------------------
$ git rebase -i HEAD~5 $ git rebase -i HEAD~5
@ -903,7 +905,7 @@ like this:
------------------ ------------------
Suppose you want to rebase the side branch starting at "A" to "Q". Make Suppose you want to rebase the side branch starting at "A" to "Q". Make
sure that the current HEAD is "B", and call sure that the current `HEAD` is "B", and call
----------------------------- -----------------------------
$ git rebase -i -r --onto Q O $ git rebase -i -r --onto Q O
@ -956,23 +958,23 @@ SPLITTING COMMITS
----------------- -----------------
In interactive mode, you can mark commits with the action "edit". However, In interactive mode, you can mark commits with the action "edit". However,
this does not necessarily mean that 'git rebase' expects the result of this this does not necessarily mean that `git rebase` expects the result of this
edit to be exactly one commit. Indeed, you can undo the commit, or you can edit to be exactly one commit. Indeed, you can undo the commit, or you can
add other commits. This can be used to split a commit into two: add other commits. This can be used to split a commit into two:
- Start an interactive rebase with `git rebase -i <commit>^`, where - Start an interactive rebase with `git rebase -i <commit>^`, where
<commit> is the commit you want to split. In fact, any commit range `<commit>` is the commit you want to split. In fact, any commit range
will do, as long as it contains that commit. will do, as long as it contains that commit.
- Mark the commit you want to split with the action "edit". - Mark the commit you want to split with the action "edit".
- When it comes to editing that commit, execute `git reset HEAD^`. The - When it comes to editing that commit, execute `git reset HEAD^`. The
effect is that the HEAD is rewound by one, and the index follows suit. effect is that the `HEAD` is rewound by one, and the index follows suit.
However, the working tree stays the same. However, the working tree stays the same.
- Now add the changes to the index that you want to have in the first - Now add the changes to the index that you want to have in the first
commit. You can use `git add` (possibly interactively) or commit. You can use `git add` (possibly interactively) or
'git gui' (or both) to do that. `git gui` (or both) to do that.
- Commit the now-current index with whatever commit message is appropriate - Commit the now-current index with whatever commit message is appropriate
now. now.
@ -983,7 +985,7 @@ add other commits. This can be used to split a commit into two:
If you are not absolutely sure that the intermediate revisions are If you are not absolutely sure that the intermediate revisions are
consistent (they compile, pass the testsuite, etc.) you should use consistent (they compile, pass the testsuite, etc.) you should use
'git stash' to stash away the not-yet-committed changes `git stash` to stash away the not-yet-committed changes
after each commit, test, and amend the commit if fixes are necessary. after each commit, test, and amend the commit if fixes are necessary.
@ -1087,12 +1089,12 @@ NOTE: While an "easy case recovery" sometimes appears to be successful
example, a commit that was removed via `git rebase example, a commit that was removed via `git rebase
--interactive` will be **resurrected**! --interactive` will be **resurrected**!
The idea is to manually tell 'git rebase' "where the old 'subsystem' The idea is to manually tell `git rebase` "where the old 'subsystem'
ended and your 'topic' began", that is, what the old merge base ended and your 'topic' began", that is, what the old merge base
between them was. You will have to find a way to name the last commit between them was. You will have to find a way to name the last commit
of the old 'subsystem', for example: of the old 'subsystem', for example:
* With the 'subsystem' reflog: after 'git fetch', the old tip of * With the 'subsystem' reflog: after `git fetch`, the old tip of
'subsystem' is at `subsystem@{1}`. Subsequent fetches will 'subsystem' is at `subsystem@{1}`. Subsequent fetches will
increase the number. (See linkgit:git-reflog[1].) increase the number. (See linkgit:git-reflog[1].)