GIT-UPSTREAM-DIFF(1)

NAME
git-upstream-diff - Print a diff of the current branch, compared to its upstream.

SYNOPSIS

git upstream-diff [--wordwise] [--branch branch] [<extra args for git-diff>*]

DESCRIPTION

Shows a diff between a branch and its upstream. If the --branch option is omitted or "HEAD", the tool shows the diff for the current branch. Any additional arguments are passed through to the underlying git-diff command. This is roughly the same as:

    git diff --patience -C -C branch@{upstream}  (1) (2)

1. -C -C detects file copies/renames
2. --patience uses the patience-diff algorithm, which tends to produce nicer diffs in many cases.

The difference is that branch@{upstream} is actually the tagged merge base of your branch (See git-rebase-update(1)). This means that if your upstream branch was rebased, but you haven’t yet rebased the current branch on top of it, you’ll still see an accurate diff compared to just diffing against @{upstream}.

The --wordwise option also allows git-diff to do word-by-word comparison in a semi-intelligent way. However, sometimes it can produce surprising results, so it is disabled by default.

Since any additional options are passed through to git-diff unchanged, you can use this as a general replacement for git diff for things like:

    $ # See what changed in a file on the current branch
    $ git upstream-diff some/file.py
    ...
    $ # Omit deleted files from the diff
    $ git upstream-diff --diff-filter d
    ...
    $ # etc.

OPTIONS

--wordwise
    Print a colorized word-wise diff instead of a line-wise diff.

        Show a diff between the specified branch and its upstream, instead of using
        the current branch.

<extra args for git-diff>
    Extra arguments are included in the invocation of git-diff(1). These can be anything that git-diff normally takes.

    --stat
        This is particularly useful to show which files have been changed in comparison to the upstream branch.

    --staged
        Diff against the staged (cached) changes, instead of against the working directory. This is substantially faster on large repos, but doesn’t take into account unstaged changes (i.e. changes in your working copy which you haven’t staged with git add).

    -- <filename patterns>*
        Restrict the diff to only show the diff for given files compared to the upstream.

CONFIGURATION VARIABLES

  depot-tools.upstream-diff.default-args

A list-configuration variable. Each instance of this config variable will be prepended to all invocations of git upstream-diff, as if you had passed them on the command line.

SUGGESTED ALIASES

Some common short-hand aliases. Feel free to add these to your ~/.gitconfig file.

    [alias]
      git udiff = upstream-diff

SEE ALSO

git-rebase-update(1)

CHROMIUM DEPOT_TOOLS

Part of the chromium depot_tools(7) suite. These tools are meant to assist with the development of chromium and related projects. Download the tools from here[1].

NOTES

1.  here
    https://chromium.googlesource.com/chromium/tools/depot_tools.git