# Copyright 2013-2024 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)
"""This is the implementation of the Spack command line executable.
In a normal Spack installation, this is invoked from the bin/spack script
after the system path is set up.
"""
import argparse
import inspect
import io
import operator
import os
import os.path
import pstats
import re
import shlex
import signal
import subprocess as sp
import sys
import traceback
import warnings
from typing import List, Tuple
import archspec.cpu
import llnl.util.lang
import llnl.util.tty as tty
import llnl.util.tty.colify
import llnl.util.tty.color as color
from llnl.util.tty.log import log_output
import spack.cmd
import spack.config
import spack.environment as ev
import spack.modules
import spack.paths
import spack.platforms
import spack.repo
import spack.solver.asp
import spack.spec
import spack.store
import spack.util.debug
import spack.util.environment
import spack.util.git
import spack.util.path
from spack.error import SpackError
#: names of profile statistics
stat_names = pstats.Stats.sort_arg_dict_default
#: help levels in order of detail (i.e., number of commands shown)
levels = ["short", "long"]
#: intro text for help at different levels
intro_by_level = {
"short": "These are common spack commands:",
"long": "Complete list of spack commands:",
}
#: control top-level spack options shown in basic vs. advanced help
options_by_level = {"short": ["h", "k", "V", "color"], "long": "all"}
#: Longer text for each section, to show in help
section_descriptions = {
"admin": "administration",
"basic": "query packages",
"build": "build packages",
"config": "configuration",
"developer": "developer",
"environment": "environment",
"extensions": "extensions",
"help": "more help",
"packaging": "create packages",
"system": "system",
}
#: preferential command order for some sections (e.g., build pipeline is
#: in execution order, not alphabetical)
section_order = {
"basic": ["list", "info", "find"],
"build": [
"fetch",
"stage",
"patch",
"configure",
"build",
"restage",
"install",
"uninstall",
"clean",
],
"packaging": ["create", "edit"],
}
#: Properties that commands are required to set.
required_command_properties = ["level", "section", "description"]
#: Recorded directory where spack command was originally invoked
spack_working_dir = None
spack_ld_library_path = os.environ.get("LD_LIBRARY_PATH", "")
#: Whether to print backtraces on error
SHOW_BACKTRACE = False
[docs]
def set_working_dir():
"""Change the working directory to getcwd, or spack prefix if no cwd."""
global spack_working_dir
try:
spack_working_dir = os.getcwd()
except OSError:
os.chdir(spack.paths.prefix)
spack_working_dir = spack.paths.prefix
[docs]
def add_all_commands(parser):
"""Add all spack subcommands to the parser."""
for cmd in spack.cmd.all_commands():
parser.add_command(cmd)
[docs]
def get_spack_commit():
"""Get the Spack git commit sha.
Returns:
(str or None) the commit sha if available, otherwise None
"""
git_path = os.path.join(spack.paths.prefix, ".git")
if not os.path.exists(git_path):
return None
git = spack.util.git.git()
if not git:
return None
rev = git(
"-C",
spack.paths.prefix,
"rev-parse",
"HEAD",
output=str,
error=os.devnull,
fail_on_error=False,
)
if git.returncode != 0:
return None
match = re.match(r"[a-f\d]{7,}$", rev)
return match.group(0) if match else None
[docs]
def get_version():
"""Get a descriptive version of this instance of Spack.
Outputs '<PEP440 version> (<git commit sha>)'.
The commit sha is only added when available.
"""
version = spack.spack_version
commit = get_spack_commit()
if commit:
version += " ({0})".format(commit)
return version
[docs]
def index_commands():
"""create an index of commands by section for this help level"""
index = {}
for command in spack.cmd.all_commands():
cmd_module = spack.cmd.get_module(command)
# make sure command modules have required properties
for p in required_command_properties:
prop = getattr(cmd_module, p, None)
if not prop:
tty.die("Command doesn't define a property '%s': %s" % (p, command))
# add commands to lists for their level and higher levels
for level in reversed(levels):
level_sections = index.setdefault(level, {})
commands = level_sections.setdefault(cmd_module.section, [])
commands.append(command)
if level == cmd_module.level:
break
return index
[docs]
class SpackArgumentParser(argparse.ArgumentParser):
[docs]
def add_subparsers(self, **kwargs):
"""Ensure that sensible defaults are propagated to subparsers"""
kwargs.setdefault("metavar", "SUBCOMMAND")
# From Python 3.7 we can require a subparser, earlier versions
# of argparse will error because required=True is unknown
if sys.version_info[:2] > (3, 6):
kwargs.setdefault("required", True)
sp = super().add_subparsers(**kwargs)
# This monkey patching is needed for Python 3.6, which supports
# having a required subparser but don't expose the API used above
if sys.version_info[:2] == (3, 6):
sp.required = True
old_add_parser = sp.add_parser
def add_parser(name, **kwargs):
kwargs.setdefault("formatter_class", SpackHelpFormatter)
return old_add_parser(name, **kwargs)
sp.add_parser = add_parser
return sp
[docs]
def add_command(self, cmd_name):
"""Add one subcommand to this parser."""
