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line-range: teach -L/RE/ to search relative to anchor point

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Range specification -L/RE/ for blame/log unconditionally begins
searching at line one. Mailing list discussion [1] suggests that, in the
presence of multiple -L options, -L/RE/ should search relative to the
endpoint of the previous -L range, if any.

Teach the parsing machinery underlying blame's and log's -L options to
accept a start point for -L/RE/ searches. Follow-up patches will upgrade
blame and log to take advantage of this ability.

[1]: http://thread.gmane.org/gmane.comp.version-control.git/229755/focus=229966

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Eric Sunshine
2013-08-06 09:59:41 -04:00
committed by Junio C Hamano
parent 5bd9b79a20
commit 815834e9aa
4 changed files with 32 additions and 7 deletions
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2
line-log.c
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@ -591,7 +591,7 @@ parse_lines(struct commit *commit, const char *prefix, struct string_list *args)
cb_data.line_ends = ends;
if (parse_range_arg(range_part, nth_line, &cb_data,
lines, &begin, &end,
lines, 1, &begin, &end,
full_name))
die("malformed -L argument '%s'", range_part);
if (lines < end || ((lines || begin) && lines < begin))