def extract_sdist()

in xar/pip_installer.py [0:0]

• 21 lines of code
• 5 McCabe index (conditional complexity)

    def extract_sdist(self, sdist, dest):
        """
        Extract the sdist archive and return the path to the source.
        """
        if sdist.lower().endswith(".zip"):
            open_sdist = zipfile.ZipFile
            error_cls = zipfile.BadZipfile
        else:
            assert ".tar" in sdist.lower()
            open_sdist = tarfile.TarFile.open
            error_cls = tarfile.ReadError
        try:
            with contextlib.closing(open_sdist(sdist)) as archive:
                archive.extractall(path=dest)

            def collapse_trivial(path):
                entries = os.listdir(path)
                if len(entries) == 1:
                    entry = os.path.join(path, entries[0])
                    if os.path.isdir(entry):
                        return collapse_trivial(entry)
                return path

            return collapse_trivial(dest)
        except error_cls:
            raise BuildException("Failed to extract %s" % os.path.basename(sdist))