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<body class="manpage">
<div id="header">
<h1>
git-difftool(1) Manual Page
</h1>
<h2>NAME</h2>
<div class="sectionbody">
<p>git-difftool -
Show changes using common diff tools
</p>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="_synopsis">SYNOPSIS</h2>
<div class="sectionbody">
<div class="verseblock">
<pre class="content"><em>git difftool</em> [<options>] [<commit> [<commit>]] [--] [<path>…]</pre>
<div class="attribution">
</div></div>
</div>
</div>
<div class="sect1">
<h2 id="_description">DESCRIPTION</h2>
<div class="sectionbody">
<div class="paragraph"><p><em>git difftool</em> is a Git command that allows you to compare and edit files
between revisions using common diff tools. <em>git difftool</em> is a frontend
to <em>git diff</em> and accepts the same options and arguments. See
<a href="git-diff.html">git-diff(1)</a>.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_options">OPTIONS</h2>
<div class="sectionbody">
<div class="dlist"><dl>
<dt class="hdlist1">
-d
</dt>
<dt class="hdlist1">
--dir-diff
</dt>
<dd>
<p>
Copy the modified files to a temporary location and perform
a directory diff on them. This mode never prompts before
launching the diff tool.
</p>
</dd>
<dt class="hdlist1">
-y
</dt>
<dt class="hdlist1">
--no-prompt
</dt>
<dd>
<p>
Do not prompt before launching a diff tool.
</p>
</dd>
<dt class="hdlist1">
--prompt
</dt>
<dd>
<p>
Prompt before each invocation of the diff tool.
This is the default behaviour; the option is provided to
override any configuration settings.
</p>
</dd>
<dt class="hdlist1">
-t <tool>
</dt>
<dt class="hdlist1">
--tool=<tool>
</dt>
<dd>
<p>
Use the diff tool specified by <tool>. Valid values include
emerge, kompare, meld, and vimdiff. Run <code>git difftool --tool-help</code>
for the list of valid <tool> settings.
</p>
<div class="paragraph"><p>If a diff tool is not specified, <em>git difftool</em>
will use the configuration variable <code>diff.tool</code>. If the
configuration variable <code>diff.tool</code> is not set, <em>git difftool</em>
will pick a suitable default.</p></div>
<div class="paragraph"><p>You can explicitly provide a full path to the tool by setting the
configuration variable <code>difftool.<tool>.path</code>. For example, you
can configure the absolute path to kdiff3 by setting
<code>difftool.kdiff3.path</code>. Otherwise, <em>git difftool</em> assumes the
tool is available in PATH.</p></div>
<div class="paragraph"><p>Instead of running one of the known diff tools,
<em>git difftool</em> can be customized to run an alternative program
by specifying the command line to invoke in a configuration
variable <code>difftool.<tool>.cmd</code>.</p></div>
<div class="paragraph"><p>When <em>git difftool</em> is invoked with this tool (either through the
<code>-t</code> or <code>--tool</code> option or the <code>diff.tool</code> configuration variable)
the configured command line will be invoked with the following
variables available: <code>$LOCAL</code> is set to the name of the temporary
file containing the contents of the diff pre-image and <code>$REMOTE</code>
is set to the name of the temporary file containing the contents
of the diff post-image. <code>$MERGED</code> is the name of the file which is
being compared. <code>$BASE</code> is provided for compatibility
with custom merge tool commands and has the same value as <code>$MERGED</code>.</p></div>
</dd>
<dt class="hdlist1">
--tool-help
</dt>
<dd>
<p>
Print a list of diff tools that may be used with <code>--tool</code>.
</p>
</dd>
<dt class="hdlist1">
--[no-]symlinks
</dt>
<dd>
<p>
<em>git difftool</em>'s default behavior is create symlinks to the
working tree when run in <code>--dir-diff</code> mode and the right-hand
side of the comparison yields the same content as the file in
the working tree.
</p>
<div class="paragraph"><p>Specifying <code>--no-symlinks</code> instructs <em>git difftool</em> to create copies
instead. <code>--no-symlinks</code> is the default on Windows.</p></div>
</dd>
<dt class="hdlist1">
-x <command>
</dt>
<dt class="hdlist1">
--extcmd=<command>
</dt>
<dd>
<p>
Specify a custom command for viewing diffs.
<em>git-difftool</em> ignores the configured defaults and runs
<code>$command $LOCAL $REMOTE</code> when this option is specified.
Additionally, <code>$BASE</code> is set in the environment.
</p>
</dd>
<dt class="hdlist1">
-g
</dt>
<dt class="hdlist1">
--gui
</dt>
<dd>
<p>
When <em>git-difftool</em> is invoked with the <code>-g</code> or <code>--gui</code> option
the default diff tool will be read from the configured
<code>diff.guitool</code> variable instead of <code>diff.tool</code>.
</p>
</dd>
</dl></div>
<div class="paragraph"><p>See <a href="git-diff.html">git-diff(1)</a> for the full list of supported options.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_config_variables">CONFIG VARIABLES</h2>
<div class="sectionbody">
<div class="paragraph"><p><em>git difftool</em> falls back to <em>git mergetool</em> config variables when the
difftool equivalents have not been defined.</p></div>
<div class="dlist"><dl>
<dt class="hdlist1">
diff.tool
</dt>
<dd>
<p>
The default diff tool to use.
</p>
</dd>
<dt class="hdlist1">
diff.guitool
</dt>
<dd>
<p>
The default diff tool to use when <code>--gui</code> is specified.
</p>
</dd>
<dt class="hdlist1">
difftool.<tool>.path
</dt>
<dd>
<p>
Override the path for the given tool. This is useful in case
your tool is not in the PATH.
</p>
</dd>
<dt class="hdlist1">
difftool.<tool>.cmd
</dt>
<dd>
<p>
Specify the command to invoke the specified diff tool.
</p>
<div class="paragraph"><p>See the <code>--tool=<tool></code> option above for more details.</p></div>
</dd>
<dt class="hdlist1">
difftool.prompt
</dt>
<dd>
<p>
Prompt before each invocation of the diff tool.
</p>
</dd>
</dl></div>
</div>
</div>
<div class="sect1">
<h2 id="_see_also">SEE ALSO</h2>
<div class="sectionbody">
<div class="dlist"><dl>
<dt class="hdlist1">
<a href="git-diff.html">git-diff(1)</a>
</dt>
<dd>
<p>
Show changes between commits, commit and working tree, etc
</p>
</dd>
<dt class="hdlist1">
<a href="git-mergetool.html">git-mergetool(1)</a>
</dt>
<dd>
<p>
Run merge conflict resolution tools to resolve merge conflicts
</p>
</dd>
<dt class="hdlist1">
<a href="git-config.html">git-config(1)</a>
</dt>
<dd>
<p>
Get and set repository or global options
</p>
</dd>
</dl></div>
</div>
</div>
<div class="sect1">
<h2 id="_git">GIT</h2>
<div class="sectionbody">
<div class="paragraph"><p>Part of the <a href="git.html">git(1)</a> suite</p></div>
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Last updated 2013-06-10 20:01:55 UTC
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