*: revendor

vendor/github.com/cockroachdb/cockroach-go/.gitignore

@@ -0,0 +1,3 @@
+*~
+.#*
+*.test

vendor/github.com/cockroachdb/cockroach-go/LICENSE

@@ -0,0 +1,202 @@
+Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
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+      "You" (or "Your") shall mean an individual or Legal Entity
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+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
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+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
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+
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+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
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+      on Your own behalf and on Your sole responsibility, not on behalf
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+   you may not use this file except in compliance with the License.
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+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
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+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+

vendor/github.com/cockroachdb/cockroach-go/Makefile

@@ -0,0 +1,55 @@
+# Copyright 2016 The Cockroach Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied. See the License for the specific language governing
+# permissions and limitations under the License. See the AUTHORS file
+# for names of contributors.
+#
+# Author: Spencer Kimball (spencer.kimball@gmail.com)
+#
+
+# Cockroach build rules.
+GO ?= go
+# Allow setting of go build flags from the command line.
+GOFLAGS :=
+
+.PHONY: all
+all: test check
+
+.PHONY: test
+test:
+	$(GO) test -v -i ./...
+	$(GO) test -v ./...
+
+.PHONY: deps
+deps:
+	$(GO) get -d -t ./...
+
+.PHONY: check
+check:
+	@echo "checking for \"path\" imports"
+	@! git grep -F '"path"' -- '*.go'
+	@echo "errcheck"
+	@errcheck ./...
+	@echo "vet"
+	@! go tool vet . 2>&1 | \
+	  grep -vE '^vet: cannot process directory .git'
+	@echo "vet --shadow"
+	@! go tool vet --shadow . 2>&1 | \
+	  grep -vE '(declaration of err shadows|^vet: cannot process directory \.git)'
+	@echo "golint"
+	@! golint ./... | grep -vE '(\.pb\.go)'
+	@echo "varcheck"
+	@varcheck -e ./...
+	@echo "gofmt (simplify)"
+	@! gofmt -s -d -l . 2>&1 | grep -vE '^\.git/'
+	@echo "goimports"
+	@! goimports -l . | grep -vF 'No Exceptions'

vendor/github.com/cockroachdb/cockroach-go/README.md

@@ -0,0 +1,2 @@
+# testing
+Testing helpers for cockroach clients.

vendor/github.com/cockroachdb/cockroach-go/circle.yml

@@ -0,0 +1,18 @@
+machine:
+  environment:
+    GOROOT: ${HOME}/go
+    PATH: ${PATH}:${HOME}/go/bin
+  post:
+    - sudo rm -rf /usr/local/go
+    - if [ ! -e go1.6.linux-amd64.tar.gz ]; then curl -O https://storage.googleapis.com/golang/go1.6.linux-amd64.tar.gz; fi
+    - tar -C ${HOME} -xzf go1.6.linux-amd64.tar.gz
+
+dependencies:
+  override:
+    - make deps
+  cache_directories:
+    - ~/go1.6.linux-amd64.tar.gz
+
+test:
+  override:
+    - make test

