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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 sys
from llnl.util.tty.color import colorize
description = "get help on spack and its commands"
section = "help"
level = "short"
#
# These are longer guides on particular aspects of Spack. Currently there
# is only one on spec syntax.
#
spec_guide = """\
spec expression syntax:
package [constraints] [^dependency [constraints] ...]
package any package from 'spack list', or
@K{/hash} unique prefix or full hash of
installed package
constraints:
versions:
@c{@version} single version
@c{@min:max} version range (inclusive)
@c{@min:} version <min> or higher
@c{@:max} up to version <max> (inclusive)
compilers:
@g{%compiler} build with <compiler>
@g{%compiler@version} build with specific compiler version
@g{%compiler@min:max} specific version range (see above)
compiler flags:
@g{cflags="flags"} cppflags, cflags, cxxflags,
fflags, ldflags, ldlibs
@g{==} propagate flags to package dependencies
variants:
@B{+variant} enable <variant>
@r{-variant} or @r{~variant} disable <variant>
@B{variant=value} set non-boolean <variant> to <value>
@B{variant=value1,value2,value3} set multi-value <variant> values
@B{++}, @r{--}, @r{~~}, @B{==} propagate variants to package dependencies
architecture variants:
@m{platform=platform} linux, darwin, cray, etc.
@m{os=operating_system} specific <operating_system>
@m{target=target} specific <target> processor
@m{arch=platform-os-target} shortcut for all three above
cross-compiling:
@m{os=backend} or @m{os=be} build for compute node (backend)
@m{os=frontend} or @m{os=fe} build for login node (frontend)
dependencies:
^dependency [constraints] specify constraints on dependencies
^@K{/hash} build with a specific installed
dependency
examples:
hdf5 any hdf5 configuration
hdf5 @c{@1.10.1} hdf5 version 1.10.1
hdf5 @c{@1.8:} hdf5 1.8 or higher
hdf5 @c{@1.8:} @g{%gcc} hdf5 1.8 or higher built with gcc
hdf5 @B{+mpi} hdf5 with mpi enabled
hdf5 @r{~mpi} hdf5 with mpi disabled
hdf5 @B{++mpi} hdf5 with mpi enabled and propagates
hdf5 @r{~~mpi} hdf5 with mpi disabled and propagates
hdf5 @B{+mpi} ^mpich hdf5 with mpi, using mpich
hdf5 @B{+mpi} ^openmpi@c{@1.7} hdf5 with mpi, using openmpi 1.7
boxlib @B{dim=2} boxlib built for 2 dimensions
libdwarf @g{%intel} ^libelf@g{%gcc}
libdwarf, built with intel compiler, linked to libelf built with gcc
mvapich2 @g{%pgi} @B{fabrics=psm,mrail,sock}
mvapich2, built with pgi compiler, with support for multiple fabrics
"""
guides = {"spec": spec_guide}
def setup_parser(subparser):
help_cmd_group = subparser.add_mutually_exclusive_group()
help_cmd_group.add_argument(
"help_command", nargs="?", default=None, help="command to get help on"
)
help_all_group = subparser.add_mutually_exclusive_group()
help_all_group.add_argument(
"-a",
"--all",
action="store_const",
const="long",
default="short",
help="list all available commands and options",
)
help_spec_group = subparser.add_mutually_exclusive_group()
help_spec_group.add_argument(
"--spec",
action="store_const",
dest="guide",
const="spec",
default=None,
help="help on the package specification syntax",
)
def help(parser, args):
if args.guide:
print(colorize(guides[args.guide]))
return 0
if args.help_command:
parser.add_command(args.help_command)
parser.parse_args([args.help_command, "-h"])
else:
sys.stdout.write(parser.format_help(level=args.all))
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