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env: make environment search more consistent; simplify code

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- spack.yaml files in the current directory were picked up inconsistently
  -- make this a sure thing by moving that logic into find_environment()
  and moving find_environment() to main()

- simplify arguments to Spack command:
  - remove short args for infrequently used commands (--pdb/-D, -P, -s)
  - `spack -D` now forces an env with a directory
This commit is contained in:
Todd Gamblin 2018-11-05 23:16:27 -08:00
parent 3f68d8c53a
commit 13164b114a
4 changed files with 106 additions and 106 deletions
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41
lib/spack/spack/cmd/env.py
View file

@ -62,9 +62,6 @@ def env_activate_setup_parser(subparser):
def env_activate(args):
if not args.activate_env:
tty.die('spack env activate requires an environment name')
env = args.activate_env
if not args.shell:
msg = [
@ -93,6 +90,9 @@ def env_activate(args):
else:
tty.die("No such environment: '%s'" % env)
if spack_env == os.environ.get('SPACK_ENV'):
tty.die("Environment %s is already active" % args.activate_env)
if args.shell == 'csh':
# TODO: figure out how to make color work for csh
sys.stdout.write('setenv SPACK_ENV %s;\n' % spack_env)
@ -167,7 +167,8 @@ def env_deactivate(args):
#
def env_create_setup_parser(subparser):
"""create a new environment"""
subparser.add_argument('env', help='name of environment to create')
subparser.add_argument(
'create_env', metavar='ENV', help='name of environment to create')
subparser.add_argument(
'-d', '--dir', action='store_true',
help='create an environment in a specific directory')
@ -179,9 +180,9 @@ def env_create_setup_parser(subparser):
def env_create(args):
if args.envfile:
with open(args.envfile) as f:
_env_create(args.env, f, args.dir)
_env_create(args.create_env, f, args.dir)
else:
_env_create(args.env, None, args.dir)
_env_create(args.create_env, None, args.dir)
def _env_create(name_or_path, init_file=None, dir=False):
@ -211,33 +212,38 @@ def _env_create(name_or_path, init_file=None, dir=False):
def env_remove_setup_parser(subparser):
"""remove an existing environment"""
subparser.add_argument(
'env', nargs='+', help='environment(s) to remove')
'rm_env', metavar='ENV', nargs='+',
help='environment(s) to remove')
arguments.add_common_arguments(subparser, ['yes_to_all'])
def env_remove(args):
for env_name in args.env:
env = ev.disambiguate(env_name)
if not env:
tty.die('no such environment: %s' % env_name)
"""Remove a *named* environment.
This removes an environment managed by Spack. Directory environments
and `spack.yaml` files embedded in repositories should be removed
manually.
"""
read_envs = []
for env_name in args.rm_env:
env = ev.read(env_name)
read_envs.append(env)
if not args.yes_to_all:
answer = tty.get_yes_or_no(
'Really remove %s %s?' % (
string.plural(len(args.env), 'environment', show_n=False),
string.comma_and(args.env)),
string.plural(len(args.rm_env), 'environment', show_n=False),
string.comma_and(args.rm_env)),
default=False)
if not answer:
tty.die("Will not remove any environments")
for env_name in args.env:
env = ev.disambiguate(env_name)
for env in read_envs:
if env.active:
tty.die("Environment %s can't be removed while activated.")
env.destroy()
tty.msg("Successfully removed environment '%s'" % env)
tty.msg("Successfully removed environment '%s'" % env.name)
#
@ -245,7 +251,6 @@ def env_remove(args):
#
def env_list_setup_parser(subparser):
"""list available environments"""
pass
def env_list(args):

