git difftool is a Git command that allows you to compare and edit
files between revisions using common diff tools. git difftool is a
frontend to git diff and accepts the same options and arguments. See
Copy the modified files to a temporary location and perform a
directory diff on them. This mode never prompts before launching
the diff tool.
Do not prompt before launching a diff tool.
Prompt before each invocation of the diff tool. This is the
default behaviour; the option is provided to override any
-t <tool>, --tool=<tool>
Use the diff tool specified by <tool>. Valid values include
emerge, kompare, meld, and vimdiff. Run git difftool --tool-help
for the list of valid <tool> settings.
If a diff tool is not specified, git difftool will use the
configuration variable diff.tool. If the configuration variable
diff.tool is not set, git difftool will pick a suitable default.
You can explicitly provide a full path to the tool by setting the
configuration variable difftool.<tool>.path. For example, you can
configure the absolute path to kdiff3 by setting
difftool.kdiff3.path. Otherwise, git difftool assumes the tool is
available in PATH.
Instead of running one of the known diff tools, git difftool can
be customized to run an alternative program by specifying the
command line to invoke in a configuration variable
When git difftool is invoked with this tool (either through the
-t or --tool option or the diff.tool configuration variable) the
configured command line will be invoked with the following
variables available: $LOCAL is set to the name of the temporary
file containing the contents of the diff pre-image and $REMOTE is
set to the name of the temporary file containing the contents of
the diff post-image. $MERGED is the name of the file which is
being compared. $BASE is provided for compatibility with custom
merge tool commands and has the same value as $MERGED.
Print a list of diff tools that may be used with --tool.
git difftool's default behavior is create symlinks to the working
tree when run in --dir-diff mode and the right-hand side of the
comparison yields the same content as the file in the working
Specifying --no-symlinks instructs git difftool to create copies
instead. --no-symlinks is the default on Windows.
-x <command>, --extcmd=<command>
Specify a custom command for viewing diffs. git-difftool ignores
the configured defaults and runs $command $LOCAL $REMOTE when
this option is specified. Additionally, $BASE is set in the
When git-difftool is invoked with the -g or --gui option the
default diff tool will be read from the configured diff.guitool
variable instead of diff.tool. The --no-gui option can be used to
override this setting.
git-difftool invokes a diff tool individually on each file.
Errors reported by the diff tool are ignored by default. Use
--trust-exit-code to make git-difftool exit when an invoked diff
tool returns a non-zero exit code.
git-difftool will forward the exit code of the invoked tool when
--trust-exit-code is used.
See git-diff(1) for the full list of supported options.
git difftool falls back to git mergetool config variables when the
difftool equivalents have not been defined.
The default diff tool to use.
The default diff tool to use when --gui is specified.
Override the path for the given tool. This is useful in case your
tool is not in the PATH.
Specify the command to invoke the specified diff tool.
See the --tool=<tool> option above for more details.
Prompt before each invocation of the diff tool.
Exit difftool if the invoked diff tool returns a non-zero exit
See the --trust-exit-code option above for more details.
Show changes between commits, commit and working tree, etc
Run merge conflict resolution tools to resolve merge conflicts
Get and set repository or global options
This page is part of the git (Git distributed version control system)
project. Information about the project can be found at
⟨http://git-scm.com/⟩. If you have a bug report for this manual page,
see ⟨http://git-scm.com/community⟩. This page was obtained from the
project's upstream Git repository ⟨https://github.com/git/git.git⟩ on
2017-03-13. If you discover any rendering problems in this HTML ver‐
sion of the page, or you believe there is a better or more up-to-date
source for the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original man‐
ual page), send a mail to email@example.com
Git 2.12.0.rc2 02/18/2017 GIT-DIFFTOOL(1)