Update dependencies

vendor/github.com/akutz/memconn/.gitignore

@@ -0,0 +1,414 @@
+*.a
+*.out
+*.test
+*.stderr
+*.stdout
+*.log
+.vscode/
+
+# Created by https://www.gitignore.io
+
+### Windows ###
+# Windows image file caches
+Thumbs.db
+ehthumbs.db
+
+# Folder config file
+Desktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
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+
+# Windows shortcuts
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+
+
+### OSX ###
+.DS_Store
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+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
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+
+# Directories potentially created on remote AFP share
+.AppleDB
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+Network Trash Folder
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+
+### Eclipse ###
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+*~.nib
+local.properties
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+# Eclipse Core
+.project
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+# External tool builders
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+
+# Locally stored "Eclipse launch configurations"
+*.launch
+
+# CDT-specific
+.cproject
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+# JDT-specific (Eclipse Java Development Tools)
+.classpath
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+# PDT-specific
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+# sbteclipse plugin
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+# TeXlipse plugin
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+### Go ###
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+*.o
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+
+# Folders
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+# Architecture specific extensions/prefixes
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+
+*.cgo1.go
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+_cgo_defun.c
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+
+*.exe
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+
+
+### SublimeText ###
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+# workspace files are user-specific
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+# project files should be checked into the repository, unless a significant
+# proportion of contributors will probably not be using SublimeText
+# *.sublime-project
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+# sftp configuration file
+sftp-config.json
+
+
+### VisualStudio ###
+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+
+# User-specific files
+*.suo
+*.user
+*.userosscache
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+# Visual Studo 2015 cache/options directory
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+# MSTest test Results
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+# NUNIT
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+TestResult.xml
+
+# Build Results of an ATL Project
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+# Chutzpah Test files
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+# Installshield output folder
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+
+# DocProject is a documentation generator add-in
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+
+# Click-Once directory
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+# Publish Web Output
+*.[Pp]ublish.xml
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+# TODO: Comment the next line if you want to checkin your web deploy settings
+# but database connection strings (with potential passwords) will be unencrypted
+*.pubxml
+*.publishproj
+
+# NuGet Packages
+*.nupkg
+# The packages folder can be ignored because of Package Restore
+**/packages/*
+# except build/, which is used as an MSBuild target.
+!**/packages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/packages/repositories.config
+
+# Windows Azure Build Output
+csx/
+*.build.csdef
+
+# Windows Store app package directory
+AppPackages/
+
+# Others
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+ClientBin/
+[Ss]tyle[Cc]op.*
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+*~
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+*.dbproj.schemaview
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+node_modules/
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+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+
+# SQL Server files
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+*.ldf
+
+# Business Intelligence projects
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+
+# Microsoft Fakes
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+# Node.js Tools for Visual Studio
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+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt
+
+
+### Maven ###
+target/
+pom.xml.tag
+pom.xml.releaseBackup
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+release.properties
+dependency-reduced-pom.xml
+buildNumber.properties
+
+
+### Java ###
+*.class
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.ear
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+
+### Intellij ###
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm
+
+*.iml
+
+## Directory-based project format:
+.idea/
+# if you remove the above rule, at least ignore the following:
+
+# User-specific stuff:
+# .idea/workspace.xml
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+# Mongo Explorer plugin:
+# .idea/mongoSettings.xml
+
+## File-based project format:
+*.ipr
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+
+## Plugin-specific files:
+
+# IntelliJ
+/out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties

vendor/github.com/akutz/memconn/.travis.yml

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+# Setting "sudo" to false forces Travis-CI to use its
+# container-based build infrastructure, which has shorter
+# queue times.
+sudo: false
+
+# Use the newer Travis-CI build templates based on the
+# Debian Linux distribution "Trusty" release.
+dist: trusty
+
+# Select Go as the language used to run the buid.
+language: go
+go:
+  - 1.8.x
+  - 1.9.x
+  - 1.10.x
+go_import_path: github.com/akutz/memconn
+
+install: true
+script:
+  - make test
+  - make benchmark

vendor/github.com/akutz/memconn/LICENSE

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+
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vendor/github.com/akutz/memconn/Makefile

@@ -0,0 +1,31 @@
+SHELL := /bin/bash
+
+all: build
+
+build: memconn.a
+memconn.a: $(filter-out %_test.go, $(wildcard *.go))
+	go build -o $@
+
+GO_VERSION ?= 1.9.4
+IMPORT_PATH := github.com/akutz/memconn
+
+docker-run:
+	docker run --rm -it \
+      -v $$(pwd):/go/src/$(IMPORT_PATH) \
+      golang:$(GO_VERSION) \
+      make -C /go/src/$(IMPORT_PATH) $(MAKE_TARGET)
+
+BENCH ?= .
+
+benchmark:
+	go test -bench $(BENCH) -run Bench -benchmem .
+
+benchmark-go1.9:
+	MAKE_TARGET=benchmark $(MAKE) docker-run
+
+test:
+	go test
+	go test -race -run 'Race$$'
+
+test-go1.9:
+	MAKE_TARGET=test $(MAKE) docker-run

