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https://github.com/inspec/inspec
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109 lines
2.9 KiB
Ruby
109 lines
2.9 KiB
Ruby
# encoding: utf-8
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# copyright: 2015, Dominik Richter
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# license: All rights reserved
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class SimpleConfig
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attr_reader :params
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def initialize(raw_data, opts = {})
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parse(raw_data, opts)
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end
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# Parse some data
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# quotes: quoting characters, which are parsed, so everything inside
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# it will be part of a string
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# multiline: allow quoted text to span multiple lines
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# comment_char: char which identifies comments
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# standalone_comments: comments must appear alone in a line; if set to true,
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# no comments can be added to the end of an assignment/statement line
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def parse(raw_data, opts = {})
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@params = {}
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options = default_options.merge(opts)
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rest = raw_data
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rest = parse_rest(rest, options) while rest.length > 0
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end
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private
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def parse_values(match, values)
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start_idx = 2
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i = 0
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count = values - 1
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return match[start_idx] if (values == 1)
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# iterate over expected parameters
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values = []
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loop do
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values.push(match[start_idx + i])
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i += 1
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break if i > count
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end
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values
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end
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def parse_comment_line(rest, opts)
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idx_nl = rest.index("\n")
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idx_comment = rest.index(opts[:comment_char])
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idx_nl = rest.length if idx_nl.nil?
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idx_comment = idx_nl + 1 if idx_comment.nil?
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line = ''
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# is a comment inside this line
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if idx_comment < idx_nl && idx_comment != 0
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line = rest[0..(idx_comment - 1)]
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# in case we don't allow comments at the end
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# of an assignment/statement, ignore it and fall
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# back to treating this as a regular line
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if opts[:standalone_comments] && !is_empty_line(line)
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line = rest[0..(idx_nl - 1)]
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end
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# if there is no comment in this line
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elsif idx_comment > idx_nl && idx_nl != 0
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line = rest[0..(idx_nl - 1)]
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end
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[line, idx_nl]
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end
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def parse_line_params(line, opts)
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# now line contains what we are interested in parsing
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# check if it is an assignment
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m = opts[:assignment_re].match(line)
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if !m.nil?
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if opts[:multiple_values]
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@params[m[1]] ||= []
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@params[m[1]].push(parse_values(m, opts[:key_vals]))
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else
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@params[m[1]] = parse_values(m, opts[:key_vals])
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end
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elsif !is_empty_line(line)
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if opts[:multiple_values]
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@params[line.strip] ||= []
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else
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@params[line.strip] = ''
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end
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end
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end
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def parse_rest(rest, opts)
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line, idx_nl = parse_comment_line(rest, opts)
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parse_line_params(line, opts)
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# return whatever is left
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rest[(idx_nl + 1)..-1] || ''
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end
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def is_empty_line(l)
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l =~ /^\s*$/
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end
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def default_options
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{
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quotes: '',
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multiline: false,
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comment_char: '#',
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assignment_re: /^\s*([^=]*?)\s*=\s*(.*?)\s*$/,
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key_vals: 1, # default for key=value, may require for 'key val1 val2 val3'
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standalone_comments: false,
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multiple_values: false,
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}
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end
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end
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