222 lines
7.6 KiB
Python
Executable File
222 lines
7.6 KiB
Python
Executable File
#!/usr/bin/env python
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import argparse
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import collections
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import datetime
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import os
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import re
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import shutil
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import six
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import sys
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import yaml
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def parse_opts(argv):
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parser = argparse.ArgumentParser(
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description='Convert to new NIC config templates with '
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'OS::Heat::Value resources.')
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parser.add_argument('-t', '--template', metavar='TEMPLATE_FILE',
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help=("Existing NIC config template to conver."),
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required=True)
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parser.add_argument('--discard-comments', metavar='DISCARD_COMMENTS',
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help="Discard comments from the template. (The "
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"scripts functions to keep YAML file comments in "
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"place, does not work in all scenarios.)",
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default=False)
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opts = parser.parse_args(argv[1:])
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return opts
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def to_commented_yaml(filename):
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"""Convert comments into 'comments<num>: ...' YAML"""
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out_str = ''
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last_non_comment_spaces = ''
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with open(filename, 'r') as f:
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comment_count = 0
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for line in f:
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# skip blank line
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if line.isspace():
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continue
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char_count = 0
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spaces = ''
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for char in line:
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char_count += 1
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if char == ' ':
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spaces += ' '
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next
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elif char == '#':
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comment_count += 1
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comment = line[char_count:-1]
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last_non_comment_spaces = spaces
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out_str += "%scomment%i_%i: '%s'\n" % (
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last_non_comment_spaces, comment_count, len(spaces),
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comment)
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break
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else:
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last_non_comment_spaces = spaces
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out_str += line
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# inline comments check
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m = re.match(".*:.*#(.*)", line)
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if m:
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comment_count += 1
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out_str += "%s inline_comment%i: '%s'\n" % (
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last_non_comment_spaces, comment_count, m.group(1))
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break
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with open(filename, 'w') as f:
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f.write(out_str)
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return out_str
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def to_normal_yaml(filename):
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"""Convert back to normal #commented YAML"""
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with open(filename, 'r') as f:
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data = f.read()
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out_str = ''
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next_line_break = False
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for line in data.split('\n'):
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# get_input not supported by run-os-net-config.sh script
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line = line.replace('get_input: ', '')
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# Normal comments
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m = re.match(" +comment[0-9]+_([0-9]+): '(.*)'.*", line)
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# Inline comments
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i = re.match(" +inline_comment[0-9]+: '(.*)'.*", line)
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if m:
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if next_line_break:
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out_str += '\n'
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next_line_break = False
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for x in range(0, int(m.group(1))):
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out_str += " "
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out_str += "#%s\n" % m.group(2)
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elif i:
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out_str += " #%s\n" % i.group(1)
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next_line_break = False
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else:
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if next_line_break:
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out_str += '\n'
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out_str += line
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next_line_break = True
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if next_line_break:
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out_str += '\n'
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with open(filename, 'w') as f:
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f.write(out_str)
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return out_str
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class TemplateDumper(yaml.SafeDumper):
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def represent_ordered_dict(self, data):
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return self.represent_dict(data.items())
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def description_presenter(self, data):
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if not len(data) > 80:
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return self.represent_scalar('tag:yaml.org,2002:str', data)
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return self.represent_scalar('tag:yaml.org,2002:str', data, style='>')
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class TemplateLoader(yaml.SafeLoader):
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def construct_mapping(self, node):
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self.flatten_mapping(node)
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return collections.OrderedDict(self.construct_pairs(node))
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TemplateDumper.add_representer(six.text_type,
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TemplateDumper.description_presenter)
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TemplateDumper.add_representer(six.binary_type,
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TemplateDumper.description_presenter)
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TemplateDumper.add_representer(collections.OrderedDict,
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TemplateDumper.represent_ordered_dict)
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TemplateLoader.add_constructor(yaml.resolver.BaseResolver.DEFAULT_MAPPING_TAG,
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TemplateLoader.construct_mapping)
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def write_template(template, filename=None):
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with open(filename, 'w') as f:
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yaml.dump(template, f, TemplateDumper, width=120,
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default_flow_style=False)
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def validate_template(template):
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if not os.path.exists(template):
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raise RuntimeError('Template not provided.')
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if not os.path.isfile(template):
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raise RuntimeError('Template %s is not a file.')
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pass
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def backup_template(template):
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extension = datetime.datetime.now().strftime('%Y%m%d%H%M%S')
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backup_filename = os.path.realpath(template) + '.' + extension
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if os.path.exists(backup_filename):
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raise RuntimeError('Backupe file: %s already exists. Aborting!'
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% backup_filename)
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shutil.copyfile(template, backup_filename)
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print('The original template was saved as: %s' % backup_filename)
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def needs_conversion():
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with open(OPTS.template, 'r') as f:
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template = yaml.load(f.read(), Loader=TemplateLoader)
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net_config_res = template['resources'].get('OsNetConfigImpl')
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if (net_config_res and net_config_res[
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'type'] == 'OS::Heat::SoftwareConfig'):
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backup_template(OPTS.template)
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if not OPTS.discard_comments:
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# Convert comments '# ...' into 'comments<num>: ...'
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# is not lost when loading the data.
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to_commented_yaml(OPTS.template)
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return True
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return False
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def convert_to_heat_value_resource():
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if needs_conversion():
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with open(OPTS.template, 'r') as f:
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template = yaml.load(f.read(), Loader=TemplateLoader)
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net_config_res = template['resources']['OsNetConfigImpl']
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net_config_res_props = net_config_res['properties']
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# set the type to OS::Heat::Value
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net_config_res['type'] = 'OS::Heat::Value'
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del net_config_res_props['group']
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old_config = net_config_res_props['config']
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new_config = old_config['str_replace']['params']['$network_config']
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del net_config_res_props['config']
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net_config_res_props['value'] = new_config
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outputs = template['outputs']
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del outputs['OS::stack_id']
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outputs['config'] = {}
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outputs['config']['value'] = 'get_attr[OsNetConfigImpl, value]'
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write_template(template, filename=OPTS.template)
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if not OPTS.discard_comments:
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# Convert previously converted comments, 'comments<num>: ...'
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# YAML back to normal #commented YAML
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to_normal_yaml(OPTS.template)
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print('The update template was saved as: %s' % OPTS.template)
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else:
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print('Template does not need conversion: %s' % OPTS.template)
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OPTS = parse_opts(sys.argv)
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convert_to_heat_value_resource()
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