Use raise from in modules (#11097)

* Use raise from.

* Add changelog fragment.

* Add comment.

changelogs/fragments/11097-raise-from.yml

@@ -0,0 +1,21 @@
+minor_changes:
+  - cmd_runner module utils - use ``raise ... from ...`` when passing on exceptions (https://github.com/ansible-collections/community.general/pull/11097).
+  - csv module utils - use ``raise ... from ...`` when passing on exceptions (https://github.com/ansible-collections/community.general/pull/11097).
+  - database module utils - use ``raise ... from ...`` when passing on exceptions (https://github.com/ansible-collections/community.general/pull/11097).
+  - hwc_utils module utils - use ``raise ... from ...`` when passing on exceptions (https://github.com/ansible-collections/community.general/pull/11097).
+  - identity.keycloak.keycloak module utils - use ``raise ... from ...`` when passing on exceptions (https://github.com/ansible-collections/community.general/pull/11097).
+  - ipa module utils - use ``raise ... from ...`` when passing on exceptions (https://github.com/ansible-collections/community.general/pull/11097).
+  - lxd module utils - use ``raise ... from ...`` when passing on exceptions (https://github.com/ansible-collections/community.general/pull/11097).
+  - net_tools.pritunl.api module utils - use ``raise ... from ...`` when passing on exceptions (https://github.com/ansible-collections/community.general/pull/11097).
+  - cronvar - use ``raise ... from ...`` when passing on exceptions (https://github.com/ansible-collections/community.general/pull/11097).
+  - jenkins_plugin - use ``raise ... from ...`` when passing on exceptions (https://github.com/ansible-collections/community.general/pull/11097).
+  - jira - use ``raise ... from ...`` when passing on exceptions (https://github.com/ansible-collections/community.general/pull/11097).
+  - layman - use ``raise ... from ...`` when passing on exceptions (https://github.com/ansible-collections/community.general/pull/11097).
+  - listen_ports_facts - use ``raise ... from ...`` when passing on exceptions (https://github.com/ansible-collections/community.general/pull/11097).
+  - osx_defaults - use ``raise ... from ...`` when passing on exceptions (https://github.com/ansible-collections/community.general/pull/11097).
+  - packet_ip_subnet - use ``raise ... from ...`` when passing on exceptions (https://github.com/ansible-collections/community.general/pull/11097).
+  - packet_sshkey - use ``raise ... from ...`` when passing on exceptions (https://github.com/ansible-collections/community.general/pull/11097).
+  - pids - use ``raise ... from ...`` when passing on exceptions (https://github.com/ansible-collections/community.general/pull/11097).
+  - rhevm - use ``raise ... from ...`` when passing on exceptions (https://github.com/ansible-collections/community.general/pull/11097).
+  - vertica_schema - use ``raise ... from ...`` when passing on exceptions (https://github.com/ansible-collections/community.general/pull/11097).
+  - vertica_user - use ``raise ... from ...`` when passing on exceptions (https://github.com/ansible-collections/community.general/pull/11097).

plugins/module_utils/cmd_runner.py

@@ -194,7 +194,7 @@ class _CmdRunnerContext:
             except MissingArgumentValue:
                 raise
             except Exception as e:
-                raise FormatError(arg_name, value, runner.arg_formats[arg_name], e)
+                raise FormatError(arg_name, value, runner.arg_formats[arg_name], e) from e
 
         if self.check_mode_skip and module.check_mode:
             return self.check_mode_return

plugins/module_utils/csv.py

@@ -45,7 +45,7 @@ def initialize_dialect(dialect, **kwargs):
         try:
             csv.register_dialect("custom", dialect, **dialect_params)
         except TypeError as e:
-            raise CustomDialectFailureError(f"Unable to create custom dialect: {e}")
+            raise CustomDialectFailureError(f"Unable to create custom dialect: {e}") from e
         dialect = "custom"
 
     return dialect

plugins/module_utils/database.py

@@ -56,8 +56,8 @@ def _find_end_quote(identifier, quote_char):
     while True:
         try:
             quote = identifier.index(quote_char)
-        except ValueError:
-            raise UnclosedQuoteError
+        except ValueError as e:
+            raise UnclosedQuoteError from e
         accumulate = accumulate + quote
         try:
             next_char = identifier[quote + 1]
@@ -67,8 +67,8 @@ def _find_end_quote(identifier, quote_char):
             try:
                 identifier = identifier[quote + 2 :]
                 accumulate = accumulate + 2
-            except IndexError:
-                raise UnclosedQuoteError
+            except IndexError as e:
+                raise UnclosedQuoteError from e
         else:
             return accumulate
 

plugins/module_utils/hwc_utils.py

@@ -59,14 +59,14 @@ def session_method_wrapper(f):
             url = self.endpoint + url
             r = f(self, url, *args, **kwargs)
         except Exception as ex:
-            raise HwcClientException(0, f"Sending request failed, error={ex}")
+            raise HwcClientException(0, f"Sending request failed, error={ex}") from ex
 
