debian

var GlobalVars = sync.OnceValue(func() (ret struct {
	ErrMissingControlFile     error
	ErrUnsupportedCompression error
	ErrInvalidName            error
	ErrInvalidVersion         error
	ErrInvalidArchitecture    error

	namePattern    *regexp.Regexp
	versionPattern *regexp.Regexp
	symbolPattern  *regexp.Regexp
},
) {
	ret.ErrMissingControlFile = util.NewInvalidArgumentErrorf("control file is missing")
	ret.ErrUnsupportedCompression = util.NewInvalidArgumentErrorf("unsupported compression algorithm")
	ret.ErrInvalidName = util.NewInvalidArgumentErrorf("package name is invalid")
	ret.ErrInvalidVersion = util.NewInvalidArgumentErrorf("package version is invalid")
	ret.ErrInvalidArchitecture = util.NewInvalidArgumentErrorf("package architecture is invalid")

	ret.namePattern = regexp.MustCompile(`\A[a-z0-9][a-z0-9+-.]+\z`)

	ret.versionPattern = regexp.MustCompile(`\A(?:(0|[1-9][0-9]*):)?[a-zA-Z0-9.+~]+(?:-[a-zA-Z0-9.+-~]+)?\z`)

	ret.symbolPattern = regexp.MustCompile(`\A[a-zA-Z0-9][a-zA-Z0-9.~+_-]*\z`)
	return ret
})