vendor/github.com/akutz/memconn/README.md

@@ -0,0 +1,38 @@
+# MemConn [![GoDoc](https://godoc.org/github.com/akutz/memconn?status.svg)](http://godoc.org/github.com/akutz/memconn) [![Build Status](http://travis-ci.org/akutz/memconn.svg?branch=master)](https://travis-ci.org/akutz/memconn) [![Go Report Card](http://goreportcard.com/badge/akutz/memconn)](http://goreportcard.com/report/akutz/memconn)
+MemConn provides named, in-memory network connections for Go.
+
+## Create a Server
+A new `net.Listener` used to serve HTTP, gRPC, etc. is created with
+`memconn.Listen`:
+
+```go
+lis, err := memconn.Listen("memu", "UniqueName")
+```
+
+## Creating a Client (Dial)
+Clients can dial any named connection:
+
+```go
+client, err := memconn.Dial("memu", "UniqueName")
+```
+
+## Network Types
+MemCon supports the following network types:
+
+| Network | Description |
+|---------|-------------|
+| `memb`  | A buffered, in-memory implementation of `net.Conn` |
+| `memu`  | An unbuffered, in-memory implementation of `net.Conn` |
+
+## Performance
+The benchmark results illustrate MemConn's performance versus TCP
+and UNIX domain sockets:
+
+![ops](https://imgur.com/o8mXla6.png "Ops (Larger is Better)")
+![ns/op](https://imgur.com/8YvPmMU.png "Nanoseconds/Op (Smaller is Better)")
+![B/op](https://imgur.com/vQSfIR2.png "Bytes/Op (Smaller is Better)")
+![allocs/op](https://imgur.com/k263257.png "Allocs/Op (Smaller is Better)")
+
+MemConn is more performant than TCP and UNIX domain sockets with respect
+to the CPU. While MemConn does allocate more memory, this is to be expected
+since MemConn is an in-memory implementation of the `net.Conn` interface.

vendor/github.com/akutz/memconn/VERSION

@@ -0,0 +1 @@
+0.1.0

vendor/github.com/akutz/memconn/memconn.go

@@ -0,0 +1,110 @@
+package memconn
+
+import (
+	"context"
+	"net"
+)
+
+const (
+	// networkMemb is a buffered network connection. Write operations
+	// do not block as they are are buffered instead of waiting on a
+	// matching Read operation.
+	networkMemb = "memb"
+
+	// networkMemu is an unbuffered network connection. Write operations
+	// block until they are matched by a Read operation on the other side
+	// of the connected pipe.
+	networkMemu = "memu"
+
+	// addrLocalhost is a reserved address name. It is used when a
+	// Listen variant omits the local address or a Dial variant omits
+	// the remote address.
+	addrLocalhost = "localhost"
+)
+
+// provider is the package's default provider instance. All of the
+// package-level functions interact with this object.
+var provider Provider
+
+// MapNetwork enables mapping the network value provided to this Provider's
+// Dial and Listen functions from the specified "from" value to the
+// specified "to" value.
+//
+// For example, calling MapNetwork("tcp", "memu") means a subsequent
+// Dial("tcp", "address") gets translated to Dial("memu", "address").
+//
+// Calling MapNetwork("tcp", "") removes any previous translation for
+// the "tcp" network.
+func MapNetwork(from, to string) {
+	provider.MapNetwork(from, to)
+}
+
+// Listen begins listening at address for the specified network.
+//
+// Known networks are "memb" (memconn buffered) and "memu" (memconn unbuffered).
+//
+// When the specified address is already in use on the specified
+// network an error is returned.
+//
+// When the provided network is unknown the operation defers to
+// net.Dial.
+func Listen(network, address string) (net.Listener, error) {
+	return provider.Listen(network, address)
+}
+
+// ListenMem begins listening at laddr.
+//
+// Known networks are "memb" (memconn buffered) and "memu" (memconn unbuffered).
+//
+// If laddr is nil then ListenMem listens on "localhost" on the
+// specified network.
+func ListenMem(network string, laddr *Addr) (*Listener, error) {
+	return provider.ListenMem(network, laddr)
+}
+
+// Dial dials a named connection.
+//
+// Known networks are "memb" (memconn buffered) and "memu" (memconn unbuffered).
+//
+// When the provided network is unknown the operation defers to
+// net.Dial.
+func Dial(network, address string) (net.Conn, error) {
+	return provider.Dial(network, address)
+}
+
+// DialContext dials a named connection using a
+// Go context to provide timeout behavior.
+//
+// Please see Dial for more information.
+func DialContext(
+	ctx context.Context,
+	network, address string) (net.Conn, error) {
+
+	return provider.DialContext(ctx, network, address)
+}
+
+// DialMem dials a named connection.
+//
+// Known networks are "memb" (memconn buffered) and "memu" (memconn unbuffered).
+//
+// If laddr is nil then a new address is generated using
+// time.Now().UnixNano(). Please note that client addresses are
+// not required to be unique.
+//
+// If raddr is nil then the "localhost" endpoint is used on the
+// specified network.
+func DialMem(network string, laddr, raddr *Addr) (*Conn, error) {
+	return provider.DialMem(network, laddr, raddr)
+}
+
+// DialMemContext dials a named connection using a
+// Go context to provide timeout behavior.
+//
+// Please see DialMem for more information.
+func DialMemContext(
+	ctx context.Context,
+	network string,
+	laddr, raddr *Addr) (*Conn, error) {
+
+	return provider.DialMemContext(ctx, network, laddr, raddr)
+}

vendor/github.com/akutz/memconn/memconn_addr.go

@@ -0,0 +1,25 @@
+package memconn
+
+// Addr represents the address of an in-memory endpoint.
+type Addr struct {
+	// Name is the name of the endpoint.
+	Name string
+
+	network string
+}
+
+// Buffered indicates whether or not the address refers to a buffered
+// network type.
+func (a Addr) Buffered() bool {
+	return a.network == networkMemb
+}
+
+// Network returns the address's network.
+func (a Addr) Network() string {
+	return a.network
+}
+
+// String returns the address's name.
+func (a Addr) String() string {
+	return a.Name
+}