         result = None
         if r.content:
             try:
                 result = r.json()
             except Exception as ex:
-                raise HwcClientException(0, f"Parsing response to json failed, error: {ex}")
+                raise HwcClientException(0, f"Parsing response to json failed, error: {ex}") from ex
 
         code = r.status_code
         if code not in [200, 201, 202, 203, 204, 205, 206, 207, 208, 226]:
@@ -184,7 +184,7 @@ class Config:
         try:
             url = client.get_endpoint(service_type=service_type, region_name=region, interface="public")
         except Exception as ex:
-            raise HwcClientException(0, f"Getting endpoint failed, error={ex}")
+            raise HwcClientException(0, f"Getting endpoint failed, error={ex}") from ex
 
         if url == "":
             raise HwcClientException(0, f"Cannot find the endpoint for {service_type}")

plugins/module_utils/identity/keycloak/keycloak.py

@@ -214,11 +214,11 @@ def _token_request(module_params, payload):
 
         return r["access_token"]
     except ValueError as e:
-        raise KeycloakError(f"API returned invalid JSON when trying to obtain access token from {auth_url}: {e}")
-    except KeyError:
-        raise KeycloakError(f"API did not include access_token field in response from {auth_url}")
+        raise KeycloakError(f"API returned invalid JSON when trying to obtain access token from {auth_url}: {e}") from e
+    except KeyError as e:
+        raise KeycloakError(f"API did not include access_token field in response from {auth_url}") from e
     except Exception as e:
-        raise KeycloakError(f"Could not obtain access token from {auth_url}: {e}", authError=e)
+        raise KeycloakError(f"Could not obtain access token from {auth_url}: {e}", authError=e) from e
 
 
 def _request_token_using_credentials(module_params):

plugins/module_utils/ipa.py

@@ -37,7 +37,7 @@ def _env_then_dns_fallback(*args, **kwargs):
         try:
             return socket.gethostbyaddr(socket.gethostbyname("ipa-ca"))[0]
         except Exception:
-            raise AnsibleFallbackNotFound
+            raise AnsibleFallbackNotFound from None  # no need to pass the original exception's context since this is basically a special return value
 
 
 class IPAClient:

plugins/module_utils/lxd.py

@@ -116,7 +116,7 @@ class LXDClient:
                 self._raise_err_from_json(resp_json)
             return resp_json
         except socket.error as e:
-            raise LXDClientException("cannot connect to the LXD server", err=e)
+            raise LXDClientException("cannot connect to the LXD server", err=e) from e
 
     def _raise_err_from_json(self, resp_json):
         err_params = {}

plugins/module_utils/net_tools/pritunl/api.py

@@ -322,4 +322,4 @@ def pritunl_auth_request(
             validate_certs=validate_certs,
         )
     except Exception as e:
-        raise PritunlException(e)
+        raise PritunlException(e) from e

plugins/modules/cronvar.py

@@ -161,8 +161,8 @@ class CronVar:
             except IOError:
                 # cron file does not exist
                 return
-            except Exception:
-                raise CronVarError("Unexpected error:", sys.exc_info()[0])
+            except Exception as e:
+                raise CronVarError("Unexpected error:", sys.exc_info()[0]) from e
         else:
             # using safely quoted shell for now, but this really should be two non-shell calls instead.  FIXME
             (rc, out, err) = self.module.run_command(self._read_user_execute(), use_unsafe_shell=True)
@@ -218,8 +218,8 @@ class CronVar:
         except OSError:
             # cron file does not exist
             return False
-        except Exception:
-            raise CronVarError("Unexpected error:", sys.exc_info()[0])
+        except Exception as e:
+            raise CronVarError("Unexpected error:", sys.exc_info()[0]) from e
 
     def parse_for_var(self, line):
         lexer = shlex.shlex(line)

plugins/modules/jenkins_plugin.py

@@ -475,7 +475,7 @@ class JenkinsPlugin:
                     self.module.fail_json(msg=msg_status, details=info["msg"])
         except Exception as e:
             if dont_fail:
-                raise FailedInstallingWithPluginManager(e)
+                raise FailedInstallingWithPluginManager(e) from e
             else:
                 self.module.fail_json(msg=msg_exception, details=to_native(e))
 

plugins/modules/jira.py

@@ -775,7 +775,7 @@ class JIRA(StateModuleHelper):
             try:
                 content = base64.b64decode(content)
             except binascii.Error as e:
-                raise Exception(f"Unable to base64 decode file content: {e}")
+                raise Exception(f"Unable to base64 decode file content: {e}") from e
 
         lines = [
             f"--{boundary}",

plugins/modules/layman.py

@@ -136,7 +136,7 @@ def download_url(module, url, dest):
         with open(dest, "w") as f:
             shutil.copyfileobj(response, f)
     except IOError as e:
-        raise ModuleError(f"Failed to write: {e}")
+        raise ModuleError(f"Failed to write: {e}") from e
 
