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client_generator.go
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client_generator.go
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package generator
import (
"go/ast"
"sort"
"strconv"
"strings"
log "github.com/sirupsen/logrus"
"github.com/vmware-tanzu/graph-framework-for-microservices/compiler/pkg/parser"
"github.com/vmware-tanzu/graph-framework-for-microservices/compiler/pkg/util"
)
func generateNexusClientVars(baseGroupName, crdModulePath string, pkgs parser.Packages, parentsMap map[string]parser.NodeHelper) (clientVars, error) {
var vars clientVars
vars.BaseClientsetImport = `"` + crdModulePath + `client/clientset/versioned"`
vars.FakeBaseCliensetImport = `"` + crdModulePath + `client/clientset/versioned/fake"`
vars.CommonImport = util.GetInternalImport(crdModulePath, "common")
vars.HelperImport = util.GetInternalImport(crdModulePath, "helper")
sortedKeys := make([]string, 0, len(pkgs))
for k := range pkgs {
sortedKeys = append(sortedKeys, k)
}
sort.Strings(sortedKeys)
sortedPackages := make([]parser.Package, len(pkgs))
for i, k := range sortedKeys {
sortedPackages[i] = pkgs[k]
}
for _, pkg := range sortedPackages {
if len(pkg.GetNexusNodes()) > 0 {
var groupVars ApiGroupsVars
// TODO make version configurable
version := "v1"
importPath := util.GetImportPath(pkg.Name, baseGroupName, version)
baseImportName := util.GetBaseImportName(pkg.Name, baseGroupName, version)
informerImportName := util.GetInformerImportName(pkg.Name, baseGroupName, version)
vars.BaseImports += baseImportName + ` "` + crdModulePath + "apis/" + importPath + `"` +
"\n" // eg baseroothelloworldv1 "helloworld/nexus/generated/apis/root.helloworld.com/v1"
vars.InformerImports += informerImportName + ` "` + crdModulePath + "client/informers/externalversions/" + importPath + `"` +
"\n" // eg informerroothelloworldv1 "helloworld/nexus/generated/client/informers/externalversions/root.helloworld.com/v1"
groupVarName := util.GetGroupVarName(pkg.Name, baseGroupName, version)
groupTypeName := util.GetGroupTypeName(pkg.Name, baseGroupName, version)
simpleGroupTypeName := util.GetSimpleGroupTypeName(pkg.Name)
groupVars.SimpleGroupTypeName = simpleGroupTypeName
groupVars.ClientsetApiGroups = groupVarName + " *" + groupTypeName + "\n" // eg rootHelloworldV1 *RootHelloworldV1
initClient := "client." + groupVarName + " = new" + groupTypeName +
"(client)\n" // eg client.rootHelloworldV1 = newRootHelloworldV1(client)
groupVars.InitApiGroups = initClient
clientsetMethod := "func (c *Clientset) " + simpleGroupTypeName + "() *" + groupTypeName + " {\n" + "return c." +
groupVarName + "\n}\n" // eg
// func (c *Clientset) Root() *ootHelloworldV1 {
// return c.rootHelloworldV1
// }
groupVars.ClientsetsApiGroupMethods = clientsetMethod
groupVars.GroupTypeName = groupTypeName
for _, node := range pkg.GetNexusNodes() {
var clientGroupVars apiGroupsClientVars
clientGroupVars.ApiGroupsVars = groupVars
clientGroupVars.GroupTypeName = groupTypeName
clientGroupVars.CrdName = util.GetCrdName(node.Name.String(), pkg.Name, baseGroupName)
err := resolveNode(baseImportName, informerImportName, pkg, pkgs, baseGroupName, version, &clientGroupVars, node, parentsMap)
if err != nil {
return clientVars{}, err
}
vars.Nodes = append(vars.Nodes, clientGroupVars)
}
vars.ApiGroups = append(vars.ApiGroups, groupVars)
}
}
return vars, nil
}
func resolveNode(baseImportName, informerImportName string, pkg parser.Package, allPkgs parser.Packages, baseGroupName, version string,
clientGroupVars *apiGroupsClientVars, node *ast.TypeSpec, parentsMap map[string]parser.NodeHelper) error {
pkgName := pkg.Name
baseNodeName := node.Name.Name // eg Root
groupResourceNameTitle := util.GetGroupResourceNameTitle(baseNodeName)
groupResourceType := util.GetGroupResourceType(baseNodeName, pkgName, baseGroupName, version)
clientGroupVars.BaseNodeName = baseNodeName
clientGroupVars.BaseImportName = baseImportName
clientGroupVars.IsSingleton = parser.IsSingletonNode(node)
clientGroupVars.GroupBaseImport = baseImportName + "." + baseNodeName
clientGroupVars.GroupInformerImport = informerImportName
clientGroupVars.GroupResourceType = groupResourceType
clientGroupVars.GroupResourceNameTitle = groupResourceNameTitle
//Get user defined status field if present
statusField := parser.GetStatusField(node)
if statusField != nil {
clientGroupVars.HasStatus = true
clientGroupVars.StatusType = parser.GetFieldType(statusField)
statusName, err := parser.GetFieldName(statusField)
if err != nil {
log.Fatalf("failed to determine field name: %v", err)
}
if statusName == "" {
log.Fatalf("name of the user defined status field in nexus node can't be empty")
}
clientGroupVars.StatusName = statusName
clientGroupVars.StatusNameFirstLower = util.GetTag(statusName)
} else {
clientGroupVars.HasStatus = false
}
// TODO support resolution of links which are not nexus nodes https://jira.eng.vmware.com/browse/NPT-112
children := parser.GetChildFields(node)
childrenAndLinks := children
childrenAndLinks = append(childrenAndLinks, parser.GetLinkFields(node)...)