# lazily initialize any subparsers
if not hasattr(self, "subparsers"):
# remove the dummy "command" argument.
if self._actions[-1].dest == "command":
self._remove_action(self._actions[-1])
self.subparsers = self.add_subparsers(metavar="COMMAND", dest="command")
if cmd_name not in self.subparsers._name_parser_map:
# each command module implements a parser() function, to which we
# pass its subparser for setup.
module = spack.cmd.get_module(cmd_name)
# build a list of aliases
alias_list = []
aliases = spack.config.get("config:aliases")
if aliases:
alias_list = [k for k, v in aliases.items() if shlex.split(v)[0] == cmd_name]
subparser = self.subparsers.add_parser(
cmd_name,
aliases=alias_list,
help=module.description,
description=module.description,
)
module.setup_parser(subparser)
# return the callable function for the command
return spack.cmd.get_command(cmd_name)
def _check_value(self, action, value):
# converted value must be one of the choices (if specified)
if action.choices is not None and value not in action.choices:
cols = llnl.util.tty.colify.colified(sorted(action.choices), indent=4, tty=True)
msg = "invalid choice: %r choose from:\n%s" % (value, cols)
raise argparse.ArgumentError(action, msg)
[docs]
def make_argument_parser(**kwargs):
"""Create an basic argument parser without any subcommands added."""
parser = SpackArgumentParser(
formatter_class=SpackHelpFormatter,
add_help=False,
description=(
"A flexible package manager that supports multiple versions,\n"
"configurations, platforms, and compilers."
),
**kwargs,
)
# stat names in groups of 7, for nice wrapping.
stat_lines = list(zip(*(iter(stat_names),) * 7))
parser.add_argument(
"-h",
"--help",
dest="help",
action="store_const",
const="short",
default=None,
help="show this help message and exit",
)
parser.add_argument(
"-H",
"--all-help",
dest="help",
action="store_const",
const="long",
default=None,
help="show help for all commands (same as spack help --all)",
)
parser.add_argument(
"--color",
action="store",
default=os.environ.get("SPACK_COLOR", "auto"),
choices=("always", "never", "auto"),
help="when to colorize output (default: auto)",
)
parser.add_argument(
"-c",
"--config",
default=None,
action="append",
dest="config_vars",
help="add one or more custom, one off config settings",
)
parser.add_argument(
"-C",
"--config-scope",
dest="config_scopes",
action="append",
metavar="DIR",
help="add a custom configuration scope",
)
parser.add_argument(
"-d",
"--debug",
action="count",
default=0,
help="write out debug messages\n\n(more d's for more verbosity: -d, -dd, -ddd, etc.)",
)
parser.add_argument("--timestamp", action="store_true", help="add a timestamp to tty output")
parser.add_argument("--pdb", action="store_true", help="run spack under the pdb debugger")
env_group = parser.add_mutually_exclusive_group()
env_group.add_argument(
"-e",
"--env",
dest="env",
metavar="ENV",
action="store",
help="run with a specific environment (see spack env)",
)
env_group.add_argument(
"-D",
"--env-dir",
dest="env_dir",
metavar="DIR",
action="store",
help="run with an environment directory (ignore managed environments)",
)
env_group.add_argument(
"-E",
"--no-env",
dest="no_env",
action="store_true",
help="run without any environments activated (see spack env)",
)
parser.add_argument(
"--use-env-repo",
action="store_true",
help="when running in an environment, use its package repository",
)
parser.add_argument(
"-k",
"--insecure",
action="store_true",
help="do not check ssl certificates when downloading",
)
parser.add_argument(
"-l",
"--enable-locks",
action="store_true",
dest="locks",
default=None,
help="use filesystem locking (default)",
)
parser.add_argument(
"-L",
"--disable-locks",
action="store_false",
dest="locks",
help="do not use filesystem locking (unsafe)",
)
parser.add_argument(
"-m", "--mock", action="store_true", help="use mock packages instead of real ones"
)
parser.add_argument(
"-b",
"--bootstrap",
action="store_true",
