/
template_renderers.go
738 lines (630 loc) · 19.3 KB
/
template_renderers.go
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package generator
import (
"bytes"
_ "embed"
"encoding/json"
"fmt"
"go/format"
"go/printer"
"go/token"
"os"
"sort"
"strings"
"text/template"
log "github.com/sirupsen/logrus"
"github.com/vmware-tanzu/graph-framework-for-microservices/nexus/nexus"
"golang.org/x/text/cases"
"golang.org/x/text/language"
"golang.org/x/tools/imports"
"github.com/vmware-tanzu/graph-framework-for-microservices/compiler/pkg/parser"
"github.com/vmware-tanzu/graph-framework-for-microservices/compiler/pkg/parser/rest"
"github.com/vmware-tanzu/graph-framework-for-microservices/compiler/pkg/util"
)
//go:embed template/doc.go.tmpl
var docTemplateFile []byte
//go:embed template/register_group.go.tmpl
var registerGroupTemplateFile []byte
//go:embed template/register_crd.go.tmpl
var registerCRDTemplateFile []byte
//go:embed template/types.go.tmpl
var typesTemplateFile []byte
//go:embed template/crd_base.yaml.tmpl
var crdBaseTemplateFile []byte
//go:embed template/helper.go.tmpl
var helperTemplateFile []byte
//go:embed template/client.go.tmpl
var clientTemplateFile []byte
//go:embed template/graphql/schema.graphqls.tmpl
var graphqlSchemaTemplateFile []byte
//go:embed template/graphql/gqlgen.yml.tmpl
var gqlgenconfigTemplateFile []byte
//go:embed template/graphql/graphqlResolver.go.tmpl
var graphqlResolverTemplateFile []byte
//go:embed template/graphql/server.go.tmpl
var gqlserverTemplateFile []byte
//go:embed template/tsm-graphql/schema.graphqls.tmpl
var tsmGraphqlSchemaTemplateFile []byte
//go:embed template/model.go.tmpl
var modelTemplateFile []byte
func RenderCRDTemplate(baseGroupName, crdModulePath string,
pkgs parser.Packages, graph map[string]parser.Node,
outputDir string, httpMethods map[string]nexus.HTTPMethodsResponses,
httpCodes map[string]nexus.HTTPCodesResponse, nonNexusTypes *parser.NonNexusTypes,
fileset *token.FileSet, graphqlFiles map[string]string) error {
parentsMap := parser.CreateParentsMap(graph)
pkgNames := make([]string, len(pkgs))
i := 0
for _, pkg := range pkgs {
groupName := pkg.Name + "." + baseGroupName
pkgNames[i] = groupName + ":v1"
i++
groupFolder := outputDir + "/apis/" + groupName
crdFolder := outputDir + "/crds"
apiFolder := groupFolder + "/v1"
var err error
err = createFolder(apiFolder)
if err != nil {
return err
}
file, err := RenderDocTemplate(baseGroupName, pkg)
if err != nil {
return err
}
log.Debugf("Rendered doc template for package %s: %s", pkg.Name, file)
err = createFile(apiFolder, "doc.go", file, true)
if err != nil {
return err
}
file, err = RenderRegisterGroupTemplate(baseGroupName, pkg)
if err != nil {
return err
}
log.Debugf("Rendered register group template for package %s: %s", pkg.Name, file)
err = createFile(groupFolder, "register.go", file, true)
if err != nil {
return err
}
file, err = RenderRegisterCRDTemplate(crdModulePath, baseGroupName, pkg)
if err != nil {
return err
}
log.Debugf("Rendered register CRD template for package %s: %s", pkg.Name, file)
err = createFile(apiFolder, "register.go", file, true)
if err != nil {
return err
}
file, err = RenderTypesTemplate(crdModulePath, pkg)
if err != nil {
return err
}
log.Debugf("Rendered types template for package %s: %s", pkg.Name, file)
err = createFile(apiFolder, "types.go", file, true)
if err != nil {
return err
}
crdFiles, err := RenderCRDBaseTemplate(baseGroupName, pkg, parentsMap, httpMethods, httpCodes)
if err != nil {
return err
}
for _, f := range crdFiles {
log.Debugf("Rendered crd base template for package %s: %s", pkg.Name, f.File)
err = createFile(crdFolder, f.Name, f.File, false)
if err != nil {
return err
}
}
}
err := RenderHelper(parentsMap, outputDir, crdModulePath)