vendor/github.com/akutz/memconn/memconn_conn.go

@@ -0,0 +1,434 @@
+package memconn
+
+import (
+	"net"
+	"sync"
+	"time"
+)
+
+// Conn is an in-memory implementation of Golang's "net.Conn" interface.
+type Conn struct {
+	pipe
+
+	laddr Addr
+	raddr Addr
+
+	// buf contains information about the connection's buffer state if
+	// the connection is buffered. Otherwise this field is nil.
+	buf *bufConn
+}
+
+type bufConn struct {
+	// Please see the SetCopyOnWrite function for more information.
+	cow bool
+
+	// Please see the SetBufferSize function for more information.
+	max uint64
+
+	// cur is the amount of buffered, pending Write data
+	cur uint64
+
+	// cond is a condition used to wait when writing buffered data
+	cond sync.Cond
+
+	// mu is the mutex used by the condition. The mutex is exposed
+	// directly in order to access RLock and RUnlock for getting the
+	// buffer size.
+	mu sync.RWMutex
+
+	// errs is the error channel returned by the Errs() function and
+	// used to report erros that occur as a result of buffered write
+	// operations. If the pipe does not use buffered writes then this
+	// field will always be nil.
+	errs chan error
+
+	// Please see the SetCloseTimeout function for more information.
+	closeTimeout time.Duration
+}
+
+func makeNewConns(network string, laddr, raddr Addr) (*Conn, *Conn) {
+	// This code is duplicated from the Pipe() function from the file
+	// "memconn_pipe.go". The reason for the duplication is to optimize
+	// the performance by removing the need to wrap the *pipe values as
+	// interface{} objects out of the Pipe() function and assert them
+	// back as *pipe* objects in this function.
+	cb1 := make(chan []byte)
+	cb2 := make(chan []byte)
+	cn1 := make(chan int)
+	cn2 := make(chan int)
+	done1 := make(chan struct{})
+	done2 := make(chan struct{})
+
+	// Wrap the pipes with Conn to support:
+	//
+	//   * The correct address information for the functions LocalAddr()
+	//     and RemoteAddr() return the
+	//   * Errors returns from the internal pipe are checked and
+	//     have their internal OpError addr information replaced with
+	//     the correct address information.
+	//   * A channel can be setup to cause the event of the Listener
+	//     closing closes the remoteConn immediately.
+	//   * Buffered writes
+	local := &Conn{
+		pipe: pipe{
+			rdRx: cb1, rdTx: cn1,
+			wrTx: cb2, wrRx: cn2,
+			localDone: done1, remoteDone: done2,
+			readDeadline:  makePipeDeadline(),
+			writeDeadline: makePipeDeadline(),
+		},
+		laddr: laddr,
+		raddr: raddr,
+	}
+	remote := &Conn{
+		pipe: pipe{
+			rdRx: cb2, rdTx: cn2,
+			wrTx: cb1, wrRx: cn1,
+			localDone: done2, remoteDone: done1,
+			readDeadline:  makePipeDeadline(),
+			writeDeadline: makePipeDeadline(),
+		},
+		laddr: raddr,
+		raddr: laddr,
+	}
+
+	if laddr.Buffered() {
+		local.buf = &bufConn{
+			errs:         make(chan error),
+			closeTimeout: 10 * time.Second,
+		}
+		local.buf.cond.L = &local.buf.mu
+	}
+
+	if raddr.Buffered() {
+		remote.buf = &bufConn{
+			errs:         make(chan error),
+			closeTimeout: 10 * time.Second,
+		}
+		remote.buf.cond.L = &remote.buf.mu
+	}
+
+	return local, remote
+}
+
+// LocalBuffered returns a flag indicating whether or not the local side
+// of the connection is buffered.
+func (c *Conn) LocalBuffered() bool {
+	return c.laddr.Buffered()
+}
+
+// RemoteBuffered returns a flag indicating whether or not the remote side
+// of the connection is buffered.
+func (c *Conn) RemoteBuffered() bool {
+	return c.raddr.Buffered()
+}
+
+// BufferSize gets the number of bytes allowed to be queued for
+// asynchrnous Write operations.
+//
+// Please note that this function will always return zero for unbuffered
+// connections.
+//
+// Please see the function SetBufferSize for more information.
+func (c *Conn) BufferSize() uint64 {
+	if c.laddr.Buffered() {
+		c.buf.mu.RLock()
+		defer c.buf.mu.RUnlock()
+		return c.buf.max
+	}
+	return 0
+}
+
+// SetBufferSize sets the number of bytes allowed to be queued for
+// asynchronous Write operations. Once the amount of data pending a Write
+// operation exceeds the specified size, subsequent Writes will
+// block until the queued data no longer exceeds the allowed ceiling.
+//
+// A value of zero means no maximum is defined.
+//
+// If a Write operation's payload length exceeds the buffer size
+// (except for zero) then the Write operation is handled synchronously.
+//
+// Please note that setting the buffer size has no effect on unbuffered
+// connections.
+func (c *Conn) SetBufferSize(i uint64) {
+	if c.laddr.Buffered() {
+		c.buf.cond.L.Lock()
+		defer c.buf.cond.L.Unlock()
+		c.buf.max = i
+	}
+}
+
+// CloseTimeout gets the time.Duration value used when closing buffered
+// connections.
+//
+// Please note that this function will always return zero for
+// unbuffered connections.
+//
+// Please see the function SetCloseTimeout for more information.
+func (c *Conn) CloseTimeout() time.Duration {
+	if c.laddr.Buffered() {
+		c.buf.mu.RLock()
+		defer c.buf.mu.RUnlock()
+		return c.buf.closeTimeout
+	}
+	return 0
+}
+
+// SetCloseTimeout sets a time.Duration value used by the Close function
+// to determine the amount of time to wait for pending, buffered Writes
+// to complete before closing the connection.
+//
+// The default timeout value is 10 seconds. A zero value does not
+// mean there is no timeout, rather it means the timeout is immediate.
+//
+// Please note that setting this value has no effect on unbuffered
+// connections.
+func (c *Conn) SetCloseTimeout(duration time.Duration) {
+	if c.laddr.Buffered() {
+		c.buf.cond.L.Lock()
+		defer c.buf.cond.L.Unlock()
+		c.buf.closeTimeout = duration
+	}
+}
+
+// CopyOnWrite gets a flag indicating whether or not copy-on-write is
+// enabled for this connection.
+//
+// Please note that this function will always return false for
+// unbuffered connections.
+//
+// Please see the function SetCopyOnWrite for more information.
+func (c *Conn) CopyOnWrite() bool {
+	if c.laddr.Buffered() {
+		c.buf.mu.RLock()
+		defer c.buf.mu.RUnlock()
+		return c.buf.cow
+	}
