fix: Prevent backslashes in descriptions from breaking docstrings [#735]. Thanks @robertschweizer & @bryan-hunt! (#735)

Co-authored-by: Dylan Anthony <dbanty@users.noreply.github.com>

Author: robertschweizer

end_to_end_tests/custom-templates-golden-record/my_test_api_client/api/tests/__init__.py

@@ -5,6 +5,7 @@
 from . import (
     callback_test,
     defaults_tests_defaults_post,
+    description_with_backslash,
     get_basic_list_of_booleans,
     get_basic_list_of_floats,
     get_basic_list_of_integers,
@@ -158,3 +159,10 @@ def callback_test(cls) -> types.ModuleType:
         Try sending a request related to a callback
         """
         return callback_test
+
+    @classmethod
+    def description_with_backslash(cls) -> types.ModuleType:
+        """
+            Test description with \
+        """
+        return description_with_backslash

end_to_end_tests/golden-record/my_test_api_client/api/tests/description_with_backslash.py

@@ -0,0 +1,98 @@
+from http import HTTPStatus
+from typing import Any, Dict, Optional
+
+import httpx
+
+from ... import errors
+from ...client import Client
+from ...types import Response
+
+
+def _get_kwargs(
+    *,
+    client: Client,
+) -> Dict[str, Any]:
+    url = "{}/tests/description-with-backslash".format(client.base_url)
+
+    headers: Dict[str, str] = client.get_headers()
+    cookies: Dict[str, Any] = client.get_cookies()
+
+    return {
+        "method": "get",
+        "url": url,
+        "headers": headers,
+        "cookies": cookies,
+        "timeout": client.get_timeout(),
+    }
+
+
+def _parse_response(*, client: Client, response: httpx.Response) -> Optional[Any]:
+    if response.status_code == HTTPStatus.OK:
+        return None
+    if client.raise_on_unexpected_status:
+        raise errors.UnexpectedStatus(f"Unexpected status code: {response.status_code}")
+    else:
+        return None
+
+
+def _build_response(*, client: Client, response: httpx.Response) -> Response[Any]:
+    return Response(
+        status_code=HTTPStatus(response.status_code),
+        content=response.content,
+        headers=response.headers,
+        parsed=_parse_response(client=client, response=response),
+    )
+
+
+def sync_detailed(
+    *,
+    client: Client,
+) -> Response[Any]:
+    r""" Test description with \
+
+     Test description with \
+
+    Raises:
+        errors.UnexpectedStatus: If the server returns an undocumented status code and Client.raise_on_unexpected_status is True.
+        httpx.TimeoutException: If the request takes longer than Client.timeout.
+
+    Returns:
+        Response[Any]
+     """
+
+    kwargs = _get_kwargs(
+        client=client,
+    )
+
+    response = httpx.request(
+        verify=client.verify_ssl,
+        **kwargs,
+    )
+
+    return _build_response(client=client, response=response)
+
+
+async def asyncio_detailed(
+    *,
+    client: Client,
+) -> Response[Any]:
+    r""" Test description with \
+
+     Test description with \
+
+    Raises:
+        errors.UnexpectedStatus: If the server returns an undocumented status code and Client.raise_on_unexpected_status is True.
+        httpx.TimeoutException: If the request takes longer than Client.timeout.
+
+    Returns:
+        Response[Any]
+     """
+
+    kwargs = _get_kwargs(
+        client=client,
+    )
+
+    async with httpx.AsyncClient(verify=client.verify_ssl) as _client:
+        response = await _client.request(**kwargs)
+
+    return _build_response(client=client, response=response)

end_to_end_tests/golden-record/my_test_api_client/models/__init__.py

@@ -47,6 +47,7 @@
 from .model_with_additional_properties_refed import ModelWithAdditionalPropertiesRefed
 from .model_with_any_json_properties import ModelWithAnyJsonProperties
 from .model_with_any_json_properties_additional_property_type_0 import ModelWithAnyJsonPropertiesAdditionalPropertyType0
+from .model_with_backslash_in_description import ModelWithBackslashInDescription
 from .model_with_circular_ref_a import ModelWithCircularRefA
 from .model_with_circular_ref_b import ModelWithCircularRefB
 from .model_with_circular_ref_in_additional_properties_a import ModelWithCircularRefInAdditionalPropertiesA
@@ -111,6 +112,7 @@
     "ModelWithAdditionalPropertiesRefed",
     "ModelWithAnyJsonProperties",
     "ModelWithAnyJsonPropertiesAdditionalPropertyType0",
+    "ModelWithBackslashInDescription",
     "ModelWithCircularRefA",
     "ModelWithCircularRefB",
     "ModelWithCircularRefInAdditionalPropertiesA",

end_to_end_tests/golden-record/my_test_api_client/models/model_with_backslash_in_description.py

