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-rwxr-xr-xscripts/get_feat.pl474
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diff --git a/scripts/get_feat.pl b/scripts/get_feat.pl
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+++ b/scripts/get_feat.pl
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+#!/usr/bin/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 $arch;
+my $feat;
+my $prefix="Documentation/features";
+
+GetOptions(
+ "debug|d+" => \$debug,
+ "dir=s" => \$prefix,
+ 'help|?' => \$help,
+ 'arch=s' => \$arch,
+ 'feat=s' => \$feat,
+ 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 "current" && $cmd ne "rest" && $cmd ne "validate");
+
+require Data::Dumper if ($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 $max_size_arch = length($h_arch);
+
+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$,));
+
+ 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);
+ }
+ 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;
+}
+
+#
+# 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}) ||
+ ($data{$a}->{name} cmp $data{$b}->{name})
+ } 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 "%-${max_size_description}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";
+}
+
+#
+# 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;
+ 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;
+ 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;
+ print " ";
+ print "=" x $max_size_status;
+ print "\n";
+}
+
+#
+# Output all features for all architectures
+#
+
+sub matrix_lines {
+ print "=" x $max_size_subsys;
+ print " ";
+ print "=" x $max_size_name;
+ print " ";
+
+ foreach my $arch (sort keys %archs) {
+ my $len = $max_size_status;
+
+ $len = length($arch) if ($len < length($arch));
+
+ print "=" x $len;
+ print " ";
+ }
+ print "=" x $max_size_kconfig;
+ print " ";
+ print "=" x $max_size_description;
+ print "\n";
+}
+
+sub output_matrix {
+
+ my $title = "Feature List (feature x architecture)";
+
+ print "=" x length($title) . "\n";
+ print "$title\n";
+ print "=" x length($title) . "\n\n";
+
+ matrix_lines;
+
+ printf "%-${max_size_subsys}s ", $h_subsys;
+ printf "%-${max_size_name}s ", $h_name;
+
+ foreach my $arch (sort keys %archs) {
+ printf "%-${max_size_status}s ", $arch;
+ }
+ printf "%-${max_size_kconfig}s ", $h_kconfig;
+ printf "%-${max_size_description}s\n", $h_description;
+
+ matrix_lines;
+
+ foreach my $name (sort {
+ ($data{$a}->{subsys} cmp $data{$b}->{subsys}) ||
+ ($data{$a}->{name} cmp $data{$b}->{name})
+ } keys %data) {
+ printf "%-${max_size_subsys}s ", $data{$name}->{subsys};
+ printf "%-${max_size_name}s ", $name;
+
+ my %arch_table = %{$data{$name}->{table}};
+
+ foreach my $arch (sort keys %arch_table) {
+ my $len = $max_size_status;
+
+ $len = length($arch) if ($len < length($arch));
+
+ printf "%-${len}s ", $arch_table{$arch};
+ }
+ printf "%-${max_size_kconfig}s ", $data{$name}->{kconfig};
+ printf "%-${max_size_description}s\n", $data{$name}->{description};
+ }
+
+ matrix_lines;
+}
+
+
+#
+# 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 ($cmd ne "validate") {
+ if ($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>] [--feat=<feature>] <COMAND> [<ARGUMENT>]
+
+Where <COMMAND> can be:
+
+=over 8
+
+B<current> - output features for this machine's architecture
+
+B<rest> - output features in ReST markup language
+
+B<validate> - validate the feature contents
+
+=back
+
+=head1 OPTIONS
+
+=over 8
+
+=item B<--arch>
+
+Output features for an specific architecture, optionally filtering for
+a single specific feature.
+
+=item B<--feat>
+
+Output features for a single specific architecture.
+
+=item B<--dir>
+
+Changes the location of the Feature files. By default, it uses
+the Documentation/features 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 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