if len(children) > 0 {
clientGroupVars.HasChildren = true
}
for _, link := range childrenAndLinks {
linkInfo := getFieldInfo(pkg, allPkgs, link)
clientVarsLink := apiGroupsClientVarsLink{
FieldName: linkInfo.fieldName,
FieldNameGvk: util.GetGvkFieldTagName(linkInfo.fieldName),
Group: util.GetGroupName(linkInfo.pkgName, baseGroupName),
Kind: linkInfo.fieldType,
GroupBaseImport: util.GetBaseImportName(linkInfo.pkgName, baseGroupName, version) + "." + linkInfo.fieldType,
GroupResourceNameTitle: util.GetGroupResourceNameTitle(linkInfo.fieldType),
GroupTypeName: util.GetGroupTypeName(linkInfo.pkgName, baseGroupName, version),
SimpleGroupTypeName: util.GetSimpleGroupTypeName(linkInfo.pkgName),
BaseNodeName: linkInfo.fieldType,
GroupResourceType: util.GetGroupResourceType(linkInfo.fieldType, linkInfo.pkgName, baseGroupName, version),
CrdName: util.GetCrdName(linkInfo.fieldType, linkInfo.pkgName, baseGroupName),
IsSingleton: isChildSingleton(pkg, allPkgs, link),
}
if parser.IsNamedChildOrLink(link) {
clientVarsLink.IsNamed = true
} else {
clientVarsLink.IsNamed = false
}
if parser.IsLinkField(link) {
clientGroupVars.Links = append(clientGroupVars.Links, clientVarsLink)
} else {
clientGroupVars.Children = append(clientGroupVars.Children, clientVarsLink)
}
clientGroupVars.LinksAndChildren = append(clientGroupVars.LinksAndChildren, clientVarsLink)
}
for _, f := range parser.GetSpecFields(node) {
fieldInfo := getFieldInfo(pkg, allPkgs, f)
var vars apiGroupsClientVarsLink
vars.FieldName = fieldInfo.fieldName
vars.FieldNameTag = parser.GetFieldNameJsonTag(f)
if vars.FieldNameTag == "" {
vars.FieldNameTag = util.GetTag(fieldInfo.fieldName)
}
clientGroupVars.Fields = append(clientGroupVars.Fields, vars)
}
nodeHelper := parentsMap[clientGroupVars.CrdName]
clientGroupVars.Group = util.GetGroupFromCrdName(clientGroupVars.CrdName)
clientGroupVars.Kind = nodeHelper.Name
if len(nodeHelper.Parents) > 0 {
parentCrdName := nodeHelper.Parents[len(nodeHelper.Parents)-1]
parentHelper := parentsMap[parentCrdName]
clientGroupVars.Parent.HasParent = true
clientGroupVars.Parent.IsNamed = parentHelper.Children[clientGroupVars.CrdName].IsNamed
clientGroupVars.Parent.CrdName = parentCrdName
clientGroupVars.Parent.GroupTypeName = util.GetGroupTypeName(
util.GetPackageNameFromCrdName(parentCrdName), baseGroupName, version)
clientGroupVars.Parent.SimpleGroupTypeName = util.GetSimpleGroupTypeName(util.GetPackageNameFromCrdName(parentCrdName))
clientGroupVars.Parent.GroupResourceNameTitle = util.GetGroupResourceNameTitle(parentHelper.Name)
clientGroupVars.Parent.GvkFieldName = parentHelper.Children[clientGroupVars.CrdName].FieldNameGvk
clientGroupVars.Parent.GoGvkFieldName = parentHelper.Children[clientGroupVars.CrdName].GoFieldNameGvk
clientGroupVars.Parent.BaseNodeName = parentHelper.Name
}
return nil
}
type fieldInfo struct {
pkgName string
fieldName string
fieldType string
}
func isChildSingleton(pkg parser.Package, allPkgs parser.Packages, f *ast.Field) bool {
chType := parser.GetFieldType(f)
split := strings.Split(chType, ".")
