mirror of
https://github.com/inspec/inspec
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104 lines
2.8 KiB
Ruby
104 lines
2.8 KiB
Ruby
# author: Dominik Richter
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# author: Christoph Hartmann
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require 'parslet'
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class NginxParser < Parslet::Parser
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root :outermost
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# only designed for rabbitmq config files for now:
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rule(:outermost) { filler? >> exp.repeat }
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rule(:filler?) { one_filler.repeat }
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rule(:one_filler) { match('\s+') | match["\n"] | comment }
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rule(:space) { match('\s+') }
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rule(:comment) { str('#') >> (match["\n\r"].absent? >> any).repeat }
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rule(:exp) {
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section | assignment
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}
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rule(:assignment) {
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(identifier >> values.maybe.as(:args)).as(:assignment) >> str(';') >> filler?
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}
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rule(:standard_identifier) {
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(match('[a-zA-Z]') >> match('\S').repeat).as(:identifier) >> space >> space.repeat
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}
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rule(:quoted_identifier) {
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str('"') >> (str('"').absent? >> any).repeat.as(:identifier) >> str('"') >> space.repeat
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}
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rule(:identifier) {
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standard_identifier | quoted_identifier
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}
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rule(:standard_value) {
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((match(/[#;{'"]/).absent? >> any) >> (
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str('\\') >> any | match('[#;{]|\s').absent? >> any
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).repeat).as(:value) >> space.repeat
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}
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rule(:single_quoted_value) {
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str("'") >> (
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str('\\') >> any | str("'").absent? >> any
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).repeat.as(:value) >> str("'") >> space.repeat
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}
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rule(:double_quoted_value) {
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str('"') >> (
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str('\\') >> any | str('"').absent? >> any
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).repeat.as(:value) >> str('"') >> space.repeat
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}
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rule(:quoted_value) {
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single_quoted_value | double_quoted_value
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}
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rule(:value) {
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standard_value | quoted_value
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}
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rule(:values) {
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value.repeat >> space.maybe
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}
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rule(:section) {
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identifier.as(:section) >> values.maybe.as(:args) >> str('{') >> filler? >> exp.repeat.as(:expressions) >> str('}') >> filler?
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}
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end
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class NginxTransform < Parslet::Transform
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Group = Struct.new(:id, :args, :body)
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Exp = Struct.new(:key, :vals)
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def self.assemble_binary(seq)
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b = ErlangBitstream.new
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seq.each { |i| b.add(i) }
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b.value
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end
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rule(section: { identifier: simple(:x) }, args: subtree(:y), expressions: subtree(:z)) { Group.new(x.to_s, y, z) }
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rule(assignment: { identifier: simple(:x), args: subtree(:y) }) { Exp.new(x.to_s, y) }
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rule(value: simple(:x)) { x.to_s }
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end
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class NginxConfig
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def self.parse(content)
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lex = NginxParser.new.parse(content)
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tree = NginxTransform.new.apply(lex)
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gtree = NginxTransform::Group.new(nil, '', tree)
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read_nginx_group(gtree)
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rescue Parslet::ParseFailed => err
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raise "Failed to parse NginX config: #{err}"
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end
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def self.read_nginx_group(t)
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agg_conf = Hash.new([])
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agg_conf['_'] = t.args unless t.args == ''
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groups, conf = t.body.partition { |i| i.is_a? NginxTransform::Group }
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conf.each { |x| agg_conf[x.key] += [x.vals] }
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groups.each { |x| agg_conf[x.id] += [read_nginx_group(x)] }
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agg_conf
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end
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end
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