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# Copyright 2016 Free Software Foundation, Inc.
# This file is part of GNU Radio
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
from __future__ import absolute_import
from codecs import open
import json
import logging
import os
import six
from . import block_tree, block
path = os.path
logger = logging.getLogger(__name__)
excludes = [
'qtgui_',
'.grc_gnuradio/',
'blks2',
'wxgui',
'epy_block.xml',
'virtual_sink.xml',
'virtual_source.xml',
'dummy.xml',
'variable_struct.xml', # todo: re-implement as class
'digital_constellation', # todo: fix template
]
class Converter(object):
def __init__(self, search_path, output_dir='~/.cache/grc_gnuradio'):
self.search_path = search_path
self.output_dir = os.path.expanduser(output_dir)
logger.info("Saving converted files to {}".format(self.output_dir))
self._force = False
converter_module_path = path.dirname(__file__)
self._converter_mtime = max(path.getmtime(path.join(converter_module_path, module))
for module in os.listdir(converter_module_path)
if not module.endswith('flow_graph.py'))
self.cache_file = os.path.join(self.output_dir, '_cache.json')
self.cache = {}
def run(self, force=False):
self._force = force
try:
logger.debug("Loading block cache from: {}".format(self.cache_file))
with open(self.cache_file, encoding='utf-8') as cache_file:
self.cache = byteify(json.load(cache_file))
except (IOError, ValueError):
self.cache = {}
self._force = True
need_cache_write = False
if not path.isdir(self.output_dir):
os.makedirs(self.output_dir)
if self._force:
for name in os.listdir(self.output_dir):
os.remove(os.path.join(self.output_dir, name))
for xml_file in self.iter_files_in_block_path():
if xml_file.endswith("block_tree.xml"):
changed = self.load_category_tree_xml(xml_file)
elif xml_file.endswith('domain.xml'):
continue
else:
changed = self.load_block_xml(xml_file)
if changed:
need_cache_write = True
if need_cache_write:
logger.debug('Saving %d entries to json cache', len(self.cache))
with open(self.cache_file, 'w', encoding='utf-8') as cache_file:
json.dump(self.cache, cache_file)
def load_block_xml(self, xml_file, force=False):
"""Load block description from xml file"""
if any(part in xml_file for part in excludes) and not force:
logger.warn('Skipping {} because name is blacklisted!'
.format(xml_file))
return False
elif any(part in xml_file for part in excludes) and force:
logger.warn('Forcing conversion of blacklisted file: {}'
.format(xml_file))
block_id_from_xml = path.basename(xml_file)[:-4]
yml_file = path.join(self.output_dir, block_id_from_xml + '.block.yml')
if not self.needs_conversion(xml_file, yml_file):
return # yml file up-to-date
logger.info('Converting block %s', path.basename(xml_file))
data = block.from_xml(xml_file)
if block_id_from_xml != data['id']:
logger.warning('block_id and filename differ')
self.cache[yml_file] = data
with open(yml_file, 'w', encoding='utf-8') as yml_file:
block.dump(data, yml_file)
return True
def load_category_tree_xml(self, xml_file):
"""Validate and parse category tree file and add it to list"""
module_name = path.basename(xml_file)[:-len('block_tree.xml')].rstrip('._-')
yml_file = path.join(self.output_dir, module_name + '.tree.yml')
if not self.needs_conversion(xml_file, yml_file):
return # yml file up-to-date
logger.info('Converting module %s', path.basename(xml_file))
data = block_tree.from_xml(xml_file)
self.cache[yml_file] = data
with open(yml_file, 'w', encoding='utf-8') as yml_file:
block_tree.dump(data, yml_file)
return True
def needs_conversion(self, source, destination):
"""Check if source has already been converted and destination is up-to-date"""
if self._force or not path.exists(destination):
return True
xml_time = path.getmtime(source)
yml_time = path.getmtime(destination)
return yml_time < xml_time or yml_time < self._converter_mtime
def iter_files_in_block_path(self, suffix='.xml'):
"""Iterator for block descriptions and category trees"""
for block_path in self.search_path:
if path.isfile(block_path):
yield block_path
elif path.isdir(block_path):
for root, _, files in os.walk(block_path, followlinks=True):
for name in files:
if name.endswith(suffix):
yield path.join(root, name)
else:
logger.warning('Invalid entry in search path: {}'.format(block_path))
def byteify(data):
if isinstance(data, dict):
return {byteify(key): byteify(value) for key, value in six.iteritems(data)}
elif isinstance(data, list):
return [byteify(element) for element in data]
elif isinstance(data, six.text_type) and six.PY2:
return data.encode('utf-8')
else:
return data
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