help="use bootstrap configuration (bootstrap store, config, externals)",
)
parser.add_argument(
"-p",
"--profile",
action="store_true",
dest="spack_profile",
help="profile execution using cProfile",
)
parser.add_argument(
"--sorted-profile",
default=None,
metavar="STAT",
help=f"profile and sort\n\none or more of: {stat_lines[0]}",
)
parser.add_argument(
"--lines",
default=20,
action="store",
help="lines of profile output or 'all' (default: 20)",
)
parser.add_argument(
"-v", "--verbose", action="store_true", help="print additional output during builds"
)
parser.add_argument(
"--stacktrace",
action="store_true",
default="SPACK_STACKTRACE" in os.environ,
help="add stacktraces to all printed statements",
)
parser.add_argument(
"--backtrace",
action="store_true",
default="SPACK_BACKTRACE" in os.environ,
help="always show backtraces for exceptions",
)
parser.add_argument(
"-V", "--version", action="store_true", help="show version number and exit"
)
parser.add_argument(
"--print-shell-vars", action="store", help="print info needed by setup-env.*sh"
)
return parser
[docs]
def send_warning_to_tty(message, *args):
"""Redirects messages to tty.warn."""
tty.warn(message)
[docs]
def setup_main_options(args):
"""Configure spack globals based on the basic options."""
# Assign a custom function to show warnings
warnings.showwarning = send_warning_to_tty
# Set up environment based on args.
tty.set_verbose(args.verbose)
tty.set_debug(args.debug)
tty.set_stacktrace(args.stacktrace)
# debug must be set first so that it can even affect behavior of
# errors raised by spack.config.
if args.debug or args.backtrace:
spack.error.debug = True
global SHOW_BACKTRACE
SHOW_BACKTRACE = True
if args.debug:
spack.util.debug.register_interrupt_handler()
spack.config.set("config:debug", True, scope="command_line")
spack.util.environment.TRACING_ENABLED = True
if args.timestamp:
tty.set_timestamp(True)
# override lock configuration if passed on command line
if args.locks is not None:
if args.locks is False:
spack.util.lock.check_lock_safety(spack.paths.prefix)
spack.config.set("config:locks", args.locks, scope="command_line")
if args.mock:
import spack.util.spack_yaml as syaml
key = syaml.syaml_str("repos")
key.override = True
spack.config.CONFIG.scopes["command_line"].sections["repos"] = syaml.syaml_dict(
[(key, [spack.paths.mock_packages_path])]
)
spack.repo.PATH = spack.repo.create(spack.config.CONFIG)
# If the user asked for it, don't check ssl certs.
if args.insecure:
tty.warn("You asked for --insecure. Will NOT check SSL certificates.")
spack.config.set("config:verify_ssl", False, scope="command_line")
# Use the spack config command to handle parsing the config strings
for config_var in args.config_vars or []:
spack.config.add(fullpath=config_var, scope="command_line")
# On Windows10 console handling for ASCI/VT100 sequences is not
# on by default. Turn on before we try to write to console
# with color
color.try_enable_terminal_color_on_windows()
# when to use color (takes always, auto, or never)
color.set_color_when(args.color)
[docs]
def allows_unknown_args(command):
"""Implements really simple argument injection for unknown arguments.
Commands may add an optional argument called "unknown args" to
indicate they can handle unknonwn args, and we'll pass the unknown
args in.
"""
info = dict(inspect.getmembers(command))
varnames = info["__code__"].co_varnames
argcount = info["__code__"].co_argcount
return argcount == 3 and varnames[2] == "unknown_args"
def _invoke_command(command, parser, args, unknown_args):
"""Run a spack command *without* setting spack global options."""
if allows_unknown_args(command):
return_val = command(parser, args, unknown_args)
else:
if unknown_args:
tty.die("unrecognized arguments: %s" % " ".join(unknown_args))
return_val = command(parser, args)
# Allow commands to return and error code if they want
return 0 if return_val is None else return_val
[docs]
class SpackCommand:
"""Callable object that invokes a spack command (for testing).
