Add v2 version to go module name

Replace all elements from `v2` to root directory.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

object/grpc/client.go

@@ -0,0 +1,86 @@
+package object
+
+import (
+	"context"
+	"errors"
+
+	"google.golang.org/grpc"
+)
+
+// Client wraps ObjectServiceClient
+// with pre-defined configurations.
+type Client struct {
+	*cfg
+
+	client ObjectServiceClient
+}
+
+// Option represents Client option.
+type Option func(*cfg)
+
+type cfg struct {
+	callOpts []grpc.CallOption
+}
+
+// ErrNilObjectServiceClient is returned by functions that expect
+// a non-nil ObjectServiceClient, but received nil.
+var ErrNilObjectServiceClient = errors.New("object gRPC client is nil")
+
+func defaultCfg() *cfg {
+	return new(cfg)
+}
+
+// NewClient creates, initializes and returns a new Client instance.
+//
+// Options are applied one by one in order.
+func NewClient(c ObjectServiceClient, opts ...Option) (*Client, error) {
+	if c == nil {
+		return nil, ErrNilObjectServiceClient
+	}
+
+	cfg := defaultCfg()
+	for i := range opts {
+		opts[i](cfg)
+	}
+
+	return &Client{
+		cfg:    cfg,
+		client: c,
+	}, nil
+}
+
+func (c *Client) Get(ctx context.Context, req *GetRequest) (ObjectService_GetClient, error) {
+	return c.client.Get(ctx, req, c.callOpts...)
+}
+
+func (c *Client) Put(ctx context.Context) (ObjectService_PutClient, error) {
+	return c.client.Put(ctx, c.callOpts...)
+}
+
+func (c *Client) Head(ctx context.Context, req *HeadRequest) (*HeadResponse, error) {
+	return c.client.Head(ctx, req, c.callOpts...)
+}
+
+func (c *Client) Search(ctx context.Context, req *SearchRequest) (ObjectService_SearchClient, error) {
+	return c.client.Search(ctx, req, c.callOpts...)
+}
+
+func (c *Client) Delete(ctx context.Context, req *DeleteRequest) (*DeleteResponse, error) {
+	return c.client.Delete(ctx, req, c.callOpts...)
+}
+
+func (c *Client) GetRange(ctx context.Context, req *GetRangeRequest) (ObjectService_GetRangeClient, error) {
+	return c.client.GetRange(ctx, req, c.callOpts...)
+}
+
+func (c *Client) GetRangeHash(ctx context.Context, req *GetRangeHashRequest) (*GetRangeHashResponse, error) {
+	return c.client.GetRangeHash(ctx, req, c.callOpts...)
+}
+
+// WithCallOptions returns Option that configures
+// Client to attach call options to each rpc call.
+func WithCallOptions(opts []grpc.CallOption) Option {
+	return func(c *cfg) {
+		c.callOpts = opts
+	}
+}