linux-kernel - Re: [PATCH] get_maintainer: Extend matched name characters in maintainers_in

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Date:   Sun, 18 Sep 2022 10:03:17 -0700
From:   Joe Perches <joe@...ches.com>
To:     Janne Grunau <j@...nau.net>
Cc:     linux-kernel@...r.kernel.org,
        Martin Povišer <povik+lin@...ebit.org>
Subject: Re: [PATCH] get_maintainer: Extend matched name characters in
 maintainers_in_file()

On Sat, 2022-09-17 at 07:11 -0700, Joe Perches wrote:
> On Fri, 2022-09-16 at 10:47 +0200, Janne Grunau wrote:
> > Extend the regexp matching name characters to cover Unicode blocks Latin
> > Extended-A and Extended-B.
> > Fixes 'scripts/get_maintainer.pl -f' for
> > 'Documentation/devicetree/bindings/clock/apple,nco.yaml'.
> > 
> > Signed-off-by: Janne Grunau <j@...nau.net>
> > 
> > ---
> > This still excludes Greek and Cyrilic characters which should be
> > expected in names as well. I tried to use '\p{L}' to match all Unicode
> > letters but couldn't get it to work. Feel free understand this as bug
> > report with an incomplete fix.
> 
> Maybe use \p{XPosixAlpha} ?
> 
> but I don't know what version of perl introduced this.
> 
> > diff --git a/scripts/get_maintainer.pl b/scripts/get_maintainer.pl
> []
> > @@ -442,7 +442,7 @@ sub maintainers_in_file {
> >  	my $text = do { local($/) ; <$f> };
> >  	close($f);
> >  
> > -	my @poss_addr = $text =~ m$[A-Za-zÀ-ÿ\"\' \,\.\+-]*\s*[\,]*\s*[\(\<\{]{0,1}[A-Za-z0-9_\.\+-]+\@[A-Za-z0-9\.-]+\.[A-Za-z0-9]+[\)\>\}]{0,1}$g;
> > +	my @poss_addr = $text =~ m$[A-Za-zÀ-ɏ\"\' \,\.\+-]*\s*[\,]*\s*[\(\<\{]{0,1}[A-Za-z0-9_\.\+-]+\@[A-Za-z0-9\.-]+\.[A-Za-z0-9]+[\)\>\}]{0,1}$g;
> 
> 	my @poss_addr = $text =~ m$[\p{XPosixAlpha}\"\' \,\.\+-]*\s*[\,]*\s*[\(\<\{]{0,1}[A-Za-z0-9_\.\+-]+\@[A-Za-z0-9\.-]+\.[A-Za-z0-9]+[\)\>\}]{0,1}$g;

Using variations of \p{posix} doesn't seem to work for at least perl 5.34.

\p{print} seems to work for Documentation/devicetree/bindings/clock/apple,nco.yaml,
but I don't know how fragile it is.

\p{print} might be too greedy...

---
 scripts/get_maintainer.pl | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/scripts/get_maintainer.pl b/scripts/get_maintainer.pl
index ab123b498fd9..790112c3e1d7 100755
--- a/scripts/get_maintainer.pl
+++ b/scripts/get_maintainer.pl
@@ -442,7 +442,7 @@ sub maintainers_in_file {
 	my $text = do { local($/) ; <$f> };
 	close($f);
 
-	my @poss_addr = $text =~ m$[A-Za-zÀ-ÿ\"\' \,\.\+-]*\s*[\,]*\s*[\(\<\{]{0,1}[A-Za-z0-9_\.\+-]+\@[A-Za-z0-9\.-]+\.[A-Za-z0-9]+[\)\>\}]{0,1}$g;
+	my @poss_addr = $text =~ m$[\p{print}\"\' \,\.\+-]*\s*[\,]*\s*[\(\<\{]{0,1}[A-Za-z0-9_\.\+-]+\@[A-Za-z0-9\.-]+\.[A-Za-z0-9]+[\)\>\}]{0,1}$g;
 	push(@file_emails, clean_file_emails(@poss_addr));
     }
 }
@@ -2456,11 +2456,12 @@ sub clean_file_emails {
     foreach my $email (@file_emails) {
 	$email =~ s/[\(\<\{]{0,1}([A-Za-z0-9_\.\+-]+\@[A-Za-z0-9\.-]+)[\)\>\}]{0,1}/\<$1\>/g;
 	my ($name, $address) = parse_email($email);
+	$name =~ s/^\p{space}*\p{punct}*\p{space}*//;
 	if ($name eq '"[,\.]"') {
 	    $name = "";
 	}
 
-	my @nw = split(/[^A-Za-zÀ-ÿ\'\,\.\+-]/, $name);
+	my @nw = split(/[^\p{print}\'\,\.\+-]/, $name);
 	if (@nw > 2) {
 	    my $first = $nw[@nw - 3];
 	    my $middle = $nw[@nw - 2];