112
lib/spack/spack/environment.py
View file

@ -131,39 +131,99 @@ def deactivate():
active = None
def get_env(args, cmd_name, required=True):
"""Get target environment from args, environment variables, or spack.yaml.
def find_environment(args):
"""Find active environment from args, spack.yaml, or environment variable.
This is used by a number of commands for determining whether there is
an active environment.
This is called in ``spack.main`` to figure out which environment to
activate.
Check for an environment:
1. via spack -e ENV
Check for an environment in this order:
1. via ``spack -e ENV`` or ``spack -D DIR`` (arguments)
2. as a spack.yaml file in the current directory, or
3. via the SPACK_ENV environment variable.
3. via a path in the SPACK_ENV environment variable.
If an environment is found, read it in. If not, print an error
message referencing the calling command.
If an environment is found, read it in. If not, return None.
Arguments:
args (Namespace): argparse namespace wtih command arguments
cmd_name (str): name of calling command
Returns:
(Environment): a found environment, or ``None``
"""
# try arguments
env = getattr(args, 'env', None)
# try a manifest file in the current directory
# treat env as a name
if env:
if exists(env):
return read(env)
else:
# if env was specified, see if it is a dirctory otherwise, look
# at env_dir (env and env_dir are mutually exclusive)
env = getattr(args, 'env_dir', None)
# if no argument, look for a manifest file
if not env:
if os.path.exists(manifest_name):
env = os.getcwd()
# try the active environment via SPACK_ENV environment variable
# if no env, env_dir, or manifest try the environment
if not env:
env = os.environ.get(spack_env_var)
# nothing was set; there's no active environment
if not env:
return None
# if we get here, env isn't the name of a spack environment; it has
# to be a path to an environment, or there is something wrong.
if is_env_dir(env):
return Environment(env)
raise SpackEnvironmentError('no environment in %s' % env)
def get_env(args, cmd_name, required=True):
"""Used by commands to get the active environment.
This first checks for an ``env`` argument, then looks at the
``active`` environment. We check args first because Spack's
subcommand arguments are parsed *after* the ``-e`` and ``-D``
arguments to ``spack``. So there may be an ``env`` argument that is
*not* the active environment, and we give it precedence.
This is used by a number of commands for determining whether there is
an active environment.
If an environment is not found *and* is required, print an error
message that says the calling command *needs* an active environment.
Arguments:
args (Namespace): argparse namespace wtih command arguments
cmd_name (str): name of calling command
required (bool): if ``False``, return ``None`` if no environment
is found instead of raising an exception.
Returns:
(Environment): if there is an arg or active environment
"""
# try argument first
env = getattr(args, 'env', None)
if env:
if exists(env):
return read(env)
elif is_env_dir(env):
return Environment(env)
else:
raise SpackEnvironmentError('no environment in %s' % env)
# try the active environment. This is set by find_environment() (above)
if active:
return active
elif not required:
return None
else:
tty.die(
'`spack %s` requires an environment' % cmd_name,
'activate an environment first:',
@ -171,34 +231,6 @@ def get_env(args, cmd_name, required=True):
'or use:',
' spack -e ENV %s ...' % cmd_name)
environment = disambiguate(env)
if not environment:
tty.die('no such environment: %s' % env)
return environment
def disambiguate(env, env_dir=None):
"""Used to determine whether an environment is named or a directory."""
if env:
if exists(env):
# treat env as a name
return read(env)
env_dir = env
if not env_dir:
env_dir = os.environ.get(spack_env_var)
if not env_dir:
return None
if os.path.isdir(env_dir):
if is_env_dir(env_dir):
return Environment(env_dir)
else:
raise SpackEnvironmentError('no environment in %s' % env_dir)
return None
def root(name):
"""Get the root directory for an environment by name."""

29
lib/spack/spack/main.py
View file

@ -585,31 +585,6 @@ def shell_set(var, value):
shell_set('_sp_module_prefix', 'not_installed')
def activate_environment(env, env_dir, use_env_repo):
"""Activate an environment from command line arguments or an env var."""
if env:
if ev.exists(env):
# treat env as a name
ev.activate(ev.read(env), use_env_repo)
return
env_dir = env
if not env_dir:
env_dir = os.environ.get(spack.environment.spack_env_var)
if not env_dir:
return
if os.path.isdir(env_dir):
if ev.is_env_dir(env_dir):
ev.activate(ev.Environment(env_dir), use_env_repo)
else:
tty.die('no environment in %s' % env_dir)
return
tty.die('no such environment: %s' % env_dir)
def main(argv=None):
"""This is the entry point for the Spack command.
@ -627,7 +602,9 @@ def main(argv=None):
# activate an environment if one was specified on the command line
if not args.no_env:
activate_environment(args.env, args.env_dir, args.use_env_repo)
env = ev.find_environment(args)
if env:
ev.activate(env, args.use_env_repo)
# make spack.config aware of any command line configuration scopes
if args.config_scopes:

14
lib/spack/spack/test/cmd/env.py
View file

@ -75,20 +75,6 @@ def test_env_remove(capfd):
assert 'bar' not in out
def test_remove_env_dir(capfd):
env('create', '-d', 'foo')
assert os.path.isdir('foo')
foo = ev.Environment('foo')
with foo:
with pytest.raises(spack.main.SpackCommandError):
with capfd.disabled():
env('remove', '-y', 'foo')
env('remove', '-y', './foo')
assert not os.path.isdir('foo')
def test_concretize():
e = ev.create('test')
e.add('mpileaks')