+	return false
+}
+
+// SetCopyOnWrite sets a flag indicating whether or not copy-on-write
+// is enabled for this connection.
+//
+// When a connection is buffered, data submitted to a Write operation
+// is processed in a goroutine and the function returns control to the
+// caller immediately. Because of this, it's possible to modify the
+// data provided to the Write function before or during the actual
+// Write operation. Enabling copy-on-write causes the payload to be
+// copied to a new buffer before control is returned to the caller.
+//
+// Please note that enabling copy-on-write will double the amount of
+// memory required for all Write operations.
+//
+// Please note that enabling copy-on-write has no effect on unbuffered
+// connections.
+func (c *Conn) SetCopyOnWrite(enabled bool) {
+	if c.laddr.Buffered() {
+		c.buf.cond.L.Lock()
+		defer c.buf.cond.L.Unlock()
+		c.buf.cow = enabled
+	}
+}
+
+// LocalAddr implements the net.Conn LocalAddr method.
+func (c *Conn) LocalAddr() net.Addr {
+	return c.laddr
+}
+
+// RemoteAddr implements the net.Conn RemoteAddr method.
+func (c *Conn) RemoteAddr() net.Addr {
+	return c.raddr
+}
+
+// Close implements the net.Conn Close method.
+func (c *Conn) Close() error {
+	c.pipe.once.Do(func() {
+
+		// Buffered connections will attempt to wait until all
+		// pending Writes are completed, until the specified
+		// timeout value has elapsed, or until the remote side
+		// of the connection is closed.
+		if c.laddr.Buffered() {
+			c.buf.mu.RLock()
+			timeout := c.buf.closeTimeout
+			c.buf.mu.RUnlock()
+
+			// Set up a channel that is closed when the specified
+			// timer elapses.
+			timeoutDone := make(chan struct{})
+			if timeout == 0 {
+				close(timeoutDone)
+			} else {
+				time.AfterFunc(timeout, func() { close(timeoutDone) })
+			}
+
+			// Set up a channel that is closed when the number of
+			// pending bytes is zero.
+			writesDone := make(chan struct{})
+			go func() {
+				c.buf.cond.L.Lock()
+				for c.buf.cur > 0 {
+					c.buf.cond.Wait()
+				}
+				close(writesDone)
+				c.buf.cond.L.Unlock()
+			}()
+
+			// Wait to close the connection.
+			select {
+			case <-writesDone:
+			case <-timeoutDone:
+			case <-c.pipe.remoteDone:
+			}
+		}
+
+		close(c.pipe.localDone)
+	})
+	return nil
+}
+
+// Errs returns a channel that receives errors that may occur as the
+// result of buffered write operations.
+//
+// This function will always return nil for unbuffered connections.
+//
+// Please note that the channel returned by this function is not closed
+// when the connection is closed. This is because errors may continue
+// to be sent over this channel as the result of asynchronous writes
+// occurring after the connection is closed. Therefore this channel
+// should not be used to determine when the connection is closed.
+func (c *Conn) Errs() <-chan error {
+	return c.buf.errs
+}
+
+// Read implements the net.Conn Read method.
+func (c *Conn) Read(b []byte) (int, error) {
+	n, err := c.pipe.Read(b)
+	if err != nil {
+		if e, ok := err.(*net.OpError); ok {
+			e.Addr = c.raddr
+			e.Source = c.laddr
+			return n, e
+		}
+		return n, &net.OpError{
+			Op:     "read",
+			Addr:   c.raddr,
+			Source: c.laddr,
+			Net:    c.raddr.Network(),
+			Err:    err,
+		}
+	}
+	return n, nil
+}
+
+// Write implements the net.Conn Write method.
+func (c *Conn) Write(b []byte) (int, error) {
+	if c.laddr.Buffered() {
+		return c.writeAsync(b)
+	}
+	return c.writeSync(b)
+}
+
+func (c *Conn) writeSync(b []byte) (int, error) {
+	n, err := c.pipe.Write(b)
+	if err != nil {
+		if e, ok := err.(*net.OpError); ok {
+			e.Addr = c.raddr
+			e.Source = c.laddr
+			return n, e
+		}
+		return n, &net.OpError{
+			Op:     "write",
+			Addr:   c.raddr,
+			Source: c.laddr,
+			Net:    c.raddr.Network(),
+			Err:    err,
+		}
+	}
+	return n, nil
+}
+
+// writeAsync performs the Write operation in a goroutine. This
+// behavior means the Write operation is not blocking, but also means
+// that when Write operations fail the associated error is not returned
+// from this function.
+func (c *Conn) writeAsync(b []byte) (int, error) {
+	// Perform a synchronous Write if the connection has a non-zero
+	// value for the maximum allowed buffer size and if the size of
+	// the payload exceeds that maximum value.
+	if c.buf.max > 0 && uint64(len(b)) > c.buf.max {
+		return c.writeSync(b)
+	}
+
+	// Block the operation from proceeding until there is available
+	// buffer space.
+	c.buf.cond.L.Lock()
+	for c.buf.max > 0 && uint64(len(b))+c.buf.cur > c.buf.max {
+		c.buf.cond.Wait()
+	}
+
+	// Copy the buffer if the connection uses copy-on-write.
+	cb := b
+	if c.buf.cow {
+		cb = make([]byte, len(b))
+		copy(cb, b)
+	}
+
+	// Update the amount of active data being written.
+	c.buf.cur = c.buf.cur + uint64(len(cb))
+
+	c.buf.cond.L.Unlock()
+
+	go func() {
+		if _, err := c.writeSync(cb); err != nil {
+			go func() { c.buf.errs <- err }()
+		}
+
+		// Decrement the enqueued buffer size and signal a blocked
+		// goroutine that it may proceed
+		c.buf.cond.L.Lock()
+		c.buf.cur = c.buf.cur - uint64(len(cb))
+		c.buf.cond.L.Unlock()
+		c.buf.cond.Signal()
+	}()
+	return len(cb), nil
+}
+
+// SetReadDeadline implements the net.Conn SetReadDeadline method.
+func (c *Conn) SetReadDeadline(t time.Time) error {
+	if err := c.pipe.SetReadDeadline(t); err != nil {
+		if e, ok := err.(*net.OpError); ok {
+			e.Addr = c.laddr
+			e.Source = c.laddr
+			return e
+		}
+		return &net.OpError{
+			Op:     "setReadDeadline",
+			Addr:   c.laddr,
+			Source: c.laddr,
+			Net:    c.laddr.Network(),
+			Err:    err,
+		}
+	}
+	return nil
+}
+
+// SetWriteDeadline implements the net.Conn SetWriteDeadline method.
+func (c *Conn) SetWriteDeadline(t time.Time) error {
+	if err := c.pipe.SetWriteDeadline(t); err != nil {
+		if e, ok := err.(*net.OpError); ok {
+			e.Addr = c.laddr
+			e.Source = c.laddr
+			return e
+		}
+		return &net.OpError{
+			Op:     "setWriteDeadline",
+			Addr:   c.laddr,
+			Source: c.laddr,
+			Net:    c.laddr.Network(),
+			Err:    err,
+		}
+	}
+	return nil
+}

