src/usr.bin/diff/diff.c, branch releng/12.0

diff(1): Implement -B/--ignore-blank-lines

2018-08-19T03:57:20Z

As noted by cem in r338035, coccinelle invokes diff(1) with the -B flag. This was not previously implemented here, so one was forced to create a link for GNU diff to /usr/local/bin/diff Implement the -B flag and add some primitive tests for it. It is implemented in the same fashion that -I is implemented; each chunk's lines are scanned, and if a non-blank line is encountered then the chunk will be output. Otherwise, it's skipped. MFC after: 2 weeks

Add -H as an alias for --speed-large-file to match GNU diff.

2017-06-02T03:25:59Z

This is undocumented to match GNU diff where -H is also undocumented. Some existing software (such as kompare) uses this option by default. Reviewed by: emaste, rpokala Differential Revision: https://reviews.freebsd.org/D11022

Implement a basic --changed-group-format

2017-04-20T14:22:33Z

etcupdate(8) requires that option, while GNU diff supports many more variation of that options, their behaviour beside the simple verion implemented here are quite inconsistent as such I do not plan to implement those. The only special keyword supported by this implementation are: %< and %> %= is not implemented as the documentation of GNU diff says: common lines, but it actually when tested print the changes from the first file

Clean up headers declaration

2017-04-15T13:57:35Z

add a stub --speed-large-files for compatibility with GNU diff

2017-04-08T08:46:02Z

There is no intention to implement it, but lots of scripts/tools using diff(1) passes GNU diff option

Use strndup(3) instead of malloc + memcpy

2017-03-22T21:52:22Z

Implement a stub --horizon-lines=NUM for compatibility with GNU diff3

2017-03-12T03:49:05Z

some options of GNU diff3 would call diff with --horizon-lines, rcs is depending on that. Reported by: antoine

Import diff from OpenBSD and remove GNU diff

2017-03-11T05:01:29Z

Some of the modifications from the previous summer of code has been integrated Modification for compatibility with GNU diff output has been added Main difference with OpenBSD: Implement multiple GNU diff options: * --ignore-file-name-case * --no-ignore-file-name-case * --normal * --tabsize * --strip-trailing-cr Make diff -p compatible with GNU diff Implement diff -l Make diff -r compatible with GNU diff Capsicumize diffing 2 regular files Add a simple test suite Approved by: AsiaBSDcon devsummit Obtained from: OpenBSD, GSoC Relnotes: yes