diff options
Diffstat (limited to 'vendor/golang.org/x/tools/internal/gocommand')
3 files changed, 0 insertions, 441 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, " ")) -} diff --git a/vendor/golang.org/x/tools/internal/gocommand/vendor.go b/vendor/golang.org/x/tools/internal/gocommand/vendor.go deleted file mode 100644 index 2d3d408c0..000000000 --- a/vendor/golang.org/x/tools/internal/gocommand/vendor.go +++ /dev/null @@ -1,109 +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 - -import ( - "bytes" - "context" - "fmt" - "os" - "path/filepath" - "regexp" - "strings" - "time" - - "golang.org/x/mod/semver" -) - -// ModuleJSON holds information about a module. -type ModuleJSON struct { - Path string // module path - Version string // module version - Versions []string // available module versions (with -versions) - Replace *ModuleJSON // replaced by this module - Time *time.Time // time version was created - Update *ModuleJSON // available update, if any (with -u) - Main bool // is this the main module? - Indirect bool // is this module only an indirect dependency of main module? - Dir string // directory holding files for this module, if any - GoMod string // path to go.mod file used when loading this module, if any - GoVersion string // go version used in module -} - -var modFlagRegexp = regexp.MustCompile(`-mod[ =](\w+)`) - -// VendorEnabled reports whether vendoring is enabled. It takes a *Runner to execute Go commands -// with the supplied context.Context and Invocation. The Invocation can contain pre-defined fields, -// of which only Verb and Args are modified to run the appropriate Go command. -// Inspired by setDefaultBuildMod in modload/init.go -func VendorEnabled(ctx context.Context, inv Invocation, r *Runner) (bool, *ModuleJSON, error) { - mainMod, go114, err := getMainModuleAnd114(ctx, inv, r) - if err != nil { - return false, nil, err - } - - // We check the GOFLAGS to see if there is anything overridden or not. - inv.Verb = "env" - inv.Args = []string{"GOFLAGS"} - stdout, err := r.Run(ctx, inv) - if err != nil { - return false, nil, err - } - goflags := string(bytes.TrimSpace(stdout.Bytes())) - matches := modFlagRegexp.FindStringSubmatch(goflags) - var modFlag string - if len(matches) != 0 { - modFlag = matches[1] - } - // Don't override an explicit '-mod=' argument. - if modFlag == "vendor" { - return true, mainMod, nil - } else if modFlag != "" { - return false, nil, nil - } - if mainMod == nil || !go114 { - return false, nil, nil - } - // Check 1.14's automatic vendor mode. - if fi, err := os.Stat(filepath.Join(mainMod.Dir, "vendor")); err == nil && fi.IsDir() { - if mainMod.GoVersion != "" && semver.Compare("v"+mainMod.GoVersion, "v1.14") >= 0 { - // The Go version is at least 1.14, and a vendor directory exists. - // Set -mod=vendor by default. - return true, mainMod, nil - } - } - return false, nil, nil -} - -// getMainModuleAnd114 gets one of the main modules' information and whether the -// go command in use is 1.14+. This is the information needed to figure out -// if vendoring should be enabled. -func getMainModuleAnd114(ctx context.Context, inv Invocation, r *Runner) (*ModuleJSON, bool, error) { - const format = `{{.Path}} -{{.Dir}} -{{.GoMod}} -{{.GoVersion}} -{{range context.ReleaseTags}}{{if eq . "go1.14"}}{{.}}{{end}}{{end}} -` - inv.Verb = "list" - inv.Args = []string{"-m", "-f", format} - stdout, err := r.Run(ctx, inv) - if err != nil { - return nil, false, err - } - - lines := strings.Split(stdout.String(), "\n") - if len(lines) < 5 { - return nil, false, fmt.Errorf("unexpected stdout: %q", stdout.String()) - } - mod := &ModuleJSON{ - Path: lines[0], - Dir: lines[1], - GoMod: lines[2], - GoVersion: lines[3], - Main: true, - } - return mod, lines[4] == "go1.14", nil -} diff --git a/vendor/golang.org/x/tools/internal/gocommand/version.go b/vendor/golang.org/x/tools/internal/gocommand/version.go deleted file mode 100644 index 713043680..000000000 --- a/vendor/golang.org/x/tools/internal/gocommand/version.go +++ /dev/null @@ -1,51 +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 - -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}}`, `--`, `unsafe`} - 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) -} |