Golang String.Has方法代码示例

func (m *DefaultRESTMapper) KindFor(resource unversioned.GroupVersionResource) (unversioned.GroupVersionKind, error) {
	kinds, err := m.KindsFor(resource)
	if err != nil {
		return unversioned.GroupVersionKind{}, err
	}

	// TODO for each group, choose the most preferred (first) version.  This keeps us consistent with code today.
	// eventually, we'll need a RESTMapper that is aware of what's available server-side and deconflicts that with
	// user preferences
	oneKindPerGroup := []unversioned.GroupVersionKind{}
	groupsAdded := sets.String{}
	for _, kind := range kinds {
		if groupsAdded.Has(kind.Group) {
			continue
		}

		oneKindPerGroup = append(oneKindPerGroup, kind)
		groupsAdded.Insert(kind.Group)
	}

	if len(oneKindPerGroup) == 1 {
		return oneKindPerGroup[0], nil
	}

	return unversioned.GroupVersionKind{}, fmt.Errorf("%v is ambiguous, got: %v", resource, kinds)
}

func (t *tcShaper) nextClassID() (int, error) {
	data, err := t.e.Command("tc", "class", "show", "dev", t.iface).CombinedOutput()
	if err != nil {
		return -1, err
	}

	scanner := bufio.NewScanner(bytes.NewBuffer(data))
	classes := sets.String{}
	for scanner.Scan() {
		line := strings.TrimSpace(scanner.Text())
		// skip empty lines
		if len(line) == 0 {
			continue
		}
		parts := strings.Split(line, " ")
		// expected tc line:
		// class htb 1:1 root prio 0 rate 1000Kbit ceil 1000Kbit burst 1600b cburst 1600b
		if len(parts) != 14 {
			return -1, fmt.Errorf("unexpected output from tc: %s (%v)", scanner.Text(), parts)
		}
		classes.Insert(parts[2])
	}

	// Make sure it doesn't go forever
	for nextClass := 1; nextClass < 10000; nextClass++ {
		if !classes.Has(fmt.Sprintf("1:%d", nextClass)) {
			return nextClass, nil
		}
	}
	// This should really never happen
	return -1, fmt.Errorf("exhausted class space, please try again")
}

func (g *conversionGenerator) RepackImports(exclude sets.String) {
	var packages []string
	for key := range g.imports {
		packages = append(packages, key)
	}
	sort.Strings(packages)
	g.imports = make(map[string]string)
	g.shortImports = make(map[string]string)
	g.targetPackage(g.targetPkg)
	for _, pkg := range packages {
		if !exclude.Has(pkg) {
			g.addImportByPath(pkg)
		}
	}
}

func ValidateThirdPartyResource(obj *extensions.ThirdPartyResource) field.ErrorList {
	allErrs := field.ErrorList{}
	allErrs = append(allErrs, apivalidation.ValidateObjectMeta(&obj.ObjectMeta, true, ValidateThirdPartyResourceName, field.NewPath("metadata"))...)

	versions := sets.String{}
	for ix := range obj.Versions {
		version := &obj.Versions[ix]
		if len(version.Name) == 0 {
			allErrs = append(allErrs, field.Invalid(field.NewPath("versions").Index(ix).Child("name"), version, "must not be empty"))
		}
		if versions.Has(version.Name) {
			allErrs = append(allErrs, field.Duplicate(field.NewPath("versions").Index(ix).Child("name"), version))
		}
		versions.Insert(version.Name)
	}
	return allErrs
}

func NewDefaultRESTMapper(defaultGroupVersions []unversioned.GroupVersion, interfacesFunc meta.VersionInterfacesFunc,
	importPathPrefix string, ignoredKinds, rootScoped sets.String) *meta.DefaultRESTMapper {

	mapper := meta.NewDefaultRESTMapper(defaultGroupVersions, interfacesFunc)
	// enumerate all supported versions, get the kinds, and register with the mapper how to address
	// our resources.
	for _, gv := range defaultGroupVersions {
		for kind, oType := range Scheme.KnownTypes(gv) {
			gvk := gv.WithKind(kind)
			// TODO: Remove import path prefix check.
			// We check the import path prefix because we currently stuff both "api" and "extensions" objects
			// into the same group within Scheme since Scheme has no notion of groups yet.
			if !strings.HasPrefix(oType.PkgPath(), importPathPrefix) || ignoredKinds.Has(kind) {
				continue
			}
			scope := meta.RESTScopeNamespace
			if rootScoped.Has(kind) {
				scope = meta.RESTScopeRoot
			}
			mapper.Add(gvk, scope, false)
		}
	}
	return mapper
}

// NegotiateVersion queries the server's supported api versions to find
// a version that both client and server support.
// - If no version is provided, try registered client versions in order of
//   preference.
// - If version is provided, but not default config (explicitly requested via
//   commandline flag), and is unsupported by the server, print a warning to
//   stderr and try client's registered versions in order of preference.
// - If version is config default, and the server does not support it,
//   return an error.
func NegotiateVersion(client *Client, c *Config, requestedGV *unversioned.GroupVersion, clientRegisteredGVs []unversioned.GroupVersion) (*unversioned.GroupVersion, error) {
	var err error
	if client == nil {
		client, err = New(c)
		if err != nil {
			return nil, err
		}
	}
	clientVersions := sets.String{}
	for _, gv := range clientRegisteredGVs {
		clientVersions.Insert(gv.String())
	}
	groups, err := client.ServerGroups()
	if err != nil {
		// This is almost always a connection error, and higher level code should treat this as a generic error,
		// not a negotiation specific error.
		return nil, err
	}
	versions := ExtractGroupVersions(groups)
	serverVersions := sets.String{}
	for _, v := range versions {
		serverVersions.Insert(v)
	}

	// If no version requested, use config version (may also be empty).
	// make a copy of the original so we don't risk mutating input here or in the returned value
	var preferredGV *unversioned.GroupVersion
	switch {
	case requestedGV != nil:
		t := *requestedGV
		preferredGV = &t
	case c.GroupVersion != nil:
		t := *c.GroupVersion
		preferredGV = &t
	}

	// If version explicitly requested verify that both client and server support it.
	// If server does not support warn, but try to negotiate a lower version.
	if preferredGV != nil {
		if !clientVersions.Has(preferredGV.String()) {
			return nil, fmt.Errorf("client does not support API version %q; client supported API versions: %v", preferredGV, clientVersions)

		}
		if serverVersions.Has(preferredGV.String()) {
			return preferredGV, nil
		}
		// If we are using an explicit config version the server does not support, fail.
		if (c.GroupVersion != nil) && (*preferredGV == *c.GroupVersion) {
			return nil, fmt.Errorf("server does not support API version %q", preferredGV)
		}
	}

	for _, clientGV := range clientRegisteredGVs {
		if serverVersions.Has(clientGV.String()) {
			// Version was not explicitly requested in command config (--api-version).
			// Ok to fall back to a supported version with a warning.
			// TODO: caesarxuchao: enable the warning message when we have
			// proper fix. Please refer to issue #14895.
			// if len(version) != 0 {
			// 	glog.Warningf("Server does not support API version '%s'. Falling back to '%s'.", version, clientVersion)
			// }
			t := clientGV
			return &t, nil
		}
	}
	return nil, fmt.Errorf("failed to negotiate an api version; server supports: %v, client supports: %v",
		serverVersions, clientVersions)
}