From eaae0ad9720428cd9e2bf9a40fedf137db95184f Mon Sep 17 00:00:00 2001
From: Jonathan Corbet <corbet@lwn.net>
Date: Wed, 13 Aug 2025 11:16:28 -0600
Subject: docs: move scripts/documentation-file-ref-check to tools/docs

Add this script to the growing collection of documentation tools.

Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---
 Documentation/Makefile                  |   4 +-
 MAINTAINERS                             |   2 -
 scripts/documentation-file-ref-check    | 245 --------------------------------
 tools/docs/documentation-file-ref-check | 245 ++++++++++++++++++++++++++++++++
 tools/docs/sphinx-pre-install           |   2 +-
 5 files changed, 248 insertions(+), 250 deletions(-)
 delete mode 100755 scripts/documentation-file-ref-check
 create mode 100755 tools/docs/documentation-file-ref-check

diff --git a/Documentation/Makefile b/Documentation/Makefile
index 65d184eab739..1476aa1701ce 100644
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -8,7 +8,7 @@ subdir- := devicetree/bindings
 ifneq ($(MAKECMDGOALS),cleandocs)
 # Check for broken documentation file references
 ifeq ($(CONFIG_WARN_MISSING_DOCUMENTS),y)
-$(shell $(srctree)/scripts/documentation-file-ref-check --warn)
+$(shell $(srctree)/tools/docs/documentation-file-ref-check --warn)
 endif
 
 # Check for broken ABI files
@@ -78,7 +78,7 @@ htmldocs-redirects: $(srctree)/Documentation/.renames.txt
 	@tools/docs/gen-redirects.py --output $(BUILDDIR) < $<
 
 refcheckdocs:
-	$(Q)cd $(srctree);scripts/documentation-file-ref-check
+	$(Q)cd $(srctree); tools/docs/documentation-file-ref-check
 
 cleandocs:
 	$(Q)rm -rf $(BUILDDIR)
diff --git a/MAINTAINERS b/MAINTAINERS
index cd187b9f1dc2..fc1da52433b6 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7411,7 +7411,6 @@ S:	Maintained
 P:	Documentation/doc-guide/maintainer-profile.rst
 T:	git git://git.lwn.net/linux.git docs-next
 F:	Documentation/
-F:	scripts/documentation-file-ref-check
 F:	scripts/get_abi.py
 F:	scripts/kernel-doc*
 F:	scripts/lib/abi/*
@@ -7451,7 +7450,6 @@ M:	Mauro Carvalho Chehab <mchehab@kernel.org>
 L:	linux-doc@vger.kernel.org
 S:	Maintained
 F:	Documentation/sphinx/parse-headers.pl
-F:	scripts/documentation-file-ref-check
 F:	tools/docs/sphinx-pre-install
 
