"path"
	"slices"
	"strings"
	"time"
)

// Writer provides sequential writing of a tar archive.
// [Writer.WriteHeader] begins a new file with the provided [Header],
// and then Writer can be treated as an io.Writer to supply that file's data.
type Writer struct {
	w    io.Writer
	pad  int64      // Amount of padding to write after current file entry
	curr fileWriter // Writer for current file entry

// size. If the argument io.Writer is already a [Writer] with large enough
// size, it returns the underlying [Writer].
func NewWriterSize(w io.Writer, size int) *Writer {
	// Is it already a Writer?
	b, ok := w.(*Writer)
	if ok && len(b.buf) >= size {
		return b
	}
	if size <= 0 {
		size = defaultBufSize
	}
	return &Writer{
		buf: make([]byte, size),
		wr:  w,
	}
}

	"errors"
	"io"
	"sync"
)

// A Compressor returns a new compressing writer, writing to w.
// The WriteCloser's Close method must be used to flush pending data to w.
// The Compressor itself must be safe to invoke from multiple goroutines
// simultaneously, but each returned writer will be used only by
// one goroutine at a time.
type Compressor func(w io.Writer) (io.WriteCloser, error)

func eval(x constraint.Expr, tags map[string]bool, prefer bool) bool {
	switch x := x.(type) {
	case *constraint.TagExpr:
		return matchTag(x.Tag, tags, prefer)
	case *constraint.NotExpr:
		return !eval(x.X, tags, !prefer)
	case *constraint.AndExpr:
		return eval(x.X, tags, prefer) && eval(x.Y, tags, prefer)
	case *constraint.OrExpr:
		return eval(x.X, tags, prefer) || eval(x.Y, tags, prefer)
	}

	{{.UsageLine}}

{{end}}{{.Long | trim}}


{{end}}{{end}}`

// commentWriter writes a Go comment to the underlying io.Writer,
// using line comment form (//).
type commentWriter struct {
	W            io.Writer
	wroteSlashes bool // Wrote "//" at the beginning of the current line.
}

func (c *commentWriter) Write(p []byte) (int, error) {
	var n int
	for i, b := range p {

import (
	"bufio"
	"bytes"
	"fmt"
	"internal/buildcfg"
	"internal/testenv"
	"os"
	"testing"

	"cmd/internal/bio"
	"cmd/internal/objabi"
)

func dummyWriter(buf *bytes.Buffer) *Writer {
	wr := &bio.Writer{Writer: bufio.NewWriter(buf)} // hacky: no file, so cannot seek
	return NewWriter(wr)
}

func TestReadWrite(t *testing.T) {
	// Test that we get the same data in a write-read roundtrip.

				return "", nil
			}
			return metaFile, nil
		}
	}
	return "", fmt.Errorf("internal error: unable to locate build action for package %q run action", p.ImportPath)
}

// WriteCoveragePercent writes out to the writer 'w' a "percent
// statements covered" for the package whose test-run action is
// 'runAct', based on the meta-data file 'mf'. This helper is used in
// cases where a user runs "go test -cover" on a package that has

// See comments in ARM64latelower.rules...

# The current version of a module should not be considered when loading
# retractions. If the current version is +incompatible, we should not prefer
# +incompatible versions when looking for retractions.
# Verifies #42601.

go mod init m

# Request a +incompatible version retracted in v1.0.0.
go get example.com/retract/incompatible@v2.0.0+incompatible
stderr '^go: warning: example.com/retract/incompatible@v2.0.0\+incompatible: retracted by module author$'

go test -c ./pkg/...
exists -exec pkg1.test$GOEXE
exists -exec pkg2.test$GOEXE

! go test -c -o $WORK/bin/test/bin.test.exe ./pkg/...
stderr '^with multiple packages, -o must refer to a directory or '$devnull

! go test -c ./...
stderr '^cannot write test binary pkg1.test for multiple packages:\nexample/anotherpkg/pkg1\nexample/pkg/pkg1'

! go test -c -o $WORK/bin/test/ ./...