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# Copyright 2013-2023 Lawrence Livermore National Security, LLC and other
# Spack Project Developers. See the top-level COPYRIGHT file for details.
#
# SPDX-License-Identifier: (Apache-2.0 OR MIT)
import os
import llnl.util.tty as tty
from llnl.util.tty.color import colorize
import spack.environment as ev
import spack.repo
import spack.store
from spack.util.environment import EnvironmentModifications
def activate_header(env, shell, prompt=None):
# Construct the commands to run
cmds = ""
if shell == "csh":
# TODO: figure out how to make color work for csh
cmds += "setenv SPACK_ENV %s;\n" % env.path
cmds += 'alias despacktivate "spack env deactivate";\n'
if prompt:
cmds += "if (! $?SPACK_OLD_PROMPT ) "
cmds += 'setenv SPACK_OLD_PROMPT "${prompt}";\n'
cmds += 'set prompt="%s ${prompt}";\n' % prompt
elif shell == "fish":
if "color" in os.getenv("TERM", "") and prompt:
prompt = colorize("@G{%s} " % prompt, color=True)
cmds += "set -gx SPACK_ENV %s;\n" % env.path
cmds += "function despacktivate;\n"
cmds += " spack env deactivate;\n"
cmds += "end;\n"
#
# NOTE: We're not changing the fish_prompt function (which is fish's
# solution to the PS1 variable) here. This is a bit fiddly, and easy to
# screw up => spend time reasearching a solution. Feedback welcome.
#
elif shell == "bat":
# TODO: Color
cmds += 'set "SPACK_ENV=%s"\n' % env.path
# TODO: despacktivate
# TODO: prompt
elif shell == "pwsh":
cmds += "$Env:SPACK_ENV=%s\n" % env.path
else:
if "color" in os.getenv("TERM", "") and prompt:
prompt = colorize("@G{%s}" % prompt, color=True, enclose=True)
cmds += "export SPACK_ENV=%s;\n" % env.path
cmds += "alias despacktivate='spack env deactivate';\n"
if prompt:
cmds += "if [ -z ${SPACK_OLD_PS1+x} ]; then\n"
cmds += " if [ -z ${PS1+x} ]; then\n"
cmds += " PS1='$$$$';\n"
cmds += " fi;\n"
cmds += ' export SPACK_OLD_PS1="${PS1}";\n'
cmds += "fi;\n"
cmds += 'export PS1="%s ${PS1}";\n' % prompt
return cmds
def deactivate_header(shell):
cmds = ""
if shell == "csh":
cmds += "unsetenv SPACK_ENV;\n"
cmds += "if ( $?SPACK_OLD_PROMPT ) "
cmds += ' eval \'set prompt="$SPACK_OLD_PROMPT" &&'
cmds += " unsetenv SPACK_OLD_PROMPT';\n"
cmds += "unalias despacktivate;\n"
elif shell == "fish":
cmds += "set -e SPACK_ENV;\n"
cmds += "functions -e despacktivate;\n"
#
# NOTE: Not changing fish_prompt (above) => no need to restore it here.
#
elif shell == "bat":
# TODO: Color
cmds += 'set "SPACK_ENV="\n'
# TODO: despacktivate
# TODO: prompt
elif shell == "pwsh":
cmds += "Remove-Item Env:SPACK_ENV"
else:
cmds += "if [ ! -z ${SPACK_ENV+x} ]; then\n"
cmds += "unset SPACK_ENV; export SPACK_ENV;\n"
cmds += "fi;\n"
cmds += "alias despacktivate > /dev/null 2>&1 && unalias despacktivate;\n"
cmds += "if [ ! -z ${SPACK_OLD_PS1+x} ]; then\n"
cmds += " if [ \"$SPACK_OLD_PS1\" = '$$$$' ]; then\n"
cmds += " unset PS1; export PS1;\n"
cmds += " else\n"
cmds += ' export PS1="$SPACK_OLD_PS1";\n'
cmds += " fi;\n"
cmds += " unset SPACK_OLD_PS1; export SPACK_OLD_PS1;\n"
cmds += "fi;\n"
return cmds
def activate(env, use_env_repo=False, add_view=True):
"""
Activate an environment and append environment modifications
To activate an environment, we add its configuration scope to the
existing Spack configuration, and we set active to the current
environment.
Arguments:
env (spack.environment.Environment): the environment to activate
use_env_repo (bool): use the packages exactly as they appear in the
environment's repository
add_view (bool): generate commands to add view to path variables
Returns:
spack.util.environment.EnvironmentModifications: Environment variables
modifications to activate environment.
"""
ev.activate(env, use_env_repo=use_env_repo)
env_mods = EnvironmentModifications()
#
# NOTE in the fish-shell: Path variables are a special kind of variable
# used to support colon-delimited path lists including PATH, CDPATH,
# MANPATH, PYTHONPATH, etc. All variables that end in PATH (case-sensitive)
# become PATH variables.
#
try:
if add_view and ev.default_view_name in env.views:
with spack.store.STORE.db.read_transaction():
env.add_default_view_to_env(env_mods)
except (spack.repo.UnknownPackageError, spack.repo.UnknownNamespaceError) as e:
tty.error(e)
tty.die(
"Environment view is broken due to a missing package or repo.\n",
" To activate without views enabled, activate with:\n",
" spack env activate -V {0}\n".format(env.name),
" To remove it and resolve the issue, " "force concretize with the command:\n",
" spack -e {0} concretize --force".format(env.name),
)
return env_mods
def deactivate():
"""
Deactivate an environment and collect corresponding environment modifications.
Note: unloads the environment in its current state, not in the state it was
loaded in, meaning that specs that were removed from the spack environment
after activation are not unloaded.
Returns:
spack.util.environment.EnvironmentModifications: Environment variables
modifications to activate environment.
"""
env_mods = EnvironmentModifications()
active = ev.active_environment()
if active is None:
return env_mods
if ev.default_view_name in active.views:
try:
with spack.store.STORE.db.read_transaction():
active.rm_default_view_from_env(env_mods)
except (spack.repo.UnknownPackageError, spack.repo.UnknownNamespaceError) as e:
tty.warn(e)
tty.warn(
"Could not fully deactivate view due to missing package "
"or repo, shell environment may be corrupt."
)
ev.deactivate()
return env_mods
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