 DOCUMENTATION/ITALIAN
diff --git a/scripts/documentation-file-ref-check b/scripts/documentation-file-ref-check
deleted file mode 100755
index 408b1dbe7884..000000000000
--- a/scripts/documentation-file-ref-check
+++ /dev/null
@@ -1,245 +0,0 @@
-#!/usr/bin/env perl
-# SPDX-License-Identifier: GPL-2.0
-#
-# Treewide grep for references to files under Documentation, and report
-# non-existing files in stderr.
-
-use warnings;
-use strict;
-use Getopt::Long qw(:config no_auto_abbrev);
-
-# NOTE: only add things here when the file was gone, but the text wants
-# to mention a past documentation file, for example, to give credits for
-# the original work.
-my %false_positives = (
-	"Documentation/scsi/scsi_mid_low_api.rst" => "Documentation/Configure.help",
-	"drivers/vhost/vhost.c" => "Documentation/virtual/lguest/lguest.c",
-);
-
-my $scriptname = $0;
-$scriptname =~ s,.*/([^/]+/),$1,;
-
-# Parse arguments
-my $help = 0;
-my $fix = 0;
-my $warn = 0;
-
-if (! -e ".git") {
-	printf "Warning: can't check if file exists, as this is not a git tree\n";
-	exit 0;
-}
-
-GetOptions(
-	'fix' => \$fix,
-	'warn' => \$warn,
-	'h|help|usage' => \$help,
-);
-
-if ($help != 0) {
-    print "$scriptname [--help] [--fix]\n";
-    exit -1;
-}
-
-# Step 1: find broken references
-print "Finding broken references. This may take a while...  " if ($fix);
-
-my %broken_ref;
-
-my $doc_fix = 0;
-
-open IN, "git grep ':doc:\`' Documentation/|"
-     or die "Failed to run git grep";
-while (<IN>) {
-	next if (!m,^([^:]+):.*\:doc\:\`([^\`]+)\`,);
-	next if (m,sphinx/,);
-
-	my $file = $1;
-	my $d = $1;
-	my $doc_ref = $2;
-
-	my $f = $doc_ref;
-
-	$d =~ s,(.*/).*,$1,;
-	$f =~ s,.*\<([^\>]+)\>,$1,;
-
-	if ($f =~ m,^/,) {
-		$f = "$f.rst";
-		$f =~ s,^/,Documentation/,;
-	} else {
-		$f = "$d$f.rst";
-	}
-
-	next if (grep -e, glob("$f"));
-
-	if ($fix && !$doc_fix) {
-		print STDERR "\nWARNING: Currently, can't fix broken :doc:`` fields\n";
-	}
-	$doc_fix++;
-
-	print STDERR "$file: :doc:`$doc_ref`\n";
-}
-close IN;
-
-open IN, "git grep 'Documentation/'|"
-     or die "Failed to run git grep";
-while (<IN>) {
-	next if (!m/^([^:]+):(.*)/);
-
-	my $f = $1;
-	my $ln = $2;
-
-	# On linux-next, discard the Next/ directory
-	next if ($f =~ m,^Next/,);
-
-	# Makefiles and scripts contain nasty expressions to parse docs
-	next if ($f =~ m/Makefile/ || $f =~ m/\.(sh|py|pl|~|rej|org|orig)$/);
-
-	# It doesn't make sense to parse hidden files
-	next if ($f =~ m#/\.#);
-
-	# Skip this script
-	next if ($f eq $scriptname);
-
-	# Ignore the dir where documentation will be built
-	next if ($ln =~ m,\b(\S*)Documentation/output,);
-
-	if ($ln =~ m,\b(\S*)(Documentation/[A-Za-z0-9\_\.\,\~/\*\[\]\?+-]*)(.*),) {
-		my $prefix = $1;
-		my $ref = $2;
-		my $base = $2;
-		my $extra = $3;
-
-		# some file references are like:
-		# /usr/src/linux/Documentation/DMA-{API,mapping}.txt
-		# For now, ignore them
-		next if ($extra =~ m/^{/);
-
-		# Remove footnotes at the end like:
-		# Documentation/devicetree/dt-object-internal.txt[1]
-		$ref =~ s/(txt|rst)\[\d+]$/$1/;
-
-		# Remove ending ']' without any '['
-		$ref =~ s/\].*// if (!($ref =~ m/\[/));
-
-		# Remove puntuation marks at the end
-		$ref =~ s/[\,\.]+$//;
-
-		my $fulref = "$prefix$ref";
-
-		$fulref =~ s/^(\<file|ref)://;
