mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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scripts: get_feat.pl: add a script to handle Documentation/features
The Documentation/features contains a set of parseable files. It is not worth converting them to ReST format, as they're useful the way it is. It is, however, interesting to parse them and produce output on different formats: 1) Output the contents of a feature in ReST format; 2) Output what features a given architecture supports; 3) Output a matrix with features x architectures. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/8b0c1ad06d689283a6d78c4ccd188a02c3acc0de.1606748711.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Mauro Carvalho Chehab
Jonathan Corbet
parent
868770c92b
commit
52a4be3ffc
474
scripts/get_feat.pl
Executable file
474
scripts/get_feat.pl
Executable file
@ -0,0 +1,474 @@
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#!/usr/bin/perl
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# SPDX-License-Identifier: GPL-2.0
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use strict;
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use Pod::Usage;
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use Getopt::Long;
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use File::Find;
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use Fcntl ':mode';
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my $help;
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my $man;
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my $debug;
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my $arch;
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my $feat;
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my $prefix="Documentation/features";
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GetOptions(
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"debug|d+" => \$debug,
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"dir=s" => \$prefix,
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'help|?' => \$help,
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'arch=s' => \$arch,
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'feat=s' => \$feat,
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man => \$man
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) or pod2usage(2);
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pod2usage(1) if $help;
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pod2usage(-exitstatus => 0, -verbose => 2) if $man;
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pod2usage(2) if (scalar @ARGV < 1 || @ARGV > 2);
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my ($cmd, $arg) = @ARGV;
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pod2usage(2) if ($cmd ne "current" && $cmd ne "rest" && $cmd ne "validate");
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require Data::Dumper if ($debug);
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my %data;
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my %archs;
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#
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# Displays an error message, printing file name and line
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#
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sub parse_error($$$$) {
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my ($file, $ln, $msg, $data) = @_;
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$data =~ s/\s+$/\n/;
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print STDERR "Warning: file $file#$ln:\n\t$msg";
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if ($data ne "") {
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print STDERR ". Line\n\t\t$data";
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} else {
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print STDERR "\n";
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}
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}
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#
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# Parse a features file, storing its contents at %data
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#
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my $h_name = "Feature";
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my $h_kconfig = "Kconfig";
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my $h_description = "Description";
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my $h_subsys = "Subsystem";
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my $h_status = "Status";
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my $h_arch = "Architecture";
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my $max_size_name = length($h_name);
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my $max_size_kconfig = length($h_kconfig);
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my $max_size_description = length($h_description);
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my $max_size_subsys = length($h_subsys);
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my $max_size_status = length($h_status);
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my $max_size_arch = length($h_arch);
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sub parse_feat {
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my $file = $File::Find::name;
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my $mode = (stat($file))[2];
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return if ($mode & S_IFDIR);
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return if ($file =~ m,($prefix)/arch-support.txt,);
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return if (!($file =~ m,arch-support.txt$,));
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my $subsys = "";
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$subsys = $2 if ( m,.*($prefix)/([^/]+).*,);
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if (length($subsys) > $max_size_subsys) {
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$max_size_subsys = length($subsys);
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}
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my $name;
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my $kconfig;
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my $description;
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my $comments = "";
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my $last_status;
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my $ln;
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my %arch_table;
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print STDERR "Opening $file\n" if ($debug > 1);
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open IN, $file;
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while(<IN>) {
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$ln++;
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if (m/^\#\s+Feature\s+name:\s*(.*\S)/) {
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$name = $1;
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if (length($name) > $max_size_name) {
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$max_size_name = length($name);
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}
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next;
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}
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if (m/^\#\s+Kconfig:\s*(.*\S)/) {
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$kconfig = $1;
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if (length($kconfig) > $max_size_kconfig) {
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$max_size_kconfig = length($kconfig);
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}
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next;
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}
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if (m/^\#\s+description:\s*(.*\S)/) {
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$description = $1;
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if (length($description) > $max_size_description) {
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$max_size_description = length($description);
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}
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next;
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}
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next if (m/^\\s*$/);
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next if (m/^\s*\-+\s*$/);
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next if (m/^\s*\|\s*arch\s*\|\s*status\s*\|\s*$/);
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if (m/^\#\s*(.*)/) {
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$comments .= "$1\n";
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next;
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}
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if (m/^\s*\|\s*(\S+):\s*\|\s*(\S+)\s*\|\s*$/) {
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my $a = $1;
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my $status = $2;
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if (length($status) > $max_size_status) {
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$max_size_status = length($status);
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}
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if (length($a) > $max_size_arch) {
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$max_size_arch = length($a);
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}
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$status = "---" if ($status =~ m/^\.\.$/);
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$archs{$a} = 1;
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$arch_table{$a} = $status;
