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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'; use Cwd 'abs_path'; my $help; my $man; my $debug; my $arch; my $feat; my $enable_fname; my $basename = abs_path($0); $basename =~ s,/[^/]+$,/,; my $prefix=$basename . "../Documentation/features"; # Used only at for full features output. The script will auto-adjust # such values for the minimal possible values my $status_size = 1; my $description_size = 1; GetOptions( "debug|d+" => \$debug, "dir=s" => \$prefix, 'help|?' => \$help, 'arch=s' => \$arch, 'feat=s' => \$feat, 'feature=s' => \$feat, "enable-fname" => \$enable_fname, man => \$man ) or pod2usage(2); pod2usage(1) if $help; pod2usage(-exitstatus => 0, -verbose => 2) if $man; pod2usage(1) if (scalar @ARGV < 1 || @ARGV > 2); my ($cmd, $arg) = @ARGV; pod2usage(2) if ($cmd ne "current" && $cmd ne "rest" && $cmd ne "validate" && $cmd ne "ls" && $cmd ne "list"); require Data::Dumper if ($debug); my %data; my %archs; # # 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 a features file, storing its contents at %data # my $h_name = "Feature"; my $h_kconfig = "Kconfig"; my $h_description = "Description"; my $h_subsys = "Subsystem"; my $h_status = "Status"; my $h_arch = "Architecture"; my $max_size_name = length($h_name); my $max_size_kconfig = length($h_kconfig); my $max_size_description = length($h_description); my $max_size_subsys = length($h_subsys); my $max_size_status = length($h_status); my $max_size_arch = 0; my $max_size_arch_with_header; my $max_description_word = 0; sub parse_feat { my $file = $File::Find::name; my $mode = (stat($file))[2]; return if ($mode & S_IFDIR); return if ($file =~ m,($prefix)/arch-support.txt,); return if (!($file =~ m,arch-support.txt$,)); if ($enable_fname) { printf ".. FILE %s\n", abs_path($file); } my $subsys = ""; $subsys = $2 if ( m,.*($prefix)/([^/]+).*,); if (length($subsys) > $max_size_subsys) { $max_size_subsys = length($subsys); } my $name; my $kconfig; my $description; my $comments = ""; my $last_status; my $ln; my %arch_table; print STDERR "Opening $file\n" if ($debug > 1); open IN, $file; while(<IN>) { $ln++; if (m/^\#\s+Feature\s+name:\s*(.*\S)/) { $name = $1; if (length($name) > $max_size_name) { $max_size_name = length($name); } next; } if (m/^\#\s+Kconfig:\s*(.*\S)/) { $kconfig = $1; if (length($kconfig) > $max_size_kconfig) { $max_size_kconfig = length($kconfig); } next; } if (m/^\#\s+description:\s*(.*\S)/) { $description = $1; if (length($description) > $max_size_description) { $max_size_description = length($description); } foreach my $word (split /\s+/, $description) { if (length($word) > $max_description_word) { $max_description_word = length($word); } } next; } next if (m/^\\s*$/); next if (m/^\s*\-+\s*$/); next if (m/^\s*\|\s*arch\s*\|\s*status\s*\|\s*$/); if (m/^\#\s*(.*)/) { $comments .= "$1\n"; next; } if (m/^\s*\|\s*(\S+):\s*\|\s*(\S+)\s*\|\s*$/) { my $a = $1; my $status = $2; if (length($status) > $max_size_status) { $max_size_status = length($status); } if (length($a) > $max_size_arch) { $max_size_arch = length($a); } $status = "---" if ($status =~ m/^\.\.$/); $archs{$a} = 1; $arch_table{$a} = $status; next; } #Everything else is an error parse_error($file, $ln, "line is invalid", $_); } close IN; if (!$name) { parse_error($file, $ln, "Feature name not found", ""); return; } parse_error($file, $ln, "Subsystem not found", "") if (!$subsys); parse_error($file, $ln, "Kconfig not found", "") if (!$kconfig); parse_error($file, $ln, "Description not found", "") if (!$description); if (!%arch_table) { parse_error($file, $ln, "Architecture table not found", ""); return; } $data{$name}->{where} = $file; $data{$name}->{subsys} = $subsys; $data{$name}->{kconfig} = $kconfig; $data{$name}->{description} = $description; $data{$name}->{comments} = $comments; $data{$name}->{table} = \%arch_table; $max_size_arch_with_header = $max_size_arch + length($h_arch); } # # Output feature(s) for a given architecture # sub output_arch_table { my $title = "Feature status on $arch architecture"; print "=" x length($title) . "\n"; print "$title\n"; print "=" x length($title) . "\n\n"; print "=" x $max_size_subsys; print " "; print "=" x $max_size_name; print " "; print "=" x $max_size_kconfig; print " "; print "=" x $max_size_status; print " "; print "=" x $max_size_description; print "\n"; printf "%-${max_size_subsys}s ", $h_subsys; printf "%-${max_size_name}s ", $h_name; printf "%-${max_size_kconfig}s ", $h_kconfig; printf "%-${max_size_status}s ", $h_status; printf "%-${max_size_description}s\n", $h_description; print "=" x $max_size_subsys; print " "; print "=" x $max_size_name; print " "; print "=" x $max_size_kconfig; print " "; print "=" x $max_size_status; print " "; print "=" x $max_size_description; print "\n"; foreach my $name (sort { ($data{$a}->{subsys} cmp $data{$b}->{subsys}) || ("\L$a" cmp "\L$b") } keys %data) { next if ($feat && $name ne $feat); my %arch_table = %{$data{$name}->{table}}; printf "%-${max_size_subsys}s ", $data{$name}->{subsys}; printf "%-${max_size_name}s ", $name; printf "%-${max_size_kconfig}s ", $data{$name}->{kconfig}; printf "%-${max_size_status}s ", $arch_table{$arch}; printf "%-s\n", $data{$name}->{description}; } print "=" x $max_size_subsys; print " "; print "=" x $max_size_name; print " "; print "=" x $max_size_kconfig; print " "; print "=" x $max_size_status; print " "; print "=" x $max_size_description; print "\n"; } # # list feature(s) for a given architecture # sub list_arch_features { print "#\n# Kernel feature support matrix of the '$arch' architecture:\n#\n"; foreach my $name (sort { ($data{$a}->{subsys} cmp $data{$b}->{subsys}) || ("\L$a" cmp "\L$b") } keys %data) { next if ($feat && $name ne $feat); my %arch_table = %{$data{$name}->{table}}; my $status = $arch_table{$arch}; $status = " " x ((4 - length($status)) / 2) . $status; printf " %${max_size_subsys}s/ ", $data{$name}->{subsys}; printf "%-${max_size_name}s: ", $name; printf "%-5s| ", $status; printf "%${max_size_kconfig}s # ", $data{$name}->{kconfig}; printf " %s\n", $data{$name}->{description}; } } # # Output a feature on all architectures # sub output_feature { my $title = "Feature $feat"; print "=" x length($title) . "\n"; print "$title\n"; print "=" x length($title) . "\n\n"; print ":Subsystem: $data{$feat}->{subsys} \n" if ($data{$feat}->{subsys}); print ":Kconfig: $data{$feat}->{kconfig} \n" if ($data{$feat}->{kconfig}); my $desc = $data{$feat}->{description}; $desc =~ s/^([a-z])/\U$1/; $desc =~ s/\.?\s*//; print "\n$desc.\n\n"; my $com = $data{$feat}->{comments}; $com =~ s/^\s+//; $com =~ s/\s+$//; if ($com) { print "Comments\n"; print "--------\n\n"; print "$com\n\n"; } print "=" x $max_size_arch_with_header; print " "; print "=" x $max_size_status; print "\n"; printf "%-${max_size_arch}s ", $h_arch; printf "%-${max_size_status}s", $h_status . "\n"; print "=" x $max_size_arch_with_header; print " "; print "=" x $max_size_status; print "\n"; my %arch_table = %{$data{$feat}->{table}}; foreach my $arch (sort keys %arch_table) { printf "%-${max_size_arch}s ", $arch; printf "%-${max_size_status}s\n", $arch_table{$arch}; } print "=" x $max_size_arch_with_header; print " "; print "=" x $max_size_status; print "\n"; } # # Output all features for all architectures # sub matrix_lines($$$) { my $desc_size = shift; my $status_size = shift; my $header = shift; my $fill; my $ln_marker; if ($header) { $ln_marker = "="; } else { $ln_marker = "-"; } $fill = $ln_marker; print "+"; print $fill x $max_size_name; print "+"; print $fill x $desc_size; print "+"; print $ln_marker x $status_size; print "+\n"; } sub output_matrix { my $title = "Feature status on all architectures"; my $notcompat = "Not compatible"; print "=" x length($title) . "\n"; print "$title\n"; print "=" x length($title) . "\n\n"; my $desc_title = "$h_kconfig / $h_description"; my $desc_size = $max_size_kconfig + 4; if (!$description_size) { $desc_size = $max_size_description if ($max_size_description > $desc_size); } else { $desc_size = $description_size if ($description_size > $desc_size); } $desc_size = $max_description_word if ($max_description_word > $desc_size); $desc_size = length($desc_title) if (length($desc_title) > $desc_size); $max_size_status = length($notcompat) if (length($notcompat) > $max_size_status); # Ensure that the status will fit my $min_status_size = $max_size_status + $max_size_arch + 6; $status_size = $min_status_size if ($status_size < $min_status_size); my $cur_subsys = ""; foreach my $name (sort { ($data{$a}->{subsys} cmp $data{$b}->{subsys}) or ("\L$a" cmp "\L$b") } keys %data) { if ($cur_subsys ne $data{$name}->{subsys}) { if ($cur_subsys ne "") { printf "\n"; } $cur_subsys = $data{$name}->{subsys}; my $title = "Subsystem: $cur_subsys"; print "$title\n"; print "=" x length($title) . "\n\n"; matrix_lines($desc_size, $status_size, 