Bump github.com/gogo/protobuf to v1.3.2

Fixes https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3121
2026-01-26 05:14:13 +01:00 · 2021-03-02 14:47:00 +01:00
parent 726091712d
commit d368cbed32
16 changed files with 573 additions and 280 deletions
--- a/go.mod
+++ b/go.mod
@@ -4,6 +4,7 @@ go 1.15

 require (
 	github.com/client9/misspell v0.3.4
+	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/spf13/cobra v0.0.5
 	github.com/spf13/pflag v1.0.5
 	k8s.io/api v0.20.0
--- a/go.sum
+++ b/go.sum
@@ -130,6 +130,8 @@ github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7a
 github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zVXpSg4=
 github.com/gogo/protobuf v1.3.1 h1:DqDEcV5aeaTmdFBePNpYsp3FlcVH/2ISVVM9Qf8PSls=
 github.com/gogo/protobuf v1.3.1/go.mod h1:SlYgWuQ5SjCEi6WLHjHCa1yvBfUnHcTbrrZtXPKa29o=
+github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
+github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20160516000752-02826c3e7903 h1:LbsanbbD6LieFkXbj9YNNBupiGHJgFeLpO0j0Fza1h8=
@@ -217,6 +219,7 @@ github.com/jstemmer/go-junit-report v0.9.1/go.mod h1:Brl9GWCQeLvo8nXZwPNNblvFj/X
 github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
 github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
 github.com/kisielk/errcheck v1.2.0/go.mod h1:/BMXB+zMLi60iA8Vv6Ksmxu/1UDYcXs4uQLJ+jE2L00=
+github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
@@ -318,6 +321,7 @@ github.com/urfave/cli v1.20.0/go.mod h1:70zkFmudgCuE/ngEzBv17Jvp/497gISqfk5gWijb
 github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2/go.mod h1:UETIi67q53MR2AWcXfiuqkDkRtnGDLqkBTpCHuJHxtU=
 github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77/go.mod h1:aYKd//L2LvnjZzWKhF00oedf4jCCReLcmhLdhm1A27Q=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
+github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 go.etcd.io/bbolt v1.3.3/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.etcd.io/bbolt v1.3.5/go.mod h1:G5EMThwa9y8QZGBClrRx5EY+Yw9kAhnjy3bSjsnlVTQ=
 go.etcd.io/etcd v0.5.0-alpha.5.0.20200910180754-dd1b699fc489/go.mod h1:yVHk9ub3CSBatqGNg7GRmsnfLWtoW60w4eDYfh7vHDg=
@@ -399,6 +403,7 @@ golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20200301022130-244492dfa37a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e h1:3G+cUijn7XD+S4eJFddp53Pv7+slrESplyjG25HgL+k=
 golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20201110031124-69a78807bb2b h1:uwuIcX0g4Yl1NC5XAz37xsr2lTtcqevgzYNVt49waME=
 golang.org/x/net v0.0.0-20201110031124-69a78807bb2b/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
@@ -415,6 +420,7 @@ golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -502,6 +508,9 @@ golang.org/x/tools v0.0.0-20200304193943-95d2e580d8eb/go.mod h1:o4KQGtdN14AW+yjs
 golang.org/x/tools v0.0.0-20200505023115-26f46d2f7ef8/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20200616133436-c1934b75d054 h1:HHeAlu5H9b71C+Fx0K+1dGgVFN1DM1/wz4aoGOA5qS8=
 golang.org/x/tools v0.0.0-20200616133436-c1934b75d054/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
+golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
+golang.org/x/tools v0.0.0-20210106214847-113979e3529a h1:CB3a9Nez8M13wwlr/E2YtwoU+qYHKfC+JrDa45RXXoQ=
+golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
--- a/vendor/github.com/gogo/protobuf/proto/text_parser.go
+++ b/vendor/github.com/gogo/protobuf/proto/text_parser.go
@@ -318,7 +318,7 @@ func unescape(s string) (ch string, tail string, err error) {
 		if i > utf8.MaxRune {
 			return "", "", fmt.Errorf(`\%c%s is not a valid Unicode code point`, r, ss)
 		}
-		return string(i), s, nil
+		return string(rune(i)), s, nil
 	}
 	return "", "", fmt.Errorf(`unknown escape \%c`, r)
 }
--- a/vendor/golang.org/x/tools/go/ast/astutil/util.go
+++ b/vendor/golang.org/x/tools/go/ast/astutil/util.go
@@ -1,3 +1,7 @@
+// Copyright 2015 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 astutil

 import "go/ast"
--- a/vendor/golang.org/x/tools/imports/forward.go
+++ b/vendor/golang.org/x/tools/imports/forward.go
@@ -1,12 +1,16 @@
+// Copyright 2019 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 imports implements a Go pretty-printer (like package "go/format")
 // that also adds or removes import statements as necessary.
 package imports // import "golang.org/x/tools/imports"

 import (
-	"go/build"
+	"io/ioutil"
 	"log"
-	"os"

+	"golang.org/x/tools/internal/gocommand"
 	intimp "golang.org/x/tools/internal/imports"
 )

@@ -31,31 +35,34 @@ var Debug = false
 var LocalPrefix string

 // Process formats and adjusts imports for the provided file.
-// If opt is nil the defaults are used.
+// If opt is nil the defaults are used, and if src is nil the source
+// is read from the filesystem.
 //
 // Note that filename's directory influences which imports can be chosen,
 // so it is important that filename be accurate.
 // To process data ``as if'' it were in filename, pass the data as a non-nil src.
 func Process(filename string, src []byte, opt *Options) ([]byte, error) {
+	var err error
+	if src == nil {
+		src, err = ioutil.ReadFile(filename)
+		if err != nil {
+			return nil, err
+		}
+	}
 	if opt == nil {
 		opt = &Options{Comments: true, TabIndent: true, TabWidth: 8}
 	}
 	intopt := &intimp.Options{
 		Env: &intimp.ProcessEnv{
-			GOPATH:      build.Default.GOPATH,
-			GOROOT:      build.Default.GOROOT,
-			GOFLAGS:     os.Getenv("GOFLAGS"),
-			GO111MODULE: os.Getenv("GO111MODULE"),
-			GOPROXY:     os.Getenv("GOPROXY"),
-			GOSUMDB:     os.Getenv("GOSUMDB"),
-			LocalPrefix: LocalPrefix,
+			GocmdRunner: &gocommand.Runner{},
 		},
-		AllErrors:  opt.AllErrors,
-		Comments:   opt.Comments,
-		FormatOnly: opt.FormatOnly,
-		Fragment:   opt.Fragment,
-		TabIndent:  opt.TabIndent,
-		TabWidth:   opt.TabWidth,
+		LocalPrefix: LocalPrefix,
+		AllErrors:   opt.AllErrors,
+		Comments:    opt.Comments,
+		FormatOnly:  opt.FormatOnly,
+		Fragment:    opt.Fragment,
+		TabIndent:   opt.TabIndent,
+		TabWidth:    opt.TabWidth,
 	}
 	if Debug {
 		intopt.Env.Logf = log.Printf
--- a/vendor/golang.org/x/tools/internal/event/core/event.go
+++ b/vendor/golang.org/x/tools/internal/event/core/event.go
@@ -12,7 +12,7 @@ import (
 	"golang.org/x/tools/internal/event/label"
 )

-// Event holds the information about an event of note that ocurred.
+// Event holds the information about an event of note that occurred.
 type Event struct {
 	at time.Time

--- a/vendor/golang.org/x/tools/internal/gocommand/invoke.go
+++ b/vendor/golang.org/x/tools/internal/gocommand/invoke.go
@@ -13,6 +13,7 @@ import (
 	"os"
 	"os/exec"
 	"regexp"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -23,11 +24,24 @@ import (
 // An Runner will run go command invocations and serialize
 // them if it sees a concurrency error.
 type Runner struct {
-	// LoadMu guards packages.Load calls and associated state.
-	loadMu sync.Mutex
-	// locked is true when we hold the mutex and have incremented.
-	locked         bool
-	serializeLoads int
+	// once guards the runner initialization.
+	once sync.Once
+
+	// inFlight tracks available workers.
+	inFlight chan struct{}
+
+	// serialized guards the ability to run a go command serially,
+	// to avoid deadlocks when claiming workers.
+	serialized chan struct{}
+}
+
+const maxInFlight = 10
+
+func (runner *Runner) initialize() {
+	runner.once.Do(func() {
+		runner.inFlight = make(chan struct{}, maxInFlight)
+		runner.serialized = make(chan struct{}, 1)
+	})
 }

