def build_argparser():
common_args = argparse.ArgumentParser(add_help=False)
common_args.add_argument(
"--scratch-path", help="Where to maintain checkouts and build dirs"
)
common_args.add_argument(
"--install-prefix",
help=(
"Where the final build products will be installed "
"(default is [scratch-path]/installed)"
),
)
common_args.add_argument(
"--num-jobs",
type=int,
help=(
"Number of concurrent jobs to use while building. "
"(default=number of cpu cores)"
),
)
common_args.add_argument(
"--use-shipit",
help="use the real ShipIt instead of the simple shipit transformer",
action="store_true",
default=False,
)
common_args.add_argument(
"--facebook-internal",
help="Setup the build context as an FB internal build",
action="store_true",
default=False,
)
ap = argparse.ArgumentParser(
description="Get and build dependencies and projects", parents=[common_args]
)
sub = ap.add_subparsers(
# metavar suppresses the long and ugly default list of subcommands on a
# single line. We still render the nicer list below where we would
# have shown the nasty one.
metavar="",
title="Available commands",
help="",
)
add_subcommands(sub, common_args)
return ap
def parse_args():
# We want to allow common arguments to be specified either before or after
# the subcommand name. In order to do this we add them to the main parser
# and to subcommand parsers. In order for this to work, we need to tell
# argparse that the default value is SUPPRESS, so that the default values
# from the subparser arguments won't override values set by the user from
# the main parser. We maintain our own list of desired defaults in the
# common_defaults dictionary, and manually set those if the argument wasn't
# present at all.
common_args = argparse.ArgumentParser(add_help=False)
common_defaults = {}
def add_common_arg(*args, **kwargs):
var_name = get_arg_var_name(args)
default_value = kwargs.pop("default", None)
common_defaults[var_name] = default_value
kwargs["default"] = argparse.SUPPRESS
common_args.add_argument(*args, **kwargs)
add_common_arg("--scratch-path",
help="Where to maintain checkouts and build dirs")
add_common_arg("--vcvars-path",
default=None,
help="Path to the vcvarsall.bat on Windows.")
add_common_arg(
"--install-prefix",
help=("Where the final build products will be installed "
"(default is [scratch-path]/installed)"),
)
add_common_arg(
"--num-jobs",
type=int,
help=("Number of concurrent jobs to use while building. "
"(default=number of cpu cores)"),
)
add_common_arg(
"--use-shipit",
help="use the real ShipIt instead of the simple shipit transformer",
action="store_true",
default=False,
)
add_common_arg(
"--facebook-internal",
help="Setup the build context as an FB internal build",
action="store_true",
default=None,
)
add_common_arg(
"--no-facebook-internal",
help=
"Perform a non-FB internal build, even when in an fbsource repository",
action="store_false",
dest="facebook_internal",
)
add_common_arg(
"--allow-system-packages",
help="Allow satisfying third party deps from installed system packages",
action="store_true",
default=False,
)
ap = argparse.ArgumentParser(
description="Get and build dependencies and projects",
parents=[common_args])
sub = ap.add_subparsers(
# metavar suppresses the long and ugly default list of subcommands on a
# single line. We still render the nicer list below where we would
# have shown the nasty one.
metavar="",
title="Available commands",
help="",
)
add_subcommands(sub, common_args)
args = ap.parse_args()
for var_name, default_value in common_defaults.items():
if not hasattr(args, var_name):
setattr(args, var_name, default_value)
return ap, args