vendor/github.com/cockroachdb/cockroach-go/crdb/tx.go

@@ -0,0 +1,95 @@
+// Copyright 2016 The Cockroach Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// permissions and limitations under the License.
+//
+// Author: Andrei Matei (andrei@cockroachlabs.com)
+
+// Package crdb provides helpers for using CockroachDB in client
+// applications.
+package crdb
+
+import (
+	"database/sql"
+
+	"github.com/lib/pq"
+)
+
+// AmbiguousCommitError represents an error that left a transaction in an
+// ambiguous state: unclear if it committed or not.
+type AmbiguousCommitError struct {
+	error
+}
+
+// ExecuteTx runs fn inside a transaction and retries it as needed.
+// On non-retryable failures, the transaction is aborted and rolled
+// back; on success, the transaction is committed.
+// There are cases where the state of a transaction is inherently ambiguous: if
+// we err on RELEASE with a communication error it's unclear if the transaction
+// has been committed or not (similar to erroring on COMMIT in other databases).
+// In that case, we return AmbiguousCommitError.
+//
+// For more information about CockroachDB's transaction model see
+// https://cockroachlabs.com/docs/transactions.html.
+//
+// NOTE: the supplied exec closure should not have external side
+// effects beyond changes to the database.
+func ExecuteTx(db *sql.DB, fn func(*sql.Tx) error) (err error) {
+	// Start a transaction.
+	var tx *sql.Tx
+	tx, err = db.Begin()
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if err == nil {
+			// Ignore commit errors. The tx has already been committed by RELEASE.
+			_ = tx.Commit()
+		} else {
+			// We always need to execute a Rollback() so sql.DB releases the
+			// connection.
+			_ = tx.Rollback()
+		}
+	}()
+	// Specify that we intend to retry this txn in case of CockroachDB retryable
+	// errors.
+	if _, err = tx.Exec("SAVEPOINT cockroach_restart"); err != nil {
+		return err
+	}
+
+	for {
+		released := false
+		err = fn(tx)
+		if err == nil {
+			// RELEASE acts like COMMIT in CockroachDB. We use it since it gives us an
+			// opportunity to react to retryable errors, whereas tx.Commit() doesn't.
+			released = true
+			if _, err = tx.Exec("RELEASE SAVEPOINT cockroach_restart"); err == nil {
+				return nil
+			}
+		}
+		// We got an error; let's see if it's a retryable one and, if so, restart. We look
+		// for either the standard PG errcode SerializationFailureError:40001 or the Cockroach extension
+		// errcode RetriableError:CR000. The Cockroach extension has been removed server-side, but support
+		// for it has been left here for now to maintain backwards compatibility.
+		pqErr, ok := err.(*pq.Error)
+		if retryable := ok && (pqErr.Code == "CR000" || pqErr.Code == "40001"); !retryable {
+			if released {
+				err = &AmbiguousCommitError{err}
+			}
+			return err
+		}
+		if _, err = tx.Exec("ROLLBACK TO SAVEPOINT cockroach_restart"); err != nil {
+			return err
+		}
+	}
+}

vendor/github.com/cockroachdb/cockroach-go/crdb/tx_test.go

@@ -0,0 +1,125 @@
+// Copyright 2016 The Cockroach Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// permissions and limitations under the License.
+//
+// Author: Spencer Kimball (spencer@cockroachlabs.com)
+
+package crdb
+
+import (
+	"database/sql"
+	"fmt"
+	"sync"
+	"testing"
+
+	"github.com/cockroachdb/cockroach-go/testserver"
+)
+
+// TestExecuteTx verifies transaction retry using the classic
+// example of write skew in bank account balance transfers.
+func TestExecuteTx(t *testing.T) {
+	db, stop := testserver.NewDBForTest(t)
+	defer stop()
+
+	initStmt := `
+CREATE DATABASE d;
+CREATE TABLE d.t (acct INT PRIMARY KEY, balance INT);
+INSERT INTO d.t (acct, balance) VALUES (1, 100), (2, 100);
+`
+	if _, err := db.Exec(initStmt); err != nil {
+		t.Fatal(err)
+	}
+
+	type queryI interface {
+		Query(string, ...interface{}) (*sql.Rows, error)
+	}
+
+	getBalances := func(q queryI) (bal1, bal2 int, err error) {
+		var rows *sql.Rows
+		rows, err = q.Query(`SELECT balance FROM d.t WHERE acct IN (1, 2);`)
+		if err != nil {
+			return
+		}
+		defer rows.Close()
+		balances := []*int{&bal1, &bal2}
+		i := 0
+		for ; rows.Next(); i += 1 {
+			if err = rows.Scan(balances[i]); err != nil {
+				return
+			}
+		}
+		if i != 2 {
+			err = fmt.Errorf("expected two balances; got %d", i)
+			return
+		}
+		return
+	}
+
+	runTxn := func(wg *sync.WaitGroup, iter *int) <-chan error {
+		errCh := make(chan error, 1)
+		go func() {
+			*iter = 0
+			errCh <- ExecuteTx(db, func(tx *sql.Tx) error {
+				*iter++
+				bal1, bal2, err := getBalances(tx)
+				if err != nil {
+					return err
+				}
+				// If this is the first iteration, wait for the other tx to also read.
+				if *iter == 1 {
+					wg.Done()
+					wg.Wait()
+				}
+				// Now, subtract from one account and give to the other.
+				if bal1 > bal2 {
+					if _, err := tx.Exec(`
+UPDATE d.t SET balance=balance-100 WHERE acct=1;
+UPDATE d.t SET balance=balance+100 WHERE acct=2;
+`); err != nil {
+						return err
+					}
+				} else {
+					if _, err := tx.Exec(`
+UPDATE d.t SET balance=balance+100 WHERE acct=1;
+UPDATE d.t SET balance=balance-100 WHERE acct=2;
+`); err != nil {
+						return err
+					}
+				}
+				return nil
+			})
+		}()
+		return errCh
+	}
+
+	var wg sync.WaitGroup
+	wg.Add(2)
+	var iters1, iters2 int
+	txn1Err := runTxn(&wg, &iters1)
+	txn2Err := runTxn(&wg, &iters2)
+	if err := <-txn1Err; err != nil {
+		t.Errorf("expected success in txn1; got %s", err)
+	}
+	if err := <-txn2Err; err != nil {
+		t.Errorf("expected success in txn2; got %s", err)
+	}
+	if iters1+iters2 <= 2 {
+		t.Errorf("expected at least one retry between the competing transactions; "+
+			"got txn1=%d, txn2=%d", iters1, iters2)
+	}
+	bal1, bal2, err := getBalances(db)
+	if err != nil || bal1 != 100 || bal2 != 100 {
+		t.Errorf("expected balances to be restored without error; "+
+			"got acct1=%d, acct2=%d: %s", bal1, bal2, err)
+	}
+}

