generate_package.py: Replace touch

This replaces the user-defined touch
function with library function Path.

Closes #2575

bears/generate_package.py

@@ -2,6 +2,7 @@
 import glob
 import os
 import shutil
+from pathlib import Path
 from string import Template
 import subprocess
 import sys
@@ -13,15 +14,6 @@
 from coalib.parsing.Globbing import glob
 
 
-def touch(file_name):
-    """
-    Creates an empty file. An existing file remains untouched.
-
-    :param file_name: Name of the file.
-    """
-    open(file_name, 'a').close()
-
-
 def create_file_from_template(template_file, output_file, substitution_dict):
     """
     Creates a file from a template file, using a substitution dict.
@@ -55,7 +47,7 @@ def create_file_structure_for_packages(root_folder, file_to_copy, object_name):
     upload_package_folder = os.path.join(
         root_folder, object_name, 'coala' + object_name)
     os.makedirs(upload_package_folder, exist_ok=True)
-    touch(os.path.join(upload_package_folder, '__init__.py'))
+    Path(os.path.join(upload_package_folder, '__init__.py')).touch()
     shutil.copyfile(file_to_copy, os.path.join(upload_package_folder,
                                                object_name + '.py'))
 

tests/generate_packageTest.py

@@ -2,8 +2,10 @@
 import shutil
 import sys
 import unittest
+from pathlib import Path
 from unittest.mock import patch
-from bears.generate_package import (VERSION, touch, create_file_from_template,
+
+from bears.generate_package import (VERSION, create_file_from_template,
                                     create_file_structure_for_packages,
                                     perform_register, perform_upload, main,
                                     create_upload_parser)
@@ -17,7 +19,7 @@ def setUp(self):
 
     def test_file_doesnt_exist(self):
         self.assertFalse(os.path.exists('TestFile.py'))
-        touch('TestFile.py')
+        Path('TestFile.py').touch()
         self.assertTrue(os.path.exists('TestFile.py'))
 
     def tearDown(self):
@@ -52,7 +54,7 @@ class CreateFileStructureForPackagesTest(unittest.TestCase):
     BEAR_FILE_PATH = os.path.join('folder', 'Test', 'coalaTest', 'Test.py')
 
     def test_structure(self):
-        touch('TestFile.py')
+        Path('TestFile.py').touch()
         create_file_structure_for_packages('folder', 'TestFile.py', 'Test')
         self.assertTrue(os.path.exists(self.INIT_FILE_PATH))
         self.assertTrue(os.path.exists(self.BEAR_FILE_PATH))
@@ -147,7 +149,7 @@ def test_register(self, call_mock):
     def test_no_bear_object(self):
         if not os.path.exists(self.NO_BEAR_PATH):
             os.makedirs(os.path.join(self.BEARS_PATH, 'BadBear'))
-            touch(self.NO_BEAR_PATH)
+            Path(self.NO_BEAR_PATH).touch()
         main()
         self.assertFalse(os.path.exists(os.path.join(
             self.BEARS_UPLOAD_PATH, 'BadBear')))