-		$fulref =~ s/^[\'\`]+//;
-		$fulref =~ s,^\$\(.*\)/,,;
-		$base =~ s,.*/,,;
-
-		# Remove URL false-positives
-		next if ($fulref =~ m/^http/);
-
-		# Remove sched-pelt false-positive
-		next if ($fulref =~ m,^Documentation/scheduler/sched-pelt$,);
-
-		# Discard some build examples from Documentation/target/tcm_mod_builder.rst
-		next if ($fulref =~ m,mnt/sdb/lio-core-2.6.git/Documentation/target,);
-
-		# Check if exists, evaluating wildcards
-		next if (grep -e, glob("$ref $fulref"));
-
-		# Accept relative Documentation patches for tools/
-		if ($f =~ m/tools/) {
-			my $path = $f;
-			$path =~ s,(.*)/.*,$1,;
-			$path =~ s,testing/selftests/bpf,bpf/bpftool,;
-			next if (grep -e, glob("$path/$ref $path/../$ref $path/$fulref"));
-		}
-
-		# Discard known false-positives
-		if (defined($false_positives{$f})) {
-			next if ($false_positives{$f} eq $fulref);
-		}
-
-		if ($fix) {
-			if (!($ref =~ m/(scripts|Kconfig|Kbuild)/)) {
-				$broken_ref{$ref}++;
-			}
-		} elsif ($warn) {
-			print STDERR "Warning: $f references a file that doesn't exist: $fulref\n";
-		} else {
-			print STDERR "$f: $fulref\n";
-		}
-	}
-}
-close IN;
-
-exit 0 if (!$fix);
-
-# Step 2: Seek for file name alternatives
-print "Auto-fixing broken references. Please double-check the results\n";
-
-foreach my $ref (keys %broken_ref) {
-	my $new =$ref;
-
-	my $basedir = ".";
-	# On translations, only seek inside the translations directory
-	$basedir  = $1 if ($ref =~ m,(Documentation/translations/[^/]+),);
-
-	# get just the basename
-	$new =~ s,.*/,,;
-
-	my $f="";
-
-	# usual reason for breakage: DT file moved around
-	if ($ref =~ /devicetree/) {
-		# usual reason for breakage: DT file renamed to .yaml
-		if (!$f) {
-			my $new_ref = $ref;
-			$new_ref =~ s/\.txt$/.yaml/;
-			$f=$new_ref if (-f $new_ref);
-		}
-
-		if (!$f) {
-			my $search = $new;
-			$search =~ s,^.*/,,;
-			$f = qx(find Documentation/devicetree/ -iname "*$search*") if ($search);
-			if (!$f) {
-				# Manufacturer name may have changed
-				$search =~ s/^.*,//;
-				$f = qx(find Documentation/devicetree/ -iname "*$search*") if ($search);
-			}
-		}
-	}
-
-	# usual reason for breakage: file renamed to .rst
-	if (!$f) {
-		$new =~ s/\.txt$/.rst/;
-		$f=qx(find $basedir -iname $new) if ($new);
-	}
-
-	# usual reason for breakage: use dash or underline
-	if (!$f) {
-		$new =~ s/[-_]/[-_]/g;
-		$f=qx(find $basedir -iname $new) if ($new);
-	}
-
-	# Wild guess: seek for the same name on another place
-	if (!$f) {
-		$f = qx(find $basedir -iname $new) if ($new);
-	}
-
-	my @find = split /\s+/, $f;
-
-	if (!$f) {
-		print STDERR "ERROR: Didn't find a replacement for $ref\n";
-	} elsif (scalar(@find) > 1) {
-		print STDERR "WARNING: Won't auto-replace, as found multiple files close to $ref:\n";
-		foreach my $j (@find) {
-			$j =~ s,^./,,;
-			print STDERR "    $j\n";
-		}
-	} else {
-		$f = $find[0];
-		$f =~ s,^./,,;
-		print "INFO: Replacing $ref to $f\n";
-		foreach my $j (qx(git grep -l $ref)) {
-			qx(sed "s\@$ref\@$f\@g" -i $j);
-		}
-	}
-}
diff --git a/tools/docs/documentation-file-ref-check b/tools/docs/documentation-file-ref-check
new file mode 100755
index 000000000000..0cad42f6943b
--- /dev/null
+++ b/tools/docs/documentation-file-ref-check
@@ -0,0 +1,245 @@
+#!/usr/bin/env perl
+# SPDX-License-Identifier: GPL-2.0
