checkstyle/src/main/CopyrightCheck.py - onap/cps - Gitiles

 #  ============LICENSE_START=======================================================
 #  Copyright (C) 2022 Nordix Foundation
 #  ================================================================================
 #  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.
 #
 #  SPDX-License-Identifier: Apache-2.0
 #  ============LICENSE_END=========================================================

 import subprocess
 import csv
 import re
 import datetime

 #constants
 import sys

 COMMITTERS_CONFIG_FILE = ''
 TEMPLATE_COPYRIGHT_FILE = ''
 IGNORE_FILE = ''
 if len(sys.argv) == 4:
     COMMITTERS_CONFIG_FILE = sys.argv[1]
     TEMPLATE_COPYRIGHT_FILE = sys.argv[2]
     IGNORE_FILE = sys.argv[3]

 BANNER = '=' * 120

 def main():
     print(BANNER + '\nCopyright Check Python Script:')
     PermissionsCheck()

     committerEmailExtension = GetCommitterEmailExtension()
     projectCommitters = ReadProjectCommittersConfigFile()

     CheckCommitterInConfigFile(committerEmailExtension, projectCommitters)

     alteredFiles = FindAlteredFiles()

     if alteredFiles:
         issueCounter = CheckCopyrightForFiles(alteredFiles, projectCommitters, committerEmailExtension)
     else:
         issueCounter = 0

     print(str(issueCounter) + ' issue(s) found after '+ str(len(alteredFiles)) + ' altered file(s) checked')
     print(BANNER)


 # Check that Script has access to command line functions to use git
 def PermissionsCheck():
    if 'permission denied' in subprocess.run('git', shell=True, stdout=subprocess.PIPE).stdout.decode('utf-8').lower():
        print('Error, I may not have the necessary permissions. Exiting...')
        print(BANNER)
        sys.exit()
    else:
        return

 # Returns List of Strings of file tracked by git which have been changed/added
 def FindAlteredFiles():
     ignoreFilePaths = GetIgnoredFiles()

     #Before Stage lower case d removes deleted files
     stream = subprocess.run('git diff --name-only --diff-filter=d', shell=True, stdout=subprocess.PIPE)
     fileNames = stream.stdout.decode('utf-8')
     #Staged
     stream = subprocess.run('git diff --name-only --cached --diff-filter=d', shell=True, stdout=subprocess.PIPE)
     fileNames += '\n' + stream.stdout.decode('utf-8')
     #New committed
     stream = subprocess.run('git diff --name-only HEAD^ HEAD --diff-filter=d', shell=True, stdout=subprocess.PIPE)
     fileNames += '\n' + stream.stdout.decode('utf-8')

     #String to list of strings
     alteredFiles = fileNames.split("\n")

     #Remove duplicates
     alteredFiles = list(dict.fromkeys(alteredFiles))

     #Remove blank string(s)
     alteredFiles = list(filter(None, alteredFiles))

     #Remove ignored-extensions
     alteredFiles = list(filter(lambda fileName: not re.match("|".join(ignoreFilePaths), fileName), alteredFiles))

     return alteredFiles

 # Get the email of the most recent committer
 def GetCommitterEmailExtension():
     email = subprocess.run('git show -s --format=\'%ce\'', shell=True, stdout=subprocess.PIPE).stdout.decode('utf-8').rstrip('\n')
     return email[email.index('@'):]

 # Read the config file with names of companies and respective email extensions
 def ReadProjectCommittersConfigFile():
     try:
         with open(COMMITTERS_CONFIG_FILE, 'r') as file:
             reader = csv.reader(file, delimiter=',')
             projectCommitters = {row[0]:row[1] for row in reader}
         projectCommitters.pop('email')  #Remove csv header
     except FileNotFoundError:
         print('Unable to open Project Committers Config File, have the command line arguments been set?')
         print(BANNER)
         sys.exit()
     return projectCommitters

 def CheckCommitterInConfigFile(committerEmailExtension, projectCommitters):
     if not committerEmailExtension in projectCommitters:
         print('Error, Committer email is not included in config file.')
         print('If your company is new to the project please make appropriate changes to project-committers-config.csv')
         print('for Copyright Check to work.')
         print('Exiting...')
         print(BANNER)
         sys.exit()
     else:
         return True

