NAME

       git-difftool - Show changes using common diff tools

SYNOPSIS

       git difftool [<options>] [<commit> [<commit>]] [--] [<path>...]

DESCRIPTION

       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 git-diff(1).

OPTIONS

       -d, --dir-diff
           Copy the modified files to a temporary location and perform a directory diff on them.
           This mode never prompts before launching the diff tool.

       -y, --no-prompt
           Do not prompt before launching a diff tool.

       --prompt
           Prompt before each invocation of the diff tool. This is the default behaviour; the
           option is provided to override any configuration settings.

       -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 difftool.<tool>.cmd.

           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.

       --tool-help
           Print a list of diff tools that may be used with --tool.

       --[no-]symlinks
           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 tree.

           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 environment.

       -g, --[no-]gui
           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. If diff.guitool is not set, we will
           fallback in the order of merge.guitool, diff.tool, merge.tool until a tool is found.

       --[no-]trust-exit-code
           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.

CONFIG VARIABLES

       git difftool falls back to git mergetool config variables when the difftool equivalents
       have not been defined.

       diff.tool
           The default diff tool to use.

       diff.guitool
           The default diff tool to use when --gui is specified.

       difftool.<tool>.path
           Override the path for the given tool. This is useful in case your tool is not in the
           PATH.

       difftool.<tool>.cmd
           Specify the command to invoke the specified diff tool.

           See the --tool=<tool> option above for more details.

       difftool.prompt
           Prompt before each invocation of the diff tool.

       difftool.trustExitCode
           Exit difftool if the invoked diff tool returns a non-zero exit status.

           See the --trust-exit-code option above for more details.

SEE ALSO

       git-diff(1)
           Show changes between commits, commit and working tree, etc

       git-mergetool(1)
           Run merge conflict resolution tools to resolve merge conflicts

       git-config(1)
           Get and set repository or global options

GIT

       Part of the git(1) suite