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.\"     Title: git-rebase-update
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: 08/10/2020
.\"    Manual: Chromium depot_tools Manual
.\"    Source: depot_tools 8c3f7227
.\"  Language: English
.\"
.TH "GIT\-REBASE\-UPDATE" "1" "08/10/2020" "depot_tools 8c3f7227" "Chromium depot_tools Manual"
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.SH "NAME"
git-rebase-update \- Updates all branches to have the latest changes from their upstreams\&.
.SH "SYNOPSIS"
.sp
.nf
\fIgit rebase\-update\fR [\-v | \-\-verbose] [\-n | \-\-no\-fetch] [\-k | \-\-keep\-going]
.fi
.sp
.SH "DESCRIPTION"
.sp
Brings all branches up\-to\-date with their tracking branches\&. This involves several phases:
.PP
Preparation
.RS 4
If you currently have a branch checked out, any changes on that branch are
\fIfrozen\fR
(See
\fBgit-freeze\fR(1)
for more detail)\&. Additionally, the current branch is recorded for the
\fIRestoration\fR
phase later (see
\fICONFIGURATION VARIABLES\fR
for details on
depot\-tools\&.rebase\-update\&.starting\-branch)\&.
.RE
.PP
Fetching
.RS 4
All branches are examined to find their upstream references\&. The correct set of git remotes is determined, and fetched accordingly\&. Note that if any branches have a tag as their upstream, we are forced to pull all remotes\&.
.sp
Pass
\-\-no\-fetch
to skip this phase\&.
.RE
.PP
Rebasing
.RS 4
All branches are rebased in topological order from roots (upstreams) to leaves\&. Each branch is rebased from its marked merge\-base (see
\fICONFIGURATION VARIABLES\fR) to the branch tip on top of its parent branch\&. If the parent branch is
\fIfrozen\fR
(see
\fBgit-freeze\fR(1)), the branch will be rebased onto the last non\-freeze commit on the parent branch\&.
.sp
Things get interesting when there are merge conflicts on rebase\&. The
\fBmost common\fR
cause for conflicts is when your branch has been committed to the upstream in squashed form, ala
\fBgit-squash-branch\fR(1), which is what
\fBgit-cl\fR(1)
and the
\fICommit Queue\fR
will do\&. Because of that,
git rebase\-update
will attempt to squash your conflicted branch to see if the squashed version applies cleanly to its upstream\&.
.sp
If it does not apply cleanly, then your original (non\-squashed) branch will be left in mid\-rebase and
git rebase\-update
will exit\&. You can deal with this like any other conflicted rebase\&. When you\(cqre done, just
git rebase\-update
again to pick up where you left off\&.
.RE
.sp
If you\(cqd like to rebase all rebaseable branches in one pass and manually process the unrebaseable ones later, use \-k or \-\-keep\-going\&. Cleanup will not happen until all branches apply cleanly\&.
.PP
Cleanup
.RS 4
Once all the branches have been rebased, any empty branches (i\&.e\&. branches with no commits on them) are removed\&. If a branch is removed in this fashion, any branches which depend on it are reparented to the parent of the removed branch (see
\fBgit-reparent-branch\fR(1))\&.
.RE
.PP
Restoration
.RS 4
git rebase\-update
checks out the branch that you started on, and
\fIthaws\fR
it, if necessary (see
\fBgit-thaw\fR(1))\&. If the branch you started on got cleaned up,
git rebase\-update
will checkout the
\fIroot\fR
ref (defaults to
\fIorigin\fR\*(Aqs default branch, as configured by
depot\-tools\&.upstream, see
\fBgit-new-branch\fR(1))\&.
.RE
.SH "OPTIONS"
.PP
\-k, \-\-keep\-going
.RS 4
Keep processing past failed rebases\&.
.RE
.PP
\-n, \-\-no\-fetch
.RS 4
Skip the
git fetch
phase of rebase\-update\&.
.RE
.PP
\-v, \-\-verbose
.RS 4
More text than your terminal can handle\&.
.RE
.PP
\-\-current
.RS 4
Only rebase the current branch\&.
.RE
.SH "CONFIGURATION VARIABLES"
.SS "depot\-tools\&.rebase\-update\&.starting\-branch"
.sp
When git rebase\-update first runs, it will record the current branch here so that when it completes successfully, it will return back to the same branch you started on, even if git rebase\-update is interrupted due to rebase conflicts\&. When git rebase\-update completes successfully, this configuration variable is removed\&.
.SS "branch\&.<name>\&.dormant"
.sp
If true, will cause rebase\-update to skip all processing on the branch\&. Useful for old/high\-conflict branches which you want to keep for posterity, but don\(cqt want to deal with when running git rebase\-update
.SS "branch\&.<name>\&.base"
.sp
Holds the \fIbase\fR reference for this branch\&. By default this is equivalent to git merge\-base <name> <name>@{upstream}\&. However, it can diverge if <name>@{upstream} is manually rebased\&. In this case, it correctly preserves the value it had before, where git merge\-base would now report the wrong value\&.
.sp
All of the tools in the \fBdepot_tools\fR(1) suite collude to keep this value as up\-to\-date as possible, including \fBgit-reparent-branch\fR(1), and \fBgit-new-branch\fR(1)\&. \fBgit-map\fR(1) also shows the location of these marker values in \fBwhite\fR\&.
.sp
\fBgit-mark-merge-base\fR(1) allows easy manual interaction for this value, in the unlikely event that it gets out of sync\&.
.SH "SUGGESTED ALIASES"
.sp
Some common short\-hand aliases\&. Feel free to add these to your \fI~/\&.gitconfig\fR file\&.
.sp
.if n \{\
.RS 4
.\}
.nf
[alias]
  git reup = rebase\-update
.fi
.if n \{\
.RE
.\}
.sp
.SH "SEE ALSO"
.sp
\fBgit-new-branch\fR(1), \fBgit-reparent-branch\fR(1), \fBgit-rename-branch\fR(1), \fBgit-upstream-diff\fR(1), \fBgit-freeze\fR(1), \fBgit-mark-merge-base\fR(1)
.SH "CHROMIUM DEPOT_TOOLS"
.sp
Part of the chromium \fBdepot_tools\fR(7) suite\&. These tools are meant to assist with the development of chromium and related projects\&. Download the tools by checking out the \m[blue]\fBgit repository\fR\m[]\&\s-2\u[1]\d\s+2\&.
.SH "NOTES"
.IP " 1." 4
git repository
.RS 4
\%https://chromium.googlesource.com/chromium/tools/depot_tools.git
.RE