 # Read config file with list of files to ignore
 def GetIgnoredFiles():
     try:
         with open(IGNORE_FILE, 'r') as file:
             reader = csv.reader(file)
             ignoreFilePaths = [row[0] for row in reader]
         ignoreFilePaths.pop(0)  #Remove csv header
         ignoreFilePaths = [filePath.replace('*', '.*') for filePath in ignoreFilePaths]
     except FileNotFoundError:
         print('Unable to open File Ignore Config File, have the command line arguments been set?')
         print(BANNER)
         sys.exit()
     return ignoreFilePaths

 # Read the template copyright file
 def GetCopyrightTemplate():
     try:
         with open(TEMPLATE_COPYRIGHT_FILE, 'r') as file:
             copyrightTemplate = file.readlines()
     except FileNotFoundError:
         print('Unable to open Template Copyright File, have the command line arguments been set?')
         print(BANNER)
         sys.exit()
     return copyrightTemplate

 def GetProjectRootDir():
     return subprocess.run('git rev-parse --show-toplevel', shell=True, stdout=subprocess.PIPE).stdout.decode('utf-8').rstrip('\n') + '/'

 # Get the Copyright from the altered file
 def ParseFileCopyright(fileObject):
     global issueCounter
     copyrightFlag = False
     copyrightInFile = {}
     lineNumber = 1
     for line in fileObject:
         if 'LICENSE_START' in line:
             copyrightFlag = True
         if copyrightFlag:
             copyrightInFile[lineNumber] = line
         if 'LICENSE_END' in line:
             break
         lineNumber += 1

     if not copyrightFlag:
         print(fileObject.name + ' | no copyright found')
         return {}, {}

     copyrightSignatures = {}
     copyrightLineNumbers = list(copyrightInFile.keys())
     #Capture signature lines after LICENSE_START line
     for lineNumber in copyrightLineNumbers:
         if '=' not in copyrightInFile[lineNumber]:
             copyrightSignatures[lineNumber] = copyrightInFile[lineNumber]
             copyrightInFile.pop(lineNumber)
         elif 'LICENSE_START' not in copyrightInFile[lineNumber]:
             break

     return (copyrightInFile, copyrightSignatures)

 # Remove the Block comment syntax
 def RemoveCommentBlock(fileCopyright):
     # Comment Characters can very depending on file # *..
     endOfCommentsIndex = list(fileCopyright.values())[0].index('=')
     for key in fileCopyright:
         fileCopyright[key] = fileCopyright[key][endOfCommentsIndex:]
         if fileCopyright[key] == '':
             fileCopyright[key] = '\n'

     return fileCopyright

 def CheckCopyrightForFiles(alteredFiles, projectCommitters, committerEmailExtension):
     issueCounter = 0
     templateCopyright = GetCopyrightTemplate() #Get Copyright Template
     projectRootDir = GetProjectRootDir()

     for fileName in alteredFiles: # Not removed files
         try:
             with open(projectRootDir + fileName, 'r') as fileObject:
                 (fileCopyright, fileSignatures) = ParseFileCopyright(fileObject)

             #Empty dict evaluates to false
             if fileCopyright and fileSignatures:
                 fileCopyright = RemoveCommentBlock(fileCopyright)
                 issueCounter += CheckCopyrightFormat(fileCopyright, templateCopyright, projectRootDir + fileName)
                 committerCompany = projectCommitters[committerEmailExtension]
                 issueCounter += CheckCopyrightSignature(fileSignatures, committerCompany, projectRootDir + fileName)
             else:
                 issueCounter += 1

         except FileNotFoundError:
             issueCounter += 1
             print('Unable to find file ' + projectRootDir + fileName)
     return issueCounter

