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.
39 Use the diff tool specified by <tool>. Valid values include
40 emerge, kompare, meld, and vimdiff. Run `git difftool --tool-help`
41 for the list of valid <tool> settings.
43 If a diff tool is not specified, 'git difftool'
44 will use the configuration variable `diff.tool`. If the
45 configuration variable `diff.tool` is not set, 'git difftool'
46 will pick a suitable default.
48 You can explicitly provide a full path to the tool by setting the
49 configuration variable `difftool.<tool>.path`. For example, you
50 can configure the absolute path to kdiff3 by setting
51 `difftool.kdiff3.path`. Otherwise, 'git difftool' assumes the
52 tool is available in PATH.
54 Instead of running one of the known diff tools,
55 'git difftool' can be customized to run an alternative program
56 by specifying the command line to invoke in a configuration
57 variable `difftool.<tool>.cmd`.
59 When 'git difftool' is invoked with this tool (either through the
60 `-t` or `--tool` option or the `diff.tool` configuration variable)
61 the configured command line will be invoked with the following
62 variables available: `$LOCAL` is set to the name of the temporary
63 file containing the contents of the diff pre-image and `$REMOTE`
64 is set to the name of the temporary file containing the contents
65 of the diff post-image. `$MERGED` is the name of the file which is
66 being compared. `$BASE` is provided for compatibility
67 with custom merge tool commands and has the same value as `$MERGED`.
70 Print a list of diff tools that may be used with `--tool`.
73 'git difftool''s default behavior is create symlinks to the
74 working tree when run in `--dir-diff` mode and the right-hand
75 side of the comparison yields the same content as the file in
78 Specifying `--no-symlinks` instructs 'git difftool' to create copies
79 instead. `--no-symlinks` is the default on Windows.
83 Specify a custom command for viewing diffs.
84 'git-difftool' ignores the configured defaults and runs
85 `$command $LOCAL $REMOTE` when this option is specified.
86 Additionally, `$BASE` is set in the environment.
90 When 'git-difftool' is invoked with the `-g` or `--gui` option
91 the default diff tool will be read from the configured
92 `diff.guitool` variable instead of `diff.tool`. The `--no-gui`
93 option can be used to override this setting. If `diff.guitool`
94 is not set, we will fallback in the order of `merge.guitool`,
95 `diff.tool`, `merge.tool` until a tool is found.
97 --[no-]trust-exit-code::
98 'git-difftool' invokes a diff tool individually on each file.
99 Errors reported by the diff tool are ignored by default.
100 Use `--trust-exit-code` to make 'git-difftool' exit when an
101 invoked diff tool returns a non-zero exit code.
103 'git-difftool' will forward the exit code of the invoked tool when
104 `--trust-exit-code` is used.
106 See linkgit:git-diff[1] for the full list of supported options.
110 'git difftool' falls back to 'git mergetool' config variables when the
111 difftool equivalents have not been defined.
114 The default diff tool to use.
117 The default diff tool to use when `--gui` is specified.
119 difftool.<tool>.path::
120 Override the path for the given tool. This is useful in case
121 your tool is not in the PATH.
123 difftool.<tool>.cmd::
124 Specify the command to invoke the specified diff tool.
126 See the `--tool=<tool>` option above for more details.
129 Prompt before each invocation of the diff tool.
131 difftool.trustExitCode::
132 Exit difftool if the invoked diff tool returns a non-zero exit status.
134 See the `--trust-exit-code` option above for more details.
138 linkgit:git-diff[1]::
139 Show changes between commits, commit and working tree, etc
141 linkgit:git-mergetool[1]::
142 Run merge conflict resolution tools to resolve merge conflicts
144 linkgit:git-config[1]::
145 Get and set repository or global options
149 Part of the linkgit:git[1] suite