% DIFFT(1)
difft - a structural diff tool that understands syntax
difft [OPTIONS] OLD-PATH NEW-PATH
difft [OPTIONS] DIRECTORY-ONE DIRECTORY-TWO
difft [OPTIONS] FILE-WITH-CONFLICTS
difft --list-languages
difft --help
difftastic (difft) is a CLI diff tool that compares files based on their syntax, not line-by-line. Difftastic produces accurate diffs that are easier for humans to read.
--background BACKGROUND
: Set the background brightness. Difftastic will prefer brighter colours on dark backgrounds.
--byte-limit LIMIT
: Use a text diff if either input file exceeds this size.
--check-only
: Report whether there are any changes, but don't calculate them. Much faster.
--color WHEN
: When to use color output.
--context LINES
: The number of contextual lines to show around changed lines.
--display MODE
: Display mode for showing results.
_side-by-side_: Display the before file and the after file in two separate columns, with
line numbers aligned according to unchanged content. If a change is exclusively
additions or exclusively removals, use a single column.
_side-by-side-show-both_: The same as _side-by-side_, but always uses two columns.
_inline_: A single column display, closer to traditional diff display.
_json_: Output the results as a machine-readable JSON array with an element per file.--exit-code
: Set the exit code to 1 if there are syntactic changes in any files. For files where there is no detected language (e.g. unsupported language or binary files), sets the exit code if there are any byte changes.
--graph-limit LIMIT
: Use a text diff if the structural graph exceed this number of nodes in memory.
-h, --help
: Print help information.
--ignore-comments
: Don't consider comments when diffing.
--list-languages
: Print the all the languages supported by difftastic, along with their extensions.
--missing-as-empty
: Treat paths that don't exist as equivalent to an empty file. Only applies when diffing files, not directories.
--override GLOB:NAME
: Associate this glob pattern with this language, overriding normal language detection. For example:
$ difft \-\-override='*.c:C++' old.c new.c
See **\-\-list-languages** for the list of language names. Language names are matched case
insensitively. Overrides may also specify the language _"text"_ to treat a file as plain
text.
This argument may be given more than once. For example:
$ difft \-\-override='CustomFile:json' \-\-override='*.c:text' old.c new.c
To configure multiple overrides using environment variables, difftastic also accepts
**DFT_OVERRIDE_1** up to **DFT_OVERRIDE_9**.
$ export DFT_OVERRIDE='CustomFile:json'
$ export DFT_OVERRIDE_1='*.c:text'
$ export DFT_OVERRIDE_2='*.js:javascript jsx'
When multiple overrides are specified, the first matching override wins.--parse-error-limit LIMIT
: Use a text diff if the number of parse errors exceeds this value.
--skip-unchanged
: Don't display anything if a file is unchanged.
--sort-paths
: When diffing a directory, output the results sorted by path. This is slower.
--strip-cr
: Remove any carriage return characters before diffing. This can be helpful when dealing with files on Windows that contain CRLF, i.e. \r\n.
--syntax-highlight on/off
: Enable or disable syntax highlighting.
--tab-width NUMSPACES
: Treat a tab as this many spaces.
-V, --version
: Print version information.
--width COLUMNS
: Use this many columns when calculating line wrapping. If not specified, difftastic will detect the terminal width.
--dump-syntax PATH
: Parse a single file with tree-sitter and display the difftastic syntax tree.
--dump-ts PATH
: Parse a single file with tree-sitter and display the tree-sitter parse tree.
A full HTML manual is available at https://difftastic.wilfred.me.uk/introduction.
See GitHub issues at https://github.com/Wilfred/difftastic/issues.
Wilfred Hughes me@wilfred.me.uk