if len(split) > 1 { // imported node
fieldPackageName := split[0]
for _, imp := range pkg.GetImports() { // go through imports to find matching package
var packageNameToCheck string
if imp.Name != nil { // named import
packageNameToCheck = imp.Name.String()
} else {
unquotedImport, err := strconv.Unquote(imp.Path.Value)
if err != nil {
continue
}
spl := strings.Split(unquotedImport, "/")
packageNameToCheck = spl[len(spl)-1]
}
if fieldPackageName == packageNameToCheck {
unquotedImport, err := strconv.Unquote(imp.Path.Value)
if err != nil {
continue
}
for _, p := range allPkgs {
if unquotedImport == p.FullName {
for _, node := range p.GetNexusNodes() {
if parser.GetTypeName(node) == split[1] {
return parser.IsSingletonNode(node) // we found node definition, check if it's singleton
}
}
}
}
}
}
} else { // node from same package
for _, node := range pkg.GetNexusNodes() {
if parser.GetTypeName(node) == chType {
return parser.IsSingletonNode(node)
}
}
}
return false
}
func getFieldInfo(pkg parser.Package, allPkgs parser.Packages, f *ast.Field) fieldInfo {
var info fieldInfo
var err error
info.fieldName, err = parser.GetNodeFieldName(f)
if err != nil {
log.Fatalf("Failed to get name of field: %v", err)
}
currentPkgName := pkg.Name
chType := parser.GetFieldType(f)
s := strings.Split(chType, ".")
info.fieldType = s[len(s)-1]
split := strings.Split(chType, ".")
// overwrite pkg name of links or children from different packages
if len(split) > 1 {
info.pkgName = split[0]
// overwrite pkg name for node which uses named import like 'sg "helloworld.com/service-groups"'
for _, imp := range pkg.GetImports() {
if imp.Name.String() == info.pkgName {
// look for import matching package
for _, p := range allPkgs {
unquotedImport, err := strconv.Unquote(imp.Path.Value)
if err != nil {
continue
}
if unquotedImport == p.FullName {
info.pkgName = p.Name
break
}
}
}
}
info.pkgName = util.RemoveSpecialChars(info.pkgName)
} else {
info.pkgName = util.RemoveSpecialChars(currentPkgName)
}
return info
}
type ApiGroupsVars struct {
InitApiGroups string
ClientsetApiGroups string
ClientsetsApiGroupMethods string
SimpleGroupTypeName string
GroupTypeName string
GroupResourcesInit string
GroupResources string
GroupResourcesDefs string
}
type apiGroupsClientVars struct {
ApiGroupsVars
BaseNodeName string
CrdName string
IsSingleton bool
HasChildren bool
HasStatus bool
StatusName string
StatusNameFirstLower string
StatusType string
BaseImportName string
GroupResourceType string
GroupResourceNameTitle string
GroupBaseImport string
GroupInformerImport string
Group string
Kind string
Parent struct {
IsNamed bool
HasParent bool
CrdName string
GvkFieldName string
GoGvkFieldName string
GroupTypeName string
SimpleGroupTypeName string
GroupResourceNameTitle string
BaseNodeName string
}
Links []apiGroupsClientVarsLink
Children []apiGroupsClientVarsLink
LinksAndChildren []apiGroupsClientVarsLink
Fields []apiGroupsClientVarsLink
}
type apiGroupsClientVarsLink struct {
FieldName string
FieldNameTag string
FieldNameGvk string
Group string
Kind string
GroupBaseImport string
BaseNodeName string
IsNamed bool
IsSingleton bool
GroupTypeName string
SimpleGroupTypeName string
GroupResourceNameTitle string
GroupResourceType string
CrdName string
}