vendor/github.com/akutz/memconn/memconn_listener.go

@@ -0,0 +1,105 @@
+package memconn
+
+import (
+	"context"
+	"errors"
+	"net"
+	"sync"
+)
+
+// Listener implements the net.Listener interface.
+type Listener struct {
+	addr Addr
+	once sync.Once
+	rcvr chan *Conn
+	done chan struct{}
+	rmvd chan struct{}
+}
+
+func (l *Listener) dial(
+	ctx context.Context,
+	network string,
+	laddr, raddr Addr) (*Conn, error) {
+
+	local, remote := makeNewConns(network, laddr, raddr)
+
+	// TODO Figure out if this logic is valid.
+	//
+	// Start a goroutine that closes the remote side of the connection
+	// as soon as the listener's done channel is no longer blocked.
+	//go func() {
+	//	<-l.done
+	//	remoteConn.Close()
+	//}()
+
+	// If the provided context is nill then announce a new connection
+	// by placing the new remoteConn onto the rcvr channel. An Accept
+	// call from this listener will remove the remoteConn from the channel.
+	if ctx == nil {
+		l.rcvr <- remote
+		return local, nil
+	}
+
+	// Announce a new connection by placing the new remoteConn
+	// onto the rcvr channel. An Accept call from this listener will
+	// remove the remoteConn from the channel. However, if that does
+	// not occur by the time the context times out / is cancelled, then
+	// an error is returned.
+	select {
+	case l.rcvr <- remote:
+		return local, nil
+	case <-ctx.Done():
+		local.Close()
+		remote.Close()
+		return nil, &net.OpError{
+			Addr:   raddr,
+			Source: laddr,
+			Net:    network,
+			Op:     "dial",
+			Err:    ctx.Err(),
+		}
+	}
+}
+
+// Accept implements the net.Listener Accept method.
+func (l *Listener) Accept() (net.Conn, error) {
+	return l.AcceptMemConn()
+}
+
+// AcceptMemConn implements the net.Listener Accept method logic and
+// returns a *memconn.Conn object.
+func (l *Listener) AcceptMemConn() (*Conn, error) {
+	select {
+	case remoteConn, ok := <-l.rcvr:
+		if ok {
+			return remoteConn, nil
+		}
+		return nil, &net.OpError{
+			Addr:   l.addr,
+			Source: l.addr,
+			Net:    l.addr.Network(),
+			Err:    errors.New("listener closed"),
+		}
+	case <-l.done:
+		return nil, &net.OpError{
+			Addr:   l.addr,
+			Source: l.addr,
+			Net:    l.addr.Network(),
+			Err:    errors.New("listener closed"),
+		}
+	}
+}
+
+// Close implements the net.Listener Close method.
+func (l *Listener) Close() error {
+	l.once.Do(func() {
+		close(l.done)
+		<-l.rmvd
+	})
+	return nil
+}
+
+// Addr implements the net.Listener Addr method.
+func (l *Listener) Addr() net.Addr {
+	return l.addr
+}

