mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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c27c2e3441
Change the description parsing logic in rst mode in order to parse it line per line. The end result is the same, but doing line per line allows to add some code to escape literal blocks when seeking for cross-references. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/d33cfa2e59ecf8f28d4ed7de7402468cf2168921.1616668017.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
641 lines
15 KiB
Perl
Executable file
641 lines
15 KiB
Perl
Executable file
#!/usr/bin/env perl
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# SPDX-License-Identifier: GPL-2.0
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use strict;
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use warnings;
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use utf8;
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use Pod::Usage;
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use Getopt::Long;
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use File::Find;
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use Fcntl ':mode';
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my $help = 0;
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my $man = 0;
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my $debug = 0;
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my $enable_lineno = 0;
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my $prefix="Documentation/ABI";
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#
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# If true, assumes that the description is formatted with ReST
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#
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my $description_is_rst = 1;
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GetOptions(
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"debug|d+" => \$debug,
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"enable-lineno" => \$enable_lineno,
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"rst-source!" => \$description_is_rst,
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"dir=s" => \$prefix,
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'help|?' => \$help,
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man => \$man
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) or pod2usage(2);
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pod2usage(1) if $help;
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pod2usage(-exitstatus => 0, -verbose => 2) if $man;
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pod2usage(2) if (scalar @ARGV < 1 || @ARGV > 2);
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my ($cmd, $arg) = @ARGV;
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pod2usage(2) if ($cmd ne "search" && $cmd ne "rest" && $cmd ne "validate");
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pod2usage(2) if ($cmd eq "search" && !$arg);
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require Data::Dumper if ($debug);
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my %data;
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my %symbols;
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#
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# Displays an error message, printing file name and line
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#
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sub parse_error($$$$) {
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my ($file, $ln, $msg, $data) = @_;
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$data =~ s/\s+$/\n/;
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print STDERR "Warning: file $file#$ln:\n\t$msg";
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if ($data ne "") {
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print STDERR ". Line\n\t\t$data";
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} else {
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print STDERR "\n";
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}
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}
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#
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# Parse an ABI file, storing its contents at %data
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#
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sub parse_abi {
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my $file = $File::Find::name;
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my $mode = (stat($file))[2];
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return if ($mode & S_IFDIR);
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return if ($file =~ m,/README,);
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my $name = $file;
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$name =~ s,.*/,,;
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my $fn = $file;
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$fn =~ s,Documentation/ABI/,,;
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my $nametag = "File $fn";
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$data{$nametag}->{what} = "File $name";
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$data{$nametag}->{type} = "File";
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$data{$nametag}->{file} = $name;
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$data{$nametag}->{filepath} = $file;
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$data{$nametag}->{is_file} = 1;
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$data{$nametag}->{line_no} = 1;
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my $type = $file;
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$type =~ s,.*/(.*)/.*,$1,;
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my $what;
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my $new_what;
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my $tag = "";
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my $ln;
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my $xrefs;
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my $space;
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my @labels;
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my $label = "";
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print STDERR "Opening $file\n" if ($debug > 1);
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open IN, $file;
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while(<IN>) {
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$ln++;
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if (m/^(\S+)(:\s*)(.*)/i) {
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my $new_tag = lc($1);
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my $sep = $2;
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my $content = $3;
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if (!($new_tag =~ m/(what|where|date|kernelversion|contact|description|users)/)) {
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if ($tag eq "description") {
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# New "tag" is actually part of
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# description. Don't consider it a tag
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$new_tag = "";
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} elsif ($tag ne "") {
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parse_error($file, $ln, "tag '$tag' is invalid", $_);
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}
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}
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# Invalid, but it is a common mistake
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if ($new_tag eq "where") {
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parse_error($file, $ln, "tag 'Where' is invalid. Should be 'What:' instead", "");
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$new_tag = "what";
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}
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if ($new_tag =~ m/what/) {
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$space = "";
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$content =~ s/[,.;]$//;
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push @{$symbols{$content}->{file}}, " $file:" . ($ln - 1);
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if ($tag =~ m/what/) {
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$what .= ", " . $content;
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} else {
