[Linux-kernel-mentees] [PATCH] checkpatch: fix TYPO_SPELLING check for words with apostrophe

[Joe Perches]

On Mon, 2020-11-30 at 23:02 +0530, Dwaipayan Ray wrote:
> Sorry I think i explained wrong. For words like "doesn't", it still
> has the same problem.

I think you explained it wrong when you didn't mention this is
_only_ a problem when using --codespell.

Likely it'd be better to use "(?:^|\s)($misspellings)(?=\s|$)"

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 7dc094445d83..b1783f02f745 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3106,7 +3106,7 @@ sub process {
 # Check for various typo / spelling mistakes
 		if (defined($misspellings) &&
 		    ($in_commit_log || $line =~ /^(?:\+|Subject:)/i)) {
-			while ($rawline =~ /(?:^|[^a-z@])($misspellings)(?:\b|$|[^a-z@])/gi) {
+			while ($rawline =~ /(?:^|\s)($misspellings)(?=\s|$)/gi) {
 				my $typo = $1;
 				my $typo_fix = $spelling_fix{lc($typo)};
 				$typo_fix = ucfirst($typo_fix) if ($typo =~ /^[A-Z]/);

$ cat t_spell.c
// SPDX-License-Identifier: GPL-2.0-only
void foo(void)
{
	//misspelled doesn' doesn't arne't word
}

$ ./scripts/checkpatch.pl -f --strict t_spell.c --codespell --codespellfile /usr/lib/python3/dist-packages/codespell_lib/data/dictionary.txt
CHECK: 'doesn'' may be misspelled - perhaps 'doesn't'?
#4: FILE: t_spell.c:4:
+	//misspelled doesn' doesn't arne't word

CHECK: 'arne't' may be misspelled - perhaps 'aren't'?
#4: FILE: t_spell.c:4:
+	//misspelled doesn' doesn't arne't word

total: 0 errors, 0 warnings, 2 checks, 5 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

t_spell.c has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.