1 files changed, 0 insertions, 281 deletions
diff --git a/vendor/golang.org/x/tools/internal/gocommand/invoke.go b/vendor/golang.org/x/tools/internal/gocommand/invoke.go
deleted file mode 100644
index f75336834..000000000
--- a/vendor/golang.org/x/tools/internal/gocommand/invoke.go
+++ /dev/null
@@ -1,281 +0,0 @@
-// 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 is a helper for calling the go command.
-package gocommand
-
-import (
-	"bytes"
-	"context"
-	"fmt"
-	"io"
-	"os"
-	"regexp"
-	"strconv"
-	"strings"
-	"sync"
-	"time"
-
-	exec "golang.org/x/sys/execabs"
-
-	"golang.org/x/tools/internal/event"
-)
-
-// An Runner will run go command invocations and serialize
-// them if it sees a concurrency error.
-type Runner struct {
-	// 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
-// 1.14: go: updating go.mod: existing contents have changed since last read
-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)
-	return stdout, friendly
-}
-
-// RunPiped runs the invocation serially, always waiting for any concurrent
-// invocations to complete first.
-func (runner *Runner) RunPiped(ctx context.Context, inv Invocation, stdout, stderr io.Writer) error {
-	_, err := runner.runPiped(ctx, inv, stdout, stderr)
-	return err
-}
-
-// 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) {
-	// 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) {
-	// Make sure the runner is always initialized.
-	runner.initialize()
-
-	// 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)
-}
-
-// An Invocation represents a call to the go command.
-type Invocation struct {
-	Verb       string
-	Args       []string
-	BuildFlags []string
-
-	// If ModFlag is set, the go command is invoked with -mod=ModFlag.
-	ModFlag string
-
-	// If ModFile is set, the go command is invoked with -modfile=ModFile.
-	ModFile string
-
-	// If Overlay is set, the go command is invoked with -overlay=Overlay.
-	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{})
-}
-
-func (i *Invocation) runWithFriendlyError(ctx context.Context, stdout, stderr io.Writer) (friendlyError error, rawError error) {
-	rawError = i.run(ctx, stdout, stderr)
-	if rawError != nil {
-		friendlyError = rawError
-		// Check for 'go' executable not being found.
-		if ee, ok := rawError.(*exec.Error); ok && ee.Err == exec.ErrNotFound {
-			friendlyError = fmt.Errorf("go command required, not found: %v", ee)
-		}
-		if ctx.Err() != nil {
-			friendlyError = ctx.Err()
-		}
-		friendlyError = fmt.Errorf("err: %v: stderr: %s", friendlyError, stderr)
-	}
-	return
-}
-
-func (i *Invocation) run(ctx context.Context, stdout, stderr io.Writer) error {
-	log := i.Logf
-	if log == nil {
-		log = func(string, ...interface{}) {}
-	}
-
-	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 "env", "version":
-		goArgs = append(goArgs, i.Args...)
-	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...)
-	cmd.Stdout = stdout
-	cmd.Stderr = stderr
-	// On darwin the cwd gets resolved to the real path, which breaks anything that
-	// expects the working directory to keep the original path, including the
-	// go command when dealing with modules.
-	// 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.
-	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)
-}
-
-// runCmdContext is like exec.CommandContext except it sends os.Interrupt
-// before os.Kill.
-func runCmdContext(ctx context.Context, cmd *exec.Cmd) error {
-	if err := cmd.Start(); err != nil {
-		return err
-	}
-	resChan := make(chan error, 1)
-	go func() {
-		resChan <- cmd.Wait()
-	}()
-
-	select {
-	case err := <-resChan:
-		return err
-	case <-ctx.Done():
-	}
-	// Cancelled. Interrupt and see if it ends voluntarily.
-	cmd.Process.Signal(os.Interrupt)
-	select {
-	case err := <-resChan:
-		return err
-	case <-time.After(time.Second):
-	}
-	// Didn't shut down in response to interrupt. Kill it hard.
-	cmd.Process.Kill()
-	return <-resChan
-}
-
-func cmdDebugStr(cmd *exec.Cmd) string {
-	env := make(map[string]string)
-	for _, kv := range cmd.Env {
-		split := strings.SplitN(kv, "=", 2)
-		k, v := split[0], split[1]
-		env[k] = v
-	}
-
-	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, " "))
-}