all: use %w instead of %v to wrap errors (#1275)

* all: use %w instead of %v for nested errors with fmt.Errorf

* all: update generated code to use %w instead of %v for error wrapping

examples/o2m2types/ent/client.go

@@ -71,7 +71,7 @@ func (c *Client) Tx(ctx context.Context) (*Tx, error) {
 	}
 	tx, err := newTx(ctx, c.driver)
 	if err != nil {
-		return nil, fmt.Errorf("ent: starting a transaction: %v", err)
+		return nil, fmt.Errorf("ent: starting a transaction: %w", err)
 	}
 	cfg := c.config
 	cfg.driver = tx
@@ -92,7 +92,7 @@ func (c *Client) BeginTx(ctx context.Context, opts *sql.TxOptions) (*Tx, error)
 		BeginTx(context.Context, *sql.TxOptions) (dialect.Tx, error)
 	}).BeginTx(ctx, opts)
 	if err != nil {
-		return nil, fmt.Errorf("ent: starting a transaction: %v", err)
+		return nil, fmt.Errorf("ent: starting a transaction: %w", err)
 	}
 	cfg := c.config
 	cfg.driver = &txDriver{tx: tx, drv: c.driver}

examples/o2m2types/ent/ent.go

@@ -265,7 +265,7 @@ func isSQLConstraintError(err error) (*ConstraintError, bool) {
 // rollback calls tx.Rollback and wraps the given error with the rollback error if present.
 func rollback(tx dialect.Tx, err error) error {
 	if rerr := tx.Rollback(); rerr != nil {
-		err = fmt.Errorf("%s: %v", err.Error(), rerr)
+		err = fmt.Errorf("%w: %v", err, rerr)
 	}
 	if err, ok := isSQLConstraintError(err); ok {
 		return err

examples/o2m2types/ent/migrate/migrate.go

@@ -52,7 +52,7 @@ func NewSchema(drv dialect.Driver) *Schema { return &Schema{drv: drv} }
 func (s *Schema) Create(ctx context.Context, opts ...schema.MigrateOption) error {
 	migrate, err := schema.NewMigrate(s.drv, opts...)
 	if err != nil {
-		return fmt.Errorf("ent/migrate: %v", err)
+		return fmt.Errorf("ent/migrate: %w", err)
 	}
 	return migrate.Create(ctx, Tables...)
 }
@@ -70,7 +70,7 @@ func (s *Schema) WriteTo(ctx context.Context, w io.Writer, opts ...schema.Migrat
 	}
 	migrate, err := schema.NewMigrate(drv, opts...)
 	if err != nil {
-		return fmt.Errorf("ent/migrate: %v", err)
+		return fmt.Errorf("ent/migrate: %w", err)
 	}
 	return migrate.Create(ctx, Tables...)
 }

examples/o2m2types/ent/pet_query.go

@@ -414,7 +414,7 @@ func (pq *PetQuery) sqlCount(ctx context.Context) (int, error) {
 func (pq *PetQuery) sqlExist(ctx context.Context) (bool, error) {
 	n, err := pq.sqlCount(ctx)
 	if err != nil {
-		return false, fmt.Errorf("ent: check existence: %v", err)
+		return false, fmt.Errorf("ent: check existence: %w", err)
 	}
 	return n > 0, nil
 }

examples/o2m2types/ent/user_query.go

@@ -410,7 +410,7 @@ func (uq *UserQuery) sqlCount(ctx context.Context) (int, error) {
 func (uq *UserQuery) sqlExist(ctx context.Context) (bool, error) {
 	n, err := uq.sqlCount(ctx)
 	if err != nil {
-		return false, fmt.Errorf("ent: check existence: %v", err)
+		return false, fmt.Errorf("ent: check existence: %w", err)
 	}
 	return n > 0, nil
 }

examples/o2m2types/example_test.go

@@ -41,14 +41,14 @@ func Do(ctx context.Context, client *ent.Client) error {
 		SetName("pedro").
 		Save(ctx)
 	if err != nil {
-		return fmt.Errorf("creating pet: %v", err)
+		return fmt.Errorf("creating pet: %w", err)
 	}
 	lola, err := client.Pet.
 		Create().
 		SetName("lola").
 		Save(ctx)
 	if err != nil {
-		return fmt.Errorf("creating pet: %v", err)
+		return fmt.Errorf("creating pet: %w", err)
 	}
 	// Create the user, and add its pets on the creation.
 	a8m, err := client.User.
@@ -58,7 +58,7 @@ func Do(ctx context.Context, client *ent.Client) error {
 		AddPets(pedro, lola).
 		Save(ctx)
 	if err != nil {
-		return fmt.Errorf("creating user: %v", err)
+		return fmt.Errorf("creating user: %w", err)
 	}
 	fmt.Println("User created:", a8m)
 	// Output: User(id=1, age=30, name=a8m)