 // 1.13: go: updates to go.mod needed, but contents have changed
@@ -37,7 +51,7 @@ var modConcurrencyError = regexp.MustCompile(`go:.*go.mod.*contents have changed
 // Run is a convenience wrapper around RunRaw.
 // It returns only stdout and a "friendly" error.
 func (runner *Runner) Run(ctx context.Context, inv Invocation) (*bytes.Buffer, error) {
-	stdout, _, friendly, _ := runner.runRaw(ctx, inv)
+	stdout, _, friendly, _ := runner.RunRaw(ctx, inv)
 	return stdout, friendly
 }

@@ -51,64 +65,78 @@ func (runner *Runner) RunPiped(ctx context.Context, inv Invocation, stdout, stde
 // RunRaw runs the invocation, serializing requests only if they fight over
 // go.mod changes.
 func (runner *Runner) RunRaw(ctx context.Context, inv Invocation) (*bytes.Buffer, *bytes.Buffer, error, error) {
-	return runner.runRaw(ctx, inv)
+	// Make sure the runner is always initialized.
+	runner.initialize()
+
+	// First, try to run the go command concurrently.
+	stdout, stderr, friendlyErr, err := runner.runConcurrent(ctx, inv)
+
+	// If we encounter a load concurrency error, we need to retry serially.
+	if friendlyErr == nil || !modConcurrencyError.MatchString(friendlyErr.Error()) {
+		return stdout, stderr, friendlyErr, err
+	}
+	event.Error(ctx, "Load concurrency error, will retry serially", err)
+
+	// Run serially by calling runPiped.
+	stdout.Reset()
+	stderr.Reset()
+	friendlyErr, err = runner.runPiped(ctx, inv, stdout, stderr)
+	return stdout, stderr, friendlyErr, err
+}
+
+func (runner *Runner) runConcurrent(ctx context.Context, inv Invocation) (*bytes.Buffer, *bytes.Buffer, error, error) {
+	// Wait for 1 worker to become available.
+	select {
+	case <-ctx.Done():
+		return nil, nil, nil, ctx.Err()
+	case runner.inFlight <- struct{}{}:
+		defer func() { <-runner.inFlight }()
+	}
+
+	stdout, stderr := &bytes.Buffer{}, &bytes.Buffer{}
+	friendlyErr, err := inv.runWithFriendlyError(ctx, stdout, stderr)
+	return stdout, stderr, friendlyErr, err
 }

 func (runner *Runner) runPiped(ctx context.Context, inv Invocation, stdout, stderr io.Writer) (error, error) {
-	runner.loadMu.Lock()
-	runner.serializeLoads++
-	runner.locked = true
+	// Make sure the runner is always initialized.
+	runner.initialize()

-	defer func() {
-		runner.locked = false
-		runner.serializeLoads--
-		runner.loadMu.Unlock()
-	}()
+	// Acquire the serialization lock. This avoids deadlocks between two
+	// runPiped commands.
+	select {
+	case <-ctx.Done():
+		return nil, ctx.Err()
+	case runner.serialized <- struct{}{}:
+		defer func() { <-runner.serialized }()
+	}
+
+	// Wait for all in-progress go commands to return before proceeding,
+	// to avoid load concurrency errors.
+	for i := 0; i < maxInFlight; i++ {
+		select {
+		case <-ctx.Done():
+			return nil, ctx.Err()
+		case runner.inFlight <- struct{}{}:
+			// Make sure we always "return" any workers we took.
+			defer func() { <-runner.inFlight }()
+		}
+	}

 	return inv.runWithFriendlyError(ctx, stdout, stderr)
 }

-func (runner *Runner) runRaw(ctx context.Context, inv Invocation) (*bytes.Buffer, *bytes.Buffer, error, error) {
-	// We want to run invocations concurrently as much as possible. However,
-	// if go.mod updates are needed, only one can make them and the others will
-	// fail. We need to retry in those cases, but we don't want to thrash so
-	// badly we never recover. To avoid that, once we've seen one concurrency
-	// error, start serializing everything until the backlog has cleared out.
-	runner.loadMu.Lock()
-	if runner.serializeLoads == 0 {
-		runner.loadMu.Unlock()
-	} else {
-		runner.locked = true
-		runner.serializeLoads++
-	}
-	defer func() {
-		if runner.locked {
-			runner.locked = false
-			runner.serializeLoads--
-			runner.loadMu.Unlock()
-		}
-	}()
-
-	for {
-		stdout, stderr := &bytes.Buffer{}, &bytes.Buffer{}
-		friendlyErr, err := inv.runWithFriendlyError(ctx, stdout, stderr)
-		if friendlyErr == nil || !modConcurrencyError.MatchString(friendlyErr.Error()) {
-			return stdout, stderr, friendlyErr, err
-		}
-		event.Error(ctx, "Load concurrency error, will retry serially", err)
-		if !runner.locked {
-			runner.loadMu.Lock()
-			runner.serializeLoads++
-			runner.locked = true
-		}
-	}
-}
-
 // An Invocation represents a call to the go command.
 type Invocation struct {
 	Verb       string
 	Args       []string
 	BuildFlags []string
+	ModFlag    string
+	ModFile    string
+	Overlay    string
+	// If CleanEnv is set, the invocation will run only with the environment
+	// in Env, not starting with os.Environ.
+	CleanEnv   bool
 	Env        []string
 	WorkingDir string
 	Logf       func(format string, args ...interface{})
@@ -137,17 +165,41 @@ func (i *Invocation) run(ctx context.Context, stdout, stderr io.Writer) error {
 	}

 	goArgs := []string{i.Verb}
+
+	appendModFile := func() {
+		if i.ModFile != "" {
+			goArgs = append(goArgs, "-modfile="+i.ModFile)
+		}
+	}
+	appendModFlag := func() {
+		if i.ModFlag != "" {
+			goArgs = append(goArgs, "-mod="+i.ModFlag)
+		}
+	}
+	appendOverlayFlag := func() {
+		if i.Overlay != "" {
+			goArgs = append(goArgs, "-overlay="+i.Overlay)
+		}
+	}
+
 	switch i.Verb {
-	case "mod":
-		// mod needs the sub-verb before build flags.
-		goArgs = append(goArgs, i.Args[0])
-		goArgs = append(goArgs, i.BuildFlags...)
-		goArgs = append(goArgs, i.Args[1:]...)
-	case "env":
-		// env doesn't take build flags.
+	case "env", "version":
 		goArgs = append(goArgs, i.Args...)
-	default:
+	case "mod":
+		// mod needs the sub-verb before flags.
+		goArgs = append(goArgs, i.Args[0])
+		appendModFile()
+		goArgs = append(goArgs, i.Args[1:]...)
+	case "get":
 		goArgs = append(goArgs, i.BuildFlags...)
+		appendModFile()
+		goArgs = append(goArgs, i.Args...)
+
+	default: // notably list and build.
+		goArgs = append(goArgs, i.BuildFlags...)
+		appendModFile()
+		appendModFlag()
+		appendOverlayFlag()
 		goArgs = append(goArgs, i.Args...)
 	}
 	cmd := exec.Command("go", goArgs...)
@@ -159,12 +211,14 @@ func (i *Invocation) run(ctx context.Context, stdout, stderr io.Writer) error {
 	// The Go stdlib has a special feature where if the cwd and the PWD are the
 	// same node then it trusts the PWD, so by setting it in the env for the child
 	// process we fix up all the paths returned by the go command.
-	cmd.Env = append(os.Environ(), i.Env...)
+	if !i.CleanEnv {
+		cmd.Env = os.Environ()
+	}
+	cmd.Env = append(cmd.Env, i.Env...)
 	if i.WorkingDir != "" {
 		cmd.Env = append(cmd.Env, "PWD="+i.WorkingDir)
 		cmd.Dir = i.WorkingDir
 	}
-
 	defer func(start time.Time) { log("%s for %v", time.Since(start), cmdDebugStr(cmd)) }(time.Now())

 	return runCmdContext(ctx, cmd)
@@ -201,10 +255,19 @@ func runCmdContext(ctx context.Context, cmd *exec.Cmd) error {
 func cmdDebugStr(cmd *exec.Cmd) string {
 	env := make(map[string]string)
 	for _, kv := range cmd.Env {
-		split := strings.Split(kv, "=")
+		split := strings.SplitN(kv, "=", 2)
 		k, v := split[0], split[1]
 		env[k] = v
 	}