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if ($what) {
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parse_error($file, $ln, "What '$what' doesn't have a description", "") if (!$data{$what}->{description});
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foreach my $w(split /, /, $what) {
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$symbols{$w}->{xref} = $what;
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};
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}
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$what = $content;
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$label = $content;
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$new_what = 1;
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}
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push @labels, [($content, $label)];
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$tag = $new_tag;
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push @{$data{$nametag}->{symbols}}, $content if ($data{$nametag}->{what});
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next;
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}
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if ($tag ne "" && $new_tag) {
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$tag = $new_tag;
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if ($new_what) {
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@{$data{$what}->{label_list}} = @labels if ($data{$nametag}->{what});
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@labels = ();
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$label = "";
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$new_what = 0;
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$data{$what}->{type} = $type;
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if (!defined($data{$what}->{file})) {
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$data{$what}->{file} = $name;
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$data{$what}->{filepath} = $file;
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} else {
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if ($name ne $data{$what}->{file}) {
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$data{$what}->{file} .= " " . $name;
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$data{$what}->{filepath} .= " " . $file;
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}
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}
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print STDERR "\twhat: $what\n" if ($debug > 1);
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$data{$what}->{line_no} = $ln;
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} else {
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$data{$what}->{line_no} = $ln if (!defined($data{$what}->{line_no}));
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}
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if (!$what) {
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parse_error($file, $ln, "'What:' should come first:", $_);
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next;
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}
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if ($new_tag eq "description") {
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$sep =~ s,:, ,;
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$content = ' ' x length($new_tag) . $sep . $content;
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while ($content =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {}
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if ($content =~ m/^(\s*)(\S.*)$/) {
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# Preserve initial spaces for the first line
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$space = $1;
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$content = "$2\n";
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$data{$what}->{$tag} .= $content;
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} else {
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undef($space);
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}
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} else {
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$data{$what}->{$tag} = $content;
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}
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next;
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}
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}
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# Store any contents before tags at the database
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if (!$tag && $data{$nametag}->{what}) {
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$data{$nametag}->{description} .= $_;
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next;
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}
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if ($tag eq "description") {
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my $content = $_;
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while ($content =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {}
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if (m/^\s*\n/) {
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$data{$what}->{$tag} .= "\n";
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next;
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}
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if (!defined($space)) {
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# Preserve initial spaces for the first line
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if ($content =~ m/^(\s*)(\S.*)$/) {
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$space = $1;
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$content = "$2\n";
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}
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} else {
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$space = "" if (!($content =~ s/^($space)//));
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}
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$data{$what}->{$tag} .= $content;
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next;
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}
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if (m/^\s*(.*)/) {
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$data{$what}->{$tag} .= "\n$1";
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$data{$what}->{$tag} =~ s/\n+$//;
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next;
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}
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# Everything else is error
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parse_error($file, $ln, "Unexpected content", $_);
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}
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$data{$nametag}->{description} =~ s/^\n+// if ($data{$nametag}->{description});
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if ($what) {
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parse_error($file, $ln, "What '$what' doesn't have a description", "") if (!$data{$what}->{description});
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foreach my $w(split /, /,$what) {
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$symbols{$w}->{xref} = $what;
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};
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}
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close IN;
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}
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sub create_labels {
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my %labels;
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foreach my $what (keys %data) {
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next if ($data{$what}->{file} eq "File");
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foreach my $p (@{$data{$what}->{label_list}}) {
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my ($content, $label) = @{$p};
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$label = "abi_" . $label . " ";
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$label =~ tr/A-Z/a-z/;
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# Convert special chars to "_"
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$label =~s/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\xff])/_/g;
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$label =~ s,_+,_,g;
