Propagate context in Pipeline

cluster.go

@@ -1023,6 +1023,7 @@ func (c *ClusterClient) reaper(idleCheckFrequency time.Duration) {
 
 func (c *ClusterClient) Pipeline() Pipeliner {
 	pipe := Pipeline{
+		ctx:  c.ctx,
 		exec: c.processPipeline,
 	}
 	pipe.init()
@@ -1220,6 +1221,7 @@ func (c *ClusterClient) checkMovedErr(
 // TxPipeline acts like Pipeline, but wraps queued commands with MULTI/EXEC.
 func (c *ClusterClient) TxPipeline() Pipeliner {
 	pipe := Pipeline{
+		ctx:  c.ctx,
 		exec: c.processTxPipeline,
 	}
 	pipe.init()

commands.go

@@ -42,9 +42,7 @@ func appendArgs(dst, src []interface{}) []interface{} {
 		}
 	}
 
-	for _, v := range src {
-		dst = append(dst, v)
-	}
+	dst = append(dst, src...)
 	return dst
 }
 

pipeline.go

@@ -41,6 +41,7 @@ type Pipeline struct {
 	cmdable
 	statefulCmdable
 
+	ctx  context.Context
 	exec pipelineExecer
 
 	mu     sync.Mutex
@@ -98,7 +99,7 @@ func (c *Pipeline) discard() error {
 // Exec always returns list of commands and error of the first failed
 // command if any.
 func (c *Pipeline) Exec() ([]Cmder, error) {
-	return c.ExecContext(context.Background())
+	return c.ExecContext(c.ctx)
 }
 
 func (c *Pipeline) ExecContext(ctx context.Context) ([]Cmder, error) {

redis.go

@@ -136,7 +136,7 @@ func (c *baseClient) newConn(ctx context.Context) (*pool.Conn, error) {
 		return nil, err
 	}
 
-	err = c.initConn(cn)
+	err = c.initConn(ctx, cn)
 	if err != nil {
 		_ = c.connPool.CloseConn(cn)
 		return nil, err
@@ -169,7 +169,7 @@ func (c *baseClient) _getConn(ctx context.Context) (*pool.Conn, error) {
 		return nil, err
 	}
 
-	err = c.initConn(cn)
+	err = c.initConn(ctx, cn)
 	if err != nil {
 		c.connPool.Remove(cn)
 		return nil, err
@@ -202,7 +202,7 @@ func (c *baseClient) releaseConnStrict(cn *pool.Conn, err error) {
 	}
 }
 
-func (c *baseClient) initConn(cn *pool.Conn) error {
+func (c *baseClient) initConn(ctx context.Context, cn *pool.Conn) error {
 	if cn.Inited {
 		return nil
 	}
@@ -215,7 +215,7 @@ func (c *baseClient) initConn(cn *pool.Conn) error {
 		return nil
 	}
 
-	conn := newConn(c.opt, cn)
+	conn := newConn(ctx, c.opt, cn)
 	_, err := conn.Pipelined(func(pipe Pipeliner) error {
 		if c.opt.Password != "" {
 			pipe.Auth(c.opt.Password)
@@ -547,6 +547,7 @@ func (c *Client) Pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
 
 func (c *Client) Pipeline() Pipeliner {
 	pipe := Pipeline{
+		ctx:  c.ctx,
 		exec: c.processPipeline,
 	}
 	pipe.init()
@@ -560,6 +561,7 @@ func (c *Client) TxPipelined(fn func(Pipeliner) error) ([]Cmder, error) {
 // TxPipeline acts like Pipeline, but wraps queued commands with MULTI/EXEC.
 func (c *Client) TxPipeline() Pipeliner {
 	pipe := Pipeline{
+		ctx:  c.ctx,
 		exec: c.processTxPipeline,
 	}
 	pipe.init()
@@ -625,27 +627,35 @@ func (c *Client) PSubscribe(channels ...string) *PubSub {
 
 //------------------------------------------------------------------------------
 
-// Conn is like Client, but its pool contains single connection.
-type Conn struct {
+type conn struct {
 	baseClient
 	cmdable
 	statefulCmdable
 }
 
-func newConn(opt *Options, cn *pool.Conn) *Conn {
+// Conn is like Client, but its pool contains single connection.
+type Conn struct {
+	*conn
+	ctx context.Context
+}
+
+func newConn(ctx context.Context, opt *Options, cn *pool.Conn) *Conn {
 	c := Conn{
-		baseClient: baseClient{
-			opt:      opt,
-			connPool: pool.NewSingleConnPool(cn),
+		conn: &conn{
+			baseClient: baseClient{
+				opt:      opt,
+				connPool: pool.NewSingleConnPool(cn),
+			},
 		},
+		ctx: ctx,
 	}
 	c.cmdable = c.Process
 	c.statefulCmdable = c.Process
 	return &c
 }
 
 func (c *Conn) Process(cmd Cmder) error {
-	return c.ProcessContext(context.TODO(), cmd)
+	return c.ProcessContext(c.ctx, cmd)
 }
 
 func (c *Conn) ProcessContext(ctx context.Context, cmd Cmder) error {
@@ -658,6 +668,7 @@ func (c *Conn) Pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
 
 func (c *Conn) Pipeline() Pipeliner {
 	pipe := Pipeline{
+		ctx:  c.ctx,
 		exec: c.processPipeline,
 	}
 	pipe.init()
@@ -671,6 +682,7 @@ func (c *Conn) TxPipelined(fn func(Pipeliner) error) ([]Cmder, error) {
 // TxPipeline acts like Pipeline, but wraps queued commands with MULTI/EXEC.
 func (c *Conn) TxPipeline() Pipeliner {
 	pipe := Pipeline{
+		ctx:  c.ctx,
 		exec: c.processTxPipeline,
 	}
 	pipe.init()

ring.go

@@ -579,6 +579,7 @@ func (c *Ring) Pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
 
 func (c *Ring) Pipeline() Pipeliner {
 	pipe := Pipeline{
+		ctx:  c.ctx,
 		exec: c.processPipeline,
 	}
 	pipe.init()
@@ -597,6 +598,7 @@ func (c *Ring) TxPipelined(fn func(Pipeliner) error) ([]Cmder, error) {
 
 func (c *Ring) TxPipeline() Pipeliner {
 	pipe := Pipeline{
+		ctx:  c.ctx,
 		exec: c.processTxPipeline,
 	}
 	pipe.init()

tx.go

@@ -93,7 +93,7 @@ func (c *Tx) Watch(keys ...string) *StatusCmd {
 		args[1+i] = key
 	}
 	cmd := NewStatusCmd(args...)
-	c.Process(cmd)
+	_ = c.Process(cmd)
 	return cmd
 }
 
@@ -105,13 +105,14 @@ func (c *Tx) Unwatch(keys ...string) *StatusCmd {
 		args[1+i] = key
 	}
 	cmd := NewStatusCmd(args...)
-	c.Process(cmd)
+	_ = c.Process(cmd)
 	return cmd
 }
 
 // Pipeline creates a new pipeline. It is more convenient to use Pipelined.
 func (c *Tx) Pipeline() Pipeliner {
 	pipe := Pipeline{
+		ctx:  c.ctx,
 		exec: c.processTxPipeline,
 	}
 	pipe.init()