Spdk/scripts/ar-xnvme-fixer

#!/usr/bin/env bash
#  SPDX-License-Identifier: BSD-3-Clause
#  Copyright (C) 2022 Intel Corporation
#  All rights reserved.

# The xnvme build executes library_bundler.py which wraps itself around ar
# to create libxnvme.a. It builds a set of MRI commands which then is
# passed to ar via stdin. The set of members is declared via ADDLIB
# followed by an absolute path to the file. On the physical nodes this
# path may look as the following:
#
#   /workspace/foo-job@tmp/...
#
# The '@' has a special meaning for ar when spotted on the cmdline.
# It ends up splitting the path into /workspace/foo-job treating it
# as a member path which doesn't exist. This causes the entire build
# to fail. To workaround this, we inject ourselves via AR_TOOL and
# modify the MRI commands such that the absolute paths to members are
# replaced with relative ones (relative to xnvme/builddir from where
# the library_bundler.py is executed).

curdir=$(readlink -f "$(dirname "$0")")
rootdir=$(readlink -f "$curdir/../")

[[ ! -t 0 ]] || exit 1

while read -r cmd arg; do
	if [[ $cmd == ADDLIB && $arg == /* ]]; then
		arg=${arg/"$rootdir/xnvme/"/"../"}
	fi
	mri+=("$cmd${arg:+ $arg}")
done

ar "$@" < <(printf '%s\n' "${mri[@]}")