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$label =~ s,_$,,;
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# Avoid duplicated labels
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while (defined($labels{$label})) {
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my @chars = ("A".."Z", "a".."z");
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$label .= $chars[rand @chars];
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}
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$labels{$label} = 1;
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$data{$what}->{label} = $label;
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# only one label is enough
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last;
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}
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}
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}
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#
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# Outputs the book on ReST format
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#
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# \b doesn't work well with paths. So, we need to define something else:
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# Boundaries are punct characters, spaces and end-of-line
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my $start = qr {(^|\s|\() }x;
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my $bondary = qr { ([,.:;\)\s]|\z) }x;
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my $xref_match = qr { $start(\/(sys|config|proc|dev|kvd)\/[^,.:;\)\s]+)$bondary }x;
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my $symbols = qr { ([\x01-\x08\x0e-\x1f\x21-\x2f\x3a-\x40\x7b-\xff]) }x;
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sub output_rest {
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create_labels();
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my $part = "";
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foreach my $what (sort {
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($data{$a}->{type} eq "File") cmp ($data{$b}->{type} eq "File") ||
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$a cmp $b
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} keys %data) {
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my $type = $data{$what}->{type};
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my @file = split / /, $data{$what}->{file};
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my @filepath = split / /, $data{$what}->{filepath};
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if ($enable_lineno) {
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printf "#define LINENO %s%s#%s\n\n",
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$prefix, $file[0],
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$data{$what}->{line_no};
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}
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my $w = $what;
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if ($type ne "File") {
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my $cur_part = $what;
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if ($what =~ '/') {
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if ($what =~ m#^(\/?(?:[\w\-]+\/?){1,2})#) {
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$cur_part = "Symbols under $1";
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$cur_part =~ s,/$,,;
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}
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}
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if ($cur_part ne "" && $part ne $cur_part) {
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$part = $cur_part;
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my $bar = $part;
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$bar =~ s/./-/g;
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print "$part\n$bar\n\n";
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}
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printf ".. _%s:\n\n", $data{$what}->{label};
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my @names = split /, /,$w;
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my $len = 0;
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foreach my $name (@names) {
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$name =~ s/$symbols/\\$1/g;
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$name = "**$name**";
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$len = length($name) if (length($name) > $len);
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}
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print "+-" . "-" x $len . "-+\n";
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foreach my $name (@names) {
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printf "| %s", $name . " " x ($len - length($name)) . " |\n";
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print "+-" . "-" x $len . "-+\n";
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}
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print "\n";
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}
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for (my $i = 0; $i < scalar(@filepath); $i++) {
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my $path = $filepath[$i];
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my $f = $file[$i];
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$path =~ s,.*/(.*/.*),$1,;;
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$path =~ s,[/\-],_,g;;
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my $fileref = "abi_file_".$path;
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if ($type eq "File") {
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print ".. _$fileref:\n\n";
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} else {
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print "Defined on file :ref:`$f <$fileref>`\n\n";
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}
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}
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if ($type eq "File") {
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my $bar = $w;
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$bar =~ s/./-/g;
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print "$w\n$bar\n\n";
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}
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my $desc = "";
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$desc = $data{$what}->{description} if (defined($data{$what}->{description}));
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$desc =~ s/\s+$/\n/;
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if (!($desc =~ /^\s*$/)) {
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if ($description_is_rst) {
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# Remove title markups from the description
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# Having titles inside ABI files will only work if extra
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# care would be taken in order to strictly follow the same
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# level order for each markup.
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$desc =~ s/\n[\-\*\=\^\~]+\n/\n\n/g;
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# Enrich text by creating cross-references
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my $new_desc = "";
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open(my $fh, "+<", \$desc);
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while (my $d = <$fh>) {
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$d =~ s,Documentation/(?!devicetree)(\S+)\.rst,:doc:`/$1`,g;
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my @matches = $d =~ m,Documentation/ABI/([\w\/\-]+),g;
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foreach my $f (@matches) {
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my $xref = $f;
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my $path = $f;
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$path =~ s,.*/(.*/.*),$1,;;
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$path =~ s,[/\-],_,g;;
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$xref .= " <abi_file_" . $path . ">";
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$d =~ s,\bDocumentation/ABI/$f\b,:ref:`$xref`,g;
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}
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# Seek for cross reference symbols like /sys/...