-	return fmt.Sprintf("GOROOT=%v GOPATH=%v GO111MODULE=%v GOPROXY=%v PWD=%v go %v", env["GOROOT"], env["GOPATH"], env["GO111MODULE"], env["GOPROXY"], env["PWD"], cmd.Args)
+	var args []string
+	for _, arg := range cmd.Args {
+		quoted := strconv.Quote(arg)
+		if quoted[1:len(quoted)-1] != arg || strings.Contains(arg, " ") {
+			args = append(args, quoted)
+		} else {
+			args = append(args, arg)
+		}
+	}
+	return fmt.Sprintf("GOROOT=%v GOPATH=%v GO111MODULE=%v GOPROXY=%v PWD=%v %v", env["GOROOT"], env["GOPATH"], env["GO111MODULE"], env["GOPROXY"], env["PWD"], strings.Join(args, " "))
 }
--- a/vendor/golang.org/x/tools/internal/gocommand/version.go
+++ b/vendor/golang.org/x/tools/internal/gocommand/version.go
@@ -0,0 +1,51 @@
+// Copyright 2020 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 gocommand
+
+import (
+	"context"
+	"fmt"
+	"strings"
+)
+
+// GoVersion checks the go version by running "go list" with modules off.
+// It returns the X in Go 1.X.
+func GoVersion(ctx context.Context, inv Invocation, r *Runner) (int, error) {
+	inv.Verb = "list"
+	inv.Args = []string{"-e", "-f", `{{context.ReleaseTags}}`}
+	inv.Env = append(append([]string{}, inv.Env...), "GO111MODULE=off")
+	// Unset any unneeded flags, and remove them from BuildFlags, if they're
+	// present.
+	inv.ModFile = ""
+	inv.ModFlag = ""
+	var buildFlags []string
+	for _, flag := range inv.BuildFlags {
+		// Flags can be prefixed by one or two dashes.
+		f := strings.TrimPrefix(strings.TrimPrefix(flag, "-"), "-")
+		if strings.HasPrefix(f, "mod=") || strings.HasPrefix(f, "modfile=") {
+			continue
+		}
+		buildFlags = append(buildFlags, flag)
+	}
+	inv.BuildFlags = buildFlags
+	stdoutBytes, err := r.Run(ctx, inv)
+	if err != nil {
+		return 0, err
+	}
+	stdout := stdoutBytes.String()
+	if len(stdout) < 3 {
+		return 0, fmt.Errorf("bad ReleaseTags output: %q", stdout)
+	}
+	// Split up "[go1.1 go1.15]"
+	tags := strings.Fields(stdout[1 : len(stdout)-2])
+	for i := len(tags) - 1; i >= 0; i-- {
+		var version int
+		if _, err := fmt.Sscanf(tags[i], "go1.%d", &version); err != nil {
+			continue
+		}
+		return version, nil
+	}
+	return 0, fmt.Errorf("no parseable ReleaseTags in %v", tags)
+}
--- a/vendor/golang.org/x/tools/internal/gopathwalk/walk.go
+++ b/vendor/golang.org/x/tools/internal/gopathwalk/walk.go
@@ -10,7 +10,6 @@ import (
 	"bufio"
 	"bytes"
 	"fmt"
-	"go/build"
 	"io/ioutil"
 	"log"
 	"os"
@@ -47,16 +46,6 @@ type Root struct {
 	Type RootType
 }

-// SrcDirsRoots returns the roots from build.Default.SrcDirs(). Not modules-compatible.
-func SrcDirsRoots(ctx *build.Context) []Root {
-	var roots []Root
-	roots = append(roots, Root{filepath.Join(ctx.GOROOT, "src"), RootGOROOT})
-	for _, p := range filepath.SplitList(ctx.GOPATH) {
-		roots = append(roots, Root{filepath.Join(p, "src"), RootGOPATH})
-	}
-	return roots
-}
-
 // Walk walks Go source directories ($GOROOT, $GOPATH, etc) to find packages.
 // For each package found, add will be called (concurrently) with the absolute
 // paths of the containing source directory and the package directory.
--- a/vendor/golang.org/x/tools/internal/imports/fix.go
+++ b/vendor/golang.org/x/tools/internal/imports/fix.go
@@ -7,6 +7,7 @@ package imports
 import (
 	"bytes"
 	"context"
+	"encoding/json"
 	"fmt"
 	"go/ast"
 	"go/build"
@@ -31,25 +32,25 @@ import (

 // importToGroup is a list of functions which map from an import path to
 // a group number.
-var importToGroup = []func(env *ProcessEnv, importPath string) (num int, ok bool){
-	func(env *ProcessEnv, importPath string) (num int, ok bool) {
-		if env.LocalPrefix == "" {
+var importToGroup = []func(localPrefix, importPath string) (num int, ok bool){
+	func(localPrefix, importPath string) (num int, ok bool) {
+		if localPrefix == "" {
 			return
 		}
-		for _, p := range strings.Split(env.LocalPrefix, ",") {
+		for _, p := range strings.Split(localPrefix, ",") {
 			if strings.HasPrefix(importPath, p) || strings.TrimSuffix(p, "/") == importPath {
 				return 3, true
 			}
 		}
 		return
 	},
-	func(_ *ProcessEnv, importPath string) (num int, ok bool) {
+	func(_, importPath string) (num int, ok bool) {
 		if strings.HasPrefix(importPath, "appengine") {
 			return 2, true
 		}
 		return
 	},
-	func(_ *ProcessEnv, importPath string) (num int, ok bool) {
+	func(_, importPath string) (num int, ok bool) {
 		firstComponent := strings.Split(importPath, "/")[0]
 		if strings.Contains(firstComponent, ".") {
 			return 1, true
@@ -58,9 +59,9 @@ var importToGroup = []func(env *ProcessEnv, importPath string) (num int, ok bool
 	},
 }

-func importGroup(env *ProcessEnv, importPath string) int {
+func importGroup(localPrefix, importPath string) int {
 	for _, fn := range importToGroup {
-		if n, ok := fn(env, importPath); ok {
+		if n, ok := fn(localPrefix, importPath); ok {
 			return n
 		}
 	}
@@ -82,7 +83,7 @@ type ImportFix struct {
 	IdentName string
 	// FixType is the type of fix this is (AddImport, DeleteImport, SetImportName).
 	FixType   ImportFixType
-	Relevance int // see pkg
+	Relevance float64 // see pkg
 }

 // An ImportInfo represents a single import statement.
@@ -277,7 +278,12 @@ func (p *pass) loadPackageNames(imports []*ImportInfo) error {
 		unknown = append(unknown, imp.ImportPath)
 	}

-	names, err := p.env.GetResolver().loadPackageNames(unknown, p.srcDir)
+	resolver, err := p.env.GetResolver()
+	if err != nil {
+		return err
+	}
+
+	names, err := resolver.loadPackageNames(unknown, p.srcDir)
 	if err != nil {
 		return err
 	}
@@ -567,7 +573,9 @@ func getFixes(fset *token.FileSet, f *ast.File, filename string, env *ProcessEnv
 		return fixes, nil
 	}

-	addStdlibCandidates(p, p.missingRefs)
+	if err := addStdlibCandidates(p, p.missingRefs); err != nil {
+		return nil, err
+	}
 	p.assumeSiblingImportsValid()
 	if fixes, done := p.fix(); done {
 		return fixes, nil
@@ -584,9 +592,9 @@ func getFixes(fset *token.FileSet, f *ast.File, filename string, env *ProcessEnv
 	return fixes, nil
 }

-// Highest relevance, used for the standard library. Chosen arbitrarily to
-// match pre-existing gopls code.
-const MaxRelevance = 7
+// MaxRelevance is the highest relevance, used for the standard library.
+// Chosen arbitrarily to match pre-existing gopls code.
+const MaxRelevance = 7.0

 // getCandidatePkgs works with the passed callback to find all acceptable packages.
 // It deduplicates by import path, and uses a cached stdlib rather than reading
@@ -595,22 +603,28 @@ func getCandidatePkgs(ctx context.Context, wrappedCallback *scanCallback, filena
 	notSelf := func(p *pkg) bool {
 		return p.packageName != filePkg || p.dir != filepath.Dir(filename)
 	}
+	goenv, err := env.goEnv()
+	if err != nil {
+		return err
+	}
+
+	var mu sync.Mutex // to guard asynchronous access to dupCheck
+	dupCheck := map[string]struct{}{}
+
 	// Start off with the standard library.
 	for importPath, exports := range stdlib {
 		p := &pkg{
-			dir:             filepath.Join(env.GOROOT, "src", importPath),
+			dir:             filepath.Join(goenv["GOROOT"], "src", importPath),
 			importPathShort: importPath,
 			packageName:     path.Base(importPath),
 			relevance:       MaxRelevance,
 		}
-		if notSelf(p) && wrappedCallback.packageNameLoaded(p) {
+		dupCheck[importPath] = struct{}{}
+		if notSelf(p) && wrappedCallback.dirFound(p) && wrappedCallback.packageNameLoaded(p) {
 			wrappedCallback.exportsLoaded(p, exports)
 		}
 	}

