mirror of
https://github.com/esphome/esphome.git
synced 2024-11-22 15:08:10 +01:00
135 lines
4.1 KiB
Python
135 lines
4.1 KiB
Python
import logging
|
|
import re
|
|
|
|
import voluptuous as vol
|
|
|
|
from esphomeyaml import core
|
|
import esphomeyaml.config_validation as cv
|
|
from esphomeyaml.core import EsphomeyamlError
|
|
|
|
_LOGGER = logging.getLogger(__name__)
|
|
|
|
CONF_SUBSTITUTIONS = 'substitutions'
|
|
|
|
VALID_SUBSTITUTIONS_CHARACTERS = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' \
|
|
'0123456789_'
|
|
|
|
|
|
def validate_substitution_key(value):
|
|
value = cv.string(value)
|
|
if not value:
|
|
raise vol.Invalid("Substitution key must not be empty")
|
|
if value[0] == '$':
|
|
value = value[1:]
|
|
if value[0].isdigit():
|
|
raise vol.Invalid("First character in substitutions cannot be a digit.")
|
|
for char in value:
|
|
if char not in VALID_SUBSTITUTIONS_CHARACTERS:
|
|
raise vol.Invalid(
|
|
u"Substitution must only consist of upper/lowercase characters, the underscore "
|
|
u"and numbers. The character '{}' cannot be used".format(char))
|
|
return value
|
|
|
|
|
|
CONFIG_SCHEMA = vol.Schema({
|
|
validate_substitution_key: cv.string_strict,
|
|
})
|
|
|
|
|
|
def to_code(config):
|
|
pass
|
|
|
|
|
|
VARIABLE_PROG = re.compile('\\$([{0}]+|\\{{[{0}]*\\}})'.format(VALID_SUBSTITUTIONS_CHARACTERS))
|
|
|
|
|
|
def _expand_substitutions(substitutions, value, path):
|
|
if u'$' not in value:
|
|
return value
|
|
|
|
orig_value = value
|
|
|
|
i = 0
|
|
while True:
|
|
m = VARIABLE_PROG.search(value, i)
|
|
if not m:
|
|
# Nothing more to match. Done
|
|
break
|
|
|
|
i, j = m.span(0)
|
|
name = m.group(1)
|
|
if name.startswith(u'{') and name.endswith(u'}'):
|
|
name = name[1:-1]
|
|
if name not in substitutions:
|
|
_LOGGER.warning(u"Found '%s' (see %s) which looks like a substitution, but '%s' was "
|
|
u"not declared", orig_value, u'->'.join(str(x) for x in path), name)
|
|
i = j
|
|
continue
|
|
|
|
sub = substitutions[name]
|
|
tail = value[j:]
|
|
value = value[:i] + sub
|
|
i = len(value)
|
|
value += tail
|
|
return value
|
|
|
|
|
|
def _substitute_item(substitutions, item, path):
|
|
if isinstance(item, list):
|
|
for i, it in enumerate(item):
|
|
sub = _substitute_item(substitutions, it, path + [i])
|
|
if sub is not None:
|
|
item[i] = sub
|
|
elif isinstance(item, dict):
|
|
replace_keys = []
|
|
for k, v in item.items():
|
|
if path or k != CONF_SUBSTITUTIONS:
|
|
sub = _substitute_item(substitutions, k, path + [k])
|
|
if sub is not None:
|
|
replace_keys.append((k, sub))
|
|
sub = _substitute_item(substitutions, v, path + [k])
|
|
if sub is not None:
|
|
item[k] = sub
|
|
for old, new in replace_keys:
|
|
item[new] = item[old]
|
|
del item[old]
|
|
elif isinstance(item, str):
|
|
sub = _expand_substitutions(substitutions, item, path)
|
|
if sub != item:
|
|
return sub
|
|
elif isinstance(item, core.Lambda):
|
|
sub = _expand_substitutions(substitutions, item.value, path)
|
|
if sub != item:
|
|
item.value = sub
|
|
return None
|
|
|
|
|
|
def do_substitution_pass(config):
|
|
if CONF_SUBSTITUTIONS not in config:
|
|
return config
|
|
|
|
substitutions = config[CONF_SUBSTITUTIONS]
|
|
if not isinstance(substitutions, dict):
|
|
raise EsphomeyamlError(u"Substitutions must be a key to value mapping, got {}"
|
|
u"".format(type(substitutions)))
|
|
|
|
key = ''
|
|
try:
|
|
replace_keys = []
|
|
for key, value in substitutions.items():
|
|
sub = validate_substitution_key(key)
|
|
if sub != key:
|
|
replace_keys.append((key, sub))
|
|
substitutions[key] = cv.string_strict(value)
|
|
for old, new in replace_keys:
|
|
substitutions[new] = substitutions[old]
|
|
del substitutions[old]
|
|
except vol.Invalid as err:
|
|
err.path.append(key)
|
|
|
|
raise EsphomeyamlError(u"Error while parsing substitutions: {}".format(err))
|
|
|
|
config[CONF_SUBSTITUTIONS] = substitutions
|
|
_substitute_item(substitutions, config, [])
|
|
|
|
return config
|