+#
+# Treewide grep for references to files under Documentation, and report
+# non-existing files in stderr.
+
+use warnings;
+use strict;
+use Getopt::Long qw(:config no_auto_abbrev);
+
+# NOTE: only add things here when the file was gone, but the text wants
+# to mention a past documentation file, for example, to give credits for
+# the original work.
+my %false_positives = (
+	"Documentation/scsi/scsi_mid_low_api.rst" => "Documentation/Configure.help",
+	"drivers/vhost/vhost.c" => "Documentation/virtual/lguest/lguest.c",
+);
+
+my $scriptname = $0;
+$scriptname =~ s,tools/docs/([^/]+/),$1,;
+
+# Parse arguments
+my $help = 0;
+my $fix = 0;
+my $warn = 0;
+
+if (! -e ".git") {
+	printf "Warning: can't check if file exists, as this is not a git tree\n";
+	exit 0;
+}
+
+GetOptions(
+	'fix' => \$fix,
+	'warn' => \$warn,
+	'h|help|usage' => \$help,
+);
+
+if ($help != 0) {
+    print "$scriptname [--help] [--fix]\n";
+    exit -1;
+}
+
+# Step 1: find broken references
+print "Finding broken references. This may take a while...  " if ($fix);
+
+my %broken_ref;
+
+my $doc_fix = 0;
+
+open IN, "git grep ':doc:\`' Documentation/|"
+     or die "Failed to run git grep";
+while (<IN>) {
+	next if (!m,^([^:]+):.*\:doc\:\`([^\`]+)\`,);
+	next if (m,sphinx/,);
+
+	my $file = $1;
+	my $d = $1;
+	my $doc_ref = $2;
+
+	my $f = $doc_ref;
+
+	$d =~ s,(.*/).*,$1,;
+	$f =~ s,.*\<([^\>]+)\>,$1,;
+
+	if ($f =~ m,^/,) {
+		$f = "$f.rst";
+		$f =~ s,^/,Documentation/,;
+	} else {
+		$f = "$d$f.rst";
+	}
+
+	next if (grep -e, glob("$f"));
+
+	if ($fix && !$doc_fix) {
+		print STDERR "\nWARNING: Currently, can't fix broken :doc:`` fields\n";
+	}
+	$doc_fix++;
+
+	print STDERR "$file: :doc:`$doc_ref`\n";
+}
+close IN;
+
+open IN, "git grep 'Documentation/'|"
+     or die "Failed to run git grep";
+while (<IN>) {
+	next if (!m/^([^:]+):(.*)/);
+
+	my $f = $1;
+	my $ln = $2;
+
+	# On linux-next, discard the Next/ directory
+	next if ($f =~ m,^Next/,);
+
+	# Makefiles and scripts contain nasty expressions to parse docs
+	next if ($f =~ m/Makefile/ || $f =~ m/\.(sh|py|pl|~|rej|org|orig)$/);
+
+	# It doesn't make sense to parse hidden files
+	next if ($f =~ m#/\.#);
+
+	# Skip this script
+	next if ($f eq $scriptname);
+
+	# Ignore the dir where documentation will be built
+	next if ($ln =~ m,\b(\S*)Documentation/output,);
+
+	if ($ln =~ m,\b(\S*)(Documentation/[A-Za-z0-9\_\.\,\~/\*\[\]\?+-]*)(.*),) {
+		my $prefix = $1;
+		my $ref = $2;
+		my $base = $2;
+		my $extra = $3;
+
+		# some file references are like:
+		# /usr/src/linux/Documentation/DMA-{API,mapping}.txt
+		# For now, ignore them
+		next if ($extra =~ m/^{/);
+
+		# Remove footnotes at the end like:
+		# Documentation/devicetree/dt-object-internal.txt[1]
+		$ref =~ s/(txt|rst)\[\d+]$/$1/;
+
+		# Remove ending ']' without any '['
+		$ref =~ s/\].*// if (!($ref =~ m/\[/));
+
+		# Remove puntuation marks at the end
+		$ref =~ s/[\,\.]+$//;
+
+		my $fulref = "$prefix$ref";
+
+		$fulref =~ s/^(\<file|ref)://;
+		$fulref =~ s/^[\'\`]+//;
+		$fulref =~ s,^\$\(.*\)/,,;
+		$base =~ s,.*/,,;
+
+		# Remove URL false-positives
+		next if ($fulref =~ m/^http/);
+
+		# Remove sched-pelt false-positive
+		next if ($fulref =~ m,^Documentation/scheduler/sched-pelt$,);
+
+		# Discard some build examples from Documentation/target/tcm_mod_builder.rst
+		next if ($fulref =~ m,mnt/sdb/lio-core-2.6.git/Documentation/target,);
+
+		# Check if exists, evaluating wildcards
+		next if (grep -e, glob("$ref $fulref"));
+
+		# Accept relative Documentation patches for tools/
+		if ($f =~ m/tools/) {
+			my $path = $f;
+			$path =~ s,(.*)/.*,$1,;
+			$path =~ s,testing/selftests/bpf,bpf/bpftool,;
+			next if (grep -e, glob("$path/$ref $path/../$ref $path/$fulref"));
+		}
+
+		# Discard known false-positives
+		if (defined($false_positives{$f})) {
+			next if ($false_positives{$f} eq $fulref);
+		}
+
+		if ($fix) {
+			if (!($ref =~ m/(scripts|Kconfig|Kbuild)/)) {
+				$broken_ref{$ref}++;
+			}
+		} elsif ($warn) {
+			print STDERR "Warning: $f references a file that doesn't exist: $fulref\n";
+		} else {
+			print STDERR "$f: $fulref\n";
+		}
+	}
+}
+close IN;
+
+exit 0 if (!$fix);
+
+# Step 2: Seek for file name alternatives
+print "Auto-fixing broken references. Please double-check the results\n";
+
+foreach my $ref (keys %broken_ref) {
+	my $new =$ref;
+
+	my $basedir = ".";
+	# On translations, only seek inside the translations directory
+	$basedir  = $1 if ($ref =~ m,(Documentation/translations/[^/]+),);
+
+	# get just the basename
+	$new =~ s,.*/,,;
+
+	my $f="";
+
+	# usual reason for breakage: DT file moved around
+	if ($ref =~ /devicetree/) {
+		# usual reason for breakage: DT file renamed to .yaml
+		if (!$f) {
+			my $new_ref = $ref;
+			$new_ref =~ s/\.txt$/.yaml/;
+			$f=$new_ref if (-f $new_ref);
+		}
+
+		if (!$f) {
+			my $search = $new;
+			$search =~ s,^.*/,,;
+			$f = qx(find Documentation/devicetree/ -iname "*$search*") if ($search);
+			if (!$f) {
+				# Manufacturer name may have changed
+				$search =~ s/^.*,//;
+				$f = qx(find Documentation/devicetree/ -iname "*$search*") if ($search);
+			}
+		}
+	}
+
+	# usual reason for breakage: file renamed to .rst
+	if (!$f) {
+		$new =~ s/\.txt$/.rst/;
+		$f=qx(find $basedir -iname $new) if ($new);
+	}
+
+	# usual reason for breakage: use dash or underline
+	if (!$f) {
+		$new =~ s/[-_]/[-_]/g;
+		$f=qx(find $basedir -iname $new) if ($new);
+	}
+
+	# Wild guess: seek for the same name on another place
+	if (!$f) {
+		$f = qx(find $basedir -iname $new) if ($new);
+	}
+
+	my @find = split /\s+/, $f;
+
+	if (!$f) {
+		print STDERR "ERROR: Didn't find a replacement for $ref\n";
+	} elsif (scalar(@find) > 1) {
+		print STDERR "WARNING: Won't auto-replace, as found multiple files close to $ref:\n";
+		foreach my $j (@find) {
+			$j =~ s,^./,,;
+			print STDERR "    $j\n";
+		}
+	} else {
+		$f = $find[0];
+		$f =~ s,^./,,;
+		print "INFO: Replacing $ref to $f\n";
+		foreach my $j (qx(git grep -l $ref)) {
+			qx(sed "s\@$ref\@$f\@g" -i $j);
+		}
+	}
+}
diff --git a/tools/docs/sphinx-pre-install b/tools/docs/sphinx-pre-install
index 698989584b6a..647e1f60357f 100755
--- a/tools/docs/sphinx-pre-install
+++ b/tools/docs/sphinx-pre-install
@@ -313,7 +313,7 @@ class MissingCheckers(AncillaryMethods):
         Right now, we still need Perl for doc build, as it is required
         by some tools called at docs or kernel build time, like:
 
-            scripts/documentation-file-ref-check
+            tools/docs/documentation-file-ref-check
 
         Also, checkpatch is on Perl.
         """
-- 
cgit v1.2.3