-	var mu sync.Mutex
-	dupCheck := map[string]struct{}{}
-
 	scanFilter := &scanCallback{
 		rootFound: func(root gopathwalk.Root) bool {
 			// Exclude goroot results -- getting them is relatively expensive, not cached,
@@ -639,15 +653,23 @@ func getCandidatePkgs(ctx context.Context, wrappedCallback *scanCallback, filena
 			wrappedCallback.exportsLoaded(pkg, exports)
 		},
 	}
-	return env.GetResolver().scan(ctx, scanFilter)
+	resolver, err := env.GetResolver()
+	if err != nil {
+		return err
+	}
+	return resolver.scan(ctx, scanFilter)
 }

-func ScoreImportPaths(ctx context.Context, env *ProcessEnv, paths []string) map[string]int {
-	result := make(map[string]int)
-	for _, path := range paths {
-		result[path] = env.GetResolver().scoreImportPath(ctx, path)
+func ScoreImportPaths(ctx context.Context, env *ProcessEnv, paths []string) (map[string]float64, error) {
+	result := make(map[string]float64)
+	resolver, err := env.GetResolver()
+	if err != nil {
+		return nil, err
 	}
-	return result
+	for _, path := range paths {
+		result[path] = resolver.scoreImportPath(ctx, path)
+	}
+	return result, nil
 }

 func PrimeCache(ctx context.Context, env *ProcessEnv) error {
@@ -673,8 +695,9 @@ func candidateImportName(pkg *pkg) string {
 	return ""
 }

-// getAllCandidates gets all of the candidates to be imported, regardless of if they are needed.
-func getAllCandidates(ctx context.Context, wrapped func(ImportFix), searchPrefix, filename, filePkg string, env *ProcessEnv) error {
+// GetAllCandidates calls wrapped for each package whose name starts with
+// searchPrefix, and can be imported from filename with the package name filePkg.
+func GetAllCandidates(ctx context.Context, wrapped func(ImportFix), searchPrefix, filename, filePkg string, env *ProcessEnv) error {
 	callback := &scanCallback{
 		rootFound: func(gopathwalk.Root) bool {
 			return true
@@ -707,13 +730,43 @@ func getAllCandidates(ctx context.Context, wrapped func(ImportFix), searchPrefix
 	return getCandidatePkgs(ctx, callback, filename, filePkg, env)
 }

+// GetImportPaths calls wrapped for each package whose import path starts with
+// searchPrefix, and can be imported from filename with the package name filePkg.
+func GetImportPaths(ctx context.Context, wrapped func(ImportFix), searchPrefix, filename, filePkg string, env *ProcessEnv) error {
+	callback := &scanCallback{
+		rootFound: func(gopathwalk.Root) bool {
+			return true
+		},
+		dirFound: func(pkg *pkg) bool {
+			if !canUse(filename, pkg.dir) {
+				return false
+			}
+			return strings.HasPrefix(pkg.importPathShort, searchPrefix)
+		},
+		packageNameLoaded: func(pkg *pkg) bool {
+			wrapped(ImportFix{
+				StmtInfo: ImportInfo{
+					ImportPath: pkg.importPathShort,
+					Name:       candidateImportName(pkg),
+				},
+				IdentName: pkg.packageName,
+				FixType:   AddImport,
+				Relevance: pkg.relevance,
+			})
+			return false
+		},
+	}
+	return getCandidatePkgs(ctx, callback, filename, filePkg, env)
+}
+
 // A PackageExport is a package and its exports.
 type PackageExport struct {
 	Fix     *ImportFix
 	Exports []string
 }

-func getPackageExports(ctx context.Context, wrapped func(PackageExport), searchPkg, filename, filePkg string, env *ProcessEnv) error {
+// GetPackageExports returns all known packages with name pkg and their exports.
+func GetPackageExports(ctx context.Context, wrapped func(PackageExport), searchPkg, filename, filePkg string, env *ProcessEnv) error {
 	callback := &scanCallback{
 		rootFound: func(gopathwalk.Root) bool {
 			return true
@@ -743,85 +796,154 @@ func getPackageExports(ctx context.Context, wrapped func(PackageExport), searchP
 	return getCandidatePkgs(ctx, callback, filename, filePkg, env)
 }

+var RequiredGoEnvVars = []string{"GO111MODULE", "GOFLAGS", "GOINSECURE", "GOMOD", "GOMODCACHE", "GONOPROXY", "GONOSUMDB", "GOPATH", "GOPROXY", "GOROOT", "GOSUMDB"}
+
 // ProcessEnv contains environment variables and settings that affect the use of
 // the go command, the go/build package, etc.
 type ProcessEnv struct {
-	LocalPrefix string
-
 	GocmdRunner *gocommand.Runner

 	BuildFlags []string
+	ModFlag    string
+	ModFile    string

-	// If non-empty, these will be used instead of the
-	// process-wide values.
-	GOPATH, GOROOT, GO111MODULE, GOPROXY, GOFLAGS, GOSUMDB string
-	WorkingDir                                             string
+	// Env overrides the OS environment, and can be used to specify
+	// GOPROXY, GO111MODULE, etc. PATH cannot be set here, because
+	// exec.Command will not honor it.
+	// Specifying all of RequiredGoEnvVars avoids a call to `go env`.
+	Env map[string]string
+
+	WorkingDir string

 	// If Logf is non-nil, debug logging is enabled through this function.
 	Logf func(format string, args ...interface{})

+	initialized bool
+
 	resolver Resolver
 }

+func (e *ProcessEnv) goEnv() (map[string]string, error) {
+	if err := e.init(); err != nil {
+		return nil, err
+	}
+	return e.Env, nil
+}
+
+func (e *ProcessEnv) matchFile(dir, name string) (bool, error) {
+	bctx, err := e.buildContext()
+	if err != nil {
+		return false, err
+	}
+	return bctx.MatchFile(dir, name)
+}
+
 // CopyConfig copies the env's configuration into a new env.
 func (e *ProcessEnv) CopyConfig() *ProcessEnv {
-	copy := *e
-	copy.resolver = nil
-	return &copy
+	copy := &ProcessEnv{
+		GocmdRunner: e.GocmdRunner,
+		initialized: e.initialized,
+		BuildFlags:  e.BuildFlags,
+		Logf:        e.Logf,
+		WorkingDir:  e.WorkingDir,
+		resolver:    nil,
+		Env:         map[string]string{},
+	}
+	for k, v := range e.Env {
+		copy.Env[k] = v
+	}
+	return copy
+}
+
+func (e *ProcessEnv) init() error {
+	if e.initialized {
+		return nil
+	}
+
+	foundAllRequired := true
+	for _, k := range RequiredGoEnvVars {
+		if _, ok := e.Env[k]; !ok {
+			foundAllRequired = false
+			break
+		}
+	}
+	if foundAllRequired {
+		e.initialized = true
+		return nil
+	}
+
+	if e.Env == nil {
+		e.Env = map[string]string{}
+	}
+
+	goEnv := map[string]string{}
+	stdout, err := e.invokeGo(context.TODO(), "env", append([]string{"-json"}, RequiredGoEnvVars...)...)
+	if err != nil {
+		return err
+	}
+	if err := json.Unmarshal(stdout.Bytes(), &goEnv); err != nil {
+		return err
+	}
+	for k, v := range goEnv {
+		e.Env[k] = v
+	}
+	e.initialized = true
+	return nil
 }

 func (e *ProcessEnv) env() []string {
-	env := os.Environ()
-	add := func(k, v string) {
-		if v != "" {
-			env = append(env, k+"="+v)
-		}
-	}
-	add("GOPATH", e.GOPATH)
-	add("GOROOT", e.GOROOT)
-	add("GO111MODULE", e.GO111MODULE)
-	add("GOPROXY", e.GOPROXY)
-	add("GOFLAGS", e.GOFLAGS)
-	add("GOSUMDB", e.GOSUMDB)
-	if e.WorkingDir != "" {
-		add("PWD", e.WorkingDir)
+	var env []string // the gocommand package will prepend os.Environ.
+	for k, v := range e.Env {
+		env = append(env, k+"="+v)
 	}
 	return env
 }