@@ -0,0 +1,46 @@
+from typing import Any, Dict, List, Type, TypeVar
+
+import attr
+
+T = TypeVar("T", bound="ModelWithBackslashInDescription")
+
+
+@attr.s(auto_attribs=True)
+class ModelWithBackslashInDescription:
+    r""" Description with special character: \
+
+     """
+
+    additional_properties: Dict[str, Any] = attr.ib(init=False, factory=dict)
+
+    def to_dict(self) -> Dict[str, Any]:
+
+        field_dict: Dict[str, Any] = {}
+        field_dict.update(self.additional_properties)
+        field_dict.update({})
+
+        return field_dict
+
+    @classmethod
+    def from_dict(cls: Type[T], src_dict: Dict[str, Any]) -> T:
+        d = src_dict.copy()
+        model_with_backslash_in_description = cls()
+
+        model_with_backslash_in_description.additional_properties = d
+        return model_with_backslash_in_description
+
+    @property
+    def additional_keys(self) -> List[str]:
+        return list(self.additional_properties.keys())
+
+    def __getitem__(self, key: str) -> Any:
+        return self.additional_properties[key]
+
+    def __setitem__(self, key: str, value: Any) -> None:
+        self.additional_properties[key] = value
+
+    def __delitem__(self, key: str) -> None:
+        del self.additional_properties[key]
+
+    def __contains__(self, key: str) -> bool:
+        return key in self.additional_properties

end_to_end_tests/openapi.json

@@ -1229,6 +1229,21 @@
           }
         }
       }
+    },
+    "/tests/description-with-backslash": {
+      "get": {
+        "tags": [
+          "tests"
+        ],
+        "summary": "Test description with \\",
+        "description": "Test description with \\",
+        "operationId": "description_with_backslash",
+        "responses": {
+          "200": {
+            "description": "Successful response"
+          }
+        }
+      }
     }
   },
   "components": {
@@ -2223,6 +2238,10 @@
             "$ref": "#/components/schemas/AnArrayWithACircularRefInItemsObjectAdditionalPropertiesA"
           }
         }
+      },
+      "ModelWithBackslashInDescription": {
+        "type": "object",
+        "description": "Description with special character: \\"
       }
     },
     "parameters": {

openapi_python_client/templates/endpoint_macros.py.jinja

@@ -1,4 +1,5 @@
 {% from "property_templates/helpers.jinja" import guarded_statement %}
+{% from "helpers.jinja" import safe_docstring %}
 
 {% macro header_params(endpoint) %}
 {% if endpoint.header_parameters %}
@@ -140,8 +141,8 @@ json_body=json_body,
 {% endfor %}
 {% endmacro %}
 
-{% macro docstring(endpoint, return_string) %}
-"""{% if endpoint.summary %}{{ endpoint.summary | wordwrap(100)}}
+{% macro docstring_content(endpoint, return_string) %}
+{% if endpoint.summary %}{{ endpoint.summary | wordwrap(100)}}
 
 {% endif -%}
 {%- if endpoint.description %} {{ endpoint.description | wordwrap(100) }}
@@ -165,5 +166,8 @@ Raises:
 
 Returns:
     Response[{{ return_string }}]
-"""
+{% endmacro %}
+
+{% macro docstring(endpoint, return_string) %}
+{{ safe_docstring(docstring_content(endpoint, return_string)) }}
 {% endmacro %}

openapi_python_client/templates/helpers.jinja

@@ -0,0 +1,8 @@
+{% macro safe_docstring(content) %}
+{# This macro returns the provided content as a docstring, set to a raw string if it contains a backslash #}
+{% if '\\' in content -%}
+r""" {{ content }} """
+{%- else -%}
+""" {{ content }} """
+{%- endif -%}
+{% endmacro %}

openapi_python_client/templates/model.py.jinja

@@ -31,11 +31,12 @@ if TYPE_CHECKING:
 {% set class_name = model.class_info.name %}
 {% set module_name = model.class_info.module_name %}
 
+{% from "helpers.jinja" import safe_docstring %}
+
 T = TypeVar("T", bound="{{ class_name }}")
 
-@attr.s(auto_attribs=True)
-class {{ class_name }}:
-    """{% if model.title %}{{ model.title | wordwrap(116) }}
+{% macro class_docstring_content(model) %}
+    {% if model.title %}{{ model.title | wordwrap(116) }}
 
     {% endif -%}
     {%- if model.description %}{{ model.description | wordwrap(116) }}
@@ -55,7 +56,11 @@ class {{ class_name }}:
     {% for property in model.required_properties + model.optional_properties %}
         {{ property.to_docstring() | wordwrap(112) | indent(12) }}
     {% endfor %}{% endif %}
-    """
+{% endmacro %}
+
+@attr.s(auto_attribs=True)
+class {{ class_name }}:
+    {{ safe_docstring(class_docstring_content(model)) | indent(4) }}
 
     {% for property in model.required_properties + model.optional_properties %}
     {% if property.default is none and property.required %}

openapi_python_client/templates/package_init.py.jinja

@@ -1,4 +1,6 @@
-""" {{ package_description }} """
+{% from "helpers.jinja" import safe_docstring %}
+
+{{ safe_docstring(package_description) }}
 from .client import AuthenticatedClient, Client
 
 __all__ = (