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next;
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}
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#Everything else is an error
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parse_error($file, $ln, "line is invalid", $_);
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}
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close IN;
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if (!$name) {
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parse_error($file, $ln, "Feature name not found", "");
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return;
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}
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parse_error($file, $ln, "Subsystem not found", "") if (!$subsys);
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parse_error($file, $ln, "Kconfig not found", "") if (!$kconfig);
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parse_error($file, $ln, "Description not found", "") if (!$description);
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if (!%arch_table) {
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parse_error($file, $ln, "Architecture table not found", "");
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return;
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}
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$data{$name}->{where} = $file;
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$data{$name}->{subsys} = $subsys;
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$data{$name}->{kconfig} = $kconfig;
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$data{$name}->{description} = $description;
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$data{$name}->{comments} = $comments;
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$data{$name}->{table} = \%arch_table;
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}
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#
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# Output feature(s) for a given architecture
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#
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sub output_arch_table {
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my $title = "Feature status on $arch architecture";
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print "=" x length($title) . "\n";
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print "$title\n";
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print "=" x length($title) . "\n\n";
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print "=" x $max_size_subsys;
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print " ";
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print "=" x $max_size_name;
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print " ";
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print "=" x $max_size_kconfig;
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print " ";
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print "=" x $max_size_status;
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print " ";
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print "=" x $max_size_description;
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print "\n";
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printf "%-${max_size_subsys}s ", $h_subsys;
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printf "%-${max_size_name}s ", $h_name;
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printf "%-${max_size_kconfig}s ", $h_kconfig;
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printf "%-${max_size_status}s ", $h_status;
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printf "%-${max_size_description}s\n", $h_description;
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print "=" x $max_size_subsys;
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print " ";
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print "=" x $max_size_name;
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print " ";
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print "=" x $max_size_kconfig;
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print " ";
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print "=" x $max_size_status;
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print " ";
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print "=" x $max_size_description;
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print "\n";
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foreach my $name (sort {
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($data{$a}->{subsys} cmp $data{$b}->{subsys}) ||
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($data{$a}->{name} cmp $data{$b}->{name})
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} keys %data) {
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next if ($feat && $name ne $feat);
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my %arch_table = %{$data{$name}->{table}};
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printf "%-${max_size_subsys}s ", $data{$name}->{subsys};
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printf "%-${max_size_name}s ", $name;
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printf "%-${max_size_kconfig}s ", $data{$name}->{kconfig};
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printf "%-${max_size_status}s ", $arch_table{$arch};
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printf "%-${max_size_description}s\n", $data{$name}->{description};
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}
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print "=" x $max_size_subsys;
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print " ";
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print "=" x $max_size_name;
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print " ";
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print "=" x $max_size_kconfig;
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print " ";
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print "=" x $max_size_status;
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print " ";
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print "=" x $max_size_description;
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print "\n";
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}
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#
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# Output a feature on all architectures
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#
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sub output_feature {
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my $title = "Feature $feat";
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print "=" x length($title) . "\n";
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print "$title\n";
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print "=" x length($title) . "\n\n";
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print ":Subsystem: $data{$feat}->{subsys} \n" if ($data{$feat}->{subsys});
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print ":Kconfig: $data{$feat}->{kconfig} \n" if ($data{$feat}->{kconfig});
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my $desc = $data{$feat}->{description};
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$desc =~ s/^([a-z])/\U$1/;
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$desc =~ s/\.?\s*//;
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print "\n$desc.\n\n";
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my $com = $data{$feat}->{comments};
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$com =~ s/^\s+//;
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$com =~ s/\s+$//;
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if ($com) {
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print "Comments\n";
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print "--------\n\n";
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print "$com\n\n";
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}
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print "=" x $max_size_arch;
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print " ";
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print "=" x $max_size_status;
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print "\n";
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printf "%-${max_size_arch}s ", $h_arch;
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printf "%-${max_size_status}s", $h_status . "\n";
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print "=" x $max_size_arch;
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print " ";
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print "=" x $max_size_status;
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print "\n";
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my %arch_table = %{$data{$feat}->{table}};
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foreach my $arch (sort keys %arch_table) {
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printf "%-${max_size_arch}s ", $arch;
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printf "%-${max_size_status}s\n", $arch_table{$arch};
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}
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print "=" x $max_size_arch;
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print " ";
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print "=" x $max_size_status;
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print "\n";
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}
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#
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# Output all features for all architectures
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#
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sub matrix_lines {
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print "=" x $max_size_subsys;
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print " ";
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print "=" x $max_size_name;
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print " ";
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foreach my $arch (sort keys %archs) {
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my $len = $max_size_status;
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$len = length($arch) if ($len < length($arch));
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print "=" x $len;
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print " ";
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}
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print "=" x $max_size_kconfig;
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print " ";
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print "=" x $max_size_description;
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print "\n";
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}
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sub output_matrix {
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my $title = "Feature List (feature x architecture)";
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print "=" x length($title) . "\n";
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print "$title\n";
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print "=" x length($title) . "\n\n";
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matrix_lines;
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printf "%-${max_size_subsys}s ", $h_subsys;
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printf "%-${max_size_name}s ", $h_name;
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foreach my $arch (sort keys %archs) {
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printf "%-${max_size_status}s ", $arch;
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}
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printf "%-${max_size_kconfig}s ", $h_kconfig;
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printf "%-${max_size_description}s\n", $h_description;
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matrix_lines;
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foreach my $name (sort {
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($data{$a}->{subsys} cmp $data{$b}->{subsys}) ||
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($data{$a}->{name} cmp $data{$b}->{name})
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} keys %data) {
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printf "%-${max_size_subsys}s ", $data{$name}->{subsys};
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printf "%-${max_size_name}s ", $name;
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my %arch_table = %{$data{$name}->{table}};
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foreach my $arch (sort keys %arch_table) {
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my $len = $max_size_status;
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$len = length($arch) if ($len < length($arch));
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printf "%-${len}s ", $arch_table{$arch};
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}
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printf "%-${max_size_kconfig}s ", $data{$name}->{kconfig};
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printf "%-${max_size_description}s\n", $data{$name}->{description};
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}
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matrix_lines;
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}
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#
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# Parses all feature files located at $prefix dir
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#
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find({wanted =>\&parse_feat, no_chdir => 1}, $prefix);
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print STDERR Data::Dumper->Dump([\%data], [qw(*data)]) if ($debug);
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#
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# Handles the command
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#
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if ($cmd eq "current") {
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$arch = qx(uname -m | sed 's/x86_64/x86/' | sed 's/i386/x86/');
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$arch =~s/\s+$//;
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}
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if ($cmd ne "validate") {
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if ($arch) {
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output_arch_table;
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} elsif ($feat) {
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output_feature;
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} else {
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output_matrix;
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}
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}
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__END__
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=head1 NAME
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get_feat.pl - parse the Linux Feature files and produce a ReST book.
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=head1 SYNOPSIS
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B<get_feat.pl> [--debug] [--man] [--help] [--dir=<dir>]
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[--arch=<arch>] [--feat=<feature>] <COMAND> [<ARGUMENT>]
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Where <COMMAND> can be:
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=over 8
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B<current> - output features for this machine's architecture
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B<rest> - output features in ReST markup language
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B<validate> - validate the feature contents
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=back
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=head1 OPTIONS
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=over 8
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=item B<--arch>
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Output features for an specific architecture, optionally filtering for
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a single specific feature.
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=item B<--feat>
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Output features for a single specific architecture.
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=item B<--dir>
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Changes the location of the Feature files. By default, it uses
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the Documentation/features directory.
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=item B<--debug>
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Put the script in verbose mode, useful for debugging. Can be called multiple
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times, to increase verbosity.
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=item B<--help>
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Prints a brief help message and exits.
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=item B<--man>
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Prints the manual page and exits.
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=back
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=head1 DESCRIPTION
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Parse the Linux feature files from Documentation/features (by default),
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optionally producing results at ReST format.
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It supports output data per architecture, per feature or a
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feature x arch matrix.
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When used with B<rest> command, it will use either one of the tree formats:
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If neither B<--arch> or B<--feature> arguments are used, it will output a
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matrix with features per architecture.
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If B<--arch> argument is used, it will output the features availability for
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a given architecture.
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If B<--feat> argument is used, it will output the content of the feature
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file using ReStructured Text markup.
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=head1 BUGS
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Report bugs to Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
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=head1 COPYRIGHT
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Copyright (c) 2019 by Mauro Carvalho Chehab <mchehab+samsung@kernel.org>.
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License GPLv2: GNU GPL version 2 <http://gnu.org/licenses/gpl.html>.
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This is free software: you are free to change and redistribute it.
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There is NO WARRANTY, to the extent permitted by law.
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=cut
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