sort models by name when using standalone mode (#37)

internal/testdata/models/models.go → internal/testdata/models/pet.go

@@ -2,20 +2,9 @@ package models
 
 import "gorm.io/gorm"
 
-type User struct {
-	gorm.Model
-	Name string
-	Pets []Pet
-}
-
 type Pet struct {
 	gorm.Model
 	Name   string
 	User   User
 	UserID uint
 }
-
-type Toy struct {
-	ID   uint
-	Name string
-}

internal/testdata/models/toy.go

@@ -0,0 +1,6 @@
+package models
+
+type Toy struct {
+	ID   uint
+	Name string
+}

internal/testdata/models/user.go

@@ -0,0 +1,9 @@
+package models
+
+import "gorm.io/gorm"
+
+type User struct {
+	gorm.Model
+	Name string
+	Pets []Pet
+}

main.go

@@ -12,6 +12,7 @@ import (
 	"os"
 	"os/exec"
 	"reflect"
+	"sort"
 	"strings"
 	"text/template"
 	"time"
@@ -156,6 +157,10 @@ func gatherModels(pkgs []*packages.Package) []model {
 			}
 		}
 	}
+	// Return models in deterministic order.
+	sort.Slice(models, func(i, j int) bool {
+		return models[i].Name < models[j].Name
+	})
 	return models
 }
 

main_test.go

@@ -25,3 +25,20 @@ func TestLoad(t *testing.T) {
 		})
 	}
 }
+
+func TestDeterministicOutput(t *testing.T) {
+	expected := "CREATE TABLE `users` (`id` integer,`created_at` datetime,`updated_at` datetime,`deleted_at` datetime,`name` text,PRIMARY KEY (`id`));\n" +
+		"CREATE INDEX `idx_users_deleted_at` ON `users`(`deleted_at`);\n" +
+		"CREATE TABLE `pets` (`id` integer,`created_at` datetime,`updated_at` datetime,`deleted_at` datetime,`name` text,`user_id` integer,PRIMARY KEY (`id`),CONSTRAINT `fk_users_pets` FOREIGN KEY (`user_id`) REFERENCES `users`(`id`));\nCREATE INDEX `idx_pets_deleted_at` ON `pets`(`deleted_at`);\n\n"
+	cmd := &LoadCmd{
+		Path:    "./internal/testdata/models",
+		Dialect: "sqlite",
+	}
+	for i := 0; i < 10; i++ {
+		var buf bytes.Buffer
+		cmd.out = &buf
+		err := cmd.Run()
+		require.NoError(t, err)
+		require.Equal(t, expected, buf.String())
+	}
+}