module MavenDependency

# File lib/maven_dependency.rb, line 37
def pom(*args)
  pom_(*args_opts(args))
end

# File lib/maven_dependency.rb, line 12
def resolve(*args)
  args, opts = args_opts args

  pom, dep = 2.times.map { Tempfile.new('maven_dependency') }
  redirection = opts[:verbose] ? '' : '> /dev/null'
  begin
    pom << pom_(args, opts)
    pom.close
    dep.close
    system(%[mvn
      org.apache.maven.plugins:maven-dependency-plugin:build-classpath
      -Dsilent=true -Dmdep.outputFile=#{dep.path} -f #{pom.path}
      #{redirection}
    ].gsub($/, ' '))
    unless (x = $?.exitstatus) == 0
      raise RuntimeError, "mvn: exit status #{x}"
    end

    File.read(dep).split(':')
  ensure
    pom.unlink
    dep.unlink
  end
end

# File lib/maven_dependency.rb, line 42
def args_opts args
  args = args.dup
  opts = DEFAULT_OPTIONS.merge(args.last.is_a?(Hash) ? args.pop : {})
  [args, opts]
end

# File lib/maven_dependency.rb, line 48
def pom_ args, opts
  @template ||= File.read(
    File.expand_path('../maven_dependency/template.xml.erb', __FILE__))

  _specs = args.map { |spec|
    g, a, v, x = spec.split(/[\@\/:]/)
    if x || a.nil? || v.nil?
      raise ArgumentError, "invalid dependency format: #{spec}"
    end
    [g, a, v]
  }
  _repos = opts[:repositories]
  ERB.new(@template).result(binding)
end