func (p *Package) exeFromImportPath() string {
	_, elem := pathpkg.Split(p.ImportPath)
	if cfg.ModulesEnabled {
		// If this is example.com/mycmd/v2, it's more useful to
		// install it as mycmd than as v2. See golang.org/issue/24667.
		if elem != p.ImportPath && isVersionElement(elem) {
			_, elem = pathpkg.Split(pathpkg.Dir(p.ImportPath))
		}
	}
	return elem
}

// allows for virtual overlays on top of the files on disk.
package fsys

import (
	"encoding/json"
	"errors"
	"fmt"
	"internal/godebug"
	"io"
	"io/fs"
	"log"
	"os"
	pathpkg "path"
	"path/filepath"
	"runtime"
	"runtime/debug"
	"sort"
	"strings"
	"sync"
	"time"
)

// Trace emits a trace event for the operation and file path to the trace log,

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

package modload

import (
	"context"
	"errors"
	"fmt"
	"go/build"
	"io/fs"
	"os"
	pathpkg "path"
	"path/filepath"
	"sort"
	"strings"

	"cmd/go/internal/cfg"
	"cmd/go/internal/fsys"
	"cmd/go/internal/gover"
	"cmd/go/internal/modfetch"
	"cmd/go/internal/modindex"
	"cmd/go/internal/par"

// if those packages are not found in existing dependencies of the main module.

import (
	"context"
	"errors"
	"fmt"
	"go/build"
	"internal/diff"
	"io/fs"
	"maps"
	"os"
	"path"
	pathpkg "path"
	"path/filepath"
	"runtime"
	"slices"
	"sort"
	"strings"
	"sync"
	"sync/atomic"

	"cmd/go/internal/base"
	"cmd/go/internal/cfg"
	"cmd/go/internal/fsys"
	"cmd/go/internal/gover"

	"go/ast"
	"go/build/constraint"
	"go/doc"
	"go/token"
	"internal/buildcfg"
	"internal/godebug"
	"internal/goroot"
	"internal/goversion"
	"internal/platform"
	"io"
	"io/fs"
	"os"
	"os/exec"
	pathpkg "path"
	"path/filepath"
	"runtime"
	"slices"
	"strconv"
	"strings"
	"unicode"
	"unicode/utf8"
	_ "unsafe" // for linkname
)

// A Context specifies the supporting context for a build.

	if path == "" {
		return EINVAL
	}
	dirFd, pathPtr, pathLen := preparePath(path)
	errno := path_unlink_file(dirFd, pathPtr, pathLen)
	return errnoErr(errno)
}

func Rmdir(path string) error {
	if path == "" {
		return EINVAL
	}
	dirFd, pathPtr, pathLen := preparePath(path)
	errno := path_remove_directory(dirFd, pathPtr, pathLen)
	return errnoErr(errno)
}

var memprofileflag = flag.String("memprofile", "", "Write memory profile to specified file")
var memprofilerateflag = flag.Int("memprofilerate", 0, "Set memprofile sampling rate to value")

var matchpkg func(name string) bool

var atExitFuncs []func()

func atExit(f func()) {
	atExitFuncs = append(atExitFuncs, f)
}

func Exit(code int) {
	for i := len(atExitFuncs) - 1; i >= 0; i-- {
		f := atExitFuncs[i]

func Chdir(path string) (err error) {
	pathp, err := UTF16PtrFromString(path)
	if err != nil {
		return err
	}
	return SetCurrentDirectory(pathp)
}

func Mkdir(path string, mode uint32) (err error) {
	pathp, err := UTF16PtrFromString(path)
	if err != nil {
		return err
	}
	return CreateDirectory(pathp, nil)
}

func Rmdir(path string) (err error) {
	pathp, err := UTF16PtrFromString(path)

	trimSpace := func() {
		trim := strings.TrimLeftFunc(args, unicode.IsSpace)
		trimBytes(len(args) - len(trim))
	}

	var list []fileEmbed
	for trimSpace(); args != ""; trimSpace() {
		var path string
		pathPos := pos
	Switch:
		switch args[0] {
		default:
			i := len(args)
			for j, c := range args {
				if unicode.IsSpace(c) {
					i = j
					break
				}
			}
			path = args[:i]

	if fs.path == "" {
		// already done
		return nil
	}
	var path string
	if fs.appendNameToPath {
		path = fixLongPath(fs.path + `\` + fs.name)
	} else {
		path = fs.path
	}
	pathp, err := syscall.UTF16PtrFromString(path)
	if err != nil {
		return err
	}

	// Per https://learn.microsoft.com/en-us/windows/win32/fileio/reparse-points-and-file-operations,