env.py 文件源码

def _gen_requirements_file(self, requirements_list) -> str:
        modules = {}
        for req in requirements_list:
            name, req_spec = self._parse_line(req)

            if name is None:
                name = req

            url = None
            version = None
            try:
                # this will fail is an url is supplied
                parsed_req = list(pkg_resources.parse_requirements(req_spec))
                if len(parsed_req) > 0:
                    item = parsed_req[0]
                    if hasattr(item, "name"):
                        name = item.name
                    elif hasattr(item, "unsafe_name"):
                        name = item.unsafe_name
                    version = item.specs
                    if hasattr(item, "url"):
                        url = item.url
            except pkg_resources.RequirementParseError:
                url = req_spec

            if name not in modules:
                modules[name] = {"name": name, "version": []}

            if version is not None:
                modules[name]["version"].extend(version)

            if url is not None:
                modules[name]["url"] = url

        requirements_file = ""
        for module, info in modules.items():
            version_spec = ""
            if len(info["version"]) > 0:
                version_spec = " " + (", ".join(["%s %s" % (a, b) for a, b in info["version"]]))

            if "url" in info:
                module = info["url"]

            requirements_file += module + version_spec + "\n"

        return requirements_file