Checking OS to replace wc and grep to findstr, their equivalent command on Windows.

gitstats

 	Get number of files changed in commit
 	"""
 	time, rev = time_rev
-	return (int(time), rev, int(getpipeoutput(['git ls-tree -r --name-only "%s"' % rev, 'wc -l']).split('\n')[0]))
+	return (int(time), rev, int(getpipeoutput(['git ls-tree -r --name-only "%s"' % rev, ('find /c /v ""', 'wc -l')[ON_LINUX]]).split('\n')[0]))
 
 def getnumoflinesinblob(ext_blob):
 	"""
 	Get number of lines in blob
 	"""
 	ext, blob_id = ext_blob
-	return (ext, blob_id, int(getpipeoutput(['git cat-file blob %s' % blob_id, 'wc -l']).split()[0]))
+	return (ext, blob_id, int(getpipeoutput(['git cat-file blob %s' % blob_id, ('find /c /v ""', 'wc -l')[ON_LINUX]]).split()[0]))
 
 class DataCollector:
 	"""Manages data collection from a revision control repository."""
 	def collect(self, dir):
 		DataCollector.collect(self, dir)
 
-		self.total_authors += int(getpipeoutput(['git shortlog -s %s' % getlogrange(), 'wc -l']))
-		#self.total_lines = int(getoutput('git-ls-files -z |xargs -0 cat |wc -l'))
+		self.total_authors += int(getpipeoutput(['git shortlog -s %s' % getlogrange(), ('find /c /v ""', 'wc -l')[ON_LINUX]]))
+		#self.total_lines = int(getoutput('git-ls-files -z |xargs -0 cat |find /c /v ""'))
 
-		# tags
+		# tags		
 		lines = getpipeoutput(['git show-ref --tags']).split('\n')
 		for line in lines:
 			if len(line) == 0:
 
 		# Collect revision statistics
 		# Outputs "<stamp> <date> <time> <timezone> <author> '<' <mail> '>'"
-		lines = getpipeoutput(['git rev-list --pretty=format:"%%at %%ai %%aN <%%aE>" %s' % getlogrange('HEAD'), 'grep -v ^commit']).split('\n')
+		lines = getpipeoutput(['git rev-list --pretty=format:"%%at %%ai %%aN <%%aE>" %s' % getlogrange('HEAD'), ('findstr /v ', 'grep -v ')[ON_LINUX] + '^commit']).split('\n')
 		for line in lines:
 			parts = line.split(' ', 4)
 			author = ''
 			self.commits_by_timezone[timezone] = self.commits_by_timezone.get(timezone, 0) + 1
 
 		# outputs "<stamp> <files>" for each revision
-		revlines = getpipeoutput(['git rev-list --pretty=format:"%%at %%T" %s' % getlogrange('HEAD'), 'grep -v ^commit']).strip().split('\n')
+		revlines = getpipeoutput(['git rev-list --pretty=format:"%%at %%T" %s' % getlogrange('HEAD'), ('findstr /v ',  'grep -v ')[ON_LINUX] + '^commit']).strip().split('\n')
 		lines = []
 		revs_to_read = []
 		time_rev_count = []