Example usage::
install = SpackCommand('install')
install('-v', 'mpich')
Use this to invoke Spack commands directly from Python and check
their output.
"""
def __init__(self, command_name, subprocess=False):
"""Create a new SpackCommand that invokes ``command_name`` when called.
Args:
command_name (str): name of the command to invoke
subprocess (bool): whether to fork a subprocess or not. Currently not supported on
Windows, where it is always False.
"""
self.parser = make_argument_parser()
self.command_name = command_name
# TODO: figure out how to support this on windows
self.subprocess = subprocess if sys.platform != "win32" else False
def __call__(self, *argv, **kwargs):
"""Invoke this SpackCommand.
Args:
argv (list): command line arguments.
Keyword Args:
fail_on_error (optional bool): Don't raise an exception on error
global_args (optional list): List of global spack arguments:
simulates ``spack [global_args] [command] [*argv]``
Returns:
(str): combined output and error as a string
On return, if ``fail_on_error`` is False, return value of command
is set in ``returncode`` property, and the error is set in the
``error`` property. Otherwise, raise an error.
"""
# set these before every call to clear them out
self.returncode = None
self.error = None
prepend = kwargs["global_args"] if "global_args" in kwargs else []
fail_on_error = kwargs.get("fail_on_error", True)
if self.subprocess:
p = sp.Popen(
[spack.paths.spack_script] + prepend + [self.command_name] + list(argv),
stdout=sp.PIPE,
stderr=sp.STDOUT,
)
out, self.returncode = p.communicate()
out = out.decode()
else:
command = self.parser.add_command(self.command_name)
args, unknown = self.parser.parse_known_args(
prepend + [self.command_name] + list(argv)
)
out = io.StringIO()
try:
with log_output(out, echo=True):
self.returncode = _invoke_command(command, self.parser, args, unknown)
except SystemExit as e:
self.returncode = e.code
except BaseException as e:
tty.debug(e)
self.error = e
if fail_on_error:
self._log_command_output(out)
raise
out = out.getvalue()
if fail_on_error and self.returncode not in (None, 0):
self._log_command_output(out)
raise SpackCommandError(
"Command exited with code %d: %s(%s)"
% (self.returncode, self.command_name, ", ".join("'%s'" % a for a in argv))
)
return out
def _log_command_output(self, out):
if tty.is_verbose():
fmt = self.command_name + ": {0}"
for ln in out.getvalue().split("\n"):
if len(ln) > 0:
tty.verbose(fmt.format(ln.replace("==> ", "")))
def _profile_wrapper(command, parser, args, unknown_args):
import cProfile
try:
nlines = int(args.lines)
except ValueError:
if args.lines != "all":
tty.die("Invalid number for --lines: %s" % args.lines)
nlines = -1
# allow comma-separated list of fields
sortby = ["time"]
if args.sorted_profile:
sortby = args.sorted_profile.split(",")
for stat in sortby:
if stat not in stat_names:
tty.die("Invalid sort field: %s" % stat)
try:
# make a profiler and run the code.
pr = cProfile.Profile()
pr.enable()
return _invoke_command(command, parser, args, unknown_args)
finally:
pr.disable()
# print out profile stats.
stats = pstats.Stats(pr, stream=sys.stderr)
stats.sort_stats(*sortby)
stats.print_stats(nlines)
@llnl.util.lang.memoized
def _compatible_sys_types():
"""Return a list of all the platform-os-target tuples compatible
with the current host.
"""
host_platform = spack.platforms.host()
host_os = str(host_platform.operating_system("default_os"))
host_target = archspec.cpu.host()
compatible_targets = [host_target] + host_target.ancestors
compatible_archs = [
str(spack.spec.ArchSpec((str(host_platform), host_os, str(target))))
for target in compatible_targets
]
return compatible_archs
[docs]
def print_setup_info(*info):
"""Print basic information needed by setup-env.[c]sh.
Args:
info (list): list of things to print: comma-separated list
of 'csh', 'sh', or 'modules'
This is in ``main.py`` to make it fast; the setup scripts need to
invoke spack in login scripts, and it needs to be quick.
