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# This file is part of cloud-init. See LICENSE file for license information.
from . import eni
from . import RendererNotFoundError
from . import sysconfig
NAME_TO_RENDERER = {
"eni": eni,
"sysconfig": sysconfig,
}
DEFAULT_PRIORITY = ["eni", "sysconfig"]
def search(priority=None, target=None, first=False):
if priority is None:
priority = DEFAULT_PRIORITY
available = NAME_TO_RENDERER
unknown = [i for i in priority if i not in available]
if unknown:
raise ValueError(
"Unknown renderers provided in priority list: %s" % unknown)
found = []
for name in priority:
render_mod = available[name]
if render_mod.available(target):
cur = (name, render_mod.Renderer)
if first:
return cur
found.append(cur)
return found
def select(priority=None, target=None):
found = search(priority, target=target, first=True)
if not found:
if priority is None:
priority = DEFAULT_PRIORITY
tmsg = ""
if target and target != "/":
tmsg = " in target=%s" % target
raise RendererNotFoundError(
"No available network renderers found%s. Searched "
"through list: %s" % (tmsg, priority))
return found
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