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#!/usr/bin/env perl # SPDX-License-Identifier: GPL-2.0 use strict; use Pod::Usage; use Getopt::Long; use File::Find; use Fcntl ':mode'; my $help; my $man; my $debug; my $prefix="Documentation/ABI"; GetOptions( "debug\|d+" => \$debug, "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; # # Displays an error message, printing file name and line # sub parse_error($$$$) { my ($file, $ln, $msg, $data) = @_; print STDERR "file $file#$ln: $msg at\n\t$data"; } # # 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 $nametag = "File $name"; $data{$nametag}->{what} = "File $name"; $data{$nametag}->{type} = "File"; $data{$nametag}->{file} = $name; $data{$nametag}->{filepath} = $file; $data{$nametag}->{is_file} = 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/) { $space = ""; if ($tag =~ m/what/) { $what .= ", " . $content; } else { parse_error($file, $ln, "What '$what' doesn't have a description", "") if ($what && !$data{$what}->{description}); $what = $content; $label = $content; $new_what = 1; } push @labels, [($content, $label)]; $tag = $new_tag; push @{$data{$nametag}->{xrefs}}, [($content, $label)] if ($data{$nametag}->{what}); next; } if ($tag ne "" && $new_tag) { $tag = $new_tag; if ($new_what) { @{$data{$what}->{label}} = @labels if ($data{$nametag}->{what}); @labels = (); $label = ""; $new_what = 0; $data{$what}->{type} = $type; $data{$what}->{file} = $name; $data{$what}->{filepath} = $file; print STDERR "\twhat: $what\n" if ($debug > 1); } if (!$what) { parse_error($file, $ln, "'What:' should come first:", $_); next; } if ($tag eq "description") { next if ($content =~ m/^\s$/); if ($content =~ m/^(\s)(.)/) { my $new_content = $2; $space = $new_tag . $sep . $1; while ($space =~ s/\t+/' ' x (length($&) 8 - length($`) % 8)/e) {} $space =~ s/./ /g; $data{$what}->{$tag} .= "$new_content\n"; } } 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") { if (!$data{$what}->{description}) { next if (m/^\s\n/); if (m/^(\s)(.)/) { $space = $1; while ($space =~ s/\t+/' ' x (length($&) 8 - length($`) % 8)/e) {} $data{$what}->{$tag} .= "$2\n"; } } else { my $content = $_; if (m/^\s\n/) { $data{$what}->{$tag} .= $content; next; } while ($content =~ s/\t+/' ' x (length($&) 8 - length($`) % 8)/e) {} $space = "" if (!($content =~ s/^($space)//)); # Compress spaces with tabs $content =~ s<^ {8}> <\t>; $content =~ s<^ {1,7}\t> <\t>; $content =~ s< {1,7}\t> <\t>; $data{$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 line:", $_); } $data{$nametag}->{description} =~ s/^\n+//; close IN; } # # Outputs the book on ReST format # my %labels; sub output_rest { 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 = $data{$what}->{file}; my $filepath = $data{$what}->{filepath}; my $w = $what; $w =~ s/([\_\-\\=\^\~\\])/\\$1/g; foreach my $p (@{$data{$what}->{label}}) { my ($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; printf ".. _%s:\n\n", $label; # only one label is enough last; } $filepath =~ s,./(./.),\1,;; $filepath =~ s,[/\-],_,g;; my $fileref = "abi_file_".$filepath; if ($type eq "File") { my $bar = $w; $bar =~ s/./-/g; print ".. _$fileref:\n\n"; print "$w\n$bar\n\n"; } else { my @names = split /\s,\s/,$w; my $len = 0; foreach my $name (@names) { $len = length($name) if (length($name) > $len); } print "What:\n\n"; print "+-" . "-" x $len . "-+\n"; foreach my $name (@names) { printf "\| %s", $name . " " x ($len - length($name)) . " \|\n"; print "+-" . "-" x $len . "-+\n"; } print "\n"; } print "Defined on file :ref:`$file <$fileref>`\n\n" if ($type ne "File"); my $desc = $data{$what}->{description}; $desc =~ s/^\s+//; # Remove title markups from the description, as they won't work $desc =~ s/\n[\-\\=\^\~]+\n/\n/g; if (!($desc =~ /^\s$/)) { if ($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}->{xrefs}) { printf "Has the following ABI:\n\n"; foreach my $p(@{$data{$what}->{xrefs}}) { my ($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; $label =~ s,_$,,; # Escape special chars from content $content =~s/([\x00-\x1f\x21-\x2f\x3a-\x40\x7b-\xff])/\\$1/g; print "- :ref:`$content <$label>`\n\n"; } } } } # # 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}; my $contact = $data{$what}->{contact}; my $users = $data{$what}->{users}; my $date = $data{$what}->{date}; my $desc = $data{$what}->{description}; $kernelversion =~ s/^\s+//; $contact =~ s/^\s+//; $users =~ s/^\s+//; $users =~ s/\n//g; $date =~ s/^\s+//; $desc =~ s/^\s+//; 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:\t$file\n\n"; print "Description:\n\n$desc"; } } # # 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 ($cmd eq "rest") { output_rest; } elsif ($cmd eq "search") { search_symbols; } __END__ =head1 NAME abi_book.pl - parse the Linux ABI files and produce a ReST book. =head1 SYNOPSIS B<abi_book.pl> [--debug] [--man] [--help] [--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<--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

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