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2021-04-08userdiff: add support for SchemeLibravatar Atharva Raykar3-0/+23
Add a diff driver for Scheme-like languages which recognizes top level and local `define` forms, whether it is a function definition, binding, syntax definition or a user-defined `define-xyzzy` form. Also supports R6RS `library` forms, `module` forms along with class and struct declarations used in Racket (PLT Scheme). Alternate "def" syntax such as those in Gerbil Scheme are also supported, like defstruct, defsyntax and so on. The rationale for picking `define` forms for the hunk headers is because it is usually the only significant form for defining the structure of the program, and it is a common pattern for schemers to have local function definitions to hide their visibility, so it is not only the top level `define`'s that are of interest. Schemers also extend the language with macros to provide their own define forms (for example, something like a `define-test-suite`) which is also captured in the hunk header. Since it is common practice to extend syntax with variants of a form like `module+`, `class*` etc, those have been supported as well. The word regex is a best-effort attempt to conform to R7RS[1] valid identifiers, symbols and numbers. [1] https://small.r7rs.org/attachment/r7rs.pdf (section 2.1) Signed-off-by: Atharva Raykar <raykar.ath@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-08-21userdiff: add a builtin pattern for dts filesLibravatar Stephen Boyd3-0/+101
The Linux kernel receives many patches to the devicetree files each release. The hunk header for those patches typically show nothing, making it difficult to figure out what node is being modified without applying the patch or opening the file and seeking to the context. Let's add a builtin 'dts' pattern to git so that users can get better diff output on dts files when they use the diff=dts driver. The regex has been constructed based on the spec at devicetree.org[1] and with some help from Johannes Sixt. [1] https://github.com/devicetree-org/devicetree-specification/releases/latest Cc: Rob Herring <robh+dt@kernel.org> Cc: Frank Rowand <frowand.list@gmail.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-06-03userdiff: add built-in pattern for CSSLibravatar William Duclot3-0/+36
CSS is widely used, motivating it being included as a built-in pattern. It must be noted that the word_regex for CSS (i.e. the regex defining what is a word in the language) does not consider '.' and '#' characters (in CSS selectors) to be part of the word. This behavior is documented by the test t/t4018/css-rule. The logic behind this behavior is the following: identifiers in CSS selectors are identifiers in a HTML/XML document. Therefore, the '.'/'#' character are not part of the identifier, but an indicator of the nature of the identifier in HTML/XML (class or id). Diffing ".class1" and ".class2" must show that the class name is changed, but we still are selecting a class. Logic behind the "pattern" regex is: 1. reject lines ending with a colon/semicolon (properties) 2. if a line begins with a name in column 1, pick the whole line Credits to Johannes Sixt (j6t@kdbg.org) for the pattern regex and most of the tests. Signed-off-by: William Duclot <william.duclot@ensimag.grenoble-inp.fr> Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr> Reviewed-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-02-05userdiff: update Ada patternsLibravatar Adrian Johnson1-1/+1
- Allow extra space in "is new" and "is separate" - Fix bug in word regex for numbers Signed-off-by: Adrian Johnson <ajohnson@redneon.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-16Add userdiff patterns for AdaLibravatar Adrian Johnson3-0/+53
Add Ada xfuncname and wordRegex patterns to the list of builtin patterns. Signed-off-by: Adrian Johnson <ajohnson@redneon.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-11-15Add built-in diff patterns for MATLAB codeLibravatar Gustaf Hendeby3-0/+32
MATLAB is often used in industry and academia for scientific computations motivating it being included as a built-in pattern. Signed-off-by: Gustaf Hendeby <hendeby@isy.liu.se> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-01-18t4034 (diff --word-diff): add a minimum Perl drier test vectorLibravatar Junio C Hamano3-0/+57
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-01-18t4034: bulk verify builtin word regex sanityLibravatar Thomas Rast36-0/+653
The builtin word regexes should be tested with some simple examples against simple issues. Do this in bulk. Mainly due to a lack of language knowledge and inspiration, most of the test cases (cpp, csharp, java, objc, pascal, php, python, ruby) are directly based off a C operator precedence table to verify that all operators are split correctly. This means that they are probably incomplete or inaccurate except for 'cpp' itself. Still, they are good enough to already have uncovered a typo in the python and ruby patterns. 'fortran' is based on my anecdotal knowledge of the DO10I parsing rules, and thus probably useless. The rest (bibtex, html, tex) are an ad-hoc test of what I consider important splits in those languages. Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>