Finds all files to add to the tarball

def find_files_to_add(self, exclude_build=True):  # type: (bool) -> list
        """
        Finds all files to add to the tarball
        """
        to_add = []

        for include in self._module.includes:
            for file in include.elements:
                if "__pycache__" in str(file):
                    continue

                if file.is_dir():
                    continue

                file = file.relative_to(self._path)

                if self.is_excluded(file) and isinstance(include, PackageInclude):
                    continue

                if file.suffix == ".pyc":
                    continue

                if file in to_add:
                    # Skip duplicates
                    continue

                self._io.writeln(
                    " - Adding: <comment>{}</comment>".format(str(file)),
                    verbosity=self._io.VERBOSITY_VERY_VERBOSE,
                )
                to_add.append(file)

        # Include project files
        self._io.writeln(
            " - Adding: <comment>pyproject.toml</comment>",
            verbosity=self._io.VERBOSITY_VERY_VERBOSE,
        )
        to_add.append(Path("pyproject.toml"))

        # If a license file exists, add it
        for license_file in self._path.glob("LICENSE*"):
            self._io.writeln(
                " - Adding: <comment>{}</comment>".format(
                    license_file.relative_to(self._path)
                ),
                verbosity=self._io.VERBOSITY_VERY_VERBOSE,
            )
            to_add.append(license_file.relative_to(self._path))

        # If a README is specificed we need to include it
        # to avoid errors
        if "readme" in self._poetry.local_config:
            readme = self._path / self._poetry.local_config["readme"]
            if readme.exists():
                self._io.writeln(
                    " - Adding: <comment>{}</comment>".format(
                        readme.relative_to(self._path)
                    ),
                    verbosity=self._io.VERBOSITY_VERY_VERBOSE,
                )
                to_add.append(readme.relative_to(self._path))

        # If a build script is specified and explicitely required
        # we add it to the list of files
        if self._package.build and not exclude_build:
            to_add.append(Path(self._package.build))

        return sorted(to_add)