1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
#!/usr/bin/env python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import argparse
import jinja2
import os
import shutil
import six
import sys
import yaml
def parse_opts(argv):
parser = argparse.ArgumentParser(
description='Configure host network interfaces using a JSON'
' config file format.')
parser.add_argument('-p', '--base_path', metavar='BASE_PATH',
help="""base path of templates to process.""",
default='.')
parser.add_argument('-r', '--roles-data', metavar='ROLES_DATA',
help="""relative path to the roles_data.yaml file.""",
default='roles_data.yaml')
parser.add_argument('--safe',
action='store_true',
help="""Enable safe mode (do not overwrite files).""",
default=False)
parser.add_argument('-o', '--output-dir', metavar='OUTPUT_DIR',
help="""Output dir for all the templates""",
default='')
opts = parser.parse_args(argv[1:])
return opts
def _j2_render_to_file(j2_template, j2_data, outfile_name=None,
overwrite=True):
yaml_f = outfile_name or j2_template.replace('.j2.yaml', '.yaml')
print('rendering j2 template to file: %s' % outfile_name)
if not overwrite and os.path.exists(outfile_name):
print('ERROR: path already exists for file: %s' % outfile_name)
sys.exit(1)
try:
# Render the j2 template
template = jinja2.Environment().from_string(j2_template)
r_template = template.render(**j2_data)
except jinja2.exceptions.TemplateError as ex:
error_msg = ("Error rendering template %s : %s"
% (yaml_f, six.text_type(ex)))
print(error_msg)
raise Exception(error_msg)
with open(outfile_name, 'w') as out_f:
out_f.write(r_template)
def process_templates(template_path, role_data_path, output_dir, overwrite):
with open(role_data_path) as role_data_file:
role_data = yaml.safe_load(role_data_file)
j2_excludes_path = os.path.join(template_path, 'j2_excludes.yaml')
with open(j2_excludes_path) as role_data_file:
j2_excludes = yaml.safe_load(role_data_file)
if output_dir and not os.path.isdir(output_dir):
if os.path.exists(output_dir):
raise RuntimeError('Output dir %s is not a directory' % output_dir)
os.mkdir(output_dir)
role_names = [r.get('name') for r in role_data]
r_map = {}
for r in role_data:
r_map[r.get('name')] = r
excl_templates = ['%s/%s' % (template_path, e)
for e in j2_excludes.get('name')]
if os.path.isdir(template_path):
for subdir, dirs, files in os.walk(template_path):
# NOTE(flaper87): Ignore hidden dirs as we don't
# generate templates for those.
# Note the slice assigment for `dirs` is necessary
# because we need to modify the *elements* in the
# dirs list rather than the reference to the list.
# This way we'll make sure os.walk will iterate over
# the shrunk list. os.walk doesn't have an API for
# filtering dirs at this point.
dirs[:] = [d for d in dirs if not d[0] == '.']
files = [f for f in files if not f[0] == '.']
# NOTE(flaper87): We could have used shutil.copytree
# but it requires the dst dir to not be present. This
# approach is safer as it doesn't require us to delete
# the output_dir in advance and it allows for running
# the command multiple times with the same output_dir.
out_dir = subdir
if output_dir:
out_dir = os.path.join(output_dir, subdir)
if not os.path.exists(out_dir):
os.mkdir(out_dir)
for f in files:
file_path = os.path.join(subdir, f)
# We do two templating passes here:
# 1. *.role.j2.yaml - we template just the role name
# and create multiple files (one per role)
# 2. *.j2.yaml - we template with all roles_data,
# and create one file common to all roles
if f.endswith('.role.j2.yaml'):
print("jinja2 rendering role template %s" % f)
with open(file_path) as j2_template:
template_data = j2_template.read()
print("jinja2 rendering roles %s" % ","
.join(role_names))
for role in role_names:
j2_data = {'role': role}
# (dprince) For the undercloud installer we don't
# want to have heat check nova/glance API's
if r_map[role].get('disable_constraints', False):
j2_data['disable_constraints'] = True
out_f = "-".join(
[role.lower(),
os.path.basename(f).replace('.role.j2.yaml',
'.yaml')])
out_f_path = os.path.join(out_dir, out_f)
if not (out_f_path in excl_templates):
_j2_render_to_file(template_data, j2_data,
out_f_path, overwrite)
else:
print('skipping rendering of %s' % out_f_path)
elif f.endswith('.j2.yaml'):
print("jinja2 rendering normal template %s" % f)
with open(file_path) as j2_template:
template_data = j2_template.read()
j2_data = {'roles': role_data}
out_f = os.path.basename(f).replace('.j2.yaml', '.yaml')
out_f_path = os.path.join(out_dir, out_f)
_j2_render_to_file(template_data, j2_data, out_f_path,
overwrite)
elif output_dir:
shutil.copy(os.path.join(subdir, f), out_dir)
else:
print('Unexpected argument %s' % template_path)
opts = parse_opts(sys.argv)
role_data_path = os.path.join(opts.base_path, opts.roles_data)
process_templates(opts.base_path, role_data_path, opts.output_dir, (not opts.safe))
|