"""
shell = "csh" if "csh" in info else "sh"
def shell_set(var, value):
if shell == "sh":
print("%s='%s'" % (var, value))
elif shell == "csh":
print("set %s = '%s'" % (var, value))
else:
tty.die("shell must be sh or csh")
# print sys type
shell_set("_sp_sys_type", str(spack.spec.ArchSpec.default_arch()))
shell_set("_sp_compatible_sys_types", ":".join(_compatible_sys_types()))
# print roots for all module systems
module_to_roots = {"tcl": list(), "lmod": list()}
for name in module_to_roots.keys():
path = spack.modules.common.root_path(name, "default")
module_to_roots[name].append(path)
other_spack_instances = spack.config.get("upstreams") or {}
for install_properties in other_spack_instances.values():
upstream_module_roots = install_properties.get("modules", {})
upstream_module_roots = dict(
(k, v) for k, v in upstream_module_roots.items() if k in module_to_roots
)
for module_type, root in upstream_module_roots.items():
module_to_roots[module_type].append(root)
for name, paths in module_to_roots.items():
# Environment setup prepends paths, so the order is reversed here to
# preserve the intended priority: the modules of the local Spack
# instance are the highest-precedence.
roots_val = ":".join(reversed(paths))
shell_set("_sp_%s_roots" % name, roots_val)
# print environment module system if available. This can be expensive
# on clusters, so skip it if not needed.
if "modules" in info:
generic_arch = archspec.cpu.host().family
module_spec = "environment-modules target={0}".format(generic_arch)
specs = spack.store.STORE.db.query(module_spec)
if specs:
shell_set("_sp_module_prefix", specs[-1].prefix)
else:
shell_set("_sp_module_prefix", "not_installed")
[docs]
def restore_macos_dyld_vars():
"""
Spack mutates DYLD_* variables in `spack load` and `spack env activate`.
Unlike Linux, macOS SIP clears these variables in new processes, meaning
that os.environ["DYLD_*"] in our Python process is not the same as the user's
shell. Therefore, we store the user's DYLD_* variables in SPACK_DYLD_* and
restore them here.
"""
if not sys.platform == "darwin":
return
for dyld_var in ("DYLD_LIBRARY_PATH", "DYLD_FALLBACK_LIBRARY_PATH"):
stored_var_name = f"SPACK_{dyld_var}"
if stored_var_name in os.environ:
os.environ[dyld_var] = os.environ[stored_var_name]
[docs]
def resolve_alias(cmd_name: str, cmd: List[str]) -> Tuple[str, List[str]]:
"""Resolves aliases in the given command.
Args:
cmd_name: command name.
cmd: command line arguments.
Returns:
new command name and arguments.
"""
all_commands = spack.cmd.all_commands()
aliases = spack.config.get("config:aliases")
if aliases:
for key, value in aliases.items():
if " " in key:
tty.warn(
f"Alias '{key}' (mapping to '{value}') contains a space"
", which is not supported."
)
if key in all_commands:
tty.warn(
f"Alias '{key}' (mapping to '{value}') attempts to override"
" built-in command."
)
if cmd_name not in all_commands:
alias = None
if aliases:
alias = aliases.get(cmd_name)
if alias is not None:
alias_parts = shlex.split(alias)
cmd_name = alias_parts[0]
cmd = alias_parts + cmd[1:]
return cmd_name, cmd
def _main(argv=None):
"""Logic for the main entry point for the Spack command.
``main()`` calls ``_main()`` and catches any errors that emerge.
``_main()`` handles:
1. Parsing arguments;
2. Setting up configuration; and
3. Finding and executing a Spack command.
Args:
argv (list or None): command line arguments, NOT including
the executable name. If None, parses from ``sys.argv``.