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@matches = $d =~ m/$xref_match/g;
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foreach my $s (@matches) {
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next if (!($s =~ m,/,));
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if (defined($data{$s}) && defined($data{$s}->{label})) {
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my $xref = $s;
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$xref =~ s/$symbols/\\$1/g;
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$xref = ":ref:`$xref <" . $data{$s}->{label} . ">`";
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$d =~ s,$start$s$bondary,$1$xref$2,g;
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}
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}
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$new_desc .= $d;
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}
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close $fh;
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print "$new_desc\n\n";
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} else {
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$desc =~ s/^\s+//;
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# Remove title markups from the description, as they won't work
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$desc =~ s/\n[\-\*\=\^\~]+\n/\n\n/g;
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if ($desc =~ m/\:\n/ || $desc =~ m/\n[\t ]+/ || $desc =~ m/[\x00-\x08\x0b-\x1f\x7b-\xff]/) {
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# put everything inside a code block
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$desc =~ s/\n/\n /g;
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print "::\n\n";
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print " $desc\n\n";
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} else {
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# Escape any special chars from description
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$desc =~s/([\x00-\x08\x0b-\x1f\x21-\x2a\x2d\x2f\x3c-\x40\x5c\x5e-\x60\x7b-\xff])/\\$1/g;
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print "$desc\n\n";
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}
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}
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} else {
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print "DESCRIPTION MISSING for $what\n\n" if (!$data{$what}->{is_file});
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}
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if ($data{$what}->{symbols}) {
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printf "Has the following ABI:\n\n";
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foreach my $content(@{$data{$what}->{symbols}}) {
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my $label = $data{$symbols{$content}->{xref}}->{label};
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# Escape special chars from content
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$content =~s/([\x00-\x1f\x21-\x2f\x3a-\x40\x7b-\xff])/\\$1/g;
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print "- :ref:`$content <$label>`\n\n";
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}
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}
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if (defined($data{$what}->{users})) {
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my $users = $data{$what}->{users};
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$users =~ s/\n/\n\t/g;
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printf "Users:\n\t%s\n\n", $users if ($users ne "");
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}
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}
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}
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#
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# Searches for ABI symbols
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#
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sub search_symbols {
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foreach my $what (sort keys %data) {
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next if (!($what =~ m/($arg)/));
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my $type = $data{$what}->{type};
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next if ($type eq "File");
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my $file = $data{$what}->{filepath};
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my $bar = $what;
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$bar =~ s/./-/g;
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print "\n$what\n$bar\n\n";
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my $kernelversion = $data{$what}->{kernelversion} if (defined($data{$what}->{kernelversion}));
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my $contact = $data{$what}->{contact} if (defined($data{$what}->{contact}));
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my $users = $data{$what}->{users} if (defined($data{$what}->{users}));
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my $date = $data{$what}->{date} if (defined($data{$what}->{date}));
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my $desc = $data{$what}->{description} if (defined($data{$what}->{description}));
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$kernelversion =~ s/^\s+// if ($kernelversion);
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$contact =~ s/^\s+// if ($contact);
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if ($users) {
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$users =~ s/^\s+//;
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$users =~ s/\n//g;
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}
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$date =~ s/^\s+// if ($date);
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$desc =~ s/^\s+// if ($desc);
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printf "Kernel version:\t\t%s\n", $kernelversion if ($kernelversion);
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printf "Date:\t\t\t%s\n", $date if ($date);
|
|
printf "Contact:\t\t%s\n", $contact if ($contact);
|
|
printf "Users:\t\t\t%s\n", $users if ($users);
|
|
print "Defined on file(s):\t$file\n\n";
|
|
print "Description:\n\n$desc";
|
|
}
|
|
}
|
|
|
|
# Ensure that the prefix will always end with a slash
|
|
# While this is not needed for find, it makes the patch nicer
|
|
# with --enable-lineno
|
|
$prefix =~ s,/?$,/,;
|
|
|
|
#
|
|
# Parses all ABI files located at $prefix dir
|
|
#
|
|
find({wanted =>\&parse_abi, no_chdir => 1}, $prefix);
|
|
|
|
print STDERR Data::Dumper->Dump([\%data], [qw(*data)]) if ($debug);
|
|
|
|
#
|
|
# Handles the command
|
|
#
|
|
if ($cmd eq "search") {
|
|
search_symbols;
|
|
} else {
|
|
if ($cmd eq "rest") {
|
|
output_rest;
|
|
}
|
|
|
|
# Warn about duplicated ABI entries
|
|
foreach my $what(sort keys %symbols) {
|
|
my @files = @{$symbols{$what}->{file}};
|
|
|
|
next if (scalar(@files) == 1);
|
|
|
|
printf STDERR "Warning: $what is defined %d times: @files\n",
|
|
scalar(@files);
|
|
}
|
|
}
|
|
|
|
__END__
|
|
|
|
=head1 NAME
|
|
|
|
abi_book.pl - parse the Linux ABI files and produce a ReST book.
