get_maintainer: add ** glob pattern support

Add support for the ** glob operator in MAINTAINERS F: and X: patterns,
matching any number of path components (like Python's ** glob).

The existing * to .* conversion with slash-count check is preserved.  **
is converted to (?:.*), a non-capturing group used as a marker to bypass
the slash-count check in file_match_pattern(), allowing the pattern to
cross directory boundaries.

This enables patterns like F: **/*[_-]kunit*.c to match files at any depth
in the tree.

Link: https://lkml.kernel.org/r/20260302103822.77343-1-teknoraver@meta.com
Signed-off-by: Matteo Croce <teknoraver@meta.com>
Acked-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/MAINTAINERS b/MAINTAINERS
index 7d10988cbc62b77515aa1a1fee1c7d3e594869fa..83e3e87aa053b68359b15720e2b80331cf3f53ea 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -35,6 +35,7 @@ Descriptions of section entries and preferred order
           F:   drivers/net/    all files in and below drivers/net
           F:   drivers/net/*   all files in drivers/net, but not below
           F:   */net/*         all files in "any top level directory"/net
+          F:   fs/**/*foo*.c   all *foo*.c files in any subdirectory of fs
           One pattern per line.  Multiple F: lines acceptable.
        X: *Excluded* files and directories that are NOT maintained, same
           rules as F:. Files exclusions are tested before file matches.

diff --git a/scripts/get_maintainer.pl b/scripts/get_maintainer.pl
index 4414194bedcfd747bd24199b5de9ccf04bf6d227..f0ca0db6ddc274225f6a90ab7b81e52cfd612e66 100755 (executable)
--- a/scripts/get_maintainer.pl
+++ b/scripts/get_maintainer.pl
@@ -375,8 +375,10 @@ sub read_maintainer_file {
            ##Filename pattern matching
            if ($type eq "F" || $type eq "X") {
                $value =~ s@\.@\\\.@g;       ##Convert . to \.
+               $value =~ s/\*\*/\x00/g;     ##Convert ** to placeholder
                $value =~ s/\*/\.\*/g;       ##Convert * to .*
                $value =~ s/\?/\./g;         ##Convert ? to .
+               $value =~ s/\x00/(?:.*)/g;   ##Convert placeholder to (?:.*)
                ##if pattern is a directory and it lacks a trailing slash, add one
                if ((-d $value)) {
                    $value =~ s@([^/])$@$1/@;
@@ -746,8 +748,10 @@ sub self_test {
        if (($type eq "F" || $type eq "X") &&
            ($self_test eq "" || $self_test =~ /\bpatterns\b/)) {
            $value =~ s@\.@\\\.@g;       ##Convert . to \.
+           $value =~ s/\*\*/\x00/g;     ##Convert ** to placeholder
            $value =~ s/\*/\.\*/g;       ##Convert * to .*
            $value =~ s/\?/\./g;         ##Convert ? to .
+           $value =~ s/\x00/(?:.*)/g;   ##Convert placeholder to (?:.*)
            ##if pattern is a directory and it lacks a trailing slash, add one
            if ((-d $value)) {
                $value =~ s@([^/])$@$1/@;
@@ -921,7 +925,7 @@ sub get_maintainers {
                                my $value_pd = ($value =~ tr@/@@);
                                my $file_pd = ($file  =~ tr@/@@);
                                $value_pd++ if (substr($value,-1,1) ne "/");
-                               $value_pd = -1 if ($value =~ /^\.\*/);
+                               $value_pd = -1 if ($value =~ /^(\.\*|\(\?:\.\*\))/);
                                if ($value_pd >= $file_pd &&
                                    range_is_maintained($start, $end) &&
                                    range_has_maintainer($start, $end)) {
@@ -955,6 +959,7 @@ sub get_maintainers {
                        $line =~ s/([^\\])\.([^\*])/$1\?$2/g;
                        $line =~ s/([^\\])\.$/$1\?/g;   ##Convert . back to ?
                        $line =~ s/\\\./\./g;           ##Convert \. to .
+                       $line =~ s/\(\?:\.\*\)/\*\*/g;  ##Convert (?:.*) to **
                        $line =~ s/\.\*/\*/g;           ##Convert .* to *
                    }
                    my $count = $line =~ s/^([A-Z]):/$1:\t/g;
@@ -1048,7 +1053,7 @@ sub file_match_pattern {
        if ($file =~ m@^$pattern@) {
            my $s1 = ($file =~ tr@/@@);
            my $s2 = ($pattern =~ tr@/@@);
-           if ($s1 == $s2) {
+           if ($s1 == $s2 || $pattern =~ /\(\?:/) {
                return 1;
            }
        }