ptest = new(Package)
		*ptest = *p
		ptest.Error = ptestErr
		ptest.Incomplete = incomplete
		ptest.ForTest = p.ImportPath
		ptest.GoFiles = nil
		ptest.GoFiles = append(ptest.GoFiles, p.GoFiles...)
		ptest.GoFiles = append(ptest.GoFiles, p.TestGoFiles...)
		ptest.Target = ""
		// Note: The preparation of the vet config requires that common
		// indexes in ptest.Imports and ptest.Internal.RawImports

	p.Target = "" // must build - not up to date
	if p.Internal.CmdlineFiles {
		//set executable name if go file is given as cmd-argument
		var src string
		if len(p.GoFiles) > 0 {
			src = p.GoFiles[0]
		} else if len(p.CgoFiles) > 0 {
			src = p.CgoFiles[0]
		} else {
			// this case could only happen if the provided source uses cgo
			// while cgo is disabled.
			hint := ""
			if !cfg.BuildContext.CgoEnabled {

				// Skip this error, as we will format
				// all files regardless.
			} else {
				base.Errorf("%v", pkg.Error)
				continue
			}
		}
		// Use pkg.gofiles instead of pkg.Dir so that
		// the command only applies to this package,
		// not to packages in subdirectories.
		files := base.RelPaths(pkg.InternalAllGoFiles())
		for _, file := range files {

	// same basename, so go from the overlay contents file path (passed to the compiler)
	// to the path the disk path would be rewritten to.

	cgoFiles := make(map[string]bool)
	for _, f := range a.Package.CgoFiles {
		cgoFiles[f] = true
	}

	// TODO(matloob): Higher up in the stack, when the logic for deciding when to make copies

		if modload.Enabled() && pkg.Module != nil && !pkg.Module.Main {
			if !printed {
				fmt.Fprintf(os.Stderr, "go: not fixing packages in dependency modules\n")
				printed = true
			}
			continue
		}
		// Use pkg.gofiles instead of pkg.Dir so that
		// the command only applies to this package,
		// not to packages in subdirectories.
		files := base.RelPaths(pkg.InternalAllGoFiles())
		goVersion := ""
		if pkg.Module != nil {

	Dir                       string // (unused)
	ImportPath                string // package path
	GoVersion                 string // minimum required Go version, such as "go1.21.0"
	GoFiles                   []string
	NonGoFiles                []string
	IgnoredFiles              []string
	ImportMap                 map[string]string // maps import path to package path

	var (
		goFiles     = make(map[string]*ast.File)
		testGoFiles []*ast.File
	)
	for i := range files {
		f := fset.File(files[i].Pos())
		if f == nil {
			return nil, fmt.Errorf("file files[%d] is not found in the provided file set", i)
		}
		switch name := f.Name(); {
		case strings.HasSuffix(name, ".go") && !strings.HasSuffix(name, "_test.go"):
			goFiles[name] = files[i]

	return errs
}

// packageDir tries to figure out the directory of the specified package.
func packageDir(pkg *packages.Package) string {
	if len(pkg.GoFiles) > 0 {
		return filepath.Dir(pkg.GoFiles[0])
	}
	if len(pkg.IgnoredFiles) > 0 {
		return filepath.Dir(pkg.IgnoredFiles[0])
	}
	return ""
}

type FileFormat struct {
	Rules        []Rule
	InverseRules []Rule

	return nil
}

func (tools gccgoToolchain) asm(b *Builder, a *Action, sfiles []string) ([]string, error) {
	p := a.Package
	var ofiles []string
	for _, sfile := range sfiles {
		base := filepath.Base(sfile)
		ofile := a.Objdir + base[:len(base)-len(".s")] + ".o"
		ofiles = append(ofiles, ofile)
		sfile, _ = fsys.OverlayPath(mkAbs(p.Dir, sfile))
		defs := []string{"-D", "GOOS_" + cfg.Goos, "-D", "GOARCH_" + cfg.Goarch}

// exeFromFiles returns an executable name for a package
// using the first element in GoFiles or CgoFiles collections without the prefix.
//
// Returns empty string in case of empty collection.
func (p *Package) exeFromFiles() string {
	var src string
	if len(p.GoFiles) > 0 {
		src = p.GoFiles[0]
	} else if len(p.CgoFiles) > 0 {
		src = p.CgoFiles[0]
	} else {
		return ""
	}
	_, elem := filepath.Split(src)