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
B<abi_book.pl> [--debug] [--enable-lineno] [--man] [--help]
|
|
[--(no-)rst-source] [--dir=<dir>] <COMAND> [<ARGUMENT>]
|
|
|
|
Where <COMMAND> can be:
|
|
|
|
=over 8
|
|
|
|
B<search> [SEARCH_REGEX] - search for [SEARCH_REGEX] inside ABI
|
|
|
|
B<rest> - output the ABI in ReST markup language
|
|
|
|
B<validate> - validate the ABI contents
|
|
|
|
=back
|
|
|
|
=head1 OPTIONS
|
|
|
|
=over 8
|
|
|
|
=item B<--dir>
|
|
|
|
Changes the location of the ABI search. By default, it uses
|
|
the Documentation/ABI directory.
|
|
|
|
=item B<--rst-source> and B<--no-rst-source>
|
|
|
|
The input file may be using ReST syntax or not. Those two options allow
|
|
selecting between a rst-compliant source ABI (--rst-source), or a
|
|
plain text that may be violating ReST spec, so it requres some escaping
|
|
logic (--no-rst-source).
|
|
|
|
=item B<--enable-lineno>
|
|
|
|
Enable output of #define LINENO lines.
|
|
|
|
=item B<--debug>
|
|
|
|
Put the script in verbose mode, useful for debugging. Can be called multiple
|
|
times, to increase verbosity.
|
|
|
|
=item B<--help>
|
|
|
|
Prints a brief help message and exits.
|
|
|
|
=item B<--man>
|
|
|
|
Prints the manual page and exits.
|
|
|
|
=back
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
Parse the Linux ABI files from ABI DIR (usually located at Documentation/ABI),
|
|
allowing to search for ABI symbols or to produce a ReST book containing
|
|
the Linux ABI documentation.
|
|
|
|
=head1 EXAMPLES
|
|
|
|
Search for all stable symbols with the word "usb":
|
|
|
|
=over 8
|
|
|
|
$ scripts/get_abi.pl search usb --dir Documentation/ABI/stable
|
|
|
|
=back
|
|
|
|
Search for all symbols that match the regex expression "usb.*cap":
|
|
|
|
=over 8
|
|
|
|
$ scripts/get_abi.pl search usb.*cap
|
|
|
|
=back
|
|
|
|
Output all obsoleted symbols in ReST format
|
|
|
|
=over 8
|
|
|
|
$ scripts/get_abi.pl rest --dir Documentation/ABI/obsolete
|
|
|
|
=back
|
|
|
|
=head1 BUGS
|
|
|
|
Report bugs to Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
|
|
|
|
=head1 COPYRIGHT
|
|
|
|
Copyright (c) 2016-2019 by Mauro Carvalho Chehab <mchehab+samsung@kernel.org>.
|
|
|
|
License GPLv2: GNU GPL version 2 <http://gnu.org/licenses/gpl.html>.
|
|
|
|
This is free software: you are free to change and redistribute it.
|
|
There is NO WARRANTY, to the extent permitted by law.
|
|
|
|
=cut
|