6 git-difftool - Show changes using common diff tools
11 'git difftool' [<options>] [<commit> [<commit>]] [--] [<path>...]
15 'git difftool' is a Git command that allows you to compare and edit files
16 between revisions using common diff tools. 'git difftool' is a frontend
17 to 'git diff' and accepts the same options and arguments. See
24 Copy the modified files to a temporary location and perform
25 a directory diff on them. This mode never prompts before
26 launching the diff tool.
30 Do not prompt before launching a diff tool.
33 Prompt before each invocation of the diff tool.
34 This is the default behaviour; the option is provided to
35 override any configuration settings.
38 Start showing the diff for the given path,
39 the paths before it will move to the end and output.
42 Start showing the diff for the given path, skipping all
47 Use the diff tool specified by <tool>. Valid values include
48 emerge, kompare, meld, and vimdiff. Run `git difftool --tool-help`
49 for the list of valid <tool> settings.
51 If a diff tool is not specified, 'git difftool'
52 will use the configuration variable `diff.tool`. If the
53 configuration variable `diff.tool` is not set, 'git difftool'
54 will pick a suitable default.
56 You can explicitly provide a full path to the tool by setting the
57 configuration variable `difftool.<tool>.path`. For example, you
58 can configure the absolute path to kdiff3 by setting
59 `difftool.kdiff3.path`. Otherwise, 'git difftool' assumes the
60 tool is available in PATH.
62 Instead of running one of the known diff tools,
63 'git difftool' can be customized to run an alternative program
64 by specifying the command line to invoke in a configuration
65 variable `difftool.<tool>.cmd`.
67 When 'git difftool' is invoked with this tool (either through the
68 `-t` or `--tool` option or the `diff.tool` configuration variable)
69 the configured command line will be invoked with the following
70 variables available: `$LOCAL` is set to the name of the temporary
71 file containing the contents of the diff pre-image and `$REMOTE`
72 is set to the name of the temporary file containing the contents
73 of the diff post-image. `$MERGED` is the name of the file which is
74 being compared. `$BASE` is provided for compatibility
75 with custom merge tool commands and has the same value as `$MERGED`.
78 Print a list of diff tools that may be used with `--tool`.
81 'git difftool''s default behavior is to create symlinks to the
82 working tree when run in `--dir-diff` mode and the right-hand
83 side of the comparison yields the same content as the file in
86 Specifying `--no-symlinks` instructs 'git difftool' to create copies
87 instead. `--no-symlinks` is the default on Windows.
91 Specify a custom command for viewing diffs.
92 'git-difftool' ignores the configured defaults and runs
93 `<command> $LOCAL $REMOTE` when this option is specified.
94 Additionally, `$BASE` is set in the environment.
98 When 'git-difftool' is invoked with the `-g` or `--gui` option
99 the default diff tool will be read from the configured
100 `diff.guitool` variable instead of `diff.tool`. This may be
101 selected automatically using the configuration variable
102 `difftool.guiDefault`. The `--no-gui` option can be used to
103 override these settings. If `diff.guitool` is not set, we will
104 fallback in the order of `merge.guitool`, `diff.tool`,
105 `merge.tool` until a tool is found.
107 --[no-]trust-exit-code::
108 Errors reported by the diff tool are ignored by default.
109 Use `--trust-exit-code` to make 'git-difftool' exit when an
110 invoked diff tool returns a non-zero exit code.
112 'git-difftool' will forward the exit code of the invoked tool when
113 `--trust-exit-code` is used.
115 See linkgit:git-diff[1] for the full list of supported options.
119 'git difftool' falls back to 'git mergetool' config variables when the
120 difftool equivalents have not been defined.
122 include::includes/cmd-config-section-rest.txt[]
124 include::config/difftool.txt[]
128 linkgit:git-diff[1]::
129 Show changes between commits, commit and working tree, etc
131 linkgit:git-mergetool[1]::
132 Run merge conflict resolution tools to resolve merge conflicts
134 linkgit:git-config[1]::
135 Get and set repository or global options
139 Part of the linkgit:git[1] suite