469 lines
10 KiB
Perl
Executable File
469 lines
10 KiB
Perl
Executable File
#!/usr/bin/perl
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# SPDX-License-Identifier: GPL-2.0
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use strict;
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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;
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my $man;
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my $debug;
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my $prefix="Documentation/ABI";
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GetOptions(
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"debug|d+" => \$debug,
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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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#
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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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print STDERR "file $file#$ln: $msg at\n\t$data";
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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 $nametag = "File $name";
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$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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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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if ($tag =~ m/what/) {
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$what .= ", " . $content;
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} else {
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parse_error($file, $ln, "What '$what' doesn't have a description", "") if ($what && !$data{$what}->{description});
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$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{$nametag}->{xrefs}}, [($content, $label)] if ($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}} = @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} = $type;
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$data{$what}->{file} = $name;
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$data{$what}->{filepath} = $file;
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print STDERR "\twhat: $what\n" if ($debug > 1);
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}
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if (!$what) {
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parse_error($file, $ln, "'What:' should come first:", $_);
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next;
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}
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if ($tag eq "description") {
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next if ($content =~ m/^\s*$/);
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if ($content =~ m/^(\s*)(.*)/) {
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my $new_content = $2;
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$space = $new_tag . $sep . $1;
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while ($space =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {}
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$space =~ s/./ /g;
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$data{$what}->{$tag} .= "$new_content\n";
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}
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} else {
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$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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if (!$data{$what}->{description}) {
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next if (m/^\s*\n/);
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if (m/^(\s*)(.*)/) {
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$space = $1;
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while ($space =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {}
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$data{$what}->{$tag} .= "$2\n";
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}
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} else {
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my $content = $_;
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if (m/^\s*\n/) {
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$data{$what}->{$tag} .= $content;
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next;
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}
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while ($content =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {}
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$space = "" if (!($content =~ s/^($space)//));
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# Compress spaces with tabs
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$content =~ s<^ {8}> <\t>;
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$content =~ s<^ {1,7}\t> <\t>;
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$content =~ s< {1,7}\t> <\t>;
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$data{$what}->{$tag} .= $content;
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}
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next;
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}
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if (m/^\s*(.*)/) {
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$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 line:", $_);
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}
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$data{$nametag}->{description} =~ s/^\n+//;
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close IN;
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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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my %labels;
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sub output_rest {
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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 = $data{$what}->{file};
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my $filepath = $data{$what}->{filepath};
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my $w = $what;
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$w =~ s/([\(\)\_\-\*\=\^\~\\])/\\$1/g;
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foreach my $p (@{$data{$what}->{label}}) {
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my ($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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printf ".. _%s:\n\n", $label;
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# only one label is enough
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last;
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}
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$filepath =~ s,.*/(.*/.*),\1,;;
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$filepath =~ s,[/\-],_,g;;
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my $fileref = "abi_file_".$filepath;
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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 ".. _$fileref:\n\n";
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print "$w\n$bar\n\n";
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} else {
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my @names = split /\s*,\s*/,$w;
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my $len = 0;
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foreach my $name (@names) {
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$len = length($name) if (length($name) > $len);
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}
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print "What:\n\n";
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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 $len . "-+\n";
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}
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print "\n";
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}
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print "Defined on file :ref:`$file <$fileref>`\n\n" if ($type ne "File");
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my $desc = $data{$what}->{description};
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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/g;
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if (!($desc =~ /^\s*$/)) {
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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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} 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}->{xrefs}) {
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printf "Has the following ABI:\n\n";
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foreach my $p(@{$data{$what}->{xrefs}}) {
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my ($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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# 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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}
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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};
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my $contact = $data{$what}->{contact};
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my $users = $data{$what}->{users};
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my $date = $data{$what}->{date};
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my $desc = $data{$what}->{description};
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$kernelversion =~ s/^\s+//;
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$contact =~ s/^\s+//;
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$users =~ s/^\s+//;
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$users =~ s/\n//g;
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$date =~ s/^\s+//;
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$desc =~ s/^\s+//;
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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);
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printf "Contact:\t\t%s\n", $contact if ($contact);
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printf "Users:\t\t\t%s\n", $users if ($users);
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print "Defined on file:\t$file\n\n";
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print "Description:\n\n$desc";
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}
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}
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#
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# Parses all ABI files located at $prefix dir
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#
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find({wanted =>\&parse_abi, no_chdir => 1}, $prefix);
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print STDERR Data::Dumper->Dump([\%data], [qw(*data)]) if ($debug);
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#
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# Handles the command
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#
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if ($cmd eq "rest") {
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output_rest;
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} elsif ($cmd eq "search") {
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search_symbols;
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}
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__END__
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=head1 NAME
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abi_book.pl - parse the Linux ABI files and produce a ReST book.
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=head1 SYNOPSIS
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B<abi_book.pl> [--debug] [--man] [--help] [--dir=<dir>] <COMAND> [<ARGUMENT>]
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Where <COMMAND> can be:
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=over 8
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B<search> [SEARCH_REGEX] - search for [SEARCH_REGEX] inside ABI
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B<rest> - output the ABI in ReST markup language
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B<validate> - validate the ABI contents
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=back
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=head1 OPTIONS
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=over 8
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=item B<--dir>
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Changes the location of the ABI search. By default, it uses
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the Documentation/ABI directory.
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=item B<--debug>
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Put the script in verbose mode, useful for debugging. Can be called multiple
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times, to increase verbosity.
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=item B<--help>
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Prints a brief help message and exits.
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=item B<--man>
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Prints the manual page and exits.
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=back
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=head1 DESCRIPTION
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Parse the Linux ABI files from ABI DIR (usually located at Documentation/ABI),
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allowing to search for ABI symbols or to produce a ReST book containing
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the Linux ABI documentation.
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=head1 EXAMPLES
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Search for all stable symbols with the word "usb":
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=over 8
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$ scripts/get_abi.pl search usb --dir Documentation/ABI/stable
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=back
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Search for all symbols that match the regex expression "usb.*cap":
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=over 8
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$ scripts/get_abi.pl search usb.*cap
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=back
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Output all obsoleted symbols in ReST format
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=over 8
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$ scripts/get_abi.pl rest --dir Documentation/ABI/obsolete
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=back
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=head1 BUGS
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Report bugs to Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
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=head1 COPYRIGHT
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Copyright (c) 2016-2019 by Mauro Carvalho Chehab <mchehab+samsung@kernel.org>.
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License GPLv2: GNU GPL version 2 <http://gnu.org/licenses/gpl.html>.
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This is free software: you are free to change and redistribute it.
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There is NO WARRANTY, to the extent permitted by law.
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=cut
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