calculate subnet/netmask from cidr
[yaml_builds.git] / scripts / jcopy.py
1 #!/usr/bin/python
2 ##############################################################################
3 # Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.        #
4 #                                                                            #
5 # Licensed under the Apache License, Version 2.0 (the "License"); you may    #
6 # not use this file except in compliance with the License.                   #
7 #                                                                            #
8 # You may obtain a copy of the License at                                    #
9 #       http://www.apache.org/licenses/LICENSE-2.0                           #
10 #                                                                            #
11 # Unless required by applicable law or agreed to in writing, software        #
12 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT  #
13 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.           #
14 # See the License for the specific language governing permissions and        #
15 # limitations under the License.                                             #
16 ##############################################################################
17
18 #  jcopy.py - Copy a file or files to a target directory, making
19 #    substitutions as needed from the values contained in a YAML file.
20 #    compatibile with python and python3
21 #
22 #  usage: jcopy.py <yaml_input> <template_dir_or_file> <out_dir>
23
24 import os.path
25 import jinja2
26 import sys
27 import yaml
28 import netaddr
29
30 def cidr_netmask(value):
31   if '/' in str(value):
32     v = netaddr.IPNetwork(value)
33     result = v.netmask
34   else:
35     result = "ERROR"
36   return result
37
38 def cidr_subnet(value):
39   if '/' in str(value):
40     v = netaddr.IPNetwork(value)
41     result = v.network
42   else:
43     result = "ERROR"
44   return result
45
46 def usage(msg=None):
47   if not msg is None:
48     print(msg)
49   print( 'usage: jcopy.py <yaml> <template_dir_or_file> <out_dir>' )
50   sys.exit(1)
51
52 def expand_template( t, output_fname, fill=60 ):
53   print( '### {0: <{fill}} ==> {1}'.format(t.filename, output_fname, fill=fill) )
54   if not os.path.exists(os.path.dirname(output_fname)):
55     os.makedirs(os.path.dirname(output_fname))
56   t.stream(yaml=siteyaml).dump(output_fname)
57
58 if len(sys.argv) != 4:
59   usage('incorrect number of arguments')
60
61 yaml_input=sys.argv[1]
62 j2in_name=sys.argv[2]
63 yaml_out=sys.argv[3]
64
65 if not os.path.isfile(yaml_input):
66   usage('input yaml file {} does not exist'.format(yaml_input))
67
68 with open(yaml_input) as f:
69   siteyaml = yaml.safe_load(f)
70
71 if os.path.isfile(j2in_name):
72   j2_env = jinja2.Environment(loader=jinja2.FileSystemLoader(os.path.dirname(j2in_name)), trim_blocks=True, lstrip_blocks=True, keep_trailing_newline=True, undefined=jinja2.make_logging_undefined())
73   j2_env.filters['cidr_netmask'] = cidr_netmask
74   j2_env.filters['cidr_subnet'] = cidr_subnet
75   expand_template(j2_env.get_template(name=os.path.basename(j2in_name)),yaml_out,len(j2in_name))
76 else:
77   j2_env = jinja2.Environment(loader=jinja2.FileSystemLoader(j2in_name), trim_blocks=True, lstrip_blocks=True, keep_trailing_newline=True, undefined=jinja2.make_logging_undefined())
78   j2_env.filters['cidr_netmask'] = cidr_netmask
79   j2_env.filters['cidr_subnet'] = cidr_subnet
80   templates=j2_env.list_templates(extensions=('j2'))
81   fill=len(max(templates,key=len))+len(j2in_name)
82   for f in templates:
83     expand_template(j2_env.get_template(name=f), yaml_out+'/'+f.replace('.j2','.yaml'), fill)
84   print('%d files processed.' % len(templates))
85
86 sys.exit(0)
87
88 # sudo apt-get install python-jinja2 python-yaml
89 # sudo apt-get install python3-jinja2 python3-yaml