Converts multimarkdown meta block (pelican) to nikola's; also moves "draft" status and summary

pelican_nikola_metablocks.py

# Converts multimarkdown meta block (pelican) to rst (nikola); also moves "draft" status and summary
# 

import os, sys, codecs

# recursive, paths from working dir
FROM_PATH = ""
OUTPUT_PATH = None #if none, replace file
SUMMARY_TO_DESCRIPTION = True # Put summary key (pelican) to description key (nikola)

def file_open_save(path, mode, text=False):
	if sys.version_info[0] == 3:
		if not mode == 'w':
			return open(path, mode, encoding='utf-8')
		else:
			try:
				# make dirs in path tree from path + filename
				os.makedirs(os.path.dirname(path))
			except OSError:
				pass
			with open(path, mode, encoding='utf-8') as outputFile:
				outputFile.write(text)
	else:
		if not mode == 'w':
			return codecs.open(path, mode, encoding='utf-8')
		else:
			try:
				# make dirs in path tree from path + filename
				os.makedirs(os.path.dirname(path))
			except OSError:
				pass
			with codecs.open(path, mode, encoding='utf-8') as outputFile:
				outputFile.write(text)


if not os.path.exists(FROM_PATH) and not os.path.isdir(FROM_PATH):
	print (" Something wrong")
	sys.exit(0)

if OUTPUT_PATH and (not os.path.exists(OUTPUT_PATH) or not os.path.isdir(OUTPUT_PATH)):
	print (" Output path must be an existing folder")
	sys.exit(0)

print (" Starting..")

# full paths 
FROM_PATH = os.path.abspath(FROM_PATH)
if OUTPUT_PATH:
	OUTPUT_PATH = os.path.abspath(OUTPUT_PATH)

# get filepaths
files_list = list()
for root, subFolders, files in os.walk(FROM_PATH):
	for filename in files:
		filePath = os.path.join(root, filename)

		if os.path.exists(filePath):
			files_list.append(filePath)

if len(files_list) == 0:
	print (" No files found")
	sys.exit(0)	


# open, replacing. save
for this_file in files_list:
	print ("  Processing: " + os.path.relpath(this_file, FROM_PATH))

	new_meta = list()

	with file_open_save(this_file, 'r') as the_text:
		#clean lines also
		input_text = [x.rstrip() for x in the_text.readlines()]

	draft_found = False

	for l_number, line in enumerate(input_text):
		if line and not line.isspace():
			#just in case, lets lowercase the meta key
			meta_key, rest = line.split(":", 1)
			meta_key = meta_key.lower()

			meta_line = ".. " + meta_key + ":" + rest

			if meta_key == "status":
				draft_found = meta_line
			if meta_key == "summary" and SUMMARY_TO_DESCRIPTION:
				meta_line = ".. description:" + rest

			new_meta.append(meta_line)

		else:
			# meta ended, find draft key (pelican) and put it in tags (nikola)
						
			if draft_found:
				new_meta.remove(draft_found)

				i = 0
				while (i <= len(new_meta)):
					if new_meta[i].startswith(".. tags:"):
						new_meta[i] = new_meta[i]  + ", draft"
						break 
					i += 1

			new_file = new_meta + input_text[l_number:]
			new_file = "\n".join(new_file)
			break

	#save
	new_path = this_file
	if OUTPUT_PATH:
		new_path = os.path.join(OUTPUT_PATH, os.path.relpath(this_file, FROM_PATH))

	file_open_save(new_path, 'w', new_file)

print (" Finished.")