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#!/usr/bin/env perl
# vim: ft=perl ts=2 sts=2 sw=2 et ai
# -*- Mode: perl; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
#
# Copyright 2014 Red Hat, Inc.
#
#
# The script parses nm-setting-*.c files and extracts documentation related
# to setting plugins. The documentation is in a simple format of lines
# "keyword: value". The documentation is enclosed between tags
# ---<plugin-name>--- and ---end---
# Recognized keywords are:
# "property: " - property name
# "variable: " - name of the variable used by the plugin
# "format: " - format of the value in 'keyfile' plugin
# "default: " - default value when variable is not used
# "values: " - allowed values (e.g. for enumerations)
# "example: " - example(s)
# "description: " - description text
# Value is an arbitrary string that can span over multiple lines.
#
# ifcfg-rh specifics:
# - mark NM extension variables with (+), e.g. variable: UUID(+)
#
use strict;
use warnings;
use v5.10;
# global variables
my @keywords = ("property", "variable", "format", "values", "default", "example", "description");
my @data;
my $fo;
(scalar @ARGV >= 3) or die "Usage: $0 <plugin> <output-xml-file> <srcfiles>\n";
my ($plugin, $output, (@source_files)) = @ARGV;
my $start_tag = "---$plugin---\\s*\$";
my $end_tag = '---end---';
# open output file
open $fo, '>', $output or die "Can't open $output: $!";
# write XML header
write_header();
# write generated documenation for each setting
foreach my $c_file (@source_files) {
my $setting_name = get_setting_name($c_file);
if ($setting_name) {
write_item("<setting name=\"$setting_name\">");
scan_doc_comments($c_file, $start_tag, $end_tag);
write_item("</setting>");
}
}
# write XML footer
write_footer();
# close output file
close $fo;
### --- subroutines --- ###
# get setting name from NM_SETTING_*_SETTING_NAME constant in C header file
sub get_setting_name {
my $path = $_[0];
$path =~ s/c$/h/; # use header file to find out setting name
open my $fh, '<', $path or die "Can't open $path: $!";
while (my $line = <$fh>) {
if ($line =~ /NM_SETTING_.+SETTING_NAME\s+\"(\S+)\"/) {
return $1;
}
}
}
# scan source setting file for documentation tags and write them to XML
sub scan_doc_comments {
my($setting_file, $start, $end) = @_;
open my $fi, '<', $setting_file or die "Can't open $setting_file: $!";
while (<$fi>) {
if (/$start/ .. /$end/) {
next if /$start/;
if (/$end/) {
process_data();
} else {
push @data, $_;
}
next;
}
# ignore text not inside marks
}
close $fi;
}
# process plugin property documentation comments
sub process_data {
return if not @data;
my $kwd_pat = join("|", @keywords);
my %parsed_data;
my $this_key;
foreach (@data) {
if (/^\s*\**\s+($kwd_pat):\s+(.*?)\s*$/) {
$this_key = $1;
$parsed_data{$this_key} = "$2\n";
} elsif (/^\s*\**\s+(.*?)\s*$/) {
die "Extra mess in a comment: $_" unless $this_key;
$parsed_data{$this_key} .= "$1\n";
}
}
# now write a line into the XML
my $name = $parsed_data{property} // "";
my $var = $parsed_data{variable} // $name; # fallback to "property: "
my $format = $parsed_data{format} // "";
my $values = $parsed_data{values} // "";
my $def = $parsed_data{default} // "";
my $exam = $parsed_data{example} // "";
my $desc = $parsed_data{description} // "";
chomp($name, $var, $format, $values, $def, $exam, $desc);
escape_xml_chars($name, $var, $format, $values, $def, $exam, $desc);
my $foo = sprintf("<property name=\"%s\" variable=\"%s\" format=\"%s\" values=\"%s\" ".
"default=\"%s\" example=\"%s\" description=\"%s\"/>",
$name, $var, $format, $values, $def, $exam, $desc);
write_item($foo);
@data = ();
}
# - XML handling -
sub write_header {
(my $header =
qq{<?xml version=\"1.0\"?>
<!DOCTYPE nm-$plugin-docs [
]>
<nm-$plugin-docs>
}) =~ s/^ {7}//mg;
print {$fo} $header;
}
sub write_footer {
my $footer = "</nm-$plugin-docs>";
print {$fo} $footer;
}
sub write_item {
my $str = join("", @_);
print {$fo} $str, "\n";
}
sub escape_xml_chars {
# http://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references#Predefined%5Fentities%5Fin%5FXML
foreach my $val (@_) {
$val =~ s/&/&/sg;
$val =~ s/</</sg;
$val =~ s/>/>/sg;
$val =~ s/"/"/sg;
$val =~ s/'/'/sg;
}
}
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