return 0
	}
	return float64(covered) / float64(total) * 100
}

// htmlGen generates an HTML coverage report with the provided filename,
// source code, and tokens, and writes it to the given Writer.
func htmlGen(w io.Writer, src []byte, boundaries []cover.Boundary) error {
	dst := bufio.NewWriter(w)
	for i := range src {
		for len(boundaries) > 0 && boundaries[0].Offset == i {
			b := boundaries[0]
			if b.Start {

// to given io.Writer.
func WithBuildXWriter(ctx context.Context, xLog io.Writer) context.Context {
	return context.WithValue(ctx, buildXContextKey{}, xLog)
}

type buildXContextKey struct{}

// BuildXWriter returns nil if BuildX is false, or
// the writer to which BuildX output should be written otherwise.
func BuildXWriter(ctx context.Context) (io.Writer, bool) {
	if !BuildX {
		return nil, false

static void CRaiseSIGPIPE() {
	int fds[2];

	if (pipe(fds) == -1) {
		perror("pipe");
		exit(EXIT_FAILURE);
	}
	// Close the reader end
	close(fds[0]);
	// Write to the writer end to provoke a SIGPIPE
	if (write(fds[1], "some data", 9) != -1) {
		fprintf(stderr, "write to a closed pipe succeeded\n");
		exit(EXIT_FAILURE);
	}
	close(fds[1]);
}
*/
import "C"

import (
	"fmt"
	"os"
	"runtime"
)

// Logf writes output to the script's log without updating its stdout or stderr
// buffers. (The output log functions as a kind of meta-stderr.)
func (s *State) Logf(format string, args ...any) {
	fmt.Fprintf(&s.log, format, args...)
}

// flushLog writes the contents of the script's log to w and clears the log.
func (s *State) flushLog(w io.Writer) error {
	_, err := w.Write(s.log.Bytes())

`

func printGoVersion(w io.Writer) {
	fmt.Fprintf(w, "### What version of Go are you using (`go version`)?\n\n")
	fmt.Fprintf(w, "<pre>\n")
	fmt.Fprintf(w, "$ go version\n")
	fmt.Fprintf(w, "go version %s %s/%s\n", runtime.Version(), runtime.GOOS, runtime.GOARCH)
	fmt.Fprintf(w, "</pre>\n")
	fmt.Fprintf(w, "\n")
}

func printEnvDetails(w io.Writer) {

		base.Fatalf("%v", err)
	}
	coverMerge.f = f
}

// mergeCoverProfile merges file into the profile stored in testCoverProfile.
// It prints any errors it encounters to ew.
func mergeCoverProfile(ew io.Writer, file string) {
	if coverMerge.f == nil {
		return
	}
	coverMerge.Lock()
	defer coverMerge.Unlock()

	expect := fmt.Sprintf("mode: %s\n", cfg.BuildCoverMode)
	buf := make([]byte, len(expect))

	var buf bytes.Buffer
	FDumpList(&buf, s, list)
	os.Stdout.Write(buf.Bytes())
}

// FDumpList prints to w the message s followed by a debug dump of each node in the list.
func FDumpList(w io.Writer, s string, list Nodes) {
	io.WriteString(w, s)
	dumpNodes(w, list, 1)
	io.WriteString(w, "\n")
}

// indent prints indentation to w.
func indent(w io.Writer, depth int) {
	fmt.Fprint(w, "\n")

		Short:   fmt.Sprintf("%012d", log.Logentry.Revision),
		Time:    t.UTC(),
		Version: rev,
	}
	return info, nil
}

func svnReadZip(ctx context.Context, dst io.Writer, workDir, rev, subdir, remote string) (err error) {
	// The subversion CLI doesn't provide a command to write the repository
	// directly to an archive, so we need to export it to the local filesystem
	// instead. Unfortunately, the local filesystem might apply arbitrary

	telemetry.Start()
	dirsInit()
	err := do(os.Stdout, flag.CommandLine, os.Args[1:])
	if err != nil {
		log.Fatal(err)
	}
}

// do is the workhorse, broken out of main to make testing easier.
func do(writer io.Writer, flagSet *flag.FlagSet, args []string) (err error) {
	flagSet.Usage = usage
	unexported = false
	matchCase = false
	flagSet.StringVar(&chdir, "C", "", "change to `dir` before running command")

	err = s.engine.Execute(st, scriptName, bufio.NewReader(bytes.NewReader(ar.Comment)), scriptLog)
	closeErr := st.CloseAndWait(scriptLog)
	logger.Printf("%s:", scriptName)
	io.WriteString(logger.Writer(), scriptLog.String())
	io.WriteString(logger.Writer(), "\n")
	if err != nil {
		return nil, err
	}
	if closeErr != nil {
		return nil, err
	}

	sc, err := getScriptCtx(st)
	if err != nil {
		return nil, err
	}