(goctl)feature/model config (#4062)

Co-authored-by: Kevin Wan <wanjunfeng@gmail.com>

tools/goctl/config/config.go

@@ -1,25 +1,71 @@
 package config
 
 import (
+	_ "embed"
 	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
 	"strings"
+
+	"github.com/zeromicro/go-zero/tools/goctl/util/ctx"
+	"github.com/zeromicro/go-zero/tools/goctl/util/pathx"
+	"gopkg.in/yaml.v2"
 )
 
-// DefaultFormat defines a default naming style
-const DefaultFormat = "gozero"
+const (
+	// DefaultFormat defines a default naming style
+	DefaultFormat = "gozero"
+	configFile    = "goctl.yaml"
+)
+
+var (
+	//go:embed default.yaml
+	defaultConfig []byte
+
+	ExternalConfig *External
+)
 
 // Config defines the file naming style
-type Config struct {
-	// NamingFormat is used to define the naming format of the generated file name.
-	// just like time formatting, you can specify the formatting style through the
-	// two format characters go, and zero. for example: snake format you can
-	// define as go_zero, camel case format you can it is defined as goZero,
-	// and even split characters can be specified, such as go#zero. in theory,
-	// any combination can be used, but the prerequisite must meet the naming conventions
-	// of each operating system file name.
-	// Note: NamingFormat is based on snake or camel string
-	NamingFormat string `yaml:"namingFormat"`
-}
+type (
+	Config struct {
+		// NamingFormat is used to define the naming format of the generated file name.
+		// just like time formatting, you can specify the formatting style through the
+		// two format characters go, and zero. for example: snake format you can
+		// define as go_zero, camel case format you can it is defined as goZero,
+		// and even split characters can be specified, such as go#zero. in theory,
+		// any combination can be used, but the prerequisite must meet the naming conventions
+		// of each operating system file name.
+		// Note: NamingFormat is based on snake or camel string
+		NamingFormat string `yaml:"namingFormat"`
+	}
+
+	External struct {
+		// Model is the configuration for the model code generation.
+		Model Model `yaml:"model,omitempty"`
+	}
+
+	// Model defines the configuration for the model code generation.
+	Model struct {
+		// TypesMap: custom Data Type Mapping Table.
+		TypesMap map[string]ModelTypeMapOption `yaml:"types_map,omitempty" `
+	}
+
+	// ModelTypeMapOption custom Type Options.
+	ModelTypeMapOption struct {
+		// Type: valid when not using UnsignedType and NullType.
+		Type string `yaml:"type"`
+
+		// UnsignedType: valid when not using  NullType.
+		UnsignedType string `yaml:"unsigned_type,omitempty"`
+
+		// NullType: priority use.
+		NullType string `yaml:"null_type,omitempty"`
+
+		// Pkg defines the package of the custom type.
+		Pkg string `yaml:"pkg,omitempty"`
+	}
+)
 
 // NewConfig creates an instance for Config
 func NewConfig(format string) (*Config, error) {
@@ -31,6 +77,58 @@ func NewConfig(format string) (*Config, error) {
 	return cfg, err
 }
 
+func init() {
+	var cfg External
+	err := loadConfig(&cfg)
+	if err != nil {
+		fmt.Println(err.Error())
+	} else {
+		ExternalConfig = &cfg
+	}
+}
+
+func loadConfig(cfg *External) error {
+	wd, err := os.Getwd()
+	if err != nil {
+		return err
+	}
+
+	cfgFile, err := getConfigPath(wd)
+	if err != nil {
+		return err
+	}
+	var content []byte
+	if pathx.FileExists(cfgFile) {
+		content, err = os.ReadFile(cfgFile)
+		if err != nil {
+			return err
+		}
+	}
+	if len(content) == 0 {
+		content = append(content, defaultConfig...)
+	}
+	return yaml.Unmarshal(content, cfg)
+}
+
+// getConfigPath returns the configuration file path, but not create the file.
+func getConfigPath(workDir string) (string, error) {
+	abs, err := filepath.Abs(workDir)
+	if err != nil {
+		return "", err
+	}
+
+	err = pathx.MkdirIfNotExist(abs)
+	if err != nil {
+		return "", err
+	}
+
+	projectCtx, err := ctx.Prepare(abs)
+	if err != nil {
+		return "", err
+	}
+	return filepath.Join(projectCtx.Dir, configFile), nil
+}
+
 func validate(cfg *Config) error {
 	if len(strings.TrimSpace(cfg.NamingFormat)) == 0 {
 		return errors.New("missing namingFormat")