def load_pip_requirements(self, files_map=None, freeze=True):
        if files_map is None:
            files_map = self.default_pip_files
        for group, requirements_txt in files_map.items():
            path = Path(requirements_txt)
            if not path.exists() and group.lower() == "all" and freeze:
                cmd = envoy.run("pip freeze")
                self[group].loads(cmd.std_out)
            elif path.exists():
                self[group].load(path)
def patch(self):
        """Adjust OpenFOAM build for spack.
           Where needed, apply filter as an alternative to normal patching."""
        self.rename_source()
        add_extra_files(self, self.common, self.assets)

        # Avoid WM_PROJECT_INST_DIR for ThirdParty, site or jobControl.
        # Use openfoam-site.patch to handle jobControl, site.
        #
        # Filtering: bashrc,cshrc (using a patch is less flexible)
        edits = {
            'WM_THIRD_PARTY_DIR':
            r'$WM_PROJECT_DIR/ThirdParty #SPACK: No separate third-party',
            'WM_VERSION': str(self.version),  # consistency
            'FOAMY_HEX_MESH': '',  # This is horrible (unset variable?)
        }
        rewrite_environ_files(  # Adjust etc/bashrc and etc/cshrc
            edits,
            posix=join_path('etc', 'bashrc'),
            cshell=join_path('etc', 'cshrc'))