vendor/github.com/akutz/memconn/memconn_pipe.go

@@ -0,0 +1,265 @@
+// This file was copied from Go stdlib "net/pipe.go"
+// and modified in order to optimally support:
+//
+//     * Buffered writes
+//     * Custom local and remote address values
+//     * Error values that follow net.Conn's rules regarding
+//       net.OpError
+//
+// The above features could be implemented using the "net.Conn" values
+// returned from the function "net.Pipe", but much of the same code
+// would need to be duplicated regarding deadlines, done semantics, etc.
+// Using the private "pipe" struct as the basis of a new, composite type
+// is much more performant.
+//
+// FYI, the reason a new, composite type is used instead of modifying
+// the existing type, "pipe", is to make it easier to replace this
+// file with whatever changes Go stdlib make make to "net/pipe.go" in
+// the future.
+//
+// This file is a Golang stdlib type and so the Go license is included:
+//
+//     Copyright 2010 The Go Authors. All rights reserved.
+//     Use of this source code is governed by a BSD-style
+//     license that can be found in the LICENSE file.
+
+package memconn
+
+import (
+	"io"
+	"net"
+	"sync"
+	"time"
+)
+
+// pipeDeadline is an abstraction for handling timeouts.
+type pipeDeadline struct {
+	mu     sync.Mutex // Guards timer and cancel
+	timer  *time.Timer
+	cancel chan struct{} // Must be non-nil
+}
+
+func makePipeDeadline() pipeDeadline {
+	return pipeDeadline{cancel: make(chan struct{})}
+}
+
+// set sets the point in time when the deadline will time out.
+// A timeout event is signaled by closing the channel returned by waiter.
+// Once a timeout has occurred, the deadline can be refreshed by specifying a
+// t value in the future.
+//
+// A zero value for t prevents timeout.
+func (d *pipeDeadline) set(t time.Time) {
+	d.mu.Lock()
+	defer d.mu.Unlock()
+
+	if d.timer != nil && !d.timer.Stop() {
+		<-d.cancel // Wait for the timer callback to finish and close cancel
+	}
+	d.timer = nil
+
+	// Time is zero, then there is no deadline.
+	closed := isClosedChan(d.cancel)
+	if t.IsZero() {
+		if closed {
+			d.cancel = make(chan struct{})
+		}
+		return
+	}
+
+	// Time in the future, setup a timer to cancel in the future.
+	if dur := time.Until(t); dur > 0 {
+		if closed {
+			d.cancel = make(chan struct{})
+		}
+		d.timer = time.AfterFunc(dur, func() {
+			close(d.cancel)
+		})
+		return
+	}
+
+	// Time in the past, so close immediately.
+	if !closed {
+		close(d.cancel)
+	}
+}
+
+// wait returns a channel that is closed when the deadline is exceeded.
+func (d *pipeDeadline) wait() chan struct{} {
+	d.mu.Lock()
+	defer d.mu.Unlock()
+	return d.cancel
+}
+
+func isClosedChan(c <-chan struct{}) bool {
+	select {
+	case <-c:
+		return true
+	default:
+		return false
+	}
+}
+
+type timeoutError struct{}
+
+func (timeoutError) Error() string   { return "deadline exceeded" }
+func (timeoutError) Timeout() bool   { return true }
+func (timeoutError) Temporary() bool { return true }
+
+type pipeAddr struct{}
+
+func (pipeAddr) Network() string { return "pipe" }
+func (pipeAddr) String() string  { return "pipe" }
+
+type pipe struct {
+	wrMu sync.Mutex // Serialize Write operations
+
+	// Used by local Read to interact with remote Write.
+	// Successful receive on rdRx is always followed by send on rdTx.
+	rdRx <-chan []byte
+	rdTx chan<- int
+
+	// Used by local Write to interact with remote Read.
+	// Successful send on wrTx is always followed by receive on wrRx.
