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2009-01-21Change the spelling of "wordregex".Libravatar Boyd Stephen Smith Jr1-4/+4
Use "wordRegex" for configuration variable names. Use "word_regex" for C language tokens. Signed-off-by: Boyd Stephen Smith Jr. <bss@iguanasuicide.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-21color-words: Support diff.wordregex config optionLibravatar Boyd Stephen Smith Jr1-2/+43
When diff is invoked with --color-words (w/o =regex), use the regular expression the user has configured as diff.wordregex. diff drivers configured via attributes take precedence over the diff.wordregex-words setting. If the user wants to change them, they have their own configuration variables. Signed-off-by: Boyd Stephen Smith Jr <bss@iguanasuicide.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-17color-words: make regex configurable via attributesLibravatar Thomas Rast1-0/+36
Make the --color-words splitting regular expression configurable via the diff driver's 'wordregex' attribute. The user can then set the driver on a file in .gitattributes. If a regex is given on the command line, it overrides the driver's setting. We also provide built-in regexes for the languages that already had funcname patterns, and add an appropriate diff driver entry for C/++. (The patterns are designed to run UTF-8 sequences into a single chunk to make sure they remain readable.) Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-17color-words: take an optional regular expression describing wordsLibravatar Johannes Schindelin1-0/+57
In some applications, words are not delimited by white space. To allow for that, you can specify a regular expression describing what makes a word with git diff --color-words='[A-Za-z0-9]+' Note that words cannot contain newline characters. As suggested by Thomas Rast, the words are the exact matches of the regular expression. Note that a regular expression beginning with a '^' will match only a word at the beginning of the hunk, not a word at the beginning of a line, and is probably not what you want. This commit contains a quoting fix by Thomas Rast. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-17color-words: change algorithm to allow for 0-character word boundariesLibravatar Johannes Schindelin1-0/+66
Up until now, the color-words code assumed that word boundaries are identical to white space characters. Therefore, it could get away with a very simple scheme: it copied the hunks, substituted newlines for each white space character, called libxdiff with the processed text, and then identified the text to output by the offsets (which agreed since the original text had the same length). This code was ugly, for a number of reasons: - it was impossible to introduce 0-character word boundaries, - we had to print everything word by word, and - the code needed extra special handling of newlines in the removed part. Fix all of these issues by processing the text such that - we build word lists, separated by newlines, - we remember the original offsets for every word, and - after calling libxdiff on the wordlists, we parse the hunk headers, and find the corresponding offsets, and then - we print the removed/added parts in one go. The pre and post samples in the test were provided by Santi BĂ©jar. Note that there is some strange special handling of hunk headers where one line range is 0 due to POSIX: in this case, the start is one too low. In other words a hunk header '@@ -1,0 +2 @@' actually means that the line must be added after the _second_ line of the pre text, _not_ the first. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>