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#!/