vendor/github.com/cockroachdb/cockroach-go/testserver/binaries.go

@@ -0,0 +1,119 @@
+package testserver
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+	"time"
+)
+
+const (
+	awsBaseURL       = "https://s3.amazonaws.com/cockroach/cockroach"
+	latestSuffix     = "LATEST"
+	localBinaryPath  = "/var/tmp"
+	finishedFileMode = 0555
+)
+
+func binaryName() string {
+	return fmt.Sprintf("cockroach.%s-%s", runtime.GOOS, runtime.GOARCH)
+}
+
+func binaryNameWithSha(sha string) string {
+	return fmt.Sprintf("%s.%s", binaryName(), sha)
+}
+
+func binaryPath(sha string) string {
+	return filepath.Join(localBinaryPath, binaryNameWithSha(sha))
+}
+
+func latestMarkerURL() string {
+	return fmt.Sprintf("%s/%s.%s", awsBaseURL, binaryName(), latestSuffix)
+}
+
+func binaryURL(sha string) string {
+	return fmt.Sprintf("%s/%s.%s", awsBaseURL, binaryName(), sha)
+}
+
+func findLatestSha() (string, error) {
+	markerURL := latestMarkerURL()
+	marker, err := http.Get(markerURL)
+	if err != nil {
+		return "", fmt.Errorf("could not download %s: %s", markerURL)
+	}
+	if marker.StatusCode == 404 {
+		return "", fmt.Errorf("for 404 from GET %s: make sure OS and ARCH are supported",
+			markerURL)
+	} else if marker.StatusCode != 200 {
+		return "", fmt.Errorf("bad response got GET %s: %d (%s)",
+			markerURL, marker.StatusCode, marker.Status)
+	}
+
+	defer marker.Body.Close()
+	body, err := ioutil.ReadAll(marker.Body)
+	if err != nil {
+		return "", err
+	}
+	return strings.TrimSpace(string(body)), nil
+}
+
+func downloadFile(url, filePath string) error {
+	output, err := os.OpenFile(filePath, os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0200)
+	if err != nil {
+		return fmt.Errorf("error creating %s: %s", filePath, "-", err)
+	}
+	defer output.Close()
+
+	log.Printf("downloading %s to %s, this may take some time", url, filePath)
+
+	response, err := http.Get(url)
+	if err != nil {
+		return fmt.Errorf("error downloading %s: %s", url, err)
+	}
+	defer response.Body.Close()
+	if response.StatusCode != 200 {
+		return fmt.Errorf("error downloading %s: %d (%s)", url, response.StatusCode, response.Status)
+	}
+
+	_, err = io.Copy(output, response.Body)
+	if err != nil {
+		return fmt.Errorf("problem downloading %s to %s: %s", url, filePath, err)
+	}
+
+	// Download was successful, add the rw bits.
+	return os.Chmod(filePath, finishedFileMode)
+}
+
+func downloadLatestBinary() (string, error) {
+	sha, err := findLatestSha()
+	if err != nil {
+		return "", err
+	}
+
+	localFile := binaryPath(sha)
+	for {
+		finfo, err := os.Stat(localFile)
+		if err != nil {
+			// File does not exist: download it.
+			break
+		}
+		// File already present: check mode.
+		if finfo.Mode().Perm() == finishedFileMode {
+			return localFile, nil
+		}
+		time.Sleep(time.Millisecond * 10)
+	}
+
+	err = downloadFile(binaryURL(sha), localFile)
+	if err != nil {
+		_ = os.Remove(localFile)
+		return "", err
+	}
+
+	return localFile, nil
+}