 # Check that the filecopyright matches the template copyright and print comparison
 def CheckCopyrightFormat(copyrightInFile, templateCopyright, filePath):
     issueCounter = 0
     errorWithComparison = ''
     for copyrightInFileKey, templateLine in zip(copyrightInFile, templateCopyright):
         if copyrightInFile[copyrightInFileKey] != templateLine:
             issueCounter += 1
             errorWithComparison += filePath + ' | line ' + '{:2}'.format(copyrightInFileKey) + ' read \t ' + repr(copyrightInFile[copyrightInFileKey]) + '\n'
             errorWithComparison += filePath + ' | line ' + '{:2}'.format(copyrightInFileKey) + ' expected ' + repr(templateLine) + '\n'
     if errorWithComparison != '':
         print(errorWithComparison.rstrip('\n'))
     return issueCounter

 # Check the signatures and compare with committer signature and current year
 def CheckCopyrightSignature(copyrightSignatures, committerCompany, filePath):
     issueCounter = 0
     errorWithSignature = ''
     signatureExists = False #signatureExistsForCommitter
     afterFirstLine = False #afterFirstCopyright
     for key in copyrightSignatures:
         if afterFirstLine and 'Modifications Copyright' not in copyrightSignatures[key]:
             issueCounter += 1
             errorWithSignature += filePath + ' | line ' + str(key) + ' expected Modifications Copyright\n'
         elif not afterFirstLine and 'Copyright' not in copyrightSignatures[key]:
             issueCounter += 1
             errorWithSignature += filePath + ' | line ' + str(key) + ' expected Copyright\n'
         if committerCompany in copyrightSignatures[key]:
             signatureExists = True
             signatureYear = int(re.findall(r'\d+', copyrightSignatures[key])[-1])
             currentYear = datetime.date.today().year
             if signatureYear != currentYear:
                 issueCounter += 1
                 errorWithSignature += filePath + ' | line ' + str(key) + ' update year to include ' + str(currentYear) + '\n'
         afterFirstLine = True

     if not signatureExists:
         issueCounter += 1
         errorWithSignature += filePath + ' | missing company name and year for ' + committerCompany

     if errorWithSignature != '':
         print(errorWithSignature.rstrip('\n'))

     return issueCounter

 if __name__ == '__main__':
     main()
	# ============LICENSE_START=======================================================
	# Copyright (C) 2022 Nordix Foundation
	# ================================================================================
	# 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.
	#
	# SPDX-License-Identifier: Apache-2.0
	# ============LICENSE_END=========================================================

	import subprocess
	import csv
	import re
	import datetime

	#constants
	import sys

	COMMITTERS_CONFIG_FILE = ''
	TEMPLATE_COPYRIGHT_FILE = ''
	IGNORE_FILE = ''
	if len(sys.argv) == 4:
	COMMITTERS_CONFIG_FILE = sys.argv[1]
	TEMPLATE_COPYRIGHT_FILE = sys.argv[2]
	IGNORE_FILE = sys.argv[3]

	BANNER = '=' * 120

	def main():
	print(BANNER + '\nCopyright Check Python Script:')
	PermissionsCheck()

	committerEmailExtension = GetCommitterEmailExtension()
	projectCommitters = ReadProjectCommittersConfigFile()

	CheckCommitterInConfigFile(committerEmailExtension, projectCommitters)

	alteredFiles = FindAlteredFiles()

	if alteredFiles:
	issueCounter = CheckCopyrightForFiles(alteredFiles, projectCommitters, committerEmailExtension)
	else:
	issueCounter = 0

	print(str(issueCounter) + ' issue(s) found after '+ str(len(alteredFiles)) + ' altered file(s) checked')
	print(BANNER)


	# Check that Script has access to command line functions to use git
	def PermissionsCheck():
	if 'permission denied' in subprocess.run('git', shell=True, stdout=subprocess.PIPE).stdout.decode('utf-8').lower():
	print('Error, I may not have the necessary permissions. Exiting...')
	print(BANNER)
	sys.exit()
	else:
	return

	# Returns List of Strings of file tracked by git which have been changed/added
	def FindAlteredFiles():
	ignoreFilePaths = GetIgnoredFiles()