"""
# ------------------------------------------------------------------------
# main() is tricky to get right, so be careful where you put things.
#
# Things in this first part of `main()` should *not* require any
# configuration. This doesn't include much -- setting up th parser,
# restoring some key environment variables, very simple CLI options, etc.
# ------------------------------------------------------------------------
# Create a parser with a simple positional argument first. We'll
# lazily load the subcommand(s) we need later. This allows us to
# avoid loading all the modules from spack.cmd when we don't need
# them, which reduces startup latency.
parser = make_argument_parser()
parser.add_argument("command", nargs=argparse.REMAINDER)
args, unknown = parser.parse_known_args(argv)
# Just print help and exit if run with no arguments at all
no_args = (len(sys.argv) == 1) if argv is None else (len(argv) == 0)
if no_args:
parser.print_help()
return 1
# version is special as it does not require a command or loading and additional infrastructure
if args.version:
print(get_version())
return 0
# ------------------------------------------------------------------------
# This part of the `main()` sets up Spack's configuration.
#
# We set command line options (like --debug), then command line config
# scopes, then environment configuration here.
# ------------------------------------------------------------------------
# Make spack load / env activate work on macOS
restore_macos_dyld_vars()
# make spack.config aware of any command line configuration scopes
if args.config_scopes:
spack.config.COMMAND_LINE_SCOPES = args.config_scopes
# ensure options on spack command come before everything
setup_main_options(args)
# activate an environment if one was specified on the command line
env_format_error = None
if not args.no_env:
try:
env = spack.cmd.find_environment(args)
if env:
ev.activate(env, args.use_env_repo)
except spack.config.ConfigFormatError as e:
# print the context but delay this exception so that commands like
# `spack config edit` can still work with a bad environment.
e.print_context()
env_format_error = e
# ------------------------------------------------------------------------
# Things that require configuration should go below here
# ------------------------------------------------------------------------
if args.print_shell_vars:
print_setup_info(*args.print_shell_vars.split(","))
return 0
# -h and -H are special as they do not require a command, but
# all the other options do nothing without a command.
if args.help:
sys.stdout.write(parser.format_help(level=args.help))
return 0
# At this point we've considered all the options to spack itself, so we
# need a command or we're done.
if not args.command:
parser.print_help()
return 1
# Try to load the particular command the caller asked for.
cmd_name = args.command[0]
cmd_name, args.command = resolve_alias(cmd_name, args.command)
# set up a bootstrap context, if asked.
# bootstrap context needs to include parsing the command, b/c things
# like `ConstraintAction` and `ConfigSetAction` happen at parse time.
bootstrap_context = llnl.util.lang.nullcontext()
if args.bootstrap:
import spack.bootstrap as bootstrap # avoid circular imports
bootstrap_context = bootstrap.ensure_bootstrap_configuration()
with bootstrap_context:
return finish_parse_and_run(parser, cmd_name, args, env_format_error)
[docs]
def finish_parse_and_run(parser, cmd_name, main_args, env_format_error):
"""Finish parsing after we know the command to run."""
# add the found command to the parser and re-run then re-parse
command = parser.add_command(cmd_name)
args, unknown = parser.parse_known_args(main_args.command)
# we need to inherit verbose since the install command checks for it
args.verbose = main_args.verbose
# Now that we know what command this is and what its args are, determine
# whether we can continue with a bad environment and raise if not.
if env_format_error:
subcommand = getattr(args, "config_command", None)
if (cmd_name, subcommand) != ("config", "edit"):
raise env_format_error
# many operations will fail without a working directory.
set_working_dir()
# now we can actually execute the command.
if main_args.spack_profile or main_args.sorted_profile:
_profile_wrapper(command, parser, args, unknown)
elif main_args.pdb:
import pdb
pdb.runctx("_invoke_command(command, parser, args, unknown)", globals(), locals())
return 0
else:
return _invoke_command(command, parser, args, unknown)
[docs]
def main(argv=None):
"""This is the entry point for the Spack command.
``main()`` itself is just an error handler -- it handles errors for
everything in Spack that makes it to the top level.
The logic is all in ``_main()``.
Args:
argv (list or None): command line arguments, NOT including
the executable name. If None, parses from sys.argv.
"""
try:
return _main(argv)
except SpackError as e:
tty.debug(e)
e.die() # gracefully die on any SpackErrors
except KeyboardInterrupt:
if spack.config.get("config:debug") or SHOW_BACKTRACE:
raise
sys.stderr.write("\n")
tty.error("Keyboard interrupt.")
return signal.SIGINT.value
except SystemExit as e:
if spack.config.get("config:debug") or SHOW_BACKTRACE:
traceback.print_exc()
return e.code
except Exception as e:
if spack.config.get("config:debug") or SHOW_BACKTRACE:
raise
tty.error(e)
return 3
[docs]
class SpackCommandError(Exception):
"""Raised when SpackCommand execution fails."""