if err != nil {
return err
}
err = RenderClient(baseGroupName, outputDir, crdModulePath, pkgs, parentsMap)
if err != nil {
return err
}
err = createApiNamesFile(pkgNames, outputDir)
if err != nil {
return err
}
err = RenderGraphQL(baseGroupName, outputDir, crdModulePath, pkgs, parentsMap, graphqlFiles, nonNexusTypes)
if err != nil {
return err
}
err = RenderGqlserver(outputDir, crdModulePath)
if err != nil {
return err
}
err = RenderNonNexusTypes(outputDir, nonNexusTypes, fileset)
if err != nil {
return err
}
return nil
}
func RenderHelper(parentsMap map[string]parser.NodeHelper, outputDir string, crdModulePath string) error {
helperFolder := outputDir + "/helper"
var err error
err = createFolder(helperFolder)
if err != nil {
return err
}
file, err := RenderHelperTemplate(parentsMap, crdModulePath)
if err != nil {
return err
}
log.Debugf("Rendered helper: %s", file)
err = createFile(helperFolder, "helper.go", file, true)
if err != nil {
return err
}
return nil
}
func createFolder(name string) error {
err := os.MkdirAll(name, os.ModeDir|os.ModePerm)
if err != nil {
return fmt.Errorf("creating dir %v failed with an error: %v", name, err)
}
return nil
}
func createFile(dirName string, fileName string, file *bytes.Buffer, formatFile bool) error {
var err error
formatted := file.Bytes()
if formatFile {
formatted, err = format.Source(file.Bytes())
if err != nil {
return err
}
}
err = os.WriteFile(dirName+"/"+fileName, formatted, 0644)
if err != nil {
return err
}
return nil
}
func readTemplateFile(rawTemplate []byte) (*template.Template, error) {
return template.New("tmpl").Parse(string(rawTemplate))
}
func renderTemplate(tmpl *template.Template, data interface{}) (*bytes.Buffer, error) {
if tmpl == nil {
return nil, fmt.Errorf("template can not be nil")
}
b := bytes.Buffer{}
if err := tmpl.Execute(&b, data); err != nil {
log.Errorf("Template resolve failed with error %v. Vars: %+v", err, data)
return nil, fmt.Errorf("cannot resolve template: %v", err)
}
return &b, nil
}
type docVars struct {
GroupName string
GroupGoName string
Version string
}
func RenderDocTemplate(baseGroupName string, pkg parser.Package) (*bytes.Buffer, error) {
groupGoName := util.GetSimpleGroupTypeName(pkg.Name) + util.GetGroupGoName(baseGroupName)
vars := docVars{
// TODO make it configurable
Version: "v1",
GroupName: pkg.Name + "." + baseGroupName,
GroupGoName: groupGoName,
}
if vars.GroupGoName == "" || vars.GroupName == "" {
return nil, fmt.Errorf("failed to determine group name of package")
}
docTemplate, err := readTemplateFile(docTemplateFile)
if err != nil {
return nil, err
}
return renderTemplate(docTemplate, vars)
}
type registerGroupVars struct {
GroupName string
PackageName string
}
func RenderRegisterGroupTemplate(baseGroupName string, pkg parser.Package) (*bytes.Buffer, error) {
groupName := pkg.Name + "." + baseGroupName
vars := registerGroupVars{
GroupName: groupName,
PackageName: util.GetPackageName(groupName),
}
if vars.PackageName == "" || vars.GroupName == "" {
return nil, fmt.Errorf("failed to determine group name of package")
}
registerGroupTemplate, err := readTemplateFile(registerGroupTemplateFile)
if err != nil {
return nil, err
}
return renderTemplate(registerGroupTemplate, vars)
}
type registerCRDVars struct {
GroupPackageName string
GroupPackageImport string
ResourceVersion string
KnownTypes string
}
func RenderRegisterCRDTemplate(crdModulePath, baseGroupName string, pkg parser.Package) (*bytes.Buffer, error) {
var knownTypes string
for _, node := range pkg.GetNexusNodes() {
knownTypes += "\t\t&" + parser.GetTypeName(node) + "{},\n\t\t&" + parser.GetTypeName(node) + "List{},\n"
}
groupName := pkg.Name + "." + baseGroupName
vars := registerCRDVars{