+	wrTx chan<- []byte
+	wrRx <-chan int
+
+	once       sync.Once // Protects closing localDone
+	localDone  chan struct{}
+	remoteDone <-chan struct{}
+
+	readDeadline  pipeDeadline
+	writeDeadline pipeDeadline
+}
+
+// Pipe creates a synchronous, in-memory, full duplex
+// network connection; both ends implement the Conn interface.
+// Reads on one end are matched with writes on the other,
+// copying data directly between the two; there is no internal
+// buffering.
+func Pipe() (net.Conn, net.Conn) {
+	cb1 := make(chan []byte)
+	cb2 := make(chan []byte)
+	cn1 := make(chan int)
+	cn2 := make(chan int)
+	done1 := make(chan struct{})
+	done2 := make(chan struct{})
+
+	p1 := &pipe{
+		rdRx: cb1, rdTx: cn1,
+		wrTx: cb2, wrRx: cn2,
+		localDone: done1, remoteDone: done2,
+		readDeadline:  makePipeDeadline(),
+		writeDeadline: makePipeDeadline(),
+	}
+	p2 := &pipe{
+		rdRx: cb2, rdTx: cn2,
+		wrTx: cb1, wrRx: cn1,
+		localDone: done2, remoteDone: done1,
+		readDeadline:  makePipeDeadline(),
+		writeDeadline: makePipeDeadline(),
+	}
+	return p1, p2
+}
+
+func (*pipe) LocalAddr() net.Addr  { return pipeAddr{} }
+func (*pipe) RemoteAddr() net.Addr { return pipeAddr{} }
+
+func (p *pipe) Read(b []byte) (int, error) {
+	n, err := p.read(b)
+	if err != nil && err != io.EOF && err != io.ErrClosedPipe {
+		err = &net.OpError{Op: "read", Net: "pipe", Err: err}
+	}
+	return n, err
+}
+
+func (p *pipe) read(b []byte) (n int, err error) {
+	switch {
+	case isClosedChan(p.localDone):
+		return 0, io.ErrClosedPipe
+	case isClosedChan(p.remoteDone):
+		return 0, io.EOF
+	case isClosedChan(p.readDeadline.wait()):
+		return 0, timeoutError{}
+	}
+
+	select {
+	case bw := <-p.rdRx:
+		nr := copy(b, bw)
+		p.rdTx <- nr
+		return nr, nil
+	case <-p.localDone:
+		return 0, io.ErrClosedPipe
+	case <-p.remoteDone:
+		return 0, io.EOF
+	case <-p.readDeadline.wait():
+		return 0, timeoutError{}
+	}
+}
+
+func (p *pipe) Write(b []byte) (int, error) {
+	n, err := p.write(b)
+	if err != nil && err != io.ErrClosedPipe {
+		err = &net.OpError{Op: "write", Net: "pipe", Err: err}
+	}
+	return n, err
+}
+
+func (p *pipe) write(b []byte) (n int, err error) {
+	switch {
+	case isClosedChan(p.localDone):
+		return 0, io.ErrClosedPipe
+	case isClosedChan(p.remoteDone):
+		return 0, io.ErrClosedPipe
+	case isClosedChan(p.writeDeadline.wait()):
+		return 0, timeoutError{}
+	}
+
+	p.wrMu.Lock() // Ensure entirety of b is written together
+	defer p.wrMu.Unlock()
+	for once := true; once || len(b) > 0; once = false {
+		select {
+		case p.wrTx <- b:
+			nw := <-p.wrRx
+			b = b[nw:]
+			n += nw
+		case <-p.localDone:
+			return n, io.ErrClosedPipe
+		case <-p.remoteDone:
+			return n, io.ErrClosedPipe
+		case <-p.writeDeadline.wait():
+			return n, timeoutError{}
+		}
+	}
+	return n, nil
+}
+
+func (p *pipe) SetDeadline(t time.Time) error {
+	if isClosedChan(p.localDone) || isClosedChan(p.remoteDone) {
+		return io.ErrClosedPipe
+	}
+	p.readDeadline.set(t)
+	p.writeDeadline.set(t)
+	return nil
+}
+
+func (p *pipe) SetReadDeadline(t time.Time) error {
+	if isClosedChan(p.localDone) || isClosedChan(p.remoteDone) {
+		return io.ErrClosedPipe
+	}
+	p.readDeadline.set(t)
+	return nil
+}
+
+func (p *pipe) SetWriteDeadline(t time.Time) error {
+	if isClosedChan(p.localDone) || isClosedChan(p.remoteDone) {
+		return io.ErrClosedPipe
+	}
+	p.writeDeadline.set(t)
+	return nil
+}
+
+func (p *pipe) Close() error {
+	p.once.Do(func() { close(p.localDone) })
+	return nil
+}