vendor/github.com/cockroachdb/cockroach-go/testserver/testserver.go

@@ -0,0 +1,415 @@
+// Copyright 2016 The Cockroach Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// permissions and limitations under the License.
+//
+// Author: Marc Berhault (marc@cockroachlabs.com)
+
+// Package testserver provides helpers to run a cockroach binary within tests.
+// It automatically downloads the latest cockroach binary for your platform
+// (Linux-amd64 and Darwin-amd64 only for now), or attempts to run "cockroach"
+// from your PATH.
+//
+// A normal invocation is (check err every time):
+// ts, err := testserver.NewTestServer()
+// err = ts.Start()
+// defer ts.Stop()
+// url := ts.PGURL()
+//
+// To use, run as follows:
+//   import "github.com/cockroachdb/cockroach-go/testserver"
+//   import "testing"
+//   import "time"
+//
+//   func TestRunServer(t *testing.T) {
+//      ts, err := testserver.NewTestServer()
+//      if err != nil {
+//        t.Fatal(err)
+//      }
+//      err := ts.Start()
+//      if err != nil {
+//        t.Fatal(err)
+//      }
+//      defer ts.Stop()
+//
+//      url := ts.PGURL()
+//      if url != nil {
+//        t.FatalF("url not found")
+//      }
+//      t.Logf("URL: %s", url.String())
+//
+//      db, err := sql.Open("postgres", url.String())
+//      if err != nil {
+//        t.Fatal(err)
+//      }
+//    }
+package testserver
+
+import (
+	"database/sql"
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/url"
+	"os"
+	"os/exec"
+	"os/user"
+	"path/filepath"
+	"regexp"
+	"strings"
+	"sync"
+	"syscall"
+	"testing"
+	"time"
+)
+
+var sqlURLRegexp = regexp.MustCompile("sql:\\s+(postgresql:.+)\n")
+
+const (
+	stateNew     = iota
+	stateRunning = iota
+	stateStopped = iota
+	stateFailed  = iota
+
+	socketPort     = 26257
+	socketFileBase = ".s.PGSQL"
+)
+
+// TestServer is a helper to run a real cockroach node.
+type TestServer struct {
+	mu        sync.RWMutex
+	state     int
+	baseDir   string
+	pgURL     *url.URL
+	cmd       *exec.Cmd
+	args      []string
+	stdout    string
+	stderr    string
+	stdoutBuf logWriter
+	stderrBuf logWriter
+}
+
+// NewDBForTest creates a new CockroachDB TestServer instance and
+// opens a SQL database connection to it. Returns a sql *DB instance a
+// shutdown function. The caller is responsible for executing the
+// returned shutdown function on exit.
+func NewDBForTest(t *testing.T) (*sql.DB, func()) {
+	return NewDBForTestWithDatabase(t, "")
+}
+
+// NewDBForTestWithDatabase creates a new CockroachDB TestServer
+// instance and opens a SQL database connection to it. If database is
+// specified, the returned connection will explicitly connect to
+// it. Returns a sql *DB instance a shutdown function. The caller is
+// responsible for executing the returned shutdown function on exit.
+func NewDBForTestWithDatabase(t *testing.T, database string) (*sql.DB, func()) {
+	ts, err := NewTestServer()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = ts.Start()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	url := ts.PGURL()
+	if url == nil {
+		t.Fatalf("url not found")
+	}
+	if len(database) > 0 {
+		url.Path = database
+	}
+
+	db, err := sql.Open("postgres", url.String())
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ts.WaitForInit(db)
+
+	return db, func() {
+		_ = db.Close()
+		ts.Stop()
+	}
+}
+
+// NewTestServer creates a new TestServer, but does not start it.
+// The cockroach binary for your OS and ARCH is downloaded automatically.
+// If the download fails, we attempt just call "cockroach", hoping it is
+// found in your path.
+func NewTestServer() (*TestServer, error) {
