#!/usr/bin/env perl # SPDX-License-Identifier: GPL-2.0 use strict; use warnings; use utf8; use Pod::Usage; use Getopt::Long; use File::Find; use Fcntl ':mode'; my $help = 0; my $man = 0; my $debug = 0; my $enable_lineno = 0; my $prefix="Documentation/ABI"; # # If true, assumes that the description is formatted with ReST # my $description_is_rst = 1; GetOptions( "debug|d+" => \$debug, "enable-lineno" => \$enable_lineno, "rst-source!" => \$description_is_rst, "dir=s" => \$prefix, 'help|?' => \$help, man => \$man ) or pod2usage(2); pod2usage(1) if $help; pod2usage(-exitstatus => 0, -verbose => 2) if $man; pod2usage(2) if (scalar @ARGV < 1 || @ARGV > 2); my ($cmd, $arg) = @ARGV; pod2usage(2) if ($cmd ne "search" && $cmd ne "rest" && $cmd ne "validate"); pod2usage(2) if ($cmd eq "search" && !$arg); require Data::Dumper if ($debug); my %data; my %symbols; # # Displays an error message, printing file name and line # sub parse_error($$$$) { my ($file, $ln, $msg, $data) = @_; $data =~ s/\s+$/\n/; print STDERR "Warning: file $file#$ln:\n\t$msg"; if ($data ne "") { print STDERR ". Line\n\t\t$data"; } else { print STDERR "\n"; } } # # Parse an ABI file, storing its contents at %data # sub parse_abi { my $file = $File::Find::name; my $mode = (stat($file))[2]; return if ($mode & S_IFDIR); return if ($file =~ m,/README,); my $name = $file; $name =~ s,.*/,,; my $fn = $file; $fn =~ s,Documentation/ABI/,,; my $nametag = "File $fn"; $data{$nametag}->{what} = "File $name"; $data{$nametag}->{type} = "File"; $data{$nametag}->{file} = $name; $data{$nametag}->{filepath} = $file; $data{$nametag}->{is_file} = 1; $data{$nametag}->{line_no} = 1; my $type = $file; $type =~ s,.*/(.*)/.*,$1,; my $what; my $new_what; my $tag = ""; my $ln; my $xrefs; my $space; my @labels; my $label = ""; print STDERR "Opening $file\n" if ($debug > 1); open IN, $file; while(<IN>) { $ln++; if (m/^(\S+)(:\s*)(.*)/i) { my $new_tag = lc($1); my $sep = $2; my $content = $3; if (!($new_tag =~ m/(what|where|date|kernelversion|contact|description|users)/)) { if ($tag eq "description") { # New "tag" is actually part of # description. Don't consider it a tag $new_tag = ""; } elsif ($tag ne "") { parse_error($file, $ln, "tag '$tag' is invalid", $_); } } # Invalid, but it is a common mistake if ($new_tag eq "where") { parse_error($file, $ln, "tag 'Where' is invalid. Should be 'What:' instead", ""); $new_tag = "what"; } if ($new_tag =~ m/what/) { $space = ""; $content =~ s/[,.;]$//; push @{$symbols{$content}->{file}}, " $file:" . ($ln - 1); if ($tag =~ m/what/) { $what .= ", " . $content; } else { if ($what) { parse_error($file, $ln, "What '$what' doesn't have a description", "") if (!$data{$what}->{description}); foreach my $w(split /, /, $what) { $symbols{$w}->{xref} = $what; }; } $what = $content; $label = $content; $new_what = 1; } push @labels, [($content, $label)]; $tag = $new_tag; push @{$data{$nametag}->{symbols}}, $content if ($data{$nametag}->{what}); next; } if ($tag ne "" && $new_tag) { $tag = $new_tag; if ($new_what) { @{$data{$what}->{label_list}} = @labels if ($data{$nametag}->{what}); @labels = (); $label = ""; $new_what = 0; $data{$what}->{type} = $type; if (!defined($data{$what}->{file})) { $data{$what}->{file} = $name; $data{$what}->{filepath} = $file; } else { if ($name ne $data{$what}->{file}) { $data{$what}->{file} .= " " . $name; $data{$what}->{filepath} .= " " . $file; } } print STDERR "\twhat: $what\n" if ($debug > 1); $data{$what}->{line_no} = $ln; } else { $data{$what}->{line_no} = $ln if (!defined($data{$what}->{line_no})); } if (!$what) { parse_error($file, $ln, "'What:' should come first:", $_); next; } if ($new_tag eq "description") { $sep =~ s,:, ,; $content = ' ' x length($new_tag) . $sep . $content; while ($content =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {} if ($content =~ m/^(\s*)(\S.*)$/) { # Preserve initial spaces for the first line $space = $1; $content = "$2\n"; $data{$what}->{$tag} .= $content; } else { undef($space); } } else { $data{$what}->{$tag} = $content; } next; } } # Store any contents before tags at the database if (!$tag && $data{$nametag}->{what}) { $data{$nametag}->{description} .= $_; next; } if ($tag eq "description") { my $content = $_; while ($content =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {} if (m/^\s*\n/) { $data{$what}->{$tag} .= "\n"; next; } if (!defined($space)) { # Preserve initial spaces for the first line if ($content =~ m/^(\s*)(\S.*)$/) { $space = $1; $content = "$2\n"; } } else { $space = "" if (!($content =~ s/^($space)//)); } $data{$what}->{$tag} .= $content; next; } if (m/^\s*(.*)/) { $data{$what}->{$tag} .= "\n$1"; $data{$what}->{$tag} =~ s/\n+$//; next; } # Everything else is error parse_error($file, $ln, "Unexpected content", $_); } $data{$nametag}->{description} =~ s/^\n+// if ($data{$nametag}->{description}); if ($what) { parse_error($file, $ln, "What '$what' doesn't have a description", "") if (!$data{$what}->{description}); foreach my $w(split /, /,$what) { $symbols{$w}->{xref} = $what; }; } close IN; } sub create_labels { my %labels; foreach my $what (keys %data) { next if ($data{$what}->{file} eq "File"); foreach my $p (@{$data{$what}->{label_list}}) { my ($content, $label) = @{$p}; $label = "abi_" . $label . " "; $label =~ tr/A-Z/a-z/; # Convert special chars to "_" $label =~s/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\xff])/_/g; $label =~ s,_+,_,g; $label =~ s,_$,,; # Avoid duplicated labels while (defined($labels{$label})) { my @chars = ("A".."Z", "a".."z"); $label .= $chars[rand @chars]; } $labels{$label} = 1; $data{$what}->{label} = $label; # only one label is enough last; } } } # # Outputs the book on ReST format # # \b doesn't work well with paths. So, we need to define something else my $bondary = qr { (?<![\w\/\`\{])(?=[\w\/\`\{])|(?<=[\w\/\`\{])(?![\w\/\`\{]) }x; sub output_rest { create_labels(); my $part = ""; foreach my $what (sort { ($data{$a}->{type} eq "File") cmp ($data{$b}->{type} eq "File") || $a cmp $b } keys %data) { my $type = $data{$what}->{type}; my @file = split / /, $data{$what}->{file}; my @filepath = split / /, $data{$what}->{filepath}; if ($enable_lineno) { printf "#define LINENO %s%s#%s\n\n", $prefix, $file[0], $data{$what}->{line_no}; } my $w = $what; $w =~ s/([\(\)\_\-\*\=\^\~\\])/\\$1/g; if ($type ne "File") { my $cur_part = $what; if ($what =~ '/') { if ($what =~ m#^(\/?(?:[\w\-]+\/?){1,2})#) { $cur_part = "Symbols under $1"; $cur_part =~ s,/$,,; } } if ($cur_part ne "" && $part ne $cur_part) { $part = $cur_part; my $bar = $part; $bar =~ s/./-/g; print "$part\n$bar\n\n"; } printf ".. _%s:\n\n", $data{$what}->{label}; my @names = split /, /,$w; my $len = 0; foreach my $name (@names) { $name = "**$name**"; $len = length($name) if (length($name) > $len); } print "+-" . "-" x $len . "-+\n"; foreach my $name (@names) { printf "| %s", $name . " " x ($len - length($name)) . " |\n"; print "+-" . "-" x $len . "-+\n"; } print "\n"; } for (my $i = 0; $i < scalar(@filepath); $i++) { my $path = $filepath[$i]; my $f = $file[$i]; $path =~ s,.*/(.*/.*),$1,;; $path =~ s,[/\-],_,g;; my $fileref = "abi_file_".$path; if ($type eq "File") { print ".. _$fileref:\n\n"; } else { print "Defined on file :ref:`$f <$fileref>`\n\n"; } } if ($type eq "File") { my $bar = $w; $bar =~ s/./-/g; print "$w\n$bar\n\n"; } my $desc = ""; $desc = $data{$what}->{description} if (defined($data{$what}->{description})); $desc =~ s/\s+$/\n/; if (!($desc =~ /^\s*$/)) { if ($description_is_rst) { # Remove title markups from the description # Having titles inside ABI files will only work if extra # care would be taken in order to strictly follow the same # level order for each markup. $desc =~ s/\n[\-\*\=\^\~]+\n/\n\n/g; # Enrich text by creating cross-references $desc =~ s,Documentation/(?!devicetree)(\S+)\.rst,:doc:`/$1`,g; my @matches = $desc =~ m,Documentation/ABI/([\w\/\-]+),; foreach my $f (@matches) { my $xref = $f; my $path = $f; $path =~ s,.*/(.*/.*),$1,;; $path =~ s,[/\-],_,g;; $xref .= " <abi_file_" . $path . ">"; $desc =~ s,\bDocumentation/ABI/$f\b,:ref:`$xref`,g; } @matches = $desc =~ m,$bondary(/sys/[^\s\.\,\;\:\*\s\`\'\(\)]+)$bondary,; foreach my $s (@matches) { if (defined($data{$s}) && defined($data{$s}->{label})) { my $xref = $s; $xref =~ s/([\x00-\x1f\x21-\x2f\x3a-\x40\x7b-\xff])/\\$1/g; $xref = ":ref:`$xref <" . $data{$s}->{label} . ">`"; $desc =~ s,$bondary$s$bondary,$xref,g; } } print "$desc\n\n"; } else { $desc =~ s/^\s+//; # Remove title markups from the description, as they won't work $desc =~ s/\n[\-\*\=\^\~]+\n/\n\n/g; if ($desc =~ m/\:\n/ || $desc =~ m/\n[\t ]+/ || $desc =~ m/[\x00-\x08\x0b-\x1f\x7b-\xff]/) { # put everything inside a code block $desc =~ s/\n/\n /g; print "::\n\n"; print " $desc\n\n"; } else { # Escape any special chars from description $desc =~s/([\x00-\x08\x0b-\x1f\x21-\x2a\x2d\x2f\x3c-\x40\x5c\x5e-\x60\x7b-\xff])/\\$1/g; print "$desc\n\n"; } } } else { print "DESCRIPTION MISSING for $what\n\n" if (!$data{$what}->{is_file}); } if ($data{$what}->{symbols}) { printf "Has the following ABI:\n\n"; foreach my $content(@{$data{$what}->{symbols}}) { my $label = $data{$symbols{$content}->{xref}}->{label}; # Escape special chars from content $content =~s/([\x00-\x1f\x21-\x2f\x3a-\x40\x7b-\xff])/\\$1/g; print "- :ref:`$content <$label>`\n\n"; } } if (defined($data{$what}->{users})) { my $users = $data{$what}->{users}; $users =~ s/\n/\n\t/g; printf "Users:\n\t%s\n\n", $users if ($users ne ""); } } } # # Searches for ABI symbols # sub search_symbols { foreach my $what (sort keys %data) { next if (!($what =~ m/($arg)/)); my $type = $data{$what}->{type}; next if ($type eq "File"); my $file = $data{$what}->{filepath}; my $bar = $what; $bar =~ s/./-/g; print "\n$what\n$bar\n\n"; my $kernelversion = $data{$what}->{kernelversion} if (defined($data{$what}->{kernelversion})); my $contact = $data{$what}->{contact} if (defined($data{$what}->{contact})); my $users = $data{$what}->{users} if (defined($data{$what}->{users})); my $date = $data{$what}->{date} if (defined($data{$what}->{date})); my $desc = $data{$what}->{description} if (defined($data{$what}->{description})); $kernelversion =~ s/^\s+// if ($kernelversion); $contact =~ s/^\s+// if ($contact); if ($users) { $users =~ s/^\s+//; $users =~ s/\n//g; } $date =~ s/^\s+// if ($date); $desc =~ s/^\s+// if ($desc); printf "Kernel version:\t\t%s\n", $kernelversion if ($kernelversion); 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