From e3cafeaf9292f67459ff1d186f68283bfaedf2ae Mon Sep 17 00:00:00 2001 From: Wim Date: Mon, 31 Jan 2022 00:27:37 +0100 Subject: Add dependencies/vendor (whatsapp) --- .../x/tools/internal/gocommand/invoke.go | 273 +++++++++++++++++++++ .../x/tools/internal/gocommand/vendor.go | 107 ++++++++ .../x/tools/internal/gocommand/version.go | 51 ++++ 3 files changed, 431 insertions(+) create mode 100644 vendor/golang.org/x/tools/internal/gocommand/invoke.go create mode 100644 vendor/golang.org/x/tools/internal/gocommand/vendor.go create mode 100644 vendor/golang.org/x/tools/internal/gocommand/version.go (limited to 'vendor/golang.org/x/tools/internal/gocommand') diff --git a/vendor/golang.org/x/tools/internal/gocommand/invoke.go b/vendor/golang.org/x/tools/internal/gocommand/invoke.go new file mode 100644 index 00000000..8659a0c5 --- /dev/null +++ b/vendor/golang.org/x/tools/internal/gocommand/invoke.go @@ -0,0 +1,273 @@ +// 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" + exec "golang.org/x/sys/execabs" + "io" + "os" + "regexp" + "strconv" + "strings" + "sync" + "time" + + "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 + 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{}) +} + +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 new file mode 100644 index 00000000..5e75bd6d --- /dev/null +++ b/vendor/golang.org/x/tools/internal/gocommand/vendor.go @@ -0,0 +1,107 @@ +// 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) (*ModuleJSON, bool, error) { + mainMod, go114, err := getMainModuleAnd114(ctx, inv, r) + if err != nil { + return nil, false, 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 nil, false, err + } + goflags := string(bytes.TrimSpace(stdout.Bytes())) + matches := modFlagRegexp.FindStringSubmatch(goflags) + var modFlag string + if len(matches) != 0 { + modFlag = matches[1] + } + if modFlag != "" { + // Don't override an explicit '-mod=' argument. + return mainMod, modFlag == "vendor", nil + } + if mainMod == nil || !go114 { + return mainMod, false, 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 mainMod, true, nil + } + } + return mainMod, false, nil +} + +// getMainModuleAnd114 gets the main module's 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 new file mode 100644 index 00000000..71304368 --- /dev/null +++ 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}}`, `--`, `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) +} -- cgit v1.2.3