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util.go
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/
util.go
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package apidocs
import (
"reflect"
"regexp"
"sort"
"strings"
"unicode"
"github.com/go-openapi/spec"
"k8s.io/apimachinery/pkg/runtime/schema"
)
// RefType returns the type name of a reference, suitable for looking up in
// s.Definitions.
func RefType(s *spec.Schema) string {
return strings.TrimPrefix(s.Ref.String(), "#/definitions/")
}
// FriendlyTypeName returns a user-friendly type name.
func FriendlyTypeName(s *spec.Schema) string {
refType := RefType(s)
if refType == "" { // a base type, e.g. "string"
return s.Type[0]
}
// convert, e.g. "io.k8s.kubernetes.pkg.api.v1.Pod" -> "v1.Pod"
parts := strings.Split(refType, ".")
return strings.Join(parts[len(parts)-2:], ".")
}
// EscapeMediaTypes ensures that */* renders correctly in asciidoc format.
// TODO: it'd be better if the template library could escape correctly for
// asciidoc.
func EscapeMediaTypes(mediatypes []string) []string {
rv := make([]string, len(mediatypes))
for i, mediatype := range mediatypes {
rv[i] = mediatype
if mediatype == "*/*" {
rv[i] = `\*/*`
}
}
return rv
}
// GroupVersionKinds returns the GroupVersionKinds from the
// "x-kubernetes-group-version-kind" OpenAPI extension.
func GroupVersionKinds(s spec.Schema) []schema.GroupVersionKind {
e := s.Extensions["x-kubernetes-group-version-kind"]
if e == nil {
return nil
}
gvks := make([]schema.GroupVersionKind, 0, len(e.([]interface{})))
for _, gvk := range e.([]interface{}) {
gvk := gvk.(map[string]interface{})
gvks = append(gvks, schema.GroupVersionKind{
Group: gvk["group"].(string),
Version: gvk["version"].(string),
Kind: gvk["kind"].(string),
})
}
return gvks
}
var opNames = []string{"Get", "Put", "Post", "Delete", "Options", "Head", "Patch"}
// Operations returns the populated operations of a spec.PathItem as a map, for
// easier iteration
func Operations(path spec.PathItem) map[string]*spec.Operation {
ops := make(map[string]*spec.Operation, len(opNames))
v := reflect.ValueOf(path)
for _, opName := range opNames {
op := v.FieldByName(opName).Interface().(*spec.Operation)
if op != nil {
ops[opName] = op
}
}
return ops
}
var envStyleRegexp = regexp.MustCompile(`\{[^}]+\}`)
// EnvStyle replaces instances of {foo} in a string with $FOO.
func EnvStyle(s string) string {
return envStyleRegexp.ReplaceAllStringFunc(s, func(s string) string {
return "$" + strings.ToUpper(s[1:len(s)-1])
})
}
var alreadyPluralSuffixes = []string{"versions", "constraints", "endpoints"}
// Pluralise dumbly attempts to pluralise s.
func Pluralise(s string) string {
l := strings.ToLower(s)
for _, ss := range alreadyPluralSuffixes {
if strings.HasSuffix(l, ss) {
return s
}
}
if strings.HasSuffix(s, "s") {
return s + "es"
}
if strings.HasSuffix(s, "y") {
return s[:len(s)-1] + "ies"
}
return s + "s"
}
// SortedKeys returns a slice containing the sorted keys of map m. Argument t
// is the type implementing sort.Interface which is used to sort.
func SortedKeys(m interface{}, t reflect.Type) interface{} {
v := reflect.ValueOf(m)
if v.Kind() != reflect.Map {
panic("wrong type")
}
s := reflect.MakeSlice(reflect.SliceOf(v.Type().Key()), v.Len(), v.Len())
for i, k := range v.MapKeys() {
s.Index(i).Set(k)
}
s = s.Convert(t)
sort.Sort(s.Interface().(sort.Interface))
return s.Interface()
}
// ToUpper returns s with the first letter capitalised.
func ToUpper(s string) string {
r := []rune(s)
r[0] = unicode.ToUpper(r[0])
return string(r)
}
// ReverseStringSlice returns s reversed, not in place.
func ReverseStringSlice(s []string) []string {
r := make([]string, len(s))
for i := range s {
r[len(r)-1-i] = s[i]
}
return r
}