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.

       --[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