)

func openFile(name string, flag int, perm fs.FileMode) (*os.File, error) {
	// On BSD systems, we could add the O_SHLOCK or O_EXLOCK flag to the OpenFile
	// call instead of locking separately, but we have to support separate locking
	// calls for Linux and Windows anyway, so it's simpler to use that approach
	// consistently.

	f, err := os.OpenFile(name, flag&^os.O_TRUNC, perm)
	if err != nil {
		return nil, err
	}

// Run the game of life in C using Go for parallelization.

package main

import (
	"flag"
	"fmt"
	"plugin"
)

const MAXDIM = 100

var dim = flag.Int("dim", 16, "board dimensions")
var gen = flag.Int("gen", 10, "generations")

func main() {
	flag.Parse()

	var a [MAXDIM * MAXDIM]int32
	for i := 2; i < *dim; i += 8 {
		for j := 2; j < *dim-3; j += 8 {

	"cmd/go/internal/cfg"
	"cmd/go/internal/load"
	"cmd/go/internal/modload"
	"cmd/internal/sys"
)

func init() {
	base.AddBuildFlagsNX(&CmdFmt.Flag)
	base.AddChdirFlag(&CmdFmt.Flag)
	base.AddModFlag(&CmdFmt.Flag)
	base.AddModCommonFlags(&CmdFmt.Flag)
}

var CmdFmt = &base.Command{
	Run:       runFmt,
	UsageLine: "go fmt [-n] [-x] [packages]",
	Short:     "gofmt (reformat) package sources",
	Long: `

)

func main() {
	telemetry.Start()
	flag.Usage = func() {
		fmt.Fprint(os.Stderr, usageMessage)
		os.Exit(2)
	}
	flag.Parse()
	telemetry.Inc("trace/invocations")
	telemetry.CountFlags("trace/flag:", *flag.CommandLine)

	// Go 1.7 traces embed symbol info and does not require the binary.
	// But we optionally accept binary as first arg for Go 1.5 traces.
	switch flag.NArg() {
	case 1:
		traceFile = flag.Arg(0)

		if cmd.CustomFlags {
			if !strings.Contains(string(script), "# "+name+"\n") {
				t.Errorf("%s has custom flags, not tested in testdata/script/chdir.txt", name)
			}
			return
		}
		f := cmd.Flag.Lookup("C")
		if f == nil {
			t.Errorf("%s has no -C flag", name)
		} else if f.Usage != "AddChdirFlag" {
			t.Errorf("%s has -C flag but not from AddChdirFlag", name)
		}
	}
	walk("go", base.Go)

import (
	"testing"
	"fmt"
	"flag"
)

// This test ensures the order of CONT lines in parallel chatty tests.
func TestChattyParallel(t *testing.T) {
	t.Parallel()

	// The number of concurrent tests running. This is closely tied to the
	// -parallel test flag, so we grab it from the flag rather than setting it
	// to some constant.
	parallel := flag.Lookup("test.parallel").Value.(flag.Getter).Get().(int)

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package main

import (
	"flag"
	"internal/testenv"
	"io/fs"
	"os"
	"path/filepath"
	"testing"

	"golang.org/x/build/relnote"
)

var flagCheck = flag.Bool("check", false, "run API release note checks")

// Check that each file in api/next has corresponding release note files in doc/next.

# bad flags are diagnosed
env GOFLAGS=-typoflag
! go list runtime
stderr 'unknown flag -typoflag'

env GOFLAGS=-
! go list runtime
stderr '^go: parsing \$GOFLAGS: non-flag "-"'

env GOFLAGS=--
! go list runtime
stderr '^go: parsing \$GOFLAGS: non-flag "--"'

env GOFLAGS=---oops
! go list runtime
stderr '^go: parsing \$GOFLAGS: non-flag "---oops"'

env GOFLAGS=-=noname
! go list runtime

// The -fmt flag reformats the go.work file without making other changes.
// This reformatting is also implied by any other modifications that use or
// rewrite the go.mod file. The only time this flag is needed is if no other
// flags are specified, as in 'go work edit -fmt'.
//
// The -godebug=key=value flag adds a godebug key=value line,
// replacing any existing godebug lines with the given key.
//

import (
	"archive/zip"
	"bufio"
	"bytes"
	"flag"
	"fmt"
	"io"
	"log"
	"os"
	"strings"
	"time"

	"cmd/go/internal/cfg"
	"cmd/go/internal/modfetch/codehost"
)

func usage() {
	fmt.Fprintf(os.Stderr, "usage: go run shell.go vcs remote\n")
	os.Exit(2)
}

func main() {
	cfg.GOMODCACHE = "/tmp/vcswork"
	log.SetFlags(0)
	log.SetPrefix("shell: ")
	flag.Usage = usage
	flag.Parse()