-func (e *ProcessEnv) GetResolver() Resolver {
+func (e *ProcessEnv) GetResolver() (Resolver, error) {
 	if e.resolver != nil {
-		return e.resolver
+		return e.resolver, nil
 	}
-	out, err := e.invokeGo(context.TODO(), "env", "GOMOD")
-	if err != nil || len(bytes.TrimSpace(out.Bytes())) == 0 {
+	if err := e.init(); err != nil {
+		return nil, err
+	}
+	if len(e.Env["GOMOD"]) == 0 {
 		e.resolver = newGopathResolver(e)
-		return e.resolver
+		return e.resolver, nil
 	}
 	e.resolver = newModuleResolver(e)
-	return e.resolver
+	return e.resolver, nil
 }

-func (e *ProcessEnv) buildContext() *build.Context {
+func (e *ProcessEnv) buildContext() (*build.Context, error) {
 	ctx := build.Default
-	ctx.GOROOT = e.GOROOT
-	ctx.GOPATH = e.GOPATH
+	goenv, err := e.goEnv()
+	if err != nil {
+		return nil, err
+	}
+	ctx.GOROOT = goenv["GOROOT"]
+	ctx.GOPATH = goenv["GOPATH"]

 	// As of Go 1.14, build.Context has a Dir field
 	// (see golang.org/issue/34860).
 	// Populate it only if present.
 	rc := reflect.ValueOf(&ctx).Elem()
 	dir := rc.FieldByName("Dir")
-	if !dir.IsValid() {
-		// Working drafts of Go 1.14 named the field "WorkingDir" instead.
-		// TODO(bcmills): Remove this case after the Go 1.14 beta has been released.
-		dir = rc.FieldByName("WorkingDir")
-	}
 	if dir.IsValid() && dir.Kind() == reflect.String {
 		dir.SetString(e.WorkingDir)
 	}

-	return &ctx
+	// Since Go 1.11, go/build.Context.Import may invoke 'go list' depending on
+	// the value in GO111MODULE in the process's environment. We always want to
+	// run in GOPATH mode when calling Import, so we need to prevent this from
+	// happening. In Go 1.16, GO111MODULE defaults to "on", so this problem comes
+	// up more frequently.
+	//
+	// HACK: setting any of the Context I/O hooks prevents Import from invoking
+	// 'go list', regardless of GO111MODULE. This is undocumented, but it's
+	// unlikely to change before GOPATH support is removed.
+	ctx.ReadDir = ioutil.ReadDir
+
+	return &ctx, nil
 }

 func (e *ProcessEnv) invokeGo(ctx context.Context, verb string, args ...string) (*bytes.Buffer, error) {
@@ -836,10 +958,14 @@ func (e *ProcessEnv) invokeGo(ctx context.Context, verb string, args ...string)
 	return e.GocmdRunner.Run(ctx, inv)
 }

-func addStdlibCandidates(pass *pass, refs references) {
+func addStdlibCandidates(pass *pass, refs references) error {
+	goenv, err := pass.env.goEnv()
+	if err != nil {
+		return err
+	}
 	add := func(pkg string) {
 		// Prevent self-imports.
-		if path.Base(pkg) == pass.f.Name.Name && filepath.Join(pass.env.GOROOT, "src", pkg) == pass.srcDir {
+		if path.Base(pkg) == pass.f.Name.Name && filepath.Join(goenv["GOROOT"], "src", pkg) == pass.srcDir {
 			return
 		}
 		exports := copyExports(stdlib[pkg])
@@ -860,6 +986,7 @@ func addStdlibCandidates(pass *pass, refs references) {
 			}
 		}
 	}
+	return nil
 }

 // A Resolver does the build-system-specific parts of goimports.
@@ -872,7 +999,7 @@ type Resolver interface {
 	// loadExports may be called concurrently.
 	loadExports(ctx context.Context, pkg *pkg, includeTest bool) (string, []string, error)
 	// scoreImportPath returns the relevance for an import path.
-	scoreImportPath(ctx context.Context, path string) int
+	scoreImportPath(ctx context.Context, path string) float64

 	ClearForNewScan()
 }
@@ -924,10 +1051,13 @@ func addExternalCandidates(pass *pass, refs references, filename string) error {
 			return false // We'll do our own loading after we sort.
 		},
 	}
-	err := pass.env.GetResolver().scan(context.Background(), callback)
+	resolver, err := pass.env.GetResolver()
 	if err != nil {
 		return err
 	}
+	if err = resolver.scan(context.Background(), callback); err != nil {
+		return err
+	}

 	// Search for imports matching potential package references.
 	type result struct {
@@ -1053,21 +1183,24 @@ func (r *gopathResolver) ClearForNewScan() {

 func (r *gopathResolver) loadPackageNames(importPaths []string, srcDir string) (map[string]string, error) {
 	names := map[string]string{}
+	bctx, err := r.env.buildContext()
+	if err != nil {
+		return nil, err
+	}
 	for _, path := range importPaths {
-		names[path] = importPathToName(r.env, path, srcDir)
+		names[path] = importPathToName(bctx, path, srcDir)
 	}
 	return names, nil
 }

 // importPathToName finds out the actual package name, as declared in its .go files.
-// If there's a problem, it returns "".
-func importPathToName(env *ProcessEnv, importPath, srcDir string) (packageName string) {
+func importPathToName(bctx *build.Context, importPath, srcDir string) string {
 	// Fast path for standard library without going to disk.
 	if _, ok := stdlib[importPath]; ok {
 		return path.Base(importPath) // stdlib packages always match their paths.
 	}

-	buildPkg, err := env.buildContext().Import(importPath, srcDir, build.FindOnly)
+	buildPkg, err := bctx.Import(importPath, srcDir, build.FindOnly)
 	if err != nil {
 		return ""
 	}
@@ -1131,10 +1264,10 @@ func packageDirToName(dir string) (packageName string, err error) {
 }

 type pkg struct {
-	dir             string // absolute file path to pkg directory ("/usr/lib/go/src/net/http")
-	importPathShort string // vendorless import path ("net/http", "a/b")
-	packageName     string // package name loaded from source if requested
-	relevance       int    // a weakly-defined score of how relevant a package is. 0 is most relevant.
+	dir             string  // absolute file path to pkg directory ("/usr/lib/go/src/net/http")
+	importPathShort string  // vendorless import path ("net/http", "a/b")
+	packageName     string  // package name loaded from source if requested
+	relevance       float64 // a weakly-defined score of how relevant a package is. 0 is most relevant.
 }

 type pkgDistance struct {
@@ -1228,8 +1361,18 @@ func (r *gopathResolver) scan(ctx context.Context, callback *scanCallback) error
 	}
 	stop := r.cache.ScanAndListen(ctx, processDir)
 	defer stop()
+
+	goenv, err := r.env.goEnv()
+	if err != nil {
+		return err
+	}
+	var roots []gopathwalk.Root
+	roots = append(roots, gopathwalk.Root{filepath.Join(goenv["GOROOT"], "src"), gopathwalk.RootGOROOT})
+	for _, p := range filepath.SplitList(goenv["GOPATH"]) {
+		roots = append(roots, gopathwalk.Root{filepath.Join(p, "src"), gopathwalk.RootGOPATH})
+	}
 	// The callback is not necessarily safe to use in the goroutine below. Process roots eagerly.
-	roots := filterRoots(gopathwalk.SrcDirsRoots(r.env.buildContext()), callback.rootFound)
+	roots = filterRoots(roots, callback.rootFound)
 	// We can't cancel walks, because we need them to finish to have a usable
 	// cache. Instead, run them in a separate goroutine and detach.
 	scanDone := make(chan struct{})
@@ -1250,7 +1393,7 @@ func (r *gopathResolver) scan(ctx context.Context, callback *scanCallback) error
 	return nil
 }