vendor/github.com/akutz/memconn/memconn_provider.go

@@ -0,0 +1,245 @@
+package memconn
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net"
+	"sync"
+	"time"
+)
+
+// Provider is used to track named MemConn objects.
+type Provider struct {
+	nets      networkMap
+	listeners listenerCache
+}
+
+type listenerCache struct {
+	sync.RWMutex
+	cache map[string]*Listener
+}
+
+type networkMap struct {
+	sync.RWMutex
+	cache map[string]string
+}
+
+// MapNetwork enables mapping the network value provided to this Provider's
+// Dial and Listen functions from the specified "from" value to the
+// specified "to" value.
+//
+// For example, calling MapNetwork("tcp", "memu") means a subsequent
+// Dial("tcp", "address") gets translated to Dial("memu", "address").
+//
+// Calling MapNetwork("tcp", "") removes any previous translation for
+// the "tcp" network.
+func (p *Provider) MapNetwork(from, to string) {
+	p.nets.Lock()
+	defer p.nets.Unlock()
+	if p.nets.cache == nil {
+		p.nets.cache = map[string]string{}
+	}
+	if to == "" {
+		delete(p.nets.cache, from)
+		return
+	}
+	p.nets.cache[from] = to
+}
+
+func (p *Provider) mapNetwork(network string) string {
+	p.nets.RLock()
+	defer p.nets.RUnlock()
+	if to, ok := p.nets.cache[network]; ok {
+		return to
+	}
+	return network
+}
+
+// Listen begins listening at address for the specified network.
+//
+// Known networks are "memb" (memconn buffered) and "memu" (memconn unbuffered).
+//
+// When the specified address is already in use on the specified
+// network an error is returned.
+//
+// When the provided network is unknown the operation defers to
+// net.Dial.
+func (p *Provider) Listen(network, address string) (net.Listener, error) {
+	switch p.mapNetwork(network) {
+	case networkMemb, networkMemu:
+		return p.ListenMem(
+			network, &Addr{Name: address, network: network})
+	default:
+		return net.Listen(network, address)
+	}
+}
+
+// ListenMem begins listening at laddr.
+//
+// Known networks are "memb" (memconn buffered) and "memu" (memconn unbuffered).
+//
+// If laddr is nil then ListenMem listens on "localhost" on the
+// specified network.
+func (p *Provider) ListenMem(network string, laddr *Addr) (*Listener, error) {
+
+	switch p.mapNetwork(network) {
+	case networkMemb, networkMemu:
+		// If laddr is not specified then set it to the reserved name
+		// "localhost".
+		if laddr == nil {
+			laddr = &Addr{Name: addrLocalhost, network: network}
+		} else {
+			laddr.network = network
+		}
+	default:
+		return nil, &net.OpError{
+			Addr:   laddr,
+			Source: laddr,
+			Net:    network,
+			Op:     "listen",
+			Err:    errors.New("unknown network"),
+		}
+	}
+
+	p.listeners.Lock()
+	defer p.listeners.Unlock()
+
+	if p.listeners.cache == nil {
+		p.listeners.cache = map[string]*Listener{}
+	}
+
+	if _, ok := p.listeners.cache[laddr.Name]; ok {
+		return nil, &net.OpError{
+			Addr:   laddr,
+			Source: laddr,
+			Net:    network,
+			Op:     "listen",
+			Err:    errors.New("addr unavailable"),
+		}
+	}
+
+	l := &Listener{
+		addr: *laddr,
+		done: make(chan struct{}),
+		rmvd: make(chan struct{}),
+		rcvr: make(chan *Conn, 1),
+	}
+
+	// Start a goroutine that removes the listener from
+	// the cache once the listener is closed.
+	go func() {
+		<-l.done
+		p.listeners.Lock()
+		defer p.listeners.Unlock()
+		delete(p.listeners.cache, laddr.Name)
+		close(l.rmvd)
+	}()
+
+	p.listeners.cache[laddr.Name] = l
+	return l, nil
+}
+
+// Dial dials a named connection.
+//
+// Known networks are "memb" (memconn buffered) and "memu" (memconn unbuffered).
+//
+// When the provided network is unknown the operation defers to
+// net.Dial.
+func (p *Provider) Dial(network, address string) (net.Conn, error) {
+	return p.DialContext(nil, network, address)
+}
+
+// DialMem dials a named connection.
+//
+// Known networks are "memb" (memconn buffered) and "memu" (memconn unbuffered).
+//
+// If laddr is nil then a new address is generated using
+// time.Now().UnixNano(). Please note that client addresses are
+// not required to be unique.
+//
+// If raddr is nil then the "localhost" endpoint is used on the
+// specified network.
+func (p *Provider) DialMem(
+	network string, laddr, raddr *Addr) (*Conn, error) {
+
+	return p.DialMemContext(nil, network, laddr, raddr)
+}
+
+// DialContext dials a named connection using a
+// Go context to provide timeout behavior.
+//
+// Please see Dial for more information.
+func (p *Provider) DialContext(
+	ctx context.Context,
+	network, address string) (net.Conn, error) {
+
+	switch p.mapNetwork(network) {
+	case networkMemb, networkMemu:
+		return p.DialMemContext(
+			ctx, network, nil, &Addr{
+				Name:    address,
+				network: network,
+			})
+	default:
+		if ctx == nil {
+			return net.Dial(network, address)
+		}
+		return (&net.Dialer{}).DialContext(ctx, network, address)
+	}
+}
+
+// DialMemContext dials a named connection using a
+// Go context to provide timeout behavior.
+//
+// Please see DialMem for more information.
+func (p *Provider) DialMemContext(
+	ctx context.Context,
+	network string,
+	laddr, raddr *Addr) (*Conn, error) {
+
+	switch p.mapNetwork(network) {
+	case networkMemb, networkMemu:
+		// If laddr is not specified then create one with the current
+		// epoch in nanoseconds. This value need not be unique.
+		if laddr == nil {
+			laddr = &Addr{
+				Name:    fmt.Sprintf("%d", time.Now().UnixNano()),
+				network: network,
+			}
+		} else {
+			laddr.network = network
+		}
+		if raddr == nil {
+			raddr = &Addr{Name: addrLocalhost, network: network}
+		} else {
+			raddr.network = network
+		}
+	default:
+		return nil, &net.OpError{
+			Addr:   raddr,
+			Source: laddr,
+			Net:    network,
+			Op:     "dial",
+			Err:    errors.New("unknown network"),
+		}
+	}
+
+	p.listeners.RLock()
+	defer p.listeners.RUnlock()
+
+	if l, ok := p.listeners.cache[raddr.Name]; ok {
+		// Update the provided raddr with the actual network type used
+		// by the listener.
+		raddr.network = l.addr.network
+		return l.dial(ctx, network, *laddr, *raddr)
+	}
+
+	return nil, &net.OpError{
+		Addr:   raddr,
+		Source: laddr,
+		Net:    network,
+		Op:     "dial",
+		Err:    errors.New("unknown remote address"),
+	}
+}