fix: compatibility for black on Android termux system that does not support multiprocessing

docs/CHANGELOG.md

@@ -1,10 +1,11 @@
 # Release History
 
-## 3.1.2 (2020-06-23)
+## 3.1.2 (2020-06-28)
 
 **Fixed**
 
 - fix: missing setup/teardown hooks for referenced testcase
+- fix: compatibility for `black` on Android termux that does not support multiprocessing well
 
 ## 3.1.1 (2020-06-23)
 

httprunner/make.py

@@ -24,7 +24,7 @@ from httprunner.loader import (
     convert_relative_project_root_dir,
 )
 from httprunner.response import uniform_validator
-from httprunner.utils import override_config_variables
+from httprunner.utils import override_config_variables, is_support_multiprocessing
 
 """ cache converted pytest files, avoid duplicate making
 """
@@ -160,7 +160,13 @@ def convert_testcase_path(testcase_abs_path: Text) -> Tuple[Text, Text]:
 def format_pytest_with_black(*python_paths: Text) -> NoReturn:
     logger.info("format pytest cases with black ...")
     try:
-        subprocess.run(["black", *python_paths])
+        if is_support_multiprocessing() or len(python_paths) <= 1:
+            subprocess.run(["black", *python_paths])
+        else:
+            logger.warning(
+                f"this system does not support multiprocessing well, format files one by one ..."
+            )
+            [subprocess.run(["black", path]) for path in python_paths]
     except subprocess.CalledProcessError as ex:
         capture_exception(ex)
         logger.error(ex)

httprunner/utils.py

@@ -4,13 +4,15 @@ import json
 import os.path
 import platform
 import uuid
+from multiprocessing import Queue
 from typing import Dict, List, Any
 
 import sentry_sdk
+from loguru import logger
+
 from httprunner import __version__
 from httprunner import exceptions
 from httprunner.models import VariablesMapping
-from loguru import logger
 
 
 def init_sentry_sdk():
@@ -209,3 +211,12 @@ def override_config_variables(
     variables = copy.deepcopy(config_variables)
     variables.update(step_new_variables)
     return variables
+
+
+def is_support_multiprocessing() -> bool:
+    try:
+        Queue()
+        return True
+    except (ImportError, OSError):
+        # system that does not support semaphores(dependency of multiprocessing), like Android termux
+        return False