def test_reverse_environment_modifications(working_env):
start_env = {
'PREPEND_PATH': '/path/to/prepend/to',
'APPEND_PATH': '/path/to/append/to',
'UNSET': 'var_to_unset',
'APPEND_FLAGS': 'flags to append to',
}
to_reverse = envutil.EnvironmentModifications()
to_reverse.prepend_path('PREPEND_PATH', '/new/path/prepended')
to_reverse.append_path('APPEND_PATH', '/new/path/appended')
to_reverse.set_path('SET_PATH', ['/one/set/path', '/two/set/path'])
to_reverse.set('SET', 'a var')
to_reverse.unset('UNSET')
to_reverse.append_flags('APPEND_FLAGS', 'more_flags')
reversal = to_reverse.reversed()
os.environ = start_env.copy()
print(os.environ)
to_reverse.apply_modifications()
print(os.environ)
reversal.apply_modifications()
print(os.environ)
start_env.pop('UNSET')
assert os.environ == start_env
def parse(config_obj):
"""Returns an EnvironmentModifications object containing the modifications
parsed from input.
Args:
config_obj: a configuration dictionary conforming to the
schema definition for environment modifications
"""
import sys
import spack.util.environment as ev
if sys.version_info >= (3, 5):
from collections.abc import Sequence # novm
else:
from collections import Sequence # novm
env = ev.EnvironmentModifications()
for command, variable in config_obj.items():
# Distinguish between commands that take only a name as argument
# (e.g. unset) and commands that take a name and a value.
if isinstance(variable, Sequence):
for name in variable:
getattr(env, command)(name)
else:
for name, value in variable.items():
getattr(env, command)(name, value)
return env
def unconditional_environment_modifications(view):
"""List of environment (shell) modifications to be processed for view.
This list does not depend on the specs in this environment"""
env = environment.EnvironmentModifications()
for subdir, vars in prefix_inspections(sys.platform).items():
full_subdir = os.path.join(view.root, subdir)
for var in vars:
env.prepend_path(var, full_subdir)
return env