blame: accept --need-minimal

Between v1.7.1 and v1.7.2, 582aa00bdffb switched the default "diff"
invocation not to use XDF_NEED_MINIMAL, but this breaks "git blame"
rather badly.

Allow the command line option to ask for an extra careful matching.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/blame.c b/builtin/blame.c
index 5a67c202f06abeaa90a7547d78b536f7f2b9db24..a8d66796bb41297adc6c653e2909629ffd440f04 100644 (file)
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -2320,6 +2320,7 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
                OPT_BIT('s', NULL, &output_option, "Suppress author name and timestamp (Default: off)", OUTPUT_NO_AUTHOR),
                OPT_BIT('e', "show-email", &output_option, "Show author email instead of name (Default: off)", OUTPUT_SHOW_EMAIL),
                OPT_BIT('w', NULL, &xdl_opts, "Ignore whitespace differences", XDF_IGNORE_WHITESPACE),
+               OPT_BIT(0, "minimal", &xdl_opts, "Spend extra cycles to find better match", XDF_NEED_MINIMAL),
                OPT_STRING('S', NULL, &revs_file, "file", "Use revisions from <file> instead of calling git-rev-list"),
                OPT_STRING(0, "contents", &contents_from, "file", "Use <file>'s contents as the final image"),
                { OPTION_CALLBACK, 'C', NULL, &opt, "score", "Find line copies within and across files", PARSE_OPT_OPTARG, blame_copy_callback },