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inspec/lib/utils/simpleconfig.rb

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# encoding: utf-8
# copyright: 2015, Dominik Richter
# license: All rights reserved
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# author: Dominik Richter
# author: Christoph Hartmann
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require 'utils/parser'
class SimpleConfig
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include CommentParser
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attr_reader :params, :groups
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def initialize(raw_data, opts = {})
parse(raw_data, opts)
end
# Parse some data
# quotes: quoting characters, which are parsed, so everything inside
# it will be part of a string
# multiline: allow quoted text to span multiple lines
# comment_char: char which identifies comments
# standalone_comments: comments must appear alone in a line; if set to true,
# no comments can be added to the end of an assignment/statement line
def parse(raw_data, opts = nil)
@params = {}
@groups = []
@vals = @params
options = default_options.merge(opts || {})
return if raw_data.nil?
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# prepare raw data if required
if !options[:line_separator].nil?
raw_data = raw_data.tr(options[:line_separator], "\n")
end
rest = raw_data
rest = parse_rest(rest, options) until rest.empty?
end
private
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def parse_values(match, values)
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start_idx = 2
i = 0
count = values - 1
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return match[start_idx] if values == 1
# iterate over expected parameters
values = []
loop do
values.push(match[start_idx + i])
i += 1
break if i > count
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end
values
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end
def parse_params_line(line, opts)
# now line contains what we are interested in parsing
# check if it is an assignment
m = opts[:assignment_re].match(line)
return nil if m.nil?
if opts[:multiple_values]
@vals[m[1]] ||= []
@vals[m[1]].push(parse_values(m, opts[:key_vals]))
else
@vals[m[1]] = parse_values(m, opts[:key_vals])
end
end
def parse_group_line(line, opts)
return nil if opts[:group_re].nil?
m = opts[:group_re].match(line)
return nil if m.nil?
@groups.push(m[1])
@vals = @params[m[1]] = {}
end
def parse_implicit_assignment_line(line, opts)
return nil if is_empty_line(line)
if opts[:multiple_values]
@vals[line.strip] ||= []
else
@vals[line.strip] = ''
end
end
def parse_rest(rest, opts)
line, idx_nl = parse_comment_line(rest, opts)
parse_params_line(line, opts) or
parse_group_line(line, opts) or
parse_implicit_assignment_line(line, opts)
# return whatever is left
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rest[(idx_nl + 1)..-1] || ''
end
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def is_empty_line(l)
l =~ /^\s*$/
end
def default_options
{
quotes: '',
multiline: false,
comment_char: '#',
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line_separator: nil, # uses this char to seperate lines before parsing
assignment_re: /^\s*([^=]*?)\s*=\s*(.*?)\s*$/,
group_re: /\[([^\]]+)\]\s*$/,
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key_vals: 1, # default for key=value, may require for 'key val1 val2 val3'
standalone_comments: false,
multiple_values: false,
}
end
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end