Source code for

# Copyright 2013-2022 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
from spack.util.environment import EnvironmentModifications

[docs]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. # else: if 'color' in os.getenv('TERM', '') and prompt: prompt = colorize('@G{%s}' % prompt, color=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='$$$$';\n" cmds += ' fi;\n' cmds += ' export SPACK_OLD_PS1="${PS1}";\n' cmds += 'fi;\n' cmds += 'export PS1="%s ${PS1}";\n' % prompt return cmds
[docs]def deactivate_header(shell): cmds = '' if shell == 'csh': cmds += 'unsetenv SPACK_ENV;\n' cmds += 'if ( $?SPACK_OLD_PROMPT ) ' cmds += 'set prompt="$SPACK_OLD_PROMPT" && ' cmds += 'unsetenv SPACK_OLD_PROMPT;\n' cmds += 'unalias despacktivate;\n' elif shell == 'fish': cmds += 'set -e SPACK_ENV;\n' cmds += 'functions -e despacktivate;\n' # # NOTE: Not changing fish_prompt (above) => no need to restore it here. # else: cmds += 'if [ ! -z ${SPACK_ENV+x} ]; then\n' cmds += 'unset SPACK_ENV; export SPACK_ENV;\n' cmds += 'fi;\n' cmds += 'unalias despacktivate;\n' cmds += 'if [ ! -z ${SPACK_OLD_PS1+x} ]; then\n' cmds += ' if [ "$SPACK_OLD_PS1" = \'$$$$\' ]; 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
[docs]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 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(, ' To remove it and resolve the issue, ' 'force concretize with the command:\n', ' spack -e {0} concretize --force'.format( return env_mods
[docs]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 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