Merge pull request #12774 from SpenserCai/extensions_api

        self.add_api_route("/sdapi/v1/reload-checkpoint", self.reloadapi, methods=["POST"])

        self.add_api_route("/sdapi/v1/scripts", self.get_scripts_list, methods=["GET"], response_model=models.ScriptsList)

        self.add_api_route("/sdapi/v1/script-info", self.get_script_info, methods=["GET"], response_model=List[models.ScriptInfo])

        self.add_api_route("/sdapi/v1/extensions", self.get_extensions_list, methods=["GET"], response_model=List[models.ExtensionItem])

        if shared.cmd_opts.api_server_stop:

            self.add_api_route("/sdapi/v1/server-kill", self.kill_webui, methods=["POST"])

            cuda = {'error': f'{err}'}

        return models.MemoryResponse(ram=ram, cuda=cuda)

    def get_extensions_list(self):

        from modules import extensions

        extensions.list_extensions()

        ext_list = []

        for ext in extensions.extensions:

            ext: extensions.Extension

            ext.read_info_from_repo()

            if ext.remote is not None:

                ext_list.append({

                    "name": ext.name,

                    "remote": ext.remote,

                    "branch": ext.branch,

                    "commit_hash":ext.commit_hash,

                    "commit_date":ext.commit_date,

                    "version":ext.version,

                    "enabled":ext.enabled

                })

        return ext_list

    def launch(self, server_name, port, root_path):

        self.app.include_router(self.router)

        uvicorn.run(self.app, host=server_name, port=port, timeout_keep_alive=shared.cmd_opts.timeout_keep_alive, root_path=root_path)

    is_alwayson: bool = Field(default=None, title="IsAlwayson", description="Flag specifying whether this script is an alwayson script")

    is_img2img: bool = Field(default=None, title="IsImg2img", description="Flag specifying whether this script is an img2img script")

    args: List[ScriptArg] = Field(title="Arguments", description="List of script's arguments")

class ExtensionItem(BaseModel):

    name: str = Field(title="Name", description="Extension name")

    remote: str = Field(title="Remote", description="Extension Repository URL")

    branch: str = Field(title="Branch", description="Extension Repository Branch")

    commit_hash: str = Field(title="Commit Hash", description="Extension Repository Commit Hash")

    version: str = Field(title="Version", description="Extension Version")

    commit_date: str = Field(title="Commit Date", description="Extension Repository Commit Date")

    enabled: bool = Field(title="Enabled", description="Flag specifying whether this extension is enabled")