def build()

in antlir/compiler/items/user.py [0:0]
32 lines of code
8 McCabe index (conditional complexity)

    def build(self, subvol: Subvol, layer_opts: LayerOpts = None):
        with USERGROUP_LOCK:
            group_file = GroupFile(_read_group_file(subvol))

            # this should already be checked by requires/provides
            assert (
                self.primary_group in group_file.nameToGID
            ), f"primary_group `{self.primary_group}` missing from /etc/group"

            for groupname in self.supplementary_groups:
                group_file.join(groupname, self.name)
            # pyre-fixme[6]: Expected `AnyStr` for 2nd param but got
            # `GroupFile`.
            _write_group_file(subvol, group_file)

            passwd_file = PasswdFile(_read_passwd_file(subvol))
            uid = self.id or passwd_file.next_user_id()
            passwd_file.add(
                PasswdFileLine(
                    name=self.name,
                    uid=uid,
                    gid=group_file.nameToGID[self.primary_group],
                    # pyre-fixme[6]: Expected `str` for 4th param but got
                    # `Optional[str]`.
                    comment=self.comment,
                    directory=self.home_dir,
                    shell=self.shell,
                )
            )
            # pyre-fixme[6]: Expected `AnyStr` for 2nd param but got
            # `PasswdFile`.
            _write_passwd_file(subvol, passwd_file)
            # Read in our current shadow file
            # If we don't already have a shadow file, make one from passwd
            if subvol.path(SHADOW_FILE_PATH).exists():
                shadow_file = ShadowFile(_read_shadow_file(subvol))
                shadow_file.add(
                    ShadowFileLine(
                        name=self.name,
                    )
                )
            else:
                shadow_file = pwconv(passwd_file)
            # pyre-fixme[6]: Expected `AnyStr` for 2nd param but got
            #  `Union[ShadowFile, str]`.
            _write_shadow_file(subvol, shadow_file)