// path name for a given file is not guaranteed to be unique.
// Abs calls [Clean] on the result.
func Abs(path string) (string, error) {
	return abs(path)
}

func unixAbs(path string) (string, error) {
	if IsAbs(path) {
		return Clean(path), nil
	}
	wd, err := os.Getwd()
	if err != nil {
		return "", err
	}
	return Join(wd, path), nil
}

	"plan9":     true,
	"solaris":   true,
	"wasip1":    true,
	"windows":   true,
	"zos":       true,
}

// unixOS is the set of GOOS values matched by the "unix" build tag.
// This is not used for filename matching.
// This is the same list as in go/build/syslist.go and cmd/dist/build.go.
var unixOS = map[string]bool{
	"aix":       true,
	"android":   true,
	"darwin":    true,
	"dragonfly": true,
	"freebsd":   true,

		return true
	}
	if ctxt.GOOS == "illumos" && name == "solaris" {
		return true
	}
	if ctxt.GOOS == "ios" && name == "darwin" {
		return true
	}
	if name == "unix" && unixOS[ctxt.GOOS] {
		return true
	}
	if name == "boringcrypto" {
		name = "goexperiment.boringcrypto" // boringcrypto is an old name for goexperiment.boringcrypto
	}

	// other tags