func newMetaParser(swspec *spec.Swagger) *sectionedParser {
	sp := new(sectionedParser)
	if swspec.Info == nil {
		swspec.Info = new(spec.Info)
	}
	info := swspec.Info
	sp.setTitle = func(lines []string) {
		tosave := joinDropLast(lines)
		if len(tosave) > 0 {
			tosave = rxStripTitleComments.ReplaceAllString(tosave, "")
		}
		info.Title = tosave
	}
	sp.setDescription = func(lines []string) { info.Description = joinDropLast(lines) }
	sp.taggers = []tagParser{
		newMultiLineTagParser("TOS", newMultilineDropEmptyParser(rxTOS, metaTOSSetter(info))),
		newMultiLineTagParser("Consumes", newMultilineDropEmptyParser(rxConsumes, metaConsumesSetter(swspec))),
		newMultiLineTagParser("Produces", newMultilineDropEmptyParser(rxProduces, metaProducesSetter(swspec))),
		newSingleLineTagParser("Schemes", newSetSchemes(metaSchemeSetter(swspec))),
		newSingleLineTagParser("SecurityDefinitions", newSetSecurityDefinitions(rxSecurity, metaSecuritySetter(swspec))),
		newSingleLineTagParser("Version", &setMetaSingle{swspec, rxVersion, setInfoVersion}),
		newSingleLineTagParser("Host", &setMetaSingle{swspec, rxHost, setSwaggerHost}),
		newSingleLineTagParser("BasePath", &setMetaSingle{swspec, rxBasePath, setSwaggerBasePath}),
		newSingleLineTagParser("Contact", &setMetaSingle{swspec, rxContact, setInfoContact}),
		newSingleLineTagParser("License", &setMetaSingle{swspec, rxLicense, setInfoLicense}),
	}
	return sp
}

func setSwaggerBasePath(swspec *spec.Swagger, lines []string) error {
	var ln string
	if len(lines) > 0 {
		ln = lines[0]
	}
	swspec.BasePath = ln
	return nil
}

func setSwaggerHost(swspec *spec.Swagger, lines []string) error {
	lns := lines
	if len(lns) == 0 || (len(lines) == 1 && len(lines[0]) == 0) {
		lns = []string{"localhost"}
	}
	swspec.Host = lns[0]
	return nil
}

func TestGenerateSwaggerYAML(t *testing.T) {
	seed := spec.Swagger{}
	seed.Host = "testapi.my"
	seed.Produces = []string{"application/json"}
	seed.Consumes = []string{"application/json"}
	seed.Schemes = []string{"http"}
	seed.Info = &spec.Info{}
	seed.Info.Description = "Our very little example API with 2 endpoints"
	seed.Info.Title = "Example API"
	seed.Info.Version = "0.1"
	seed.BasePath = "/"

	generator := NewSwaggerGeneratorYAML(seed)
	tests := getTests()

	doc, err := generator.Generate(tests)
	assert.NoError(t, err, "could not generate docs")

	// checking validity of generated swagger doc
	yamlMap := map[interface{}]interface{}{}
	err = yaml.Unmarshal(doc, &yamlMap)
	assert.NoError(t, err, "could not unmarshal generated doc into map")

	rawJSON, err := fmts.YAMLToJSON(yamlMap)
	assert.NoError(t, err)

	swaggerDoc, err := loads.Analyzed(rawJSON, "")
	assert.NoError(t, err)

	err = validate.Spec(swaggerDoc, strfmt.Default)
	assert.NoError(t, err)

