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[WIP] Allow starting an environment from a remote init file #489

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[WIP] Allow starting an environment from a remote init file #489

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36 changes: 28 additions & 8 deletions lago/cmd.py
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,8 @@
import pkg_resources
import sys
import warnings
import urllib2
from tempfile import NamedTemporaryFile

from collections import defaultdict

Expand Down Expand Up @@ -55,14 +57,15 @@
@lago.plugins.cli.cli_plugin_add_argument(
'virt_config',
help=(
'Configuration of resources to deploy, json and yaml file formats '
'are supported, takes option precedence over workdir. Will use '
'$PWD/LagoInitFile by default. You can use any env vars in that file, '
'inculuding the extra ones LAGO_PREFIX_PATH LAGO_WORKDIR_PATH and '
'LAGO_INITFILE_PATH'
'Configuration of resources to deploy, YAML and JSON file formats '
'are supported, takes option precedence over workdir. Also possible '
'to pass a valid URL which will be downloaed. Will use '
'$PWD/LagoInitFile as default. You can use any env vars in that file '
'including the extra ones: LAGO_PREFIX_PATH, LAGO_WORKDIR_PATH and '
'LAGO_INITFILE_PATH. '
),
metavar='VIRT_CONFIG',
type=os.path.abspath,
type=str,
nargs='?',
default=None,
)
Expand All @@ -73,7 +76,7 @@
'$PWD/.lago'
),
metavar='WORKDIR',
type=os.path.abspath,
type=str,
nargs='?',
default=None,
)
Expand Down Expand Up @@ -124,21 +127,38 @@ def do_init(
skip_bootstrap=False,
**kwargs
):

if virt_config is None and workdir is not None:
virt_config = workdir
workdir = None

if workdir is None:
workdir = os.path.abspath('.lago')
else:
workdir = os.path.abspath(workdir)

if virt_config is None:
virt_config = os.path.abspath('LagoInitFile')
elif virt_config.startswith(('http://', 'https://')):
try:
LOGGER.debug('Downloading init file from url %s', virt_config)
res = urllib2.urlopen(virt_config)
except urllib2.URLError as e:
raise LagoUserException(
('Error downloading {0}: '
' {1}').format(virt_config, str(e.msg))
), None, sys.exc_info()[2]
os.environ['LAGO_INITFILE_PATH'] = os.path.abspath(os.curdir)
with NamedTemporaryFile(delete=False) as temp_fd:
temp_fd.writelines(res.readlines())
virt_config = temp_fd.name

if not os.path.isfile(virt_config):
raise LagoUserException(
'Unable to find init file: {0}'.format(virt_config)
)

virt_config = os.path.abspath(virt_config)

os.environ['LAGO_INITFILE_PATH'
] = os.path.dirname(os.path.abspath(virt_config))

Expand Down