Module: Aws::Cfn::Compiler::Compile

Included in:
Base
Defined in:
lib/aws/cfn/compiler/mixins/compile.rb

Instance Method Summary collapse

Instance Method Details

#compile_spec ⇒ Object 



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# File 'lib/aws/cfn/compiler/mixins/compile.rb', line 99

def compile_spec
  desc =  if @config[:description]
            @config[:description]
          elsif @spec and @spec['Description']
            @spec['Description']
          elsif @config[:template]
            File.basename(@config[:template]).gsub(%r/\..*$/, '')
          else
            'compiled template'
          end

  vers =  if @config[:formatversion]
            @config[:formatversion]
          else
            if @spec and @spec['AWSTemplateFormatVersion']
              @spec['AWSTemplateFormatVersion']
            else
              '2010-09-09'
            end
          end

  desc = compile_value(desc)

  # [2014-06-29 Christo] IIRC it is important that the section names be strings instead of symbols ...
  # noinspection RubyStringKeysInHashInspection
  compiled =
      {
          'AWSTemplateFormatVersion' => vers,
          'Description'              => desc,
          'Mappings'                 => @items['Mappings'],
          'Parameters'               => @items['Parameters'],
          'Conditions'               => @items['Conditions'],
          'Resources'                => @items['Resources'],
          'Outputs'                  => @items['Outputs'],
      }

  @all_sections.each do |section|
    value = compile_value(@items[section])
    compiled[section] = value if value
  end
  compiled
end

#compile_value(expr) ⇒ Object 



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# File 'lib/aws/cfn/compiler/mixins/compile.rb', line 142

def compile_value(expr)
  begin
    if expr.is_a?(Hash)
      val = expr
      expr.each do |k,v|
        val[k] = compile_value(v)
      end
      val
    elsif expr.is_a?(Array)
      expr.map{ |e|
        compile_value(e)
      }
    elsif expr.is_a?(Symbol)
      expr
    elsif expr.is_a?(NilClass)
      expr
    elsif expr.is_a?(TrueClass)
      expr
    elsif expr.is_a?(FalseClass)
      expr
    elsif expr.is_a?(Fixnum)
      expr
    elsif expr.is_a?(String)
      val = expr
      if expr.match(%r'#\{.+?\}')
        eval %(val = "#{expr}")
      end
      val
    else
      raise "The expression type #{expr.class.name} cannot be compiled!\n#{expr}"
    end
  rescue Exception => e
    abort! "Specification expression error: #{e.message} on '#{expr}'"
  end
end

#find_conditions(hash, level = 0) ⇒ Object 



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# File 'lib/aws/cfn/compiler/mixins/compile.rb', line 269

def find_conditions(hash,level=0)
  if hash.is_a? Hash
    hash.keys.collect do |key|
      if 'Condition' == key and level <= 4
        if hash[key].is_a?(Array)
          hash[key].first
        else
          hash[key]
        end
      else
        find_conditions(hash[key],level+1)
      end
    end.flatten.compact.uniq
  elsif hash.is_a? Array
    hash.collect{|a| find_conditions(a,level+1)}.flatten.compact.uniq
  end
end

#find_fns(hash) ⇒ Object 



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# File 'lib/aws/cfn/compiler/mixins/compile.rb', line 237

def find_fns(hash)
  a = []
  if hash.is_a? Hash
    hash.each do |key,val|
      if key.match %r'^Fn::'
        a << key
      end
      a << find_fns(val)
    end
  elsif hash.is_a? Array
    hash.collect{|e|
      a << find_fns(e)
    }
  end
  r = a.flatten.compact.uniq
end

#find_maps(hash, source = []) ⇒ Object 



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# File 'lib/aws/cfn/compiler/mixins/compile.rb', line 254

def find_maps(hash,source=[])
  if hash.is_a? Hash
    hash.keys.collect do |key|
      if 'Fn::FindInMap' == key
        { :mapping => hash[key].first, :source => source }
      else
        find_maps(hash[key], [ source, key ].flatten!)
      end
    end.flatten.compact.uniq
  elsif hash.is_a? Array
    hash.collect{|a|
      find_maps(a,source)}.flatten.compact.uniq
  end
end

#find_refs(hash, type = 'Reference', parent = '') ⇒ Object 



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# File 'lib/aws/cfn/compiler/mixins/compile.rb', line 178

def find_refs(hash, type='Reference', parent='')
  h = {}
  newparent = parent
  if hash.is_a? Hash
    hash.keys.collect do |key|
      if @all_sections.include? key
        type = key#.gsub(/s$/, '')
        newparent = key
      elsif @all_sections.include? parent
        newparent = key
      end
      if %w{Ref}.include? key
        # h = { hash[key] => [type,newparent] }
        h[hash[key]] = [type,newparent]
      elsif 'Fn::GetAtt' == key
        # h = { hash[key].first => [type,newparent] }
        h[hash[key].first] = [type,newparent]
      elsif 'DependsOn' == key
        if hash[key].is_a?(Array)
          # h = {}
          hash[key].map { |dep|
            h[dep] = [type,newparent]
          }
        else
          # h = { hash[key] => [type,newparent] }
          h[hash[key]] = [type,newparent]
        end
      else
        a = find_refs(hash[key],type,newparent)
        h = merge(h, a, *[type,newparent])
      end
    end.flatten.compact.uniq
  elsif hash.is_a? Array
    a = hash.map{|i| find_refs(i,type,newparent) }
    h = merge(h, a, type, *[type,newparent])
  end
  h
end

#get_meta(spec, args) ⇒ Object 



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# File 'lib/aws/cfn/compiler/mixins/compile.rb', line 6

def get_meta(spec,args)

  if spec.is_a?(Hash)
    if args.is_a?(Array)
      args.flatten!
      if args.size > 0
        a = args.shift
        get_meta(get_meta(spec, a), args)
      else
        spec
      end
    elsif args.is_a?(Hash)
      h = {}
      args.map { |e, v| h[e] = get_meta(spec, v) }
      h
    elsif args.is_a?(Symbol)
      # noinspection RubyStringKeysInHashInspection
      case args
        when :Compiler
          {
              'Name'    => ::Aws::Cfn::Compiler.name,
              'Version' => ::Aws::Cfn::Compiler::VERSION,
          }
        when :Specification
          File.basename(@config[:specification])
        when :Template
          File.basename(@config[:template])
        when :DescriptionString
          v = nil
          begin
            dependson = meta(:DependsOn) || []
          rescue
            dependson = []
          end
          begin
            required = meta(:Require)['Template']
            ok = true
            required.map { |e| ok = (ok and e.is_a?(Hash)) }
            if ok
              required = required.map { |e| e.keys }.flatten
            else
              required = {}
            end
          rescue
            required = {}
          end
          raise "Bad Require:Template: meta-data ...\n#{meta(:Require).ai}. Must resolve to a Hash!\nFor example:\nRequire:\n  Template:\n  - my-template: '>= 0.0.0'" unless required
          begin
            # if dependson or required
              # noinspection RubyHashKeysTypesInspection
              parents = {}
              dependson.each { |i| parents[i] = true }
              required.each { |i| parents[i] = true }
              parents = "Parents: [#{parents.keys.join(',')}] "
            # else
            #   parents = ''
            # end
          rescue
            parents = ''
          end
          # noinspection RubyExpressionInStringInspection
          template = '#{meta(:Project,:Description)}(#{meta(:Project,:Name)}) - #{meta(:Name)} v#{meta(:Version)}; #{parents} [Compiled with #{meta(:Compiler,:Name)} v#{meta(:Compiler,:Version)}]'
          begin
            eval %(v = "#{template}" )
          rescue Exception => e
            raise e.message + "\nIn:\n" + template
          end
          v
        else
          get_meta(spec, args.to_s)
      end
    elsif args.is_a?(String)
      if spec[args]
        spec[args]
      else
        nil # raise "Meta:'#{args}' not set"
      end
    else
      nil
    end
  else
    spec
  end
end

#map_resource_reference(rsrc) ⇒ Object 



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# File 'lib/aws/cfn/compiler/mixins/compile.rb', line 287

def map_resource_reference(rsrc)
  path = nil
  sub  = nil
  ref  = nil
  rel  = false
  # noinspection RubyParenthesesAroundConditionInspection
  if rsrc.match %r'^(\.\./.*?)::(.*)$'
    # Relative path stack reference
    path,sub,ref,rel  = map_resource_reference(File.basename(rsrc))
  elsif rsrc.match %r'^(~/.*?)$'
    # Relative to HOME
    path,sub,ref,rel  = map_resource_reference(File.expand_path(rsrc))
  elsif rsrc.match %r'^(\.\./[^:]*?)$'
    # Relative path
    path = File.dirname(rsrc)
    sub  = File.basename(path)
    path = File.dirname(path)
    ref  = File.basename(rsrc)
    rel  = true
  elsif rsrc.match %r'(^/.*?)::(.*)$'
    # Absolute path
    _,sub,ref,rel  = map_resource_reference(File.basename(rsrc))
    path = File.realpath(File.join(File.dirname(rsrc),_))
  elsif rsrc.match %r'(^/.*?[^:]*?)$'
    # Absolute path
    path = File.dirname(rsrc)
    sub  = File.basename(path)
    path = File.dirname(path)
    ref  = File.basename(rsrc)
  elsif (match = rsrc.match %r'^(.*?)::(.*)$')
    # Inherited stack reference
    ref = match[2]
    # noinspection RubyParenthesesAroundConditionInspection
    if (subm = match[1].match(%r'^(.+?)/(.+)$'))
      # Stack referenced with a path
      @config[:brick_path_list].each do |p|
        path = File.join(p,subm[1]) # File.dirname(@config[:directory])
        if File.directory?(path)
          break
        else
          path = nil
        end
      end
      sub = subm[2]
    else
      # Stack referenced on stack_path ...
      pstk = @config[:stack_path_list].map{ |p|
        if File.basename(p) == match[1]
          p
        else
          []
        end
      }.flatten.shift
      if pstk
        parseList(@config[:brick_path],':').each do |p|
          path = File.join(pstk,p) # File.dirname(@config[:directory])
          if File.directory?(path)
            break
          else
            path = nil
          end
        end
      end
    end
  else
    # Otherwise it is what it seems ;)
    ref  = rsrc
  end
  [path,sub,ref,rel]
end

#merge(h, a, *type) ⇒ Object 



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# File 'lib/aws/cfn/compiler/mixins/compile.rb', line 217

def merge(h, a, *type)
  if a.is_a? Hash
    if a.size > 0
      h.merge! a
    end
  else
    a.flatten.compact.uniq.map { |i|
      if i.is_a? Hash
        if i.size > 0
          h.merge! i
          h
        end
      else
        h[i] = type
      end
    }
  end
  h
end

#meta(*args) ⇒ Object 



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# File 'lib/aws/cfn/compiler/mixins/compile.rb', line 91

def meta(*args)
  if @spec['Meta']
    get_meta(@spec['Meta'],args)
  else
    raise "Specification contained no metadata while expanding #{args}"
  end
end