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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/scripts/documentation-file-ref-check
..
..
@@ -8,15 +8,30 @@
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 use strict;
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 use Getopt::Long qw(:config no_auto_abbrev);
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10
 
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+# NOTE: only add things here when the file was gone, but the text wants
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+# to mention a past documentation file, for example, to give credits for
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+# the original work.
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+my %false_positives = (
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+	"Documentation/scsi/scsi_mid_low_api.rst" => "Documentation/Configure.help",
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+	"drivers/vhost/vhost.c" => "Documentation/virtual/lguest/lguest.c",
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+);
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+
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 my $scriptname = $0;
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 $scriptname =~ s,.*/([^/]+/),$1,;
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21
 
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 # Parse arguments
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 my $help = 0;
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 my $fix = 0;
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+my $warn = 0;
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+
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+if (! -d ".git") {
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+	printf "Warning: can't check if file exists, as this is not a git tree\n";
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+	exit 0;
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+}
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31
 
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 GetOptions(
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 	'fix' => \$fix,
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+	'warn' => \$warn,
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 	'h|help|usage' => \$help,
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 );
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..
..
@@ -30,6 +45,41 @@
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45
 
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 my %broken_ref;
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47
 
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+my $doc_fix = 0;
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+
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+open IN, "git grep ':doc:\`' Documentation/|"
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+     or die "Failed to run git grep";
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+while (<IN>) {
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+	next if (!m,^([^:]+):.*\:doc\:\`([^\`]+)\`,);
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+	next if (m,sphinx/,);
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+
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+	my $file = $1;
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+	my $d = $1;
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+	my $doc_ref = $2;
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+
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+	my $f = $doc_ref;
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+
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+	$d =~ s,(.*/).*,$1,;
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+	$f =~ s,.*\<([^\>]+)\>,$1,;
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+
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+	if ($f =~ m,^/,) {
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+		$f = "$f.rst";
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+		$f =~ s,^/,Documentation/,;
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+	} else {
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+		$f = "$d$f.rst";
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+	}
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+
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+	next if (grep -e, glob("$f"));
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+
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+	if ($fix && !$doc_fix) {
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+		print STDERR "\nWARNING: Currently, can't fix broken :doc:`` fields\n";
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+	}
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+	$doc_fix++;
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+
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+	print STDERR "$file: :doc:`$doc_ref`\n";
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+}
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+close IN;
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+
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 open IN, "git grep 'Documentation/'|"
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      or die "Failed to run git grep";
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 while (<IN>) {
..
..
@@ -38,11 +88,17 @@
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 	my $f = $1;
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 	my $ln = $2;
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90
 
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+	# On linux-next, discard the Next/ directory
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+	next if ($f =~ m,^Next/,);
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+
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 	# Makefiles and scripts contain nasty expressions to parse docs
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 	next if ($f =~ m/Makefile/ || $f =~ m/\.sh$/);
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96
 
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 	# Skip this script
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 	next if ($f eq $scriptname);
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+
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+	# Ignore the dir where documentation will be built
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+	next if ($ln =~ m,\b(\S*)Documentation/output,);
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102
 
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 	if ($ln =~ m,\b(\S*)(Documentation/[A-Za-z0-9\_\.\,\~/\*\[\]\?+-]*)(.*),) {
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 		my $prefix = $1;
..
..
@@ -78,7 +134,7 @@
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 		# Remove sched-pelt false-positive
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 		next if ($fulref =~ m,^Documentation/scheduler/sched-pelt$,);
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136
 
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-		# Discard some build examples from Documentation/target/tcm_mod_builder.txt
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+		# Discard some build examples from Documentation/target/tcm_mod_builder.rst
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 		next if ($fulref =~ m,mnt/sdb/lio-core-2.6.git/Documentation/target,);
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139
 
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 		# Check if exists, evaluating wildcards
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@@ -88,18 +144,26 @@
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 		if ($f =~ m/tools/) {
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 			my $path = $f;
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 			$path =~ s,(.*)/.*,$1,;
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-			next if (grep -e, glob("$path/$ref $path/$fulref"));
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+			next if (grep -e, glob("$path/$ref $path/../$ref $path/$fulref"));
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+		}
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+
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+		# Discard known false-positives
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+		if (defined($false_positives{$f})) {
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+			next if ($false_positives{$f} eq $fulref);
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 		}
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 		if ($fix) {
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 			if (!($ref =~ m/(scripts|Kconfig|Kbuild)/)) {
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 				$broken_ref{$ref}++;
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 			}
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+		} elsif ($warn) {
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+			print STDERR "Warning: $f references a file that doesn't exist: $fulref\n";
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 		} else {
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 			print STDERR "$f: $fulref\n";
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 		}
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 	}
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 }
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+close IN;
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167
 
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 exit 0 if (!$fix);
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169
 
..
..
@@ -109,6 +173,10 @@
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 foreach my $ref (keys %broken_ref) {
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 	my $new =$ref;
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175
 
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+	my $basedir = ".";
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+	# On translations, only seek inside the translations directory
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+	$basedir  = $1 if ($ref =~ m,(Documentation/translations/[^/]+),);
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+
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 	# get just the basename
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 	$new =~ s,.*/,,;
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182
 
..
..
@@ -116,31 +184,40 @@
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184
 
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 	# usual reason for breakage: DT file moved around
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186
 	if ($ref =~ /devicetree/) {
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-		my $search = $new;
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-		$search =~ s,^.*/,,;
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-		$f = qx(find Documentation/devicetree/ -iname "*$search*") if ($search);
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+		# usual reason for breakage: DT file renamed to .yaml
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 		if (!$f) {
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-			# Manufacturer name may have changed
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-			$search =~ s/^.*,//;
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+			my $new_ref = $ref;
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+			$new_ref =~ s/\.txt$/.yaml/;
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+			$f=$new_ref if (-f $new_ref);
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+		}
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+
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+		if (!$f) {
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+			my $search = $new;
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+			$search =~ s,^.*/,,;
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 			$f = qx(find Documentation/devicetree/ -iname "*$search*") if ($search);
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+			if (!$f) {
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+				# Manufacturer name may have changed
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+				$search =~ s/^.*,//;
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+				$f = qx(find Documentation/devicetree/ -iname "*$search*") if ($search);
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+			}
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 		}
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 	}
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205
 
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 	# usual reason for breakage: file renamed to .rst
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 	if (!$f) {
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 		$new =~ s/\.txt$/.rst/;
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-		$f=qx(find . -iname $new) if ($new);
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+		$f=qx(find $basedir -iname $new) if ($new);
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 	}
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 	# usual reason for breakage: use dash or underline
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 	if (!$f) {
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 		$new =~ s/[-_]/[-_]/g;
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-		$f=qx(find . -iname $new) if ($new);
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+		$f=qx(find $basedir -iname $new) if ($new);
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 	}
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217
 
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 	# Wild guess: seek for the same name on another place
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 	if (!$f) {
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-		$f = qx(find . -iname $new) if ($new);
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+		$f = qx(find $basedir -iname $new) if ($new);
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 	}
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222
 
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 	my @find = split /\s+/, $f;