-func (r *gopathResolver) scoreImportPath(ctx context.Context, path string) int {
+func (r *gopathResolver) scoreImportPath(ctx context.Context, path string) float64 {
 	if _, ok := stdlib[path]; ok {
 		return MaxRelevance
 	}
@@ -1289,8 +1432,6 @@ func VendorlessPath(ipath string) string {
 }

 func loadExportsFromFiles(ctx context.Context, env *ProcessEnv, dir string, includeTest bool) (string, []string, error) {
-	var exports []string
-
 	// Look for non-test, buildable .go files which could provide exports.
 	all, err := ioutil.ReadDir(dir)
 	if err != nil {
@@ -1302,7 +1443,7 @@ func loadExportsFromFiles(ctx context.Context, env *ProcessEnv, dir string, incl
 		if !strings.HasSuffix(name, ".go") || (!includeTest && strings.HasSuffix(name, "_test.go")) {
 			continue
 		}
-		match, err := env.buildContext().MatchFile(dir, fi.Name())
+		match, err := env.matchFile(dir, fi.Name())
 		if err != nil || !match {
 			continue
 		}
@@ -1314,6 +1455,7 @@ func loadExportsFromFiles(ctx context.Context, env *ProcessEnv, dir string, incl
 	}

 	var pkgName string
+	var exports []string
 	fset := token.NewFileSet()
 	for _, fi := range files {
 		select {
@@ -1368,6 +1510,10 @@ func findImport(ctx context.Context, pass *pass, candidates []pkgDistance, pkgNa
 			pass.env.Logf("%s candidate %d/%d: %v in %v", pkgName, i+1, len(candidates), c.pkg.importPathShort, c.pkg.dir)
 		}
 	}
+	resolver, err := pass.env.GetResolver()
+	if err != nil {
+		return nil, err
+	}

 	// Collect exports for packages with matching names.
 	rescv := make([]chan *pkg, len(candidates))
@@ -1406,7 +1552,7 @@ func findImport(ctx context.Context, pass *pass, candidates []pkgDistance, pkgNa
 				}
 				// If we're an x_test, load the package under test's test variant.
 				includeTest := strings.HasSuffix(pass.f.Name.Name, "_test") && c.pkg.dir == pass.srcDir
-				_, exports, err := pass.env.GetResolver().loadExports(ctx, c.pkg, includeTest)
+				_, exports, err := resolver.loadExports(ctx, c.pkg, includeTest)
 				if err != nil {
 					if pass.env.Logf != nil {
 						pass.env.Logf("loading exports in dir %s (seeking package %s): %v", c.pkg.dir, pkgName, err)
--- a/vendor/golang.org/x/tools/internal/imports/imports.go
+++ b/vendor/golang.org/x/tools/internal/imports/imports.go
@@ -11,29 +11,29 @@ package imports
 import (
 	"bufio"
 	"bytes"
-	"context"
 	"fmt"
 	"go/ast"
-	"go/build"
 	"go/format"
 	"go/parser"
 	"go/printer"
 	"go/token"
 	"io"
-	"io/ioutil"
-	"os"
 	"regexp"
 	"strconv"
 	"strings"

 	"golang.org/x/tools/go/ast/astutil"
-	"golang.org/x/tools/internal/gocommand"
 )

 // Options is golang.org/x/tools/imports.Options with extra internal-only options.
 type Options struct {
 	Env *ProcessEnv // The environment to use. Note: this contains the cached module and filesystem state.

+	// LocalPrefix is a comma-separated string of import path prefixes, which, if
+	// set, instructs Process to sort the import paths with the given prefixes
+	// into another group after 3rd-party packages.
+	LocalPrefix string
+
 	Fragment  bool // Accept fragment of a source file (no package statement)
 	AllErrors bool // Report all errors (not just the first 10 on different lines)

@@ -44,13 +44,8 @@ type Options struct {
 	FormatOnly bool // Disable the insertion and deletion of imports
 }

-// Process implements golang.org/x/tools/imports.Process with explicit context in env.
+// Process implements golang.org/x/tools/imports.Process with explicit context in opt.Env.
 func Process(filename string, src []byte, opt *Options) (formatted []byte, err error) {
-	src, opt, err = initialize(filename, src, opt)
-	if err != nil {
-		return nil, err
-	}
-
 	fileSet := token.NewFileSet()
 	file, adjust, err := parse(fileSet, filename, src, opt)
 	if err != nil {
@@ -66,16 +61,12 @@ func Process(filename string, src []byte, opt *Options) (formatted []byte, err e
 }

 // FixImports returns a list of fixes to the imports that, when applied,
-// will leave the imports in the same state as Process.
+// will leave the imports in the same state as Process. src and opt must
+// be specified.
 //
 // Note that filename's directory influences which imports can be chosen,
 // so it is important that filename be accurate.
 func FixImports(filename string, src []byte, opt *Options) (fixes []*ImportFix, err error) {
-	src, opt, err = initialize(filename, src, opt)
-	if err != nil {
-		return nil, err
-	}
-
 	fileSet := token.NewFileSet()
 	file, _, err := parse(fileSet, filename, src, opt)
 	if err != nil {
@@ -86,13 +77,9 @@ func FixImports(filename string, src []byte, opt *Options) (fixes []*ImportFix,
 }

 // ApplyFixes applies all of the fixes to the file and formats it. extraMode
-// is added in when parsing the file.
+// is added in when parsing the file. src and opts must be specified, but no
+// env is needed.
 func ApplyFixes(fixes []*ImportFix, filename string, src []byte, opt *Options, extraMode parser.Mode) (formatted []byte, err error) {
-	src, opt, err = initialize(filename, src, opt)
-	if err != nil {
-		return nil, err
-	}
-
 	// Don't use parse() -- we don't care about fragments or statement lists
 	// here, and we need to work with unparseable files.
 	fileSet := token.NewFileSet()
@@ -116,63 +103,9 @@ func ApplyFixes(fixes []*ImportFix, filename string, src []byte, opt *Options, e
 	return formatFile(fileSet, file, src, nil, opt)
 }

-// GetAllCandidates gets all of the packages starting with prefix that can be
-// imported by filename, sorted by import path.
-func GetAllCandidates(ctx context.Context, callback func(ImportFix), searchPrefix, filename, filePkg string, opt *Options) error {
-	_, opt, err := initialize(filename, []byte{}, opt)
-	if err != nil {
-		return err
-	}
-	return getAllCandidates(ctx, callback, searchPrefix, filename, filePkg, opt.Env)
-}
-
-// GetPackageExports returns all known packages with name pkg and their exports.
-func GetPackageExports(ctx context.Context, callback func(PackageExport), searchPkg, filename, filePkg string, opt *Options) error {
-	_, opt, err := initialize(filename, []byte{}, opt)
-	if err != nil {
-		return err
-	}
-	return getPackageExports(ctx, callback, searchPkg, filename, filePkg, opt.Env)
-}
-
-// initialize sets the values for opt and src.
-// If they are provided, they are not changed. Otherwise opt is set to the
-// default values and src is read from the file system.
-func initialize(filename string, src []byte, opt *Options) ([]byte, *Options, error) {
-	// Use defaults if opt is nil.
-	if opt == nil {
-		opt = &Options{Comments: true, TabIndent: true, TabWidth: 8}
-	}
-
-	// Set the env if the user has not provided it.
-	if opt.Env == nil {
-		opt.Env = &ProcessEnv{
-			GOPATH:      build.Default.GOPATH,
-			GOROOT:      build.Default.GOROOT,
-			GOFLAGS:     os.Getenv("GOFLAGS"),
-			GO111MODULE: os.Getenv("GO111MODULE"),
-			GOPROXY:     os.Getenv("GOPROXY"),
-			GOSUMDB:     os.Getenv("GOSUMDB"),
-		}
-	}
-	// Set the gocmdRunner if the user has not provided it.
-	if opt.Env.GocmdRunner == nil {
-		opt.Env.GocmdRunner = &gocommand.Runner{}
-	}
-	if src == nil {
-		b, err := ioutil.ReadFile(filename)
-		if err != nil {
-			return nil, nil, err
-		}
-		src = b
-	}
-
-	return src, opt, nil
-}
-
 func formatFile(fileSet *token.FileSet, file *ast.File, src []byte, adjust func(orig []byte, src []byte) []byte, opt *Options) ([]byte, error) {
-	mergeImports(opt.Env, fileSet, file)
-	sortImports(opt.Env, fileSet, file)
+	mergeImports(fileSet, file)
+	sortImports(opt.LocalPrefix, fileSet, file)
 	imps := astutil.Imports(fileSet, file)
 	var spacesBefore []string // import paths we need spaces before
 	for _, impSection := range imps {
@@ -183,7 +116,7 @@ func formatFile(fileSet *token.FileSet, file *ast.File, src []byte, adjust func(
 		lastGroup := -1
 		for _, importSpec := range impSection {
 			importPath, _ := strconv.Unquote(importSpec.Path.Value)
-			groupNum := importGroup(opt.Env, importPath)
+			groupNum := importGroup(opt.LocalPrefix, importPath)
 			if groupNum != lastGroup && lastGroup != -1 {
 				spacesBefore = append(spacesBefore, importPath)
 			}
--- a/vendor/golang.org/x/tools/internal/imports/mod.go
+++ b/vendor/golang.org/x/tools/internal/imports/mod.go
@@ -1,3 +1,7 @@
+// Copyright 2019 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 imports

 import (
@@ -53,8 +57,14 @@ func (r *ModuleResolver) init() error {
 		return nil
 	}

+	goenv, err := r.env.goEnv()
+	if err != nil {
+		return err
+	}
 	inv := gocommand.Invocation{
 		BuildFlags: r.env.BuildFlags,
+		ModFlag:    r.env.ModFlag,
+		ModFile:    r.env.ModFile,
 		Env:        r.env.env(),
 		Logf:       r.env.Logf,
 		WorkingDir: r.env.WorkingDir,
@@ -79,7 +89,15 @@ func (r *ModuleResolver) init() error {
 		r.initAllMods()
 	}

-	r.moduleCacheDir = filepath.Join(filepath.SplitList(r.env.GOPATH)[0], "/pkg/mod")
+	if gmc := r.env.Env["GOMODCACHE"]; gmc != "" {
+		r.moduleCacheDir = gmc
+	} else {
+		gopaths := filepath.SplitList(goenv["GOPATH"])
+		if len(gopaths) == 0 {
+			return fmt.Errorf("empty GOPATH")
+		}
+		r.moduleCacheDir = filepath.Join(gopaths[0], "/pkg/mod")
+	}

 	sort.Slice(r.modsByModPath, func(i, j int) bool {
 		count := func(x int) int {
@@ -95,7 +113,7 @@ func (r *ModuleResolver) init() error {
 	})

 	r.roots = []gopathwalk.Root{
-		{filepath.Join(r.env.GOROOT, "/src"), gopathwalk.RootGOROOT},
+		{filepath.Join(goenv["GOROOT"], "/src"), gopathwalk.RootGOROOT},
 	}
 	if r.main != nil {
 		r.roots = append(r.roots, gopathwalk.Root{r.main.Dir, gopathwalk.RootCurrentModule})
@@ -236,7 +254,7 @@ func (r *ModuleResolver) findPackage(importPath string) (*gocommand.ModuleJSON,
 		// files in that directory. If not, it could be provided by an
 		// outer module. See #29736.
 		for _, fi := range pkgFiles {
-			if ok, _ := r.env.buildContext().MatchFile(pkgDir, fi.Name()); ok {
+			if ok, _ := r.env.matchFile(pkgDir, fi.Name()); ok {
 				return m, pkgDir
 			}
 		}
@@ -337,10 +355,11 @@ func (r *ModuleResolver) modInfo(dir string) (modDir string, modName string) {
 	}

 	if r.dirInModuleCache(dir) {
-		matches := modCacheRegexp.FindStringSubmatch(dir)
-		index := strings.Index(dir, matches[1]+"@"+matches[2])
-		modDir := filepath.Join(dir[:index], matches[1]+"@"+matches[2])
-		return modDir, readModName(filepath.Join(modDir, "go.mod"))
+		if matches := modCacheRegexp.FindStringSubmatch(dir); len(matches) == 3 {
+			index := strings.Index(dir, matches[1]+"@"+matches[2])
+			modDir := filepath.Join(dir[:index], matches[1]+"@"+matches[2])
+			return modDir, readModName(filepath.Join(modDir, "go.mod"))
+		}
 	}
 	for {
 		if info, ok := r.cacheLoad(dir); ok {
@@ -479,7 +498,7 @@ func (r *ModuleResolver) scan(ctx context.Context, callback *scanCallback) error
 	return nil
 }

-func (r *ModuleResolver) scoreImportPath(ctx context.Context, path string) int {
+func (r *ModuleResolver) scoreImportPath(ctx context.Context, path string) float64 {
 	if _, ok := stdlib[path]; ok {
 		return MaxRelevance
 	}
@@ -487,17 +506,31 @@ func (r *ModuleResolver) scoreImportPath(ctx context.Context, path string) int {
 	return modRelevance(mod)
 }

-func modRelevance(mod *gocommand.ModuleJSON) int {
+func modRelevance(mod *gocommand.ModuleJSON) float64 {
+	var relevance float64
 	switch {
 	case mod == nil: // out of scope
 		return MaxRelevance - 4
 	case mod.Indirect:
-		return MaxRelevance - 3
+		relevance = MaxRelevance - 3
 	case !mod.Main:
-		return MaxRelevance - 2
+		relevance = MaxRelevance - 2
 	default:
-		return MaxRelevance - 1 // main module ties with stdlib
+		relevance = MaxRelevance - 1 // main module ties with stdlib
 	}
+
+	_, versionString, ok := module.SplitPathVersion(mod.Path)
+	if ok {
+		index := strings.Index(versionString, "v")
+		if index == -1 {
+			return relevance
+		}
+		if versionNumber, err := strconv.ParseFloat(versionString[index+1:], 64); err == nil {
+			relevance += versionNumber / 1000
+		}
+	}
+
+	return relevance
 }

 // canonicalize gets the result of canonicalizing the packages using the results
--- a/vendor/golang.org/x/tools/internal/imports/mod_cache.go
+++ b/vendor/golang.org/x/tools/internal/imports/mod_cache.go
@@ -1,3 +1,7 @@
+// Copyright 2019 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 imports

 import (
--- a/vendor/golang.org/x/tools/internal/imports/sortimports.go
+++ b/vendor/golang.org/x/tools/internal/imports/sortimports.go
@@ -15,7 +15,7 @@ import (

 // sortImports sorts runs of consecutive import lines in import blocks in f.
 // It also removes duplicate imports when it is possible to do so without data loss.
-func sortImports(env *ProcessEnv, fset *token.FileSet, f *ast.File) {
+func sortImports(localPrefix string, fset *token.FileSet, f *ast.File) {
 	for i, d := range f.Decls {
 		d, ok := d.(*ast.GenDecl)
 		if !ok || d.Tok != token.IMPORT {
@@ -40,11 +40,11 @@ func sortImports(env *ProcessEnv, fset *token.FileSet, f *ast.File) {
 		for j, s := range d.Specs {
 			if j > i && fset.Position(s.Pos()).Line > 1+fset.Position(d.Specs[j-1].End()).Line {
 				// j begins a new run.  End this one.
-				specs = append(specs, sortSpecs(env, fset, f, d.Specs[i:j])...)
+				specs = append(specs, sortSpecs(localPrefix, fset, f, d.Specs[i:j])...)
 				i = j
 			}
 		}
-		specs = append(specs, sortSpecs(env, fset, f, d.Specs[i:])...)
+		specs = append(specs, sortSpecs(localPrefix, fset, f, d.Specs[i:])...)
 		d.Specs = specs

 		// Deduping can leave a blank line before the rparen; clean that up.
@@ -60,7 +60,7 @@ func sortImports(env *ProcessEnv, fset *token.FileSet, f *ast.File) {

 // mergeImports merges all the import declarations into the first one.
 // Taken from golang.org/x/tools/ast/astutil.
-func mergeImports(env *ProcessEnv, fset *token.FileSet, f *ast.File) {
+func mergeImports(fset *token.FileSet, f *ast.File) {
 	if len(f.Decls) <= 1 {
 		return
 	}
@@ -142,7 +142,7 @@ type posSpan struct {
 	End   token.Pos
 }

-func sortSpecs(env *ProcessEnv, fset *token.FileSet, f *ast.File, specs []ast.Spec) []ast.Spec {
+func sortSpecs(localPrefix string, fset *token.FileSet, f *ast.File, specs []ast.Spec) []ast.Spec {
 	// Can't short-circuit here even if specs are already sorted,
 	// since they might yet need deduplication.
 	// A lone import, however, may be safely ignored.
@@ -191,7 +191,7 @@ func sortSpecs(env *ProcessEnv, fset *token.FileSet, f *ast.File, specs []ast.Sp
 	// Reassign the import paths to have the same position sequence.
 	// Reassign each comment to abut the end of its spec.
 	// Sort the comments by new position.
-	sort.Sort(byImportSpec{env, specs})
+	sort.Sort(byImportSpec{localPrefix, specs})

