dev_scripts: add copyright_updater

Add copyright_updater script which checks Python files to ensure their
copyright is up to date with its last modification.

dev_scripts/README

@@ -12,6 +12,8 @@ Scripts
 
 :clear_env: Clears ~/.workload_automation.
 
+:copyright_updater: Checks and updates the year of the copyright in Python files.
+
 :get_apk_versions: Prints out a table of APKs and their versons found under the
                    path specified as the argument.
 

dev_scripts/copyright_updater

@@ -0,0 +1,66 @@
+#    Copyright 2018 Arm Limited
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import argparse, os, re, datetime, subprocess, logging
+
+def Update(file_name, file_contents, year_copyright, year_last_modified, match):
+    x = file_contents.find(year_copyright)
+    if match.group(1):
+        modified = file_contents[0:x]+str(year_last_modified)+file_contents[x+4:]
+    else:
+        modified = file_contents[0:x+4]+'-'+str(year_last_modified)+file_contents[x+4:]
+    with open(file_name, 'w') as file:
+        file.write(modified)
+
+def File_Check(file_name):
+    _, ext = os.path.splitext(file_name)
+    if ext == '.py':
+        file = open(file_name, 'r')
+        file_contents = file.read()
+        file.close()
+        match = date_regex.search(file_contents)
+        if match:
+            year_copyright = match.group('year')
+            year_last_modified = Get_git_year(file_name)
+            if int(year_last_modified) > int(year_copyright):
+                logging.debug('Updated Arm copyright in: %s', file_name)
+                Update(file_name, file_contents, year_copyright, year_last_modified, match)
+            else:
+                logging.debug('Found Arm copyright in: %s', file_name)
+        elif 'Copyright' not in file_contents:
+            logging.warning('No copyright found in: %s', file_name)
+
+def Get_git_year(full_directory):
+    info = subprocess.check_output('git log -n 1 '+(os.path.basename(full_directory)),
+                                   shell = True, cwd = os.path.dirname(full_directory))
+    info_split_lines = info.split('\n')
+    info_split_words = info_split_lines[2].split()
+    return info_split_words[5]
+
+parser = argparse.ArgumentParser(description='Updates the year of the Copyright of Arm Limited python files')
+parser.add_argument('directory', metavar='DIR', type=str, help='Enter a file or directory for copyright updating')
+parser.add_argument('-v', '--verbose', action='store_true', help='Enable verbose output')
+
+args = parser.parse_args()
+date_regex = re.compile(r'Copyright (\d+-)?(?P<year>\d+) A(rm|RM) Limited')
+
+log_level = logging.DEBUG if args.verbose else logging.INFO
+logging.basicConfig(format='%(message)s', level=log_level)
+
+if os.path.isfile(args.directory):
+    File_Check(args.directory)
+else:
+    for folder, _, files in os.walk(args.directory):
+        for file_name in files:
+            File_Check(os.path.join(folder, file_name))