	// checking equality of generated and expected doc
	actual := map[interface{}]interface{}{}
	err = yaml.Unmarshal(doc, &actual)
	assert.NoError(t, err, "could not unmarshal generated doc into map")

	fixture, err := ioutil.ReadFile("fixtures/swagger/swagger.yml")
	assert.NoError(t, err, "could not read fixture file")

	expected := map[interface{}]interface{}{}
	err = yaml.Unmarshal(fixture, &expected)
	assert.NoError(t, err, "could not unmarshal fixture into map")

	assert.Equal(t, expected, actual)
}

func generateSwaggerYAML(t *testing.T, tests []apitest.IApiTest, writer io.Writer) {
	seed := spec.Swagger{}
	seed.Host = "localhost"
	seed.Produces = []string{"application/json"}
	seed.Consumes = []string{"application/json"}
	seed.Schemes = []string{"http"}
	seed.Info = &spec.Info{}
	seed.Info.Description = "Example API"
	seed.Info.Title = "Example API"
	seed.Info.Version = "0.1"
	seed.BasePath = "/"

	generator := apitest.NewSwaggerGeneratorYAML(seed)

	doc, err := generator.Generate(tests)
	if err != nil {
		t.Fatalf("could not generate doc: %s", err.Error())
	}

	fmt.Fprint(writer, string(doc))
}

// Execute this command
func (s *Spec) Execute(args []string) error {
	targetPath := "."
	if len(args) > 0 {
		targetPath = args[0]
	}
	realPath, err := filepath.Abs(targetPath)
	if err != nil {
		return err
	}
	var file *os.File
	switch s.Format {
	case "json":
		file, err = os.Create(filepath.Join(realPath, "swagger.json"))
		if err != nil {
			return err
		}
	case "yaml", "yml":
		file, err = os.Create(filepath.Join(realPath, "swagger.yml"))
		if err != nil {
			return err
		}
	default:
		return fmt.Errorf("invalid format: %s", s.Format)
	}
	defer file.Close()
	log.Println("creating specification document in", filepath.Join(targetPath, file.Name()))

	var doc spec.Swagger
	info := new(spec.Info)
	doc.Info = info

	doc.Swagger = "2.0"
	doc.Paths = new(spec.Paths)
	doc.Definitions = make(spec.Definitions)

	info.Title = s.Title
	if info.Title == "" {
		info.Title = swag.ToHumanNameTitle(filepath.Base(realPath))
	}
	info.Description = s.Description
	info.Version = s.Version
	info.TermsOfService = s.Terms
	if s.Contact.Name != "" || s.Contact.Email != "" || s.Contact.URL != "" {
		var contact spec.ContactInfo
		contact.Name = s.Contact.Name
		contact.Email = s.Contact.Email
		contact.URL = s.Contact.URL
		info.Contact = &contact
	}
	if s.License.Name != "" || s.License.URL != "" {
		var license spec.License
		license.Name = s.License.Name
		license.URL = s.License.URL
		info.License = &license
	}

	for _, cons := range s.Consumes {
		doc.Consumes = append(doc.Consumes, cons)
	}
	for _, prods := range s.Produces {
		doc.Produces = append(doc.Produces, prods)
	}
	for _, scheme := range s.Schemes {
		doc.Schemes = append(doc.Schemes, scheme)
	}

	if s.Format == "json" {
		enc := json.NewEncoder(file)
		if err := enc.Encode(doc); err != nil {
			return err
		}
		return nil
	}

	b, err := yaml.Marshal(swag.ToDynamicJSON(doc))
	if err != nil {
		return err
	}
	if _, err := file.Write(b); err != nil {
		return err
	}
	return nil
}

func metaSecuritySetter(meta *spec.Swagger) func([]map[string][]string) {
	return func(secDefs []map[string][]string) { meta.Security = secDefs }
}

func metaSchemeSetter(meta *spec.Swagger) func([]string) {
	return func(schemes []string) { meta.Schemes = schemes }
}

func metaProducesSetter(meta *spec.Swagger) func([]string) {
	return func(produces []string) { meta.Produces = produces }
}

func metaConsumesSetter(meta *spec.Swagger) func([]string) {
	return func(consumes []string) { meta.Consumes = consumes }
}

func safeInfo(swspec *spec.Swagger) *spec.Info {
	if swspec.Info == nil {
		swspec.Info = new(spec.Info)
	}
	return swspec.Info
}