| #!/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 |