	#Before Stage lower case d removes deleted files
	stream = subprocess.run('git diff --name-only --diff-filter=d', shell=True, stdout=subprocess.PIPE)
	fileNames = stream.stdout.decode('utf-8')
	#Staged
	stream = subprocess.run('git diff --name-only --cached --diff-filter=d', shell=True, stdout=subprocess.PIPE)
	fileNames += '\n' + stream.stdout.decode('utf-8')
	#New committed
	stream = subprocess.run('git diff --name-only HEAD^ HEAD --diff-filter=d', shell=True, stdout=subprocess.PIPE)
	fileNames += '\n' + stream.stdout.decode('utf-8')

	#String to list of strings
	alteredFiles = fileNames.split("\n")

	#Remove duplicates
	alteredFiles = list(dict.fromkeys(alteredFiles))

	#Remove blank string(s)
	alteredFiles = list(filter(None, alteredFiles))

	#Remove ignored-extensions
	alteredFiles = list(filter(lambda fileName: not re.match("\|".join(ignoreFilePaths), fileName), alteredFiles))

	return alteredFiles

	# Get the email of the most recent committer
	def GetCommitterEmailExtension():
	email = subprocess.run('git show -s --format=\'%ce\'', shell=True, stdout=subprocess.PIPE).stdout.decode('utf-8').rstrip('\n')
	return email[email.index('@'):]

	# Read the config file with names of companies and respective email extensions
	def ReadProjectCommittersConfigFile():
	try:
	with open(COMMITTERS_CONFIG_FILE, 'r') as file:
	reader = csv.reader(file, delimiter=',')
	projectCommitters = {row[0]:row[1] for row in reader}
	projectCommitters.pop('email') #Remove csv header
	except FileNotFoundError:
	print('Unable to open Project Committers Config File, have the command line arguments been set?')
	print(BANNER)
	sys.exit()
	return projectCommitters

	def CheckCommitterInConfigFile(committerEmailExtension, projectCommitters):
	if not committerEmailExtension in projectCommitters:
	print('Error, Committer email is not included in config file.')
	print('If your company is new to the project please make appropriate changes to project-committers-config.csv')
	print('for Copyright Check to work.')
	print('Exiting...')
	print(BANNER)
	sys.exit()
	else:
	return True

	# Read config file with list of files to ignore
	def GetIgnoredFiles():
	try:
	with open(IGNORE_FILE, 'r') as file:
	reader = csv.reader(file)
	ignoreFilePaths = [row[0] for row in reader]
	ignoreFilePaths.pop(0) #Remove csv header
	ignoreFilePaths = [filePath.replace('', '.') for filePath in ignoreFilePaths]
	except FileNotFoundError:
	print('Unable to open File Ignore Config File, have the command line arguments been set?')
	print(BANNER)
	sys.exit()
	return ignoreFilePaths

	# Read the template copyright file
	def GetCopyrightTemplate():
	try:
	with open(TEMPLATE_COPYRIGHT_FILE, 'r') as file:
	copyrightTemplate = file.readlines()
	except FileNotFoundError:
	print('Unable to open Template Copyright File, have the command line arguments been set?')
	print(BANNER)
	sys.exit()
	return copyrightTemplate

	def GetProjectRootDir():
	return subprocess.run('git rev-parse --show-toplevel', shell=True, stdout=subprocess.PIPE).stdout.decode('utf-8').rstrip('\n') + '/'

	# Get the Copyright from the altered file
	def ParseFileCopyright(fileObject):
	global issueCounter
	copyrightFlag = False
	copyrightInFile = {}
	lineNumber = 1
	for line in fileObject:
	if 'LICENSE_START' in line:
	copyrightFlag = True
	if copyrightFlag:
	copyrightInFile[lineNumber] = line
	if 'LICENSE_END' in line:
	break
	lineNumber += 1

	if not copyrightFlag:
	print(fileObject.name + ' \| no copyright found')
	return {}, {}

	copyrightSignatures = {}
	copyrightLineNumbers = list(copyrightInFile.keys())
	#Capture signature lines after LICENSE_START line
	for lineNumber in copyrightLineNumbers:
	if '=' not in copyrightInFile[lineNumber]:
	copyrightSignatures[lineNumber] = copyrightInFile[lineNumber]
	copyrightInFile.pop(lineNumber)
	elif 'LICENSE_START' not in copyrightInFile[lineNumber]:
	break

	return (copyrightInFile, copyrightSignatures)