+	cockroachBinary, err := downloadLatestBinary()
+	if err == nil {
+		log.Printf("Using automatically-downloaded binary: %s", cockroachBinary)
+	} else {
+		log.Printf("Attempting to use cockroach binary from your PATH")
+		cockroachBinary = "cockroach"
+	}
+
+	// Force "/tmp/" so avoid OSX's really long temp directory names
+	// which get us over the socket filename length limit.
+	baseDir, err := ioutil.TempDir("/tmp", "cockroach-testserver")
+	if err != nil {
+		return nil, fmt.Errorf("could not create temp directory: %s", err)
+	}
+
+	logDir := filepath.Join(baseDir, "logs")
+	if err := os.MkdirAll(logDir, 0755); err != nil {
+		return nil, fmt.Errorf("could not create logs directory: %s: %s", logDir, err)
+	}
+
+	options := url.Values{
+		"host": []string{baseDir},
+	}
+	pgurl := &url.URL{
+		Scheme:   "postgres",
+		User:     url.User("root"),
+		Host:     fmt.Sprintf(":%d", socketPort),
+		RawQuery: options.Encode(),
+	}
+	socketPath := filepath.Join(baseDir, fmt.Sprintf("%s.%d", socketFileBase, socketPort))
+
+	args := []string{
+		cockroachBinary,
+		"start",
+		"--logtostderr",
+		"--insecure",
+		"--port=0",
+		"--http-port=0",
+		"--socket=" + socketPath,
+		"--store=" + baseDir,
+	}
+
+	ts := &TestServer{
+		baseDir: baseDir,
+		pgURL:   pgurl,
+		args:    args,
+		stdout:  filepath.Join(logDir, "cockroach.stdout"),
+		stderr:  filepath.Join(logDir, "cockroach.stderr"),
+	}
+	return ts, nil
+}
+
+// Stdout returns the entire contents of the process' stdout.
+func (ts *TestServer) Stdout() string {
+	return ts.stdoutBuf.String()
+}
+
+// Stderr returns the entire contents of the process' stderr.
+func (ts *TestServer) Stderr() string {
+	return ts.stderrBuf.String()
+}
+
+// PGURL returns the postgres connection URL to reach the started
+// cockroach node.
+// It loops until the expected unix socket file exists.
+// This does not timeout, relying instead on test timeouts.
+func (ts *TestServer) PGURL() *url.URL {
+	socketPath := filepath.Join(ts.baseDir, fmt.Sprintf("%s.%d", socketFileBase, socketPort))
+	for {
+		if _, err := os.Stat(socketPath); err == nil {
+			return ts.pgURL
+		}
+		time.Sleep(time.Millisecond * 10)
+	}
+	return nil
+}
+
+// WaitForInit repeatedly looks up the list of databases until
+// the "system" database exists. It ignores all errors as we are
+// waiting for the process to start and complete initialization.
+// This does not timeout, relying instead on test timeouts.
+func (ts *TestServer) WaitForInit(db *sql.DB) {
+	for {
+		// We issue a query that fails both on connection errors and on the
+		// system database not existing.
+		if _, err := db.Query("SHOW DATABASES"); err == nil {
+			return
+		}
+		time.Sleep(time.Millisecond * 10)
+	}
+}
+
+// Start runs the process, returning an error on any problems,
+// including being unable to start, but not unexpected failure.
+// It should only be called once in the lifetime of a TestServer object.
+func (ts *TestServer) Start() error {
+	ts.mu.Lock()
+	if ts.state != stateNew {
+		ts.mu.Unlock()
+		return errors.New("Start() can only be called once")
+	}
+	ts.state = stateRunning
+	ts.mu.Unlock()
+
+	ts.cmd = exec.Command(ts.args[0], ts.args[1:]...)
+	ts.cmd.Env = []string{"COCKROACH_MAX_OFFSET=1ns"}
+
+	if len(ts.stdout) > 0 {
+		wr, err := newFileLogWriter(ts.stdout)
+		if err != nil {
+			return fmt.Errorf("unable to open file %s: %s", ts.stdout, err)
+		}
+		ts.stdoutBuf = wr
+	}
+	ts.cmd.Stdout = ts.stdoutBuf
+
+	if len(ts.stderr) > 0 {
+		wr, err := newFileLogWriter(ts.stderr)
+		if err != nil {
+			return fmt.Errorf("unable to open file %s: %s", ts.stderr, err)
+		}
+		ts.stderrBuf = wr
+	}
+	ts.cmd.Stderr = ts.stderrBuf
+
+	for k, v := range defaultEnv() {
+		ts.cmd.Env = append(ts.cmd.Env, k+"="+v)
+	}
+
+	err := ts.cmd.Start()
+	if ts.cmd.Process != nil {
+		log.Printf("process %d started: %s", ts.cmd.Process.Pid, strings.Join(ts.args, " "))
+	}
+	if err != nil {
+		log.Printf(err.Error())
+		ts.stdoutBuf.Close()
+		ts.stderrBuf.Close()
+
+		ts.mu.Lock()
+		ts.state = stateFailed
+		ts.mu.Unlock()
+
+		return fmt.Errorf("failure starting process: %s", err)
+	}
+
+	go func() {
+		ts.cmd.Wait()
+
+		ts.stdoutBuf.Close()
+		ts.stderrBuf.Close()
+
+		ps := ts.cmd.ProcessState
+		sy := ps.Sys().(syscall.WaitStatus)
+
+		log.Printf("Process %d exited with status %d", ps.Pid(), sy.ExitStatus())
+		log.Printf(ps.String())
+
+		ts.mu.Lock()
+		if sy.ExitStatus() == 0 {
+			ts.state = stateStopped
+		} else {
+			ts.state = stateFailed
+		}
+		ts.mu.Unlock()
+	}()
+
+	return nil
+}
+
+// Stop kills the process if it is still running and cleans its directory.
+// It should only be called once in the lifetime of a TestServer object.
+// Logs fatal if the process has already failed.
+func (ts *TestServer) Stop() {
+	ts.mu.RLock()
+	defer ts.mu.RUnlock()
+
+	if ts.state == stateNew {
+		log.Fatal("Stop() called, but Start() was never called")
+	}
+	if ts.state == stateFailed {
+		log.Fatalf("Stop() called, but process exited unexpectedly. Stdout:\n%s\nStderr:\n%s\n",
+			ts.Stdout(), ts.Stderr())
+		return
+	}
+
+	if ts.state != stateStopped {
+		// Only call kill if not running. It could have exited properly.
+		ts.cmd.Process.Kill()
+	}
+
+	// Only cleanup on intentional stops.
+	_ = os.RemoveAll(ts.baseDir)
+}
+
+type logWriter interface {
+	Write(p []byte) (n int, err error)
+	String() string
+	Len() int64
+	Close()
+}
+
+type fileLogWriter struct {
+	filename string
+	file     *os.File
+}
+
+func newFileLogWriter(file string) (*fileLogWriter, error) {
+	f, err := os.Create(file)
+	if err != nil {
+		return nil, err
+	}
+
+	return &fileLogWriter{
+		filename: file,
+		file:     f,
+	}, nil
+}
+
+func (w fileLogWriter) Close() {
+	w.file.Close()
+}
+
+func (w fileLogWriter) Write(p []byte) (n int, err error) {
+	return w.file.Write(p)
+}
+
+func (w fileLogWriter) String() string {
+	b, err := ioutil.ReadFile(w.filename)
+	if err == nil {
+		return string(b)
+	}
+	return ""
+}
+
+func (w fileLogWriter) Len() int64 {
+	s, err := os.Stat(w.filename)
+	if err == nil {
+		return s.Size()
+	}
+	return 0
+}
+
+func defaultEnv() map[string]string {
+	vars := map[string]string{}
+	u, err := user.Current()
+	if err == nil {
+		if _, ok := vars["USER"]; !ok {
+			vars["USER"] = u.Username
+		}
+		if _, ok := vars["UID"]; !ok {
+			vars["UID"] = u.Uid
+		}
+		if _, ok := vars["GID"]; !ok {
+			vars["GID"] = u.Gid
+		}
+		if _, ok := vars["HOME"]; !ok {
+			vars["HOME"] = u.HomeDir
+		}
+	}
+	if _, ok := vars["PATH"]; !ok {
+		vars["PATH"] = os.Getenv("PATH")
+	}
+	return vars
+}

vendor/github.com/cockroachdb/cockroach-go/testserver/testserver_test.go

@@ -0,0 +1,35 @@
+// Copyright 2016 The Cockroach Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// permissions and limitations under the License.
+//
+// Author: Marc Berhault (marc@cockroachlabs.com)
+
+package testserver_test
+
+import (
+	"testing"
+
+	// Needed for postgres driver test.
+	"github.com/cockroachdb/cockroach-go/testserver"
+	_ "github.com/lib/pq"
+)
+
+func TestRunServer(t *testing.T) {
+	db, stop := testserver.NewDBForTest(t)
+	defer stop()
+
+	_, err := db.Exec("SELECT 1")
+	if err != nil {
+		t.Fatal(err)
+	}
+}