docs(goctl): goctl 1.3.4 migration note (#1780)

* docs(goctl): goctl 1.3.4 migration note

* adds a simple lang check
* adds migration notes

* chore: remove i18n

* chore: remove todo

tools/goctl/model/sql/command/migrationnotes/migrationnotes.go

@@ -0,0 +1,27 @@
+package migrationnotes
+
+import (
+	"github.com/urfave/cli"
+	"github.com/zeromicro/go-zero/tools/goctl/config"
+	"github.com/zeromicro/go-zero/tools/goctl/util/format"
+)
+
+// BeforeCommands run before comamnd run to show some migration notes
+func BeforeCommands(ctx *cli.Context) error {
+	if err := migrateBefore1_3_4(ctx); err != nil {
+		return err
+	}
+	return nil
+}
+
+func getModelSuffix(style string) (string, error) {
+	cfg, err := config.NewConfig(style)
+	if err != nil {
+		return "", err
+	}
+	baseSuffix, err := format.FileNamingFormat(cfg.NamingFormat, "_model")
+	if err != nil {
+		return "", err
+	}
+	return baseSuffix + ".go", nil
+}

tools/goctl/model/sql/command/migrationnotes/v1.3.4.go

@@ -0,0 +1,57 @@
+package migrationnotes
+
+import (
+	"fmt"
+	"io/ioutil"
+	"strings"
+
+	"github.com/urfave/cli"
+)
+
+func migrateBefore1_3_4(ctx *cli.Context) error {
+	dir := ctx.String("dir")
+	style := ctx.String("style")
+	ok, err := needShow1_3_4(dir, style)
+	if err != nil {
+		return err
+	}
+	if !ok {
+		return nil
+	}
+
+	fmt.Println(`It seems like that your goctl has just been upgraded to version 1.3.4 or later, which refactored the code of the model module. The original XXXmodel.go has been split into XXXmodel_gen.go (read-only) and XXXmodel.go. You just need to follow these steps to complete the migration:
+1. back up the original XXXmodel.go (make sure the file name is no longer in the current directory)
+2. re-run the generate command (a new XXXmodel.go will be created)
+3. populate XXXmodel.go with the code that is not generated by goctl according to the comments in XXXmodel_gen.go`)
+
+	return nil
+}
+
+func needShow1_3_4(dir, style string) (bool, error) {
+	files, err := ioutil.ReadDir(dir)
+	if err != nil {
+		return false, nil
+	}
+	// Returns false when the directory contains a file with the suffix "_gen.go"
+	// In addition, it returns true if it contains a model file extension.
+	// In other case, false is returned.
+	for _, f := range files {
+		if f.IsDir() {
+			continue
+		}
+		if strings.HasSuffix(f.Name(), "_gen.go") {
+			return false, nil
+		}
+	}
+	modelSuffix, err := getModelSuffix(style)
+	if err != nil {
+		return false, err
+	}
+	for _, f := range files {
+		if !f.IsDir() && strings.HasSuffix(f.Name(), modelSuffix) {
+			return true, nil
+		}
+	}
+	return false, nil
+
+}

tools/goctl/model/sql/command/migrationnotes/v1.3.4_test.go

@@ -0,0 +1,75 @@
+package migrationnotes
+
+import (
+	"io/fs"
+	"io/ioutil"
+	"os"
+	"path"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func Test_needShow1_3_4(t *testing.T) {
+	root, err := os.MkdirTemp("", "goctl-model")
+	require.NoError(t, err)
+	defer os.RemoveAll(root)
+
+	dir1 := path.Join(root, "dir1")
+	require.NoError(t, os.Mkdir(dir1, fs.ModePerm))
+	ioutil.WriteFile(filepath.Join(dir1, "foo_gen.go"), nil, fs.ModePerm)
+
+	dir2 := path.Join(root, "dir2")
+	require.NoError(t, os.Mkdir(dir2, fs.ModePerm))
+	ioutil.WriteFile(filepath.Join(dir2, "foomodel.go"), nil, fs.ModePerm)
+
+	dir3 := path.Join(root, "dir3")
+	require.NoError(t, os.Mkdir(dir3, fs.ModePerm))
+	ioutil.WriteFile(filepath.Join(dir3, "irrelevant.go"), nil, fs.ModePerm)
+
+	type args struct {
+		dir   string
+		style string
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    bool
+		wantErr bool
+	}{
+		{
+			name: "dir that contains *_gen.go should return false",
+			args: args{
+				dir: dir1,
+			},
+			want: false,
+		},
+		{
+			name: "dir that contains *model.go without *_gen.go should return true",
+			args: args{
+				dir: dir2,
+			},
+			want: true,
+		},
+		{
+			name: "dir that only contains irrelevant files should return false",
+			args: args{
+				dir: dir3,
+			},
+			want: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := needShow1_3_4(tt.args.dir, tt.args.style)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("needShow1_3_4() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if got != tt.want {
+				t.Errorf("needShow1_3_4() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}