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generator.go
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generator.go
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package gormgen
import (
"bytes"
"context"
"database/sql"
"fmt"
"github.com/iancoleman/strcase"
"github.com/pkg/errors"
"github.com/unionj-cloud/go-doudou/v2/toolkit/astutils"
v3 "github.com/unionj-cloud/go-doudou/v2/toolkit/protobuf/v3"
"github.com/unionj-cloud/go-doudou/v2/toolkit/sliceutils"
"io"
"io/ioutil"
"log"
"os"
"path/filepath"
"runtime"
"strconv"
"strings"
"text/template"
"golang.org/x/tools/go/packages"
"golang.org/x/tools/imports"
"gorm.io/gorm"
"gorm.io/gorm/schema"
"github.com/gobwas/glob"
"github.com/unionj-cloud/go-doudou/v2/toolkit/gormgen/helper"
"github.com/unionj-cloud/go-doudou/v2/toolkit/gormgen/internal/generate"
"github.com/unionj-cloud/go-doudou/v2/toolkit/gormgen/internal/model"
"github.com/unionj-cloud/go-doudou/v2/toolkit/gormgen/internal/parser"
tmpl "github.com/unionj-cloud/go-doudou/v2/toolkit/gormgen/internal/template"
"github.com/unionj-cloud/go-doudou/v2/toolkit/gormgen/internal/utils/pools"
)
// T generic type
type T interface{}
// M map[string]interface{}
type M map[string]interface{}
// SQLResult sql.result
type SQLResult sql.Result
// SQLRow sql.Row
type SQLRow sql.Row
// SQLRows sql.Rows
type SQLRows sql.Rows
// RowsAffected execute affected raws
type RowsAffected int64
var concurrent = runtime.NumCPU()
func init() { runtime.GOMAXPROCS(runtime.NumCPU()) }
// NewGenerator create a new generator
func NewGenerator(cfg Config) *Generator {
if err := cfg.Revise(); err != nil {
panic(fmt.Errorf("create generator fail: %w", err))
}
return &Generator{
Config: cfg,
Data: make(map[string]*genInfo),
models: make(map[string]*generate.QueryStructMeta),
}
}
// genInfo info about generated code
type genInfo struct {
*generate.QueryStructMeta
Interfaces []*generate.InterfaceMethod
}
func (i *genInfo) appendMethods(methods []*generate.InterfaceMethod) {
for _, newMethod := range methods {
if i.methodInGenInfo(newMethod) {
continue
}
i.Interfaces = append(i.Interfaces, newMethod)
}
}
func (i *genInfo) methodInGenInfo(m *generate.InterfaceMethod) bool {
for _, method := range i.Interfaces {
if method.IsRepeatFromSameInterface(m) {
return true
}
}
return false
}
// Generator code generator
type Generator struct {
Config
Data map[string]*genInfo //gen query data
models map[string]*generate.QueryStructMeta //gen model data
}
// UseDB set db connection
func (g *Generator) UseDB(db *gorm.DB) {
if db != nil {
g.db = db
}
}
/*
** The feature of mapping table from database server to Golang struct
** Provided by @qqxhb
*/
// GenerateModel catch table info from db, return a BaseStruct
func (g *Generator) GenerateModel(tableName string, opts ...ModelOpt) *generate.QueryStructMeta {
return g.GenerateModelAs(tableName, g.db.Config.NamingStrategy.SchemaName(tableName), opts...)
}
// GenerateModelAs catch table info from db, return a BaseStruct
func (g *Generator) GenerateModelAs(tableName string, modelName string, opts ...ModelOpt) *generate.QueryStructMeta {
meta, err := generate.GetQueryStructMeta(g.db, g.genModelConfig(tableName, modelName, opts))
if err != nil {
g.db.Logger.Error(context.Background(), "generate struct from table fail: %s", err)
panic("generate struct fail")
}
if meta == nil {
g.info(fmt.Sprintf("ignore table <%s>", tableName))
return nil
}
g.models[meta.ModelStructName] = meta
g.info(fmt.Sprintf("got %d columns from table <%s>", len(meta.Fields), meta.TableName))
return meta
}
// GenerateAllTable generate all tables in db
func (g *Generator) GenerateAllTable(opts ...ModelOpt) (tableModels []interface{}) {
tableList, err := g.db.Migrator().GetTables()
if err != nil {
panic(fmt.Errorf("get all tables fail: %w", err))
}
g.info(fmt.Sprintf("find %d table from db: %s", len(tableList), tableList))
tableModels = make([]interface{}, len(tableList))
for i, tableName := range tableList {
tableModels[i] = g.GenerateModel(tableName, opts...)
}
return tableModels
}
// GenerateTablesByGlob generate all tables filterd by glob syntax in db
func (g *Generator) GenerateTablesByGlob(gl glob.Glob, opts ...ModelOpt) (tableModels []interface{}) {
tableList, err := g.db.Migrator().GetTables()
if err != nil {
panic(fmt.Errorf("get all tables fail: %w", err))
}
filteredTables := make([]string, 0)
for _, item := range tableList {
if gl.Match(item) {
filteredTables = append(filteredTables, item)
}
}
tableList = filteredTables
g.info(fmt.Sprintf("find %d table from db: %s", len(tableList), tableList))
tableModels = make([]interface{}, len(tableList))
for i, tableName := range tableList {
tableModels[i] = g.GenerateModel(tableName, opts...)
}
return tableModels
}
// GenerateFilteredTables generate all tables filterd by glob syntax in db
func (g *Generator) GenerateFilteredTables(opts ...ModelOpt) (tableModels []interface{}) {
return g.GenerateTablesByGlob(g.FilterTableGlob, opts...)
}
// GenerateModelFrom generate model from object
func (g *Generator) GenerateModelFrom(obj helper.Object) *generate.QueryStructMeta {
s, err := generate.GetQueryStructMetaFromObject(obj, g.genModelObjConfig())
if err != nil {
panic(fmt.Errorf("generate struct from object fail: %w", err))
}
g.models[s.ModelStructName] = s
g.info(fmt.Sprintf("parse object %s", obj.StructName()))
return s
}
func (g *Generator) genModelConfig(tableName string, modelName string, modelOpts []ModelOpt) *model.Config {
if modelOpts == nil {
modelOpts = g.modelOpts
} else {
modelOpts = append(modelOpts, g.modelOpts...)
}
return &model.Config{
ModelPkg: g.Config.ModelPkgPath,
TablePrefix: g.getTablePrefix(),
TableName: tableName,
ModelName: modelName,
ImportPkgPaths: g.importPkgPaths,
ModelOpts: modelOpts,
NameStrategy: model.NameStrategy{
SchemaNameOpts: g.dbNameOpts,
TableNameNS: g.tableNameNS,
ModelNameNS: g.modelNameNS,
FileNameNS: g.fileNameNS,
},
FieldConfig: model.FieldConfig{
DataTypeMap: g.dataTypeMap,
FieldSignable: g.FieldSignable,
FieldNullable: g.FieldNullable,
FieldCoverable: g.FieldCoverable,
FieldWithIndexTag: g.FieldWithIndexTag,
FieldWithTypeTag: g.FieldWithTypeTag,
FieldJSONTagNS: g.fieldJSONTagNS,
},
}
}
func (g *Generator) getTablePrefix() string {
if ns, ok := g.db.NamingStrategy.(schema.NamingStrategy); ok {
return ns.TablePrefix
}
return ""
}
func (g *Generator) genModelObjConfig() *model.Config {
return &model.Config{
ModelPkg: g.Config.ModelPkgPath,
ImportPkgPaths: g.importPkgPaths,
NameStrategy: model.NameStrategy{
TableNameNS: g.tableNameNS,
ModelNameNS: g.modelNameNS,
FileNameNS: g.fileNameNS,
},
}
}
// ApplyBasic specify models which will implement basic .diy_method
func (g *Generator) ApplyBasic(models ...interface{}) {
g.ApplyInterface(func() {}, models...)
}
// ApplyInterface specifies .diy_method interfaces on structures, implment codes will be generated after calling g.Execute()
// eg: g.ApplyInterface(func(model.Method){}, model.User{}, model.Company{})
func (g *Generator) ApplyInterface(fc interface{}, models ...interface{}) {
structs, err := generate.ConvertStructs(g.db, models...)
if err != nil {
g.db.Logger.Error(context.Background(), "check struct fail: %v", err)
panic("check struct fail")
}
g.apply(fc, structs)
}
func (g *Generator) apply(fc interface{}, structs []*generate.QueryStructMeta) {
interfacePaths, err := parser.GetInterfacePath(fc)
if err != nil {
g.db.Logger.Error(context.Background(), "get interface name or file fail: %s", err)
panic("check interface fail")
}
readInterface := new(parser.InterfaceSet)
err = readInterface.ParseFile(interfacePaths, generate.GetStructNames(structs))
if err != nil {
g.db.Logger.Error(context.Background(), "parser interface file fail: %s", err)
panic("parser interface file fail")
}
for _, interfaceStructMeta := range structs {
if g.judgeMode(WithoutContext) {
interfaceStructMeta.ReviseFieldNameFor(model.GormKeywords)
}
interfaceStructMeta.ReviseFieldNameFor(model.DOKeywords)
genInfo, err := g.pushQueryStructMeta(interfaceStructMeta)
if err != nil {
g.db.Logger.Error(context.Background(), "gen struct fail: %v", err)
panic("gen struct fail")
}
functions, err := generate.BuildDIYMethod(readInterface, interfaceStructMeta, genInfo.Interfaces)
if err != nil {
g.db.Logger.Error(context.Background(), "check interface fail: %v", err)
panic("check interface fail")
}
genInfo.appendMethods(functions)
}
}
// Execute generate code to output path
func (g *Generator) Execute() {
g.info("Start generating orm related code.")
if err := g.generateModelFile(); err != nil {
g.db.Logger.Error(context.Background(), "generate model struct fail: %s", err)
panic("generate model struct fail")
}
if err := g.generateQueryFile(); err != nil {
g.db.Logger.Error(context.Background(), "generate query code fail: %s", err)
panic("generate query code fail")
}
g.info("Generate orm related code done.")
}
// GenerateDtoFile generate dto code to output path
func (g *Generator) GenerateDtoFile() {
g.info("Start generating dto code.")
if err := g.generateDtoFile(); err != nil {
g.db.Logger.Error(context.Background(), "generate dto struct fail: %s", err)
panic("generate dto struct fail")
}
g.info("Generate dto code done.")
}
// GenerateSvcGo ...
func (g *Generator) GenerateSvcGo() {
g.info("Start generating svc.go.")
if err := g.generateSvcGoFile(); err != nil {
g.db.Logger.Error(context.Background(), "generate svc.go fail: %s", err)
panic("generate svc.go fail")
}
g.info("Generate code svc.go done.")
}
// GenerateSvcImplGo ...
func (g *Generator) GenerateSvcImplGo() {
g.info("Start generating svcimpl.go.")
if err := g.generateSvcImplGoFile(); err != nil {
g.db.Logger.Error(context.Background(), "generate svcimpl.go fail: %s", err)
panic("generate svcimpl.go fail")
}
g.info("Generate code svcimpl.go done.")
}
// GenerateSvcImplGrpc ...
func (g *Generator) GenerateSvcImplGrpc(grpcService v3.Service) {
g.info("Start generating grpc implementation code in svcimpl.go.")
if err := g.generateSvcImplGrpc(grpcService); err != nil {
g.db.Logger.Error(context.Background(), "generate grpc implementation code in svcimpl.go fail: %s", err)
panic("generate grpc implementation code in svcimpl.go fail")
}
g.info("Generate grpc implementation code in svcimpl.go done.")
}
func (g *Generator) filterNewModels(meta astutils.InterfaceMeta) []*generate.QueryStructMeta {
models := make([]*generate.QueryStructMeta, 0, len(g.models))
for _, data := range g.models {
if data == nil || !data.Generated {
continue
}
targets := []string{
fmt.Sprintf("PostGen%s", data.ModelStructName),
fmt.Sprintf("GetGen%s_Id", data.ModelStructName),
fmt.Sprintf("PutGen%s", data.ModelStructName),
fmt.Sprintf("DeleteGen%s_Id", data.ModelStructName),
fmt.Sprintf("GetGen%ss", data.ModelStructName),
}
count := 0
for _, method := range meta.Methods {
if sliceutils.StringContains(targets, method.Name) {
count++
}
}
if count == 0 {
models = append(models, data)
}
}
return models
}
func (g *Generator) filterNewModelsGrpc(meta astutils.InterfaceMeta) []*generate.QueryStructMeta {
models := make([]*generate.QueryStructMeta, 0, len(g.models))
for _, data := range g.models {
if data == nil || !data.Generated {
continue
}
targets := []string{
fmt.Sprintf("PostGen%sRpc", data.ModelStructName),
fmt.Sprintf("GetGen%sIdRpc", data.ModelStructName),
fmt.Sprintf("PutGen%sRpc", data.ModelStructName),
fmt.Sprintf("DeleteGen%sIdRpc", data.ModelStructName),
fmt.Sprintf("GetGen%ssRpc", data.ModelStructName),
}
count := 0
for _, method := range meta.Methods {
if sliceutils.StringContains(targets, method.Name) {
count++
}
}
if count == 0 {
models = append(models, data)
}
}
return models
}
// generateSvcGoFile generate svc.go code and save to file
func (g *Generator) generateSvcGoFile() error {
if len(g.models) == 0 {
return nil
}
svcFile := filepath.Join(g.RootDir, "svc.go")
fi, err := os.Stat(svcFile)
if err != nil && !os.IsNotExist(err) {
return errors.WithStack(err)
}
var interfaceMeta astutils.InterfaceMeta
var f *os.File
if fi != nil {
ic := astutils.BuildInterfaceCollector(svcFile, astutils.ExprString)
if len(ic.Interfaces) > 0 {
interfaceMeta = ic.Interfaces[0]
}
g.info("New content will be append to svc.go file")
if f, err = os.OpenFile(svcFile, os.O_APPEND, os.ModePerm); err != nil {
return errors.WithStack(err)
}
defer f.Close()
} else {
if f, err = os.Create(svcFile); err != nil {
panic(err)
}
defer f.Close()
var buf bytes.Buffer
if err = render(tmpl.Svc, &buf, struct {
InterfaceName string
DtoPackage string
}{
InterfaceName: strcase.ToCamel(strcase.ToCamel(filepath.Base(g.RootDir))),
DtoPackage: g.Config.dtoPkgPath,
}); err != nil {
return errors.WithStack(err)
}
if err = ioutil.WriteFile(svcFile, buf.Bytes(), 0640); err != nil {
return errors.WithStack(err)
}
}
models := g.filterNewModels(interfaceMeta)
var buf bytes.Buffer
for _, model := range models {
if err = render(tmpl.AppendSvc, &buf, model); err != nil {
return errors.WithStack(err)
}
}
var original []byte
if original, err = ioutil.ReadAll(f); err != nil {
return errors.WithStack(err)
}
original = bytes.TrimSpace(original)
last := bytes.LastIndexByte(original, '}')
original = append(original[:last], buf.Bytes()...)
original = append(original, '}')
if err = g.outputWithOpt(svcFile, original, &imports.Options{
TabWidth: 8,
TabIndent: true,
Comments: true,
Fragment: true,
}); err != nil {
return errors.WithStack(err)
}
return nil
}
// generateSvcImplGoFile generate svcimpl.go code and save to file
func (g *Generator) generateSvcImplGoFile() error {
if len(g.models) == 0 {
return nil
}
svcImplFile := filepath.Join(g.RootDir, "svcimpl.go")
fi, err := os.Stat(svcImplFile)
if err != nil && !os.IsNotExist(err) {
return errors.WithStack(err)
}
var interfaceMeta astutils.InterfaceMeta
interfaceMeta.Name = strcase.ToCamel(strcase.ToCamel(filepath.Base(g.RootDir)))
var f *os.File
if fi != nil {
sc := astutils.NewStructCollector(astutils.ExprString)
astutils.CollectStructsInFolder(g.RootDir, sc)
interfaceMeta.Methods = sc.Methods[interfaceMeta.Name+"Impl"]
g.info("New content will be append to svcimpl.go file")
if f, err = os.OpenFile(svcImplFile, os.O_APPEND, os.ModePerm); err != nil {
return errors.WithStack(err)
}
defer f.Close()
} else {
if f, err = os.Create(svcImplFile); err != nil {
panic(err)
}
defer f.Close()
var buf bytes.Buffer
if err = render(tmpl.SvcImpl, &buf, struct {
InterfaceName string
}{
InterfaceName: interfaceMeta.Name,
}); err != nil {
return errors.WithStack(err)
}
if err = ioutil.WriteFile(svcImplFile, buf.Bytes(), 0640); err != nil {
return errors.WithStack(err)
}
}
models := g.filterNewModels(interfaceMeta)
var buf bytes.Buffer
for _, model := range models {
if err = render(tmpl.AppendSvcImpl, &buf, struct {
*generate.QueryStructMeta
InterfaceName string
}{
QueryStructMeta: model,
InterfaceName: interfaceMeta.Name,
}); err != nil {
return errors.WithStack(err)
}
}
var original []byte
if original, err = ioutil.ReadAll(f); err != nil {
return errors.WithStack(err)
}
original = append(original, buf.Bytes()...)
confPkg := g.GetPkgPath(filepath.Join(g.RootDir, "config"))
dtoPkg := g.GetPkgPath(filepath.Join(g.RootDir, "dto"))
queryPkg := g.GetPkgPath(g.OutPath)
// fix import block
var importBuf bytes.Buffer
if err = render(tmpl.SvcImplImport, &importBuf, struct {
ConfigPackage string
DtoPackage string
ModelPackage string
QueryPackage string
}{
ConfigPackage: confPkg,
DtoPackage: dtoPkg,
ModelPackage: g.modelPkgPath,
QueryPackage: queryPkg,
}); err != nil {
return errors.WithStack(err)
}
original = astutils.AppendImportStatements(original, importBuf.Bytes())
if err = g.outputWithOpt(svcImplFile, original, &imports.Options{
TabWidth: 8,
TabIndent: true,
Comments: true,
Fragment: true,
}); err != nil {
return errors.WithStack(err)
}
return nil
}
// info logger
func (g *Generator) info(logInfos ...string) {
for _, l := range logInfos {
g.db.Logger.Info(context.Background(), l)
log.Println(l)
}
}
// generateQueryFile generate query code and save to file
func (g *Generator) generateQueryFile() (err error) {
if len(g.Data) == 0 {
return nil
}
if err = os.MkdirAll(g.OutPath, os.ModePerm); err != nil {
return fmt.Errorf("make dir outpath(%s) fail: %s", g.OutPath, err)
}
errChan := make(chan error)
pool := pools.NewPool(concurrent)
// generate query code for all struct
for _, info := range g.Data {
pool.Wait()
go func(info *genInfo) {
defer pool.Done()
err := g.generateSingleQueryFile(info)
if err != nil {
errChan <- err
}
if g.WithUnitTest {
err = g.generateQueryUnitTestFile(info)
if err != nil { // do not panic
g.db.Logger.Error(context.Background(), "generate unit test fail: %s", err)
}
}
}(info)
}
select {
case err = <-errChan:
return errors.WithStack(err)
case <-pool.AsyncWaitAll():
}
if !g.GenGenGo {
return nil
}
importPkgs := importList.Add(g.importPkgPaths...).Paths()
// generate query file
var buf bytes.Buffer
err = render(tmpl.Header, &buf, map[string]interface{}{
"Package": g.queryPkgName,
"ImportPkgPaths": importPkgs,
})
if err != nil {
return errors.WithStack(err)
}
if g.judgeMode(WithDefaultQuery) {
err = render(tmpl.DefaultQuery, &buf, g)
if err != nil {
return errors.WithStack(err)
}
}
err = render(tmpl.QueryMethod, &buf, g)
if err != nil {
return errors.WithStack(err)
}
err = g.output(g.OutFile, buf.Bytes())
if err != nil {
return errors.WithStack(err)
}
g.info("generate query file: " + g.OutFile)
// generate query unit test file
if g.WithUnitTest {
buf.Reset()
err = render(tmpl.Header, &buf, map[string]interface{}{
"Package": g.queryPkgName,
"ImportPkgPaths": unitTestImportList.Add(g.importPkgPaths...).Paths(),
})
if err != nil {
g.db.Logger.Error(context.Background(), "generate query unit test fail: %s", err)
return nil
}
err = render(tmpl.DIYMethodTestBasic, &buf, nil)
if err != nil {
return errors.WithStack(err)
}
err = render(tmpl.QueryMethodTest, &buf, g)
if err != nil {
g.db.Logger.Error(context.Background(), "generate query unit test fail: %s", err)
return nil
}
fileName := strings.TrimSuffix(g.OutFile, ".go") + "_test.go"
err = g.output(fileName, buf.Bytes())
if err != nil {
g.db.Logger.Error(context.Background(), "generate query unit test fail: %s", err)
return nil
}
g.info("generate unit test file: " + fileName)
}
return nil
}
// generateSingleQueryFile generate query code and save to file
func (g *Generator) generateSingleQueryFile(data *genInfo) (err error) {
var buf bytes.Buffer
structPkgPath := data.StructInfo.PkgPath
if structPkgPath == "" {
structPkgPath = g.modelPkgPath
}
importPkgs := importList.Add(structPkgPath).Add(getImportPkgPaths(data)...).Paths()
err = render(tmpl.Header, &buf, map[string]interface{}{
"Package": g.queryPkgName,
"ImportPkgPaths": importPkgs,
})
if err != nil {
return errors.WithStack(err)
}
data.QueryStructMeta = data.QueryStructMeta.IfaceMode(g.judgeMode(WithQueryInterface))
structTmpl := tmpl.TableQueryStructWithContext
if g.judgeMode(WithoutContext) {
structTmpl = tmpl.TableQueryStruct
}
err = render(structTmpl, &buf, data.QueryStructMeta)
if err != nil {
return errors.WithStack(err)
}
if g.judgeMode(WithQueryInterface) {
err = render(tmpl.TableQueryIface, &buf, data)
if err != nil {
return errors.WithStack(err)
}
}
for _, method := range data.Interfaces {
err = render(tmpl.DIYMethod, &buf, method)
if err != nil {
return errors.WithStack(err)
}
}
err = render(tmpl.CRUDMethod, &buf, data.QueryStructMeta)
if err != nil {
return errors.WithStack(err)
}
defer g.info(fmt.Sprintf("generate query file: %s%s%s.gen.go", g.OutPath, string(os.PathSeparator), data.FileName))
return g.output(fmt.Sprintf("%s%s%s.gen.go", g.OutPath, string(os.PathSeparator), data.FileName), buf.Bytes())
}
// generateQueryUnitTestFile generate unit test file for query
func (g *Generator) generateQueryUnitTestFile(data *genInfo) (err error) {
var buf bytes.Buffer
structPkgPath := data.StructInfo.PkgPath
if structPkgPath == "" {
structPkgPath = g.modelPkgPath
}
err = render(tmpl.Header, &buf, map[string]interface{}{
"Package": g.queryPkgName,
"ImportPkgPaths": unitTestImportList.Add(structPkgPath).Add(data.ImportPkgPaths...).Paths(),
})
if err != nil {
return errors.WithStack(err)
}
err = render(tmpl.CRUDMethodTest, &buf, data.QueryStructMeta)
if err != nil {
return errors.WithStack(err)
}
for _, method := range data.Interfaces {
err = render(tmpl.DIYMethodTest, &buf, method)
if err != nil {
return errors.WithStack(err)
}
}
defer g.info(fmt.Sprintf("generate unit test file: %s%s%s.gen_test.go", g.OutPath, string(os.PathSeparator), data.FileName))
return g.output(fmt.Sprintf("%s%s%s.gen_test.go", g.OutPath, string(os.PathSeparator), data.FileName), buf.Bytes())
}
// generateModelFile generate model structures and save to file
func (g *Generator) generateModelFile() error {
if len(g.models) == 0 {
return nil
}
modelOutPath, err := g.getModelOutputPath()
if err != nil {
return errors.WithStack(err)
}
if err = os.MkdirAll(modelOutPath, os.ModePerm); err != nil {
return fmt.Errorf("create model pkg path(%s) fail: %s", modelOutPath, err)
}
errChan := make(chan error)
pool := pools.NewPool(concurrent)
for _, data := range g.models {
if data == nil || !data.Generated {
continue
}
pool.Wait()
go func(data *generate.QueryStructMeta) {
defer pool.Done()
var buf bytes.Buffer
funcMap := make(map[string]interface{})
funcMap["convert"] = func(s string) string {
return strings.ReplaceAll(s, "time.Time", "customtypes.Time")
}
funcMap["contains"] = strings.Contains
t, err := template.New(tmpl.Model).Funcs(funcMap).Parse(tmpl.Model)
if err != nil {
errChan <- err
return
}
err = t.Execute(&buf, struct {
*generate.QueryStructMeta
ConfigPackage string
}{
QueryStructMeta: data,
ConfigPackage: g.ConfigPackage,
})
if err != nil {
errChan <- err
return
}
for _, method := range data.ModelMethods {
err = render(tmpl.ModelMethod, &buf, method)
if err != nil {
errChan <- err
return
}
}
modelFile := modelOutPath + data.FileName + ".gen.go"
err = g.output(modelFile, buf.Bytes())
if err != nil {
errChan <- err
return
}
g.info(fmt.Sprintf("generate model file(table <%s> -> {%s.%s}): %s", data.TableName, data.StructInfo.Package, data.StructInfo.Type, modelFile))
}(data)
}
select {
case err = <-errChan:
return errors.WithStack(err)
case <-pool.AsyncWaitAll():
g.fillModelPkgPath(modelOutPath)
}
return nil
}
func (g *Generator) getModelOutputPath() (outPath string, err error) {
if strings.Contains(g.ModelPkgPath, string(os.PathSeparator)) {
outPath, err = filepath.Abs(g.ModelPkgPath)
if err != nil {
return "", fmt.Errorf("cannot parse model pkg path: %w", err)
}
} else {
outPath = filepath.Join(filepath.Dir(g.OutPath), g.ModelPkgPath)
}
return outPath + string(os.PathSeparator), nil
}
func (g *Generator) fillModelPkgPath(filePath string) {
pkgs, err := packages.Load(&packages.Config{
Mode: packages.NeedName,
Dir: filePath,
})
if err != nil {
g.db.Logger.Warn(context.Background(), "parse model pkg path fail: %s", err)
return
}
if len(pkgs) == 0 {
g.db.Logger.Warn(context.Background(), "parse model pkg path fail: got 0 packages")
return
}
g.Config.modelPkgPath = pkgs[0].PkgPath
}
// output format and output
func (g *Generator) output(fileName string, content []byte) error {
return g.outputWithOpt(fileName, content, nil)
}
// output format and output
func (g *Generator) outputWithOpt(fileName string, content []byte, opt *imports.Options) error {
result, err := imports.Process(fileName, content, opt)
if err != nil {
lines := strings.Split(string(content), "\n")
errLine, _ := strconv.Atoi(strings.Split(err.Error(), ":")[1])
startLine, endLine := errLine-5, errLine+5
fmt.Println("Format fail:", errLine, err)
if startLine < 0 {
startLine = 0
}
if endLine > len(lines)-1 {
endLine = len(lines) - 1
}
for i := startLine; i <= endLine; i++ {
fmt.Println(i, lines[i])
}
return fmt.Errorf("cannot format file: %w", err)
}
return ioutil.WriteFile(fileName, result, 0640)
}
func (g *Generator) pushQueryStructMeta(meta *generate.QueryStructMeta) (*genInfo, error) {
structName := meta.ModelStructName
if g.Data[structName] == nil {
g.Data[structName] = &genInfo{QueryStructMeta: meta}
}
if g.Data[structName].Source != meta.Source {
return nil, fmt.Errorf("cannot generate struct with the same name from different source:%s.%s and %s.%s",
meta.StructInfo.Package, meta.ModelStructName, g.Data[structName].StructInfo.Package, g.Data[structName].ModelStructName)
}
return g.Data[structName], nil
}
func render(tmpl string, wr io.Writer, data interface{}) error {
t, err := template.New(tmpl).Parse(tmpl)
if err != nil {
return errors.WithStack(err)
}
return t.Execute(wr, data)
}
func getImportPkgPaths(data *genInfo) []string {
importPathMap := make(map[string]struct{})
for _, path := range data.ImportPkgPaths {
importPathMap[path] = struct{}{}
}
// imports.Process (called in Generator.output) will guess missing imports, and will be
// much faster if import path is already specified. So add all imports from DIY interface package.
for _, method := range data.Interfaces {
for _, param := range method.Params {
importPathMap[param.PkgPath] = struct{}{}
}
}
importPkgPaths := make([]string, 0, len(importPathMap))
for importPath := range importPathMap {
importPkgPaths = append(importPkgPaths, importPath)
}
return importPkgPaths
}
// generateDtoFile generate dto structures and save to file
func (g *Generator) generateDtoFile() error {
if len(g.models) == 0 {
return nil
}
dtoOutPath, err := g.getDtoOutputPath()
if err != nil {
return errors.WithStack(err)
}
if err = os.MkdirAll(dtoOutPath, os.ModePerm); err != nil {
return fmt.Errorf("create model pkg path(%s) fail: %s", dtoOutPath, err)
}
errChan := make(chan error)
pool := pools.NewPool(concurrent)
for _, data := range g.models {
if data == nil || !data.Generated {
continue
}
pool.Wait()
go func(data *generate.QueryStructMeta) {
defer pool.Done()
dtoFile := dtoOutPath + data.FileName + ".gen.go"
fi, err := os.Stat(dtoFile)
if err != nil && !os.IsNotExist(err) {
panic(err)
}
if fi != nil {
g.info(fmt.Sprintf("skip generating dto file(table <%s> -> {%s.%s}): %s as it already exists", data.TableName, data.StructInfo.Package, data.StructInfo.Type, dtoFile))
return
}
var buf bytes.Buffer
funcMap := make(map[string]interface{})
funcMap["convert"] = func(s string) string {
return strings.ReplaceAll(s, "time.Time", "customtypes.Time")
}
t, err := template.New(tmpl.Dto).Funcs(funcMap).Parse(tmpl.Dto)
if err != nil {
errChan <- err
return
}
err = t.Execute(&buf, data)
if err != nil {
errChan <- err
return
}
err = g.output(dtoFile, buf.Bytes())
if err != nil {
errChan <- err
return
}
g.info(fmt.Sprintf("generate dto file(table <%s> -> {%s.%s}): %s", data.TableName, data.StructInfo.Package, data.StructInfo.Type, dtoFile))
}(data)
}
select {
case err = <-errChan:
return errors.WithStack(err)
case <-pool.AsyncWaitAll():
g.fillDtoPkgPath(dtoOutPath)
}
return nil
}