 	// Dedup. Thanks to our sorting, we can just consider
 	// adjacent pairs of imports.
@@ -245,8 +245,8 @@ func sortSpecs(env *ProcessEnv, fset *token.FileSet, f *ast.File, specs []ast.Sp
 }

 type byImportSpec struct {
-	env   *ProcessEnv
-	specs []ast.Spec // slice of *ast.ImportSpec
+	localPrefix string
+	specs       []ast.Spec // slice of *ast.ImportSpec
 }

 func (x byImportSpec) Len() int      { return len(x.specs) }
@@ -255,8 +255,8 @@ func (x byImportSpec) Less(i, j int) bool {
 	ipath := importPath(x.specs[i])
 	jpath := importPath(x.specs[j])

-	igroup := importGroup(x.env, ipath)
-	jgroup := importGroup(x.env, jpath)
+	igroup := importGroup(x.localPrefix, ipath)
+	jgroup := importGroup(x.localPrefix, jpath)
 	if igroup != jgroup {
 		return igroup < jgroup
 	}
--- a/vendor/golang.org/x/tools/internal/imports/zstdlib.go
+++ b/vendor/golang.org/x/tools/internal/imports/zstdlib.go
@@ -56,6 +56,7 @@ var stdlib = map[string][]string{
 	},
 	"bufio": []string{
 		"ErrAdvanceTooFar",
+		"ErrBadReadCount",
 		"ErrBufferFull",
 		"ErrFinalToken",
 		"ErrInvalidUnreadByte",
@@ -303,7 +304,9 @@ var stdlib = map[string][]string{
 		"PrivateKey",
 		"PublicKey",
 		"Sign",
+		"SignASN1",
 		"Verify",
+		"VerifyASN1",
 	},
 	"crypto/ed25519": []string{
 		"GenerateKey",
@@ -322,11 +325,13 @@ var stdlib = map[string][]string{
 		"CurveParams",
 		"GenerateKey",
 		"Marshal",
+		"MarshalCompressed",
 		"P224",
 		"P256",
 		"P384",
 		"P521",
 		"Unmarshal",
+		"UnmarshalCompressed",
 	},
 	"crypto/hmac": []string{
 		"Equal",
@@ -432,6 +437,7 @@ var stdlib = map[string][]string{
 		"CurveP521",
 		"Dial",
 		"DialWithDialer",
+		"Dialer",
 		"ECDSAWithP256AndSHA256",
 		"ECDSAWithP384AndSHA384",
 		"ECDSAWithP521AndSHA512",
@@ -507,6 +513,7 @@ var stdlib = map[string][]string{
 		"ConstraintViolationError",
 		"CreateCertificate",
 		"CreateCertificateRequest",
+		"CreateRevocationList",
 		"DSA",
 		"DSAWithSHA1",
 		"DSAWithSHA256",
@@ -581,6 +588,7 @@ var stdlib = map[string][]string{
 		"PublicKeyAlgorithm",
 		"PureEd25519",
 		"RSA",
+		"RevocationList",
 		"SHA1WithRSA",
 		"SHA256WithRSA",
 		"SHA256WithRSAPSS",
@@ -694,6 +702,7 @@ var stdlib = map[string][]string{
 		"String",
 		"Tx",
 		"TxOptions",
+		"Validator",
 		"Value",
 		"ValueConverter",
 		"Valuer",
@@ -2349,6 +2358,27 @@ var stdlib = map[string][]string{
 		"IMAGE_DIRECTORY_ENTRY_RESOURCE",
 		"IMAGE_DIRECTORY_ENTRY_SECURITY",
 		"IMAGE_DIRECTORY_ENTRY_TLS",
+		"IMAGE_DLLCHARACTERISTICS_APPCONTAINER",
+		"IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE",
+		"IMAGE_DLLCHARACTERISTICS_FORCE_INTEGRITY",
+		"IMAGE_DLLCHARACTERISTICS_GUARD_CF",
+		"IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA",
+		"IMAGE_DLLCHARACTERISTICS_NO_BIND",
+		"IMAGE_DLLCHARACTERISTICS_NO_ISOLATION",
+		"IMAGE_DLLCHARACTERISTICS_NO_SEH",
+		"IMAGE_DLLCHARACTERISTICS_NX_COMPAT",
+		"IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE",
+		"IMAGE_DLLCHARACTERISTICS_WDM_DRIVER",
+		"IMAGE_FILE_32BIT_MACHINE",
+		"IMAGE_FILE_AGGRESIVE_WS_TRIM",
+		"IMAGE_FILE_BYTES_REVERSED_HI",
+		"IMAGE_FILE_BYTES_REVERSED_LO",
+		"IMAGE_FILE_DEBUG_STRIPPED",
+		"IMAGE_FILE_DLL",
+		"IMAGE_FILE_EXECUTABLE_IMAGE",
+		"IMAGE_FILE_LARGE_ADDRESS_AWARE",
+		"IMAGE_FILE_LINE_NUMS_STRIPPED",
+		"IMAGE_FILE_LOCAL_SYMS_STRIPPED",
 		"IMAGE_FILE_MACHINE_AM33",
 		"IMAGE_FILE_MACHINE_AMD64",
 		"IMAGE_FILE_MACHINE_ARM",
@@ -2371,6 +2401,25 @@ var stdlib = map[string][]string{
 		"IMAGE_FILE_MACHINE_THUMB",
 		"IMAGE_FILE_MACHINE_UNKNOWN",
 		"IMAGE_FILE_MACHINE_WCEMIPSV2",
+		"IMAGE_FILE_NET_RUN_FROM_SWAP",
+		"IMAGE_FILE_RELOCS_STRIPPED",
+		"IMAGE_FILE_REMOVABLE_RUN_FROM_SWAP",
+		"IMAGE_FILE_SYSTEM",
+		"IMAGE_FILE_UP_SYSTEM_ONLY",
+		"IMAGE_SUBSYSTEM_EFI_APPLICATION",
+		"IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER",
+		"IMAGE_SUBSYSTEM_EFI_ROM",
+		"IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER",
+		"IMAGE_SUBSYSTEM_NATIVE",
+		"IMAGE_SUBSYSTEM_NATIVE_WINDOWS",
+		"IMAGE_SUBSYSTEM_OS2_CUI",
+		"IMAGE_SUBSYSTEM_POSIX_CUI",
+		"IMAGE_SUBSYSTEM_UNKNOWN",
+		"IMAGE_SUBSYSTEM_WINDOWS_BOOT_APPLICATION",
+		"IMAGE_SUBSYSTEM_WINDOWS_CE_GUI",
+		"IMAGE_SUBSYSTEM_WINDOWS_CUI",
+		"IMAGE_SUBSYSTEM_WINDOWS_GUI",
+		"IMAGE_SUBSYSTEM_XBOX",
 		"ImportDirectory",
 		"NewFile",
 		"Open",
@@ -4188,6 +4237,7 @@ var stdlib = map[string][]string{
 		"DevNull",
 		"Environ",
 		"ErrClosed",
+		"ErrDeadlineExceeded",
 		"ErrExist",
 		"ErrInvalid",
 		"ErrNoDeadline",
@@ -4646,6 +4696,7 @@ var stdlib = map[string][]string{
 		"ErrRange",
 		"ErrSyntax",
 		"FormatBool",
+		"FormatComplex",
 		"FormatFloat",
 		"FormatInt",
 		"FormatUint",
@@ -4655,6 +4706,7 @@ var stdlib = map[string][]string{
 		"Itoa",
 		"NumError",
 		"ParseBool",
+		"ParseComplex",
 		"ParseFloat",
 		"ParseInt",
 		"ParseUint",
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -40,7 +40,8 @@ github.com/go-openapi/jsonreference
 github.com/go-openapi/spec
 # github.com/go-openapi/swag v0.19.5
 github.com/go-openapi/swag
-# github.com/gogo/protobuf v1.3.1
+# github.com/gogo/protobuf v1.3.2
+## explicit
 github.com/gogo/protobuf/proto
 github.com/gogo/protobuf/sortkeys
 # github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e
@@ -131,7 +132,7 @@ golang.org/x/text/unicode/norm
 golang.org/x/text/width
 # golang.org/x/time v0.0.0-20200630173020-3af7569d3a1e
 golang.org/x/time/rate
-# golang.org/x/tools v0.0.0-20200616133436-c1934b75d054
+# golang.org/x/tools v0.0.0-20210106214847-113979e3529a
 golang.org/x/tools/go/ast/astutil
 golang.org/x/tools/imports
 golang.org/x/tools/internal/event