GroupPackageName: util.GetPackageName(groupName),
GroupPackageImport: crdModulePath + "apis/" + groupName,
// TODO make configurable by some variable in package
ResourceVersion: "v1",
KnownTypes: knownTypes,
}
if vars.GroupPackageName == "" ||
vars.GroupPackageImport == "" ||
vars.ResourceVersion == "" {
return nil, fmt.Errorf("failed to determine required registerCRDVars")
}
registerCrdTemplate, err := readTemplateFile(registerCRDTemplateFile)
if err != nil {
return nil, err
}
return renderTemplate(registerCrdTemplate, vars)
}
type typesVars struct {
Imports string
CommonImport string
CRDTypes string
Structs string
Types string
Consts string
}
func RenderTypesTemplate(crdModulePath string, pkg parser.Package) (*bytes.Buffer, error) {
aliasNameMap := make(map[string]string)
var vars typesVars
vars.Imports = parsePackageImports(pkg, aliasNameMap)
vars.CRDTypes = parsePackageCRDs(pkg, aliasNameMap)
vars.Structs = parsePackageStructs(pkg, aliasNameMap)
vars.Types = parsePackageTypes(pkg)
vars.Consts = parsePackageConsts(pkg)
vars.CommonImport = util.GetInternalImport(crdModulePath, "common")
registerCrdTemplate, err := readTemplateFile(typesTemplateFile)
if err != nil {
return nil, err
}
tmpl, err := renderTemplate(registerCrdTemplate, vars)
if err != nil {
return nil, err
}
out, err := imports.Process("render.go", tmpl.Bytes(), nil)
if err != nil {
return nil, err
}
return bytes.NewBuffer(out), nil
}
type crdBaseVars struct {
CrdName string
GroupName string
Singular string
Plural string
Kind string
KindList string
ResourceVersion string
NexusAnnotation string
}
type NexusAnnotation struct {
Name string `json:"name,omitempty"`
Hierarchy []string `json:"hierarchy,omitempty"`
Children map[string]parser.NodeHelperChild `json:"children,omitempty"`
Links map[string]parser.NodeHelperChild `json:"links,omitempty"`
IsSingleton bool `json:"is_singleton"`
NexusRestAPIGen nexus.RestAPISpec `json:"nexus-rest-api-gen,omitempty"`
Description string `json:"description,omitempty"`
}
type CrdBaseFile struct {
Name string
File *bytes.Buffer
}
func RenderCRDBaseTemplate(baseGroupName string, pkg parser.Package, parentsMap map[string]parser.NodeHelper,
httpMethods map[string]nexus.HTTPMethodsResponses, httpCodes map[string]nexus.HTTPCodesResponse) ([]CrdBaseFile, error) {
var crds []CrdBaseFile
restAPISpecMap := rest.GetRestApiSpecs(pkg, httpMethods, httpCodes, parentsMap)
for _, node := range pkg.GetNexusNodes() {
typeName := parser.GetTypeName(node)
groupName := pkg.Name + "." + baseGroupName
singular := strings.ToLower(typeName)
kind := cases.Title(language.Und, cases.NoLower).String(typeName)
plural := strings.ToLower(util.ToPlural(typeName))
crdName := fmt.Sprintf("%s.%s", plural, groupName)
nexusAnnotation := &NexusAnnotation{}
nexusAnnotation.IsSingleton = parser.IsSingletonNode(node)
var err error
parents, ok := parentsMap[crdName]
if ok {
nexusAnnotation.Hierarchy = parents.Parents
nexusAnnotation.Children = parents.Children
nexusAnnotation.Links = parents.Links
nexusAnnotation.Name = parents.RestName
}
if annotation, ok := parser.GetNexusRestAPIGenAnnotation(pkg, typeName); ok {
nexusAnnotation.NexusRestAPIGen = restAPISpecMap[annotation]
rest.ValidateRestApiSpec(restAPISpecMap[annotation], parentsMap, crdName)
}
if annotation, ok := parser.GetNexusDescriptionAnnotation(pkg, typeName); ok {
nexusAnnotation.Description = annotation
}
nexusAnnotationStr, err := json.Marshal(nexusAnnotation)
if err != nil {
return nil, err
}
vars := crdBaseVars{
CrdName: crdName,
GroupName: groupName,
Singular: singular,
Plural: plural,
Kind: kind,
KindList: fmt.Sprintf("%sList", kind),
NexusAnnotation: string(nexusAnnotationStr),
// TODO make configurable by some variable in package
ResourceVersion: "v1",
}
if vars.GroupName == "" ||
vars.Singular == "" ||
vars.Plural == "" ||
vars.Kind == "" ||
vars.KindList == "" ||
vars.ResourceVersion == "" {
return nil, fmt.Errorf("failed to determine required registerCRDVars")
}
registerCrdTemplate, err := readTemplateFile(crdBaseTemplateFile)
if err != nil {
return nil, err
}
file, err := renderTemplate(registerCrdTemplate, vars)
if err != nil {
return nil, err
}
crd := CrdBaseFile{
Name: pkg.Name + "_" + singular + ".yaml",
File: file,
}
crds = append(crds, crd)
}
return crds, nil
}
func createApiNamesFile(apiList []string, outputDir string) error {
sort.Strings(apiList)
apiNames := "API_NAMES=\""
for _, name := range apiList {
apiNames += name + " "
}
apiNames += "\""
var b bytes.Buffer
b.WriteString(apiNames)
return createFile(outputDir, "api_names.sh", &b, false)
}
type helperVars struct {
CrdModulePath string
GetCrdParentsMap string
GetObjectByCRDName string
}
func RenderHelperTemplate(parentsMap map[string]parser.NodeHelper, crdModulePath string) (*bytes.Buffer, error) {
keys := make([]string, 0, len(parentsMap))
for k := range parentsMap {
keys = append(keys, k)
}
sort.Strings(keys)
var vars helperVars
vars.CrdModulePath = strings.TrimSuffix(crdModulePath, "/")
vars.GetCrdParentsMap = generateGetCrdParentsMap(keys, parentsMap)
vars.GetObjectByCRDName = generateGetObjectByCRDName(keys, parentsMap)
helperTemplate, err := readTemplateFile(helperTemplateFile)
if err != nil {
return nil, err
}
tmpl, err := renderTemplate(helperTemplate, vars)
if err != nil {
return nil, err
}
out, err := imports.Process("render.go", tmpl.Bytes(), nil)
if err != nil {
return nil, err
}
return bytes.NewBuffer(out), nil
}
func RenderClient(baseGroupName, outputDir, crdModulePath string, pkgs parser.Packages, parentsMap map[string]parser.NodeHelper) error {
clientFolder := outputDir + "/nexus-client"
file, err := RenderClientTemplate(baseGroupName, crdModulePath, pkgs, parentsMap)
if err != nil {
return err
}
log.Debugf("Rendered client template: %s", file)
err = createFile(clientFolder, "client.go", file, true)
if err != nil {
return err
}
return nil
}
type clientVars struct {
ApiGroups []ApiGroupsVars
CommonImport string
HelperImport string
BaseClientsetImport string
FakeBaseCliensetImport string
BaseImports string
InformerImports string
ApiGroupsClient string
Nodes []apiGroupsClientVars
}
func RenderClientTemplate(baseGroupName, crdModulePath string, pkgs parser.Packages, parentsMap map[string]parser.NodeHelper) (*bytes.Buffer, error) {
vars, err := generateNexusClientVars(baseGroupName, crdModulePath, pkgs, parentsMap)
if err != nil {
return nil, err
}
clientTemplate, err := readTemplateFile(clientTemplateFile)
if err != nil {
return nil, err
}
tmpl, err := renderTemplate(clientTemplate, vars)
if err != nil {
return nil, err
}
out, err := imports.Process("client.go", tmpl.Bytes(), nil)
if err != nil {
return nil, err
}
return bytes.NewBuffer(out), nil
}
type GraphDetails struct {
BaseImportPath string
Nodes []NodeProperty
GraphQlFiles map[string]string
}
func RenderGraphQL(baseGroupName, outputDir, crdModulePath string, pkgs parser.Packages, parentsMap map[string]parser.NodeHelper, graphqlFiles map[string]string, nonNexusTypes *parser.NonNexusTypes) error {
gqlFolder := outputDir + "/nexus-gql/graph"
var (
vars GraphDetails
err error
)
vars.BaseImportPath = crdModulePath
vars.Nodes, err = GenerateGraphqlResolverVars(baseGroupName, crdModulePath, pkgs, parentsMap)
vars.GraphQlFiles = graphqlFiles
if err != nil {
return err
}
// Render Graphql Schema Template
file, err := RenderGraphqlSchemaTemplate(vars, crdModulePath)
if err != nil {
return err
}
log.Debugf("Rendered graphql schema template: %s", file)
err = createFile(gqlFolder, "schema.graphqls", file, false)
if err != nil {
return err
}
// Render Graphql Resolver Template
file, err = RenderGraphqlResolverTemplate(vars, crdModulePath)
if err != nil {
return err
}
log.Debugf("Rendered graphql Resolver template: %s", file)
if err = createFile(gqlFolder, "graphqlResolver.go", file, false); err != nil {
return err
}
gqlgenFolder := outputDir + "/nexus-gql"
// Render GQLGen Template
file, err = RenderGQLGenTemplate(vars, crdModulePath)
if err != nil {
return err
}
log.Debugf("Rendered gqlgen template: %s", file)
err = createFile(gqlgenFolder, "gqlgen.yml", file, false)
if err != nil {
return err
}
//Render Graphql Schema Template (TSM)
vars.Nodes, err = GenerateTsmGraphqlSchemaVars(baseGroupName, crdModulePath, pkgs, parentsMap, nonNexusTypes)
if err != nil {
return err
}
tsmGqlFolder := outputDir + "/tsm-nexus-gql/graph"
schemaTemplate, err := readTemplateFile(tsmGraphqlSchemaTemplateFile)
if err != nil {
return err
}
tsmFile, err := renderTemplate(schemaTemplate, vars)
if err != nil {
return err
}
log.Debugf("Rendered graphql schema template: %s", tsmFile)
err = createFile(tsmGqlFolder, "schema.graphqls", tsmFile, false)
if err != nil {
return err
}
return nil
}
func RenderGraphqlSchemaTemplate(vars GraphDetails, crdModulePath string) (*bytes.Buffer, error) {
vars.BaseImportPath = crdModulePath
schemaTemplate, err := readTemplateFile(graphqlSchemaTemplateFile)
if err != nil {
return nil, err
}
return renderTemplate(schemaTemplate, vars)
}
func RenderGQLGenTemplate(vars GraphDetails, crdModulePath string) (*bytes.Buffer, error) {
vars.BaseImportPath = crdModulePath
gqlConfigTemplate, err := readTemplateFile(gqlgenconfigTemplateFile)
if err != nil {
return nil, err
}
return renderTemplate(gqlConfigTemplate, vars)
}
func RenderGraphqlResolverTemplate(vars GraphDetails, crdModulePath string) (*bytes.Buffer, error) {
vars.BaseImportPath = crdModulePath
gqlResolverTemplate, err := readTemplateFile(graphqlResolverTemplateFile)
if err != nil {
return nil, err
}
return renderTemplate(gqlResolverTemplate, vars)
}
type ServerVars struct {
BaseImportPath string
}
func RenderGqlserver(outputDir, crdModulePath string) error {
gqlserverFolder := outputDir + "/nexus-gql"
// Render Gql Server Template
var vars ServerVars
vars.BaseImportPath = crdModulePath
file, err := RenderGqlServerTemplate(vars)
if err != nil {
return err
}
log.Debugf("Rendered gqlserver template: %s", file)
err = createFile(gqlserverFolder, "server.go", file, false)
if err != nil {
return err
}
return nil
}
func RenderGqlServerTemplate(vars ServerVars) (*bytes.Buffer, error) {
registerGqlserverTemplate, err := readTemplateFile(gqlserverTemplateFile)
if err != nil {
return nil, err
}
return renderTemplate(registerGqlserverTemplate, vars)
}
type CommonVars struct {
Types string
}
func RenderNonNexusTypes(outputDir string, nonNexusTypes *parser.NonNexusTypes, fileset *token.FileSet) error {
outputModelFolder := outputDir + "/model"
err := createFolder(outputModelFolder)
if err != nil {
return err
}
var output string
for _, decl := range nonNexusTypes.Types {
var buf bytes.Buffer
err := printer.Fprint(&buf, fileset, decl)
if err != nil {
return err
}
output += fmt.Sprintf("%s\n\n", buf.String())
}
for _, val := range nonNexusTypes.Values {
output += fmt.Sprintf("%s\n\n", val)
}
for _, val := range nonNexusTypes.ExternalTypes {
output += fmt.Sprintf("%s\n\n", val)
}
vars := CommonVars{Types: output}
tmpl, err := readTemplateFile(modelTemplateFile)
if err != nil {
return err
}
out, err := renderTemplate(tmpl, vars)
if err != nil {
return err
}
if len(output) > 0 {
err = createFile(outputModelFolder, "model.go", out, false)
if err != nil {
return err
}
}
return nil
}