 
 def install_overlay(module, name, list_url=None):

plugins/modules/listen_ports_facts.py

@@ -296,12 +296,12 @@ def ss_parse(raw):
                 protocol, state, recv_q, send_q, local_addr_port, peer_addr_port = cells
             else:
                 protocol, state, recv_q, send_q, local_addr_port, peer_addr_port, process = cells
-        except ValueError:
+        except ValueError as e:
             # unexpected stdout from ss
             raise EnvironmentError(
                 'Expected `ss` table layout "Netid, State, Recv-Q, Send-Q, Local Address:Port, Peer Address:Port" and'
                 f'optionally "Process", but got something else: {line}'
-            )
+            ) from e
 
         conns = regex_conns.search(local_addr_port)
         pids = regex_pid.findall(process)

plugins/modules/osx_defaults.py

@@ -210,8 +210,8 @@ class OSXDefaults:
         elif data_type == "date":
             try:
                 return datetime.strptime(value.split("+")[0].strip(), "%Y-%m-%d %H:%M:%S")
-            except ValueError:
-                raise OSXDefaultsException(f"Invalid date value: {value!r}. Required format yyy-mm-dd hh:mm:ss.")
+            except ValueError as e:
+                raise OSXDefaultsException(f"Invalid date value: {value!r}. Required format yyy-mm-dd hh:mm:ss.") from e
         elif data_type in ["int", "integer"]:
             if not OSXDefaults.is_int(value):
                 raise OSXDefaultsException(f"Invalid integer value: {value!r}")
@@ -219,8 +219,8 @@ class OSXDefaults:
         elif data_type == "float":
             try:
                 value = float(value)
-            except ValueError:
-                raise OSXDefaultsException(f"Invalid float value: {value!r}")
+            except ValueError as e:
+                raise OSXDefaultsException(f"Invalid float value: {value!r}") from e
             return value
         elif data_type == "array":
             if not isinstance(value, list):

plugins/modules/packet_ip_subnet.py

@@ -212,8 +212,8 @@ def parse_subnet_cidr(cidr):
     addr, prefixlen = cidr.split("/")
     try:
         prefixlen = int(prefixlen)
-    except ValueError:
-        raise Exception(f"Wrong prefix length in CIDR expression {cidr}")
+    except ValueError as e:
+        raise Exception(f"Wrong prefix length in CIDR expression {cidr}") from e
     return addr, prefixlen
 
 

plugins/modules/packet_sshkey.py

@@ -210,7 +210,7 @@ def act_on_sshkeys(target_state, module, packet_conn):
                 changed = True
             except Exception as e:
                 _msg = f"while trying to remove sshkey {k.label}, id {k.id} {target_state}, got error: {e}"
-                raise Exception(_msg)
+                raise Exception(_msg) from e
 
     return {"changed": changed, "sshkeys": [serialize_sshkey(k) for k in matching_sshkeys]}
 

plugins/modules/pids.py

@@ -126,7 +126,7 @@ class PSAdapter(metaclass=abc.ABCMeta):
         try:
             regex = re.compile(pattern, flags)
         except re.error as e:
-            raise PSAdapterError(f"'{pattern}' is not a valid regular expression: {e}")
+            raise PSAdapterError(f"'{pattern}' is not a valid regular expression: {e}") from e
 
         return [p.pid for p in self._process_iter(*self.PATTERN_ATTRS) if self._matches_regex(p, regex)]
 

plugins/modules/rhevm.py

@@ -371,8 +371,8 @@ class RHEVConn:
             api = API(url=url, username=user, password=password, insecure=str(insecure_api))
             api.test()
             self.conn = api
-        except Exception:
-            raise Exception("Failed to connect to RHEV-M.")
+        except Exception as e:
+            raise Exception("Failed to connect to RHEV-M.") from e
 
     def __del__(self):
         self.conn.disconnect()

plugins/modules/vertica_schema.py

@@ -242,8 +242,8 @@ def absent(schema_facts, cursor, schema, usage_roles, create_roles):
         )
         try:
             cursor.execute(f"drop schema {schema_facts[schema_key]['name']} restrict")
-        except pyodbc.Error:
-            raise CannotDropError("Dropping schema failed due to dependencies.")
+        except pyodbc.Error as e:
+            raise CannotDropError("Dropping schema failed due to dependencies.") from e
         del schema_facts[schema_key]
         return True
     else:

plugins/modules/vertica_user.py

@@ -282,8 +282,8 @@ def absent(user_facts, cursor, user, roles):
         update_roles(user_facts, cursor, user, user_facts[user_key]["roles"], user_facts[user_key]["default_roles"], [])
         try:
             cursor.execute(f"drop user {user_facts[user_key]['name']}")
-        except pyodbc.Error:
-            raise CannotDropError("Dropping user failed due to dependencies.")
+        except pyodbc.Error as e:
+            raise CannotDropError("Dropping user failed due to dependencies.") from e
         del user_facts[user_key]
         return True
     else: