def track()

in src/buildstream_plugins/sources/pip.py [0:0]

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

    def track(self, previous_sources_dir):  # pylint: disable=arguments-differ
        # XXX pip does not offer any public API other than the CLI tool so it
        # is not feasible to correctly parse the requirements file or to check
        # which package versions pip is going to install.
        # See https://pip.pypa.io/en/stable/user_guide/#using-pip-from-your-program
        # for details.
        # As a result, we have to wastefully install the packages during track.
        with self.tempdir() as tmpdir:
            install_args = self.host_pip + [
                "download",
                "--no-binary",
                ":all:",
                "--index-url",
                self.index_url,
                "--dest",
                tmpdir,
            ]
            for requirement_file in self.requirements_files:
                fpath = os.path.join(previous_sources_dir, requirement_file)
                install_args += ["-r", fpath]
            install_args += self.packages

            self.call(install_args, fail="Failed to install python packages")
            reqs = self._parse_sdist_names(tmpdir)

        return "\n".join(["{}=={}".format(pkg, ver) for pkg, ver in reqs])