6bdfd93c9c
This replicates the behavior of the custom Jinja2 loader from tripleo-common to allow template validation on the local filesystem using tox. Change-Id: I27683ab31187c6334dc5b4b5363a3347874b9a90 Partially-Implements: blueprint overcloud-upgrades-per-service Depends-On: Idc5c3f49c7a2fc7f3622c76da001992cc657384e
169 lines
7.3 KiB
Python
Executable File
169 lines
7.3 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 jinja2
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import os
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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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__tht_root_dir = os.path.dirname(os.path.dirname(__file__))
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def parse_opts(argv):
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parser = argparse.ArgumentParser(
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description='Configure host network interfaces using a JSON'
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' config file format.')
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parser.add_argument('-p', '--base_path', metavar='BASE_PATH',
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help="""base path of templates to process.""",
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default='.')
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parser.add_argument('-r', '--roles-data', metavar='ROLES_DATA',
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help="""relative path to the roles_data.yaml file.""",
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default='roles_data.yaml')
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parser.add_argument('--safe',
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action='store_true',
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help="""Enable safe mode (do not overwrite files).""",
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default=False)
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parser.add_argument('-o', '--output-dir', metavar='OUTPUT_DIR',
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help="""Output dir for all the templates""",
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default='')
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opts = parser.parse_args(argv[1:])
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return opts
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def _j2_render_to_file(j2_template, j2_data, outfile_name=None,
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overwrite=True):
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yaml_f = outfile_name or j2_template.replace('.j2.yaml', '.yaml')
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print('rendering j2 template to file: %s' % outfile_name)
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if not overwrite and os.path.exists(outfile_name):
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print('ERROR: path already exists for file: %s' % outfile_name)
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sys.exit(1)
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# Search for templates relative to the current template path first
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template_base = os.path.dirname(yaml_f)
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j2_loader = jinja2.loaders.FileSystemLoader([template_base, __tht_root_dir])
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try:
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# Render the j2 template
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template = jinja2.Environment(loader=j2_loader).from_string(
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j2_template)
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r_template = template.render(**j2_data)
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except jinja2.exceptions.TemplateError as ex:
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error_msg = ("Error rendering template %s : %s"
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% (yaml_f, six.text_type(ex)))
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print(error_msg)
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raise Exception(error_msg)
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with open(outfile_name, 'w') as out_f:
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out_f.write(r_template)
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def process_templates(template_path, role_data_path, output_dir, overwrite):
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with open(role_data_path) as role_data_file:
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role_data = yaml.safe_load(role_data_file)
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j2_excludes_path = os.path.join(template_path, 'j2_excludes.yaml')
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with open(j2_excludes_path) as role_data_file:
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j2_excludes = yaml.safe_load(role_data_file)
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if output_dir and not os.path.isdir(output_dir):
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if os.path.exists(output_dir):
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raise RuntimeError('Output dir %s is not a directory' % output_dir)
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os.mkdir(output_dir)
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role_names = [r.get('name') for r in role_data]
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r_map = {}
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for r in role_data:
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r_map[r.get('name')] = r
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excl_templates = ['%s/%s' % (template_path, e)
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for e in j2_excludes.get('name')]
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if os.path.isdir(template_path):
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for subdir, dirs, files in os.walk(template_path):
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# NOTE(flaper87): Ignore hidden dirs as we don't
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# generate templates for those.
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# Note the slice assigment for `dirs` is necessary
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# because we need to modify the *elements* in the
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# dirs list rather than the reference to the list.
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# This way we'll make sure os.walk will iterate over
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# the shrunk list. os.walk doesn't have an API for
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# filtering dirs at this point.
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dirs[:] = [d for d in dirs if not d[0] == '.']
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files = [f for f in files if not f[0] == '.']
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# NOTE(flaper87): We could have used shutil.copytree
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# but it requires the dst dir to not be present. This
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# approach is safer as it doesn't require us to delete
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# the output_dir in advance and it allows for running
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# the command multiple times with the same output_dir.
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out_dir = subdir
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if output_dir:
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out_dir = os.path.join(output_dir, subdir)
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if not os.path.exists(out_dir):
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os.mkdir(out_dir)
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for f in files:
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file_path = os.path.join(subdir, f)
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# We do two templating passes here:
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# 1. *.role.j2.yaml - we template just the role name
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# and create multiple files (one per role)
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# 2. *.j2.yaml - we template with all roles_data,
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# and create one file common to all roles
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if f.endswith('.role.j2.yaml'):
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print("jinja2 rendering role template %s" % f)
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with open(file_path) as j2_template:
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template_data = j2_template.read()
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print("jinja2 rendering roles %s" % ","
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.join(role_names))
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for role in role_names:
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j2_data = {'role': role}
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# (dprince) For the undercloud installer we don't
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# want to have heat check nova/glance API's
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if r_map[role].get('disable_constraints', False):
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j2_data['disable_constraints'] = True
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out_f = "-".join(
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[role.lower(),
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os.path.basename(f).replace('.role.j2.yaml',
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'.yaml')])
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out_f_path = os.path.join(out_dir, out_f)
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if not (out_f_path in excl_templates):
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_j2_render_to_file(template_data, j2_data,
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out_f_path, overwrite)
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else:
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print('skipping rendering of %s' % out_f_path)
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elif f.endswith('.j2.yaml'):
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print("jinja2 rendering normal template %s" % f)
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with open(file_path) as j2_template:
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template_data = j2_template.read()
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j2_data = {'roles': role_data}
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out_f = os.path.basename(f).replace('.j2.yaml', '.yaml')
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out_f_path = os.path.join(out_dir, out_f)
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_j2_render_to_file(template_data, j2_data, out_f_path,
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overwrite)
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elif output_dir:
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shutil.copy(os.path.join(subdir, f), out_dir)
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else:
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print('Unexpected argument %s' % template_path)
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opts = parse_opts(sys.argv)
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role_data_path = os.path.join(opts.base_path, opts.roles_data)
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process_templates(opts.base_path, role_data_path, opts.output_dir, (not opts.safe))
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