0); printf "|%-${max_size_name}s", $h_name; printf "|%-${desc_size}s", $desc_title; printf "|%-${status_size}s|\n", "Status per architecture"; matrix_lines($desc_size, $status_size, 1); } my %arch_table = %{$data{$name}->{table}}; my $cur_status = ""; my (@lines, @descs); my $line = ""; foreach my $arch (sort { ($arch_table{$b} cmp $arch_table{$a}) or ("\L$a" cmp "\L$b") } keys %arch_table) { my $status = $arch_table{$arch}; if ($status eq "---") { $status = $notcompat; } if ($status ne $cur_status) { if ($line ne "") { push @lines, $line; $line = ""; } $line = "- **" . $status . "**: " . $arch; } elsif (length($line) + length ($arch) + 2 < $status_size) { $line .= ", " . $arch; } else { push @lines, $line; $line = " " . $arch; } $cur_status = $status; } push @lines, $line if ($line ne ""); my $description = $data{$name}->{description}; while (length($description) > $desc_size) { my $d = substr $description, 0, $desc_size; # Ensure that it will end on a space # if it can't, it means that the size is too small # Instead of aborting it, let's print what we have if (!($d =~ s/^(.*)\s+.*/$1/)) { $d = substr $d, 0, -1; push @descs, "$d\\"; $description =~ s/^\Q$d\E//; } else { push @descs, $d; $description =~ s/^\Q$d\E\s+//; } } push @descs, $description; # Ensure that the full description will be printed push @lines, "" while (scalar(@lines) < 2 + scalar(@descs)); my $ln = 0; for my $line(@lines) { if (!$ln) { printf "|%-${max_size_name}s", $name; printf "|%-${desc_size}s", "``" . $data{$name}->{kconfig} . "``"; } elsif ($ln >= 2 && scalar(@descs)) { printf "|%-${max_size_name}s", ""; printf "|%-${desc_size}s", shift @descs; } else { printf "|%-${max_size_name}s", ""; printf "|%-${desc_size}s", ""; } printf "|%-${status_size}s|\n", $line; $ln++; } matrix_lines($desc_size, $status_size, 0); } } # # Parses all feature files located at $prefix dir # find({wanted =>\&parse_feat, no_chdir => 1}, $prefix); print STDERR Data::Dumper->Dump([\%data], [qw(*data)]) if ($debug); # # Handles the command # if ($cmd eq "current") { $arch = qx(uname -m | sed 's/x86_64/x86/' | sed 's/i386/x86/'); $arch =~s/\s+$//; } if ($cmd eq "ls" or $cmd eq "list") { if (!$arch) { $arch = qx(uname -m | sed 's/x86_64/x86/' | sed 's/i386/x86/'); $arch =~s/\s+$//; } list_arch_features; exit; } if ($cmd ne "validate") { if ($arch) { output_arch_table; } elsif ($feat) { output_feature; } else { output_matrix; } } __END__ =head1 NAME get_feat.pl - parse the Linux Feature files and produce a ReST book. =head1 SYNOPSIS B<get_feat.pl> [--debug] [--man] [--help] [--dir=<dir>] [--arch=<arch>] [--feature=<feature>|--feat=<feature>] <COMAND> [<ARGUMENT>] Where <COMMAND> can be: =over 8 B<current> - output table in ReST compatible ASCII format with features for this machine's architecture B<rest> - output table(s) in ReST compatible ASCII format with features in ReST markup language. The output is affected by --arch or --feat/--feature flags. B<validate> - validate the contents of the files under Documentation/features. B<ls> or B<list> - list features for this machine's architecture, using an easier to parse format. The output is affected by --arch flag. =back =head1 OPTIONS =over 8 =item B<--arch> Output features for an specific architecture, optionally filtering for a single specific feature. =item B<--feat> or B<--feature> Output features for a single specific feature. =item B<--dir> Changes the location of the Feature files. By default, it uses the Documentation/features directory. =item B<--enable-fname> Prints the file name of the feature files. This can be used in order to track dependencies during documentation build. =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 feature files from Documentation/features (by default), optionally producing results at ReST format. It supports output data per architecture, per feature or a feature x arch matrix. When used with B<rest> command, it will use either one of the tree formats: If neither B<--arch> or B<--feature> arguments are used, it will output a matrix with features per architecture. If B<--arch> argument is used, it will output the features availability for a given architecture. If B<--feat> argument is used, it will output the content of the feature file using ReStructured Text markup. =head1 BUGS Report bugs to Mauro Carvalho Chehab <mchehab+samsung@kernel.org> =head1 COPYRIGHT Copyright (c) 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