	# Remove the Block comment syntax
	def RemoveCommentBlock(fileCopyright):
	# Comment Characters can very depending on file # *..
	endOfCommentsIndex = list(fileCopyright.values())[0].index('=')
	for key in fileCopyright:
	fileCopyright[key] = fileCopyright[key][endOfCommentsIndex:]
	if fileCopyright[key] == '':
	fileCopyright[key] = '\n'

	return fileCopyright

	def CheckCopyrightForFiles(alteredFiles, projectCommitters, committerEmailExtension):
	issueCounter = 0
	templateCopyright = GetCopyrightTemplate() #Get Copyright Template
	projectRootDir = GetProjectRootDir()

	for fileName in alteredFiles: # Not removed files
	try:
	with open(projectRootDir + fileName, 'r') as fileObject:
	(fileCopyright, fileSignatures) = ParseFileCopyright(fileObject)

	#Empty dict evaluates to false
	if fileCopyright and fileSignatures:
	fileCopyright = RemoveCommentBlock(fileCopyright)
	issueCounter += CheckCopyrightFormat(fileCopyright, templateCopyright, projectRootDir + fileName)
	committerCompany = projectCommitters[committerEmailExtension]
	issueCounter += CheckCopyrightSignature(fileSignatures, committerCompany, projectRootDir + fileName)
	else:
	issueCounter += 1

	except FileNotFoundError:
	issueCounter += 1
	print('Unable to find file ' + projectRootDir + fileName)
	return issueCounter

	# Check that the filecopyright matches the template copyright and print comparison
	def CheckCopyrightFormat(copyrightInFile, templateCopyright, filePath):
	issueCounter = 0
	errorWithComparison = ''
	for copyrightInFileKey, templateLine in zip(copyrightInFile, templateCopyright):
	if copyrightInFile[copyrightInFileKey] != templateLine:
	issueCounter += 1
	errorWithComparison += filePath + ' \| line ' + '{:2}'.format(copyrightInFileKey) + ' read \t ' + repr(copyrightInFile[copyrightInFileKey]) + '\n'
	errorWithComparison += filePath + ' \| line ' + '{:2}'.format(copyrightInFileKey) + ' expected ' + repr(templateLine) + '\n'
	if errorWithComparison != '':
	print(errorWithComparison.rstrip('\n'))
	return issueCounter

	# Check the signatures and compare with committer signature and current year
	def CheckCopyrightSignature(copyrightSignatures, committerCompany, filePath):
	issueCounter = 0
	errorWithSignature = ''
	signatureExists = False #signatureExistsForCommitter
	afterFirstLine = False #afterFirstCopyright
	for key in copyrightSignatures:
	if afterFirstLine and 'Modifications Copyright' not in copyrightSignatures[key]:
	issueCounter += 1
	errorWithSignature += filePath + ' \| line ' + str(key) + ' expected Modifications Copyright\n'
	elif not afterFirstLine and 'Copyright' not in copyrightSignatures[key]:
	issueCounter += 1
	errorWithSignature += filePath + ' \| line ' + str(key) + ' expected Copyright\n'
	if committerCompany in copyrightSignatures[key]:
	signatureExists = True
	signatureYear = int(re.findall(r'\d+', copyrightSignatures[key])[-1])
	currentYear = datetime.date.today().year
	if signatureYear != currentYear:
	issueCounter += 1
	errorWithSignature += filePath + ' \| line ' + str(key) + ' update year to include ' + str(currentYear) + '\n'
	afterFirstLine = True

	if not signatureExists:
	issueCounter += 1
	errorWithSignature += filePath + ' \| missing company name and year for ' + committerCompany

	if errorWithSignature != '':
	print(errorWithSignature.rstrip('\n'))

	return issueCounter

	if __name__ == '__main__':
	main()