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Easily resolve HAB_FREEZE when inside of that config #123

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Easily resolve HAB_FREEZE when inside of that config #123

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24 changes: 21 additions & 3 deletions hab/resolver.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,14 +5,15 @@
import enum
import fnmatch
import logging
import os
from contextlib import contextmanager

import anytree
from packaging.requirements import Requirement

from . import utils
from .errors import HabError, InvalidRequirementError, _IgnoredVersionError
from .parsers import Config, HabBase, StubDistroVersion
from .parsers import Config, HabBase, StubDistroVersion, UnfrozenConfig
from .site import Site
from .solvers import Solver
from .user_prefs import UserPrefs
Expand Down Expand Up @@ -567,15 +568,32 @@ def parse_distros(self, distro_finders, forest=None):
logger.debug(str(error))
return forest

def resolve(self, uri, forced_requirements=None):
def resolve(self, uri=None, from_env=False, forced_requirements=None):
"""Find the closest configuration and reduce it into its final form.

Args:
uri (str): The URI to resolve.
uri (str, optional): The URI to resolve.
from_env (bool, optional): If enabled return a `UnfrozenConfig` built
from the `HAB_FREEZE` environment variable if set. Otherwise
use the `HAB_PATHS` env variable if set and `uri` is None.
forced_requirements (list, optional): A list of additional distro version
requirements to respect even if they are not specified in a config.
Has :py:meth:`hab.solvers.Solver.simplify_requirements` called on it.
"""
if from_env:
# If the HAB_FREEZE env var is set, just return it as a UnfrozenConfig
freeze = os.getenv("HAB_FREEZE")
if freeze:
return UnfrozenConfig(freeze, self)
# Otherwise if uri is not specified resolve the URI stored in HAB_URI
if uri is None:
uri = os.getenv("HAB_URI")
if uri is None:
logger.warning(
'The "HAB_FREEZE" or "HAB_URI" env vars are not defined, '
"can't resolve from_env."
)

uri = self.uri_validate(uri)
context = self.closest_config(uri)
try:
Expand Down