Module: PuppetfileResolver::Puppetfile::Parser::R10KEval

Defined in:
lib/puppetfile-resolver/puppetfile/parser/r10k_eval.rb,
lib/puppetfile-resolver/puppetfile/parser/r10k_eval/dsl.rb,
lib/puppetfile-resolver/puppetfile/parser/r10k_eval/module/git.rb,
lib/puppetfile-resolver/puppetfile/parser/r10k_eval/module/svn.rb,
lib/puppetfile-resolver/puppetfile/parser/r10k_eval/module/forge.rb,
lib/puppetfile-resolver/puppetfile/parser/r10k_eval/module/local.rb,
lib/puppetfile-resolver/puppetfile/parser/r10k_eval/puppet_module.rb,
lib/puppetfile-resolver/puppetfile/parser/r10k_eval/module/invalid.rb

Overview

Parses a Puppetfile using the instance_eval method from R10K

Defined Under Namespace

Modules: Module, PuppetModule Classes: DSL

Class Method Summary collapse

Class Method Details

.parse(puppetfile_contents) ⇒ Object 



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# File 'lib/puppetfile-resolver/puppetfile/parser/r10k_eval.rb', line 15

def self.parse(puppetfile_contents)
  document = ::PuppetfileResolver::Puppetfile::Document.new(puppetfile_contents)

  puppetfile_dsl = DSL.new(document)
  begin
    puppetfile_dsl.instance_eval(puppetfile_contents, PUPPETFILE_MONIKER)
  rescue StandardError, LoadError => e
    # Find the originating error from within the puppetfile
    loc = e.backtrace_locations
           .select { |item| item.absolute_path == PUPPETFILE_MONIKER }
           .first
    start_line_number = loc.nil? ? 0 : loc.lineno - 1 # Line numbers from ruby are base 1
    end_line_number = loc.nil? ? puppetfile_contents.lines.count - 1 : loc.lineno - 1 # Line numbers from ruby are base 1
    # Note - Ruby doesn't give a character position so just highlight the entire line

    err = PuppetfileResolver::Puppetfile::Parser::ParserError.new(e.to_s)
    err.location = PuppetfileResolver::Puppetfile::DocumentLocation.new.tap do |doc_loc|
      doc_loc.start_line = start_line_number
      doc_loc.end_line = end_line_number
    end
    raise err, e.backtrace
  rescue SyntaxError => e
    # Syntax Errrors are special as they don't appear in the backtrace :-(
    # Sytnax Errors are _really_ horrible as they don't give you the line or character position
    # as methods on the error. Instead we have to use janky regexes to get the information
    matches = /^#{PUPPETFILE_MONIKER}:(\d+):/.match(e.message)
    line_num = matches.nil? ? 0 : matches[1].to_i - 1 # Line numbers from ruby are base 1
    # If we get a string that can't be cast to integer properly to_i returns 0, which we then take 1 from
    # which results in a negative number. As a simple precaution, anything that's negative, just assume line zero
    line_num = 0 if line_num < 0

    err = PuppetfileResolver::Puppetfile::Parser::ParserError.new(e.to_s)
    err.location = PuppetfileResolver::Puppetfile::DocumentLocation.new.tap do |doc_loc|
      doc_loc.start_line = line_num
      doc_loc.end_line = line_num
      # We can't get character position reliably
    end
    raise err, e.backtrace
  end

  # Post process magic comments
  post_process_flags!(document)

  # Freeze the flags so they can't be modified
  document.modules.each { |mod| mod.resolver_flags.freeze }

  document
end