[PATCH 3/5] checkpatch: Improve space before tab --fix option

[Joe Perches]

This test should remove all the spaces before a tab not
just one space.

Substitute a tab for each 8 space block before a tab and
remove less than 8 spaces before a tab.

This SPACE_BEFORE_TAB test is done after CODE_INDENT.

If there are spaces used at the beginning of a line that
should be converted to tabs, please make sure that the
CODE_INDENT test and conversion is done before this
SPACE_BEFORE_TAB test and conversion.

Reported-by: Manfred Spraul <manfred@xxxxxxxxxxxxxxxx>
Signed-off-by: Joe Perches <joe@xxxxxxxxxxx>
---
 scripts/checkpatch.pl | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 19376b4..db72b88 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2118,8 +2118,10 @@ sub process {
 			if (WARN("SPACE_BEFORE_TAB",
 				"please, no space before tabs\n" . $herevet) &&
 			    $fix) {
-				$fixed[$linenr - 1] =~
-				    s/(^\+.*) +\t/$1\t/;
+				while ($fixed[$linenr - 1] =~
+					   s/(^\+.*) {8,8}+\t/$1\t\t/) {}
+				while ($fixed[$linenr - 1] =~
+					   s/(^\+.*) +\t/$1\t/) {}
 			}
 		}
 
-- 
1.8.1.2.459.gbcd45b4.dirty

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