2 # SPDX-License-Identifier: GPL-2.0
4 # Treewide grep for references to files under Documentation, and report
5 # non-existing files in stderr.
9 use Getopt::Long qw(:config no_auto_abbrev);
11 # NOTE: only add things here when the file was gone, but the text wants
12 # to mention a past documentation file, for example, to give credits for
14 my %false_positives = (
15 "Documentation/scsi/scsi_mid_low_api.rst" => "Documentation/Configure.help",
16 "drivers/vhost/vhost.c" => "Documentation/virtual/lguest/lguest.c",
20 $scriptname =~ s,.*/([^/]+/),$1,;
28 printf "Warning: can't check if file exists, as this is not a git tree\n";
35 'h|help|usage' => \$help,
39 print "$scriptname [--help] [--fix]\n";
43 # Step 1: find broken references
44 print "Finding broken references. This may take a while... " if ($fix);
50 open IN, "git grep ':doc:\`' Documentation/|"
51 or die "Failed to run git grep";
53 next if (!m,^([^:]+):.*\:doc\:\`([^\`]+)\`,);
63 $f =~ s,.*\<([^\>]+)\>,$1,;
67 $f =~ s,^/,Documentation/,;
72 next if (grep -e, glob("$f"));
74 if ($fix && !$doc_fix) {
75 print STDERR "\nWARNING: Currently, can't fix broken :doc:`` fields\n";
79 print STDERR "$file: :doc:`$doc_ref`\n";
83 open IN, "git grep 'Documentation/'|"
84 or die "Failed to run git grep";
86 next if (!m/^([^:]+):(.*)/);
91 # On linux-next, discard the Next/ directory
92 next if ($f =~ m,^Next/,);
94 # Makefiles and scripts contain nasty expressions to parse docs
95 next if ($f =~ m/Makefile/ || $f =~ m/\.sh$/);
98 next if ($f eq $scriptname);
100 # Ignore the dir where documentation will be built
101 next if ($ln =~ m,\b(\S*)Documentation/output,);
103 if ($ln =~ m,\b(\S*)(Documentation/[A-Za-z0-9\_\.\,\~/\*\[\]\?+-]*)(.*),) {
109 # some file references are like:
110 # /usr/src/linux/Documentation/DMA-{API,mapping}.txt
111 # For now, ignore them
112 next if ($extra =~ m/^{/);
114 # Remove footnotes at the end like:
115 # Documentation/devicetree/dt-object-internal.txt[1]
116 $ref =~ s/(txt|rst)\[\d+]$/$1/;
118 # Remove ending ']' without any '['
119 $ref =~ s/\].*// if (!($ref =~ m/\[/));
121 # Remove puntuation marks at the end
122 $ref =~ s/[\,\.]+$//;
124 my $fulref = "$prefix$ref";
126 $fulref =~ s/^(\<file|ref)://;
127 $fulref =~ s/^[\'\`]+//;
128 $fulref =~ s,^\$\(.*\)/,,;
131 # Remove URL false-positives
132 next if ($fulref =~ m/^http/);
134 # Remove sched-pelt false-positive
135 next if ($fulref =~ m,^Documentation/scheduler/sched-pelt$,);
137 # Discard some build examples from Documentation/target/tcm_mod_builder.rst
138 next if ($fulref =~ m,mnt/sdb/lio-core-2.6.git/Documentation/target,);
140 # Check if exists, evaluating wildcards
141 next if (grep -e, glob("$ref $fulref"));
143 # Accept relative Documentation patches for tools/
144 if ($f =~ m/tools/) {
146 $path =~ s,(.*)/.*,$1,;
147 next if (grep -e, glob("$path/$ref $path/../$ref $path/$fulref"));
150 # Discard known false-positives
151 if (defined($false_positives{$f})) {
152 next if ($false_positives{$f} eq $fulref);
156 if (!($ref =~ m/(scripts|Kconfig|Kbuild)/)) {
160 print STDERR "Warning: $f references a file that doesn't exist: $fulref\n";
162 print STDERR "$f: $fulref\n";
170 # Step 2: Seek for file name alternatives
171 print "Auto-fixing broken references. Please double-check the results\n";
173 foreach my $ref (keys %broken_ref) {
177 # On translations, only seek inside the translations directory
178 $basedir = $1 if ($ref =~ m,(Documentation/translations/[^/]+),);
180 # get just the basename
185 # usual reason for breakage: DT file moved around
186 if ($ref =~ /devicetree/) {
187 # usual reason for breakage: DT file renamed to .yaml
190 $new_ref =~ s/\.txt$/.yaml/;
191 $f=$new_ref if (-f $new_ref);
197 $f = qx(find Documentation/devicetree/ -iname "*$search*") if ($search);
199 # Manufacturer name may have changed
201 $f = qx(find Documentation/devicetree/ -iname "*$search*") if ($search);
206 # usual reason for breakage: file renamed to .rst
208 $new =~ s/\.txt$/.rst/;
209 $f=qx(find $basedir -iname $new) if ($new);
212 # usual reason for breakage: use dash or underline
214 $new =~ s/[-_]/[-_]/g;
215 $f=qx(find $basedir -iname $new) if ($new);
218 # Wild guess: seek for the same name on another place
220 $f = qx(find $basedir -iname $new) if ($new);
223 my @find = split /\s+/, $f;
226 print STDERR "ERROR: Didn't find a replacement for $ref\n";
227 } elsif (scalar(@find) > 1) {
228 print STDERR "WARNING: Won't auto-replace, as found multiple files close to $ref:\n";
229 foreach my $j (@find) {
231 print STDERR " $j\n";
236 print "INFO: Replacing $ref to $f\n";
237 foreach my $j (qx(git grep -l $ref)) {
238 qx(sed "s\@$ref\@$f\@g" -i $j);