add dockerfile generator

tools/goctl/docker/docker.go

@@ -2,16 +2,58 @@ package docker
 
 import (
 	"errors"
+	"os"
+	"path/filepath"
+	"strings"
 
 	"github.com/tal-tech/go-zero/tools/goctl/gen"
 	"github.com/urfave/cli"
 )
 
+const (
+	etcDir  = "etc"
+	yamlEtx = ".yaml"
+)
+
 func DockerCommand(c *cli.Context) error {
 	goFile := c.String("go")
 	if len(goFile) == 0 {
 		return errors.New("-go can't be empty")
 	}
 
-	return gen.GenerateDockerfile(goFile, "-f", "etc/config.yaml")
+	cfg, err := findConfig(goFile, etcDir)
+	if err != nil {
+		return err
+	}
+
+	return gen.GenerateDockerfile(goFile, "-f", "etc/"+cfg)
+}
+
+func findConfig(file, dir string) (string, error) {
+	var files []string
+	err := filepath.Walk(dir, func(path string, f os.FileInfo, _ error) error {
+		if !f.IsDir() {
+			if filepath.Ext(f.Name()) == yamlEtx {
+				files = append(files, f.Name())
+			}
+		}
+
+		return nil
+	})
+	if err != nil {
+		return "", err
+	}
+
+	if len(files) == 0 {
+		return "", errors.New("no yaml file")
+	}
+
+	name := strings.TrimSuffix(filepath.Base(file), ".go")
+	for _, f := range files {
+		if strings.Index(f, name) == 0 {
+			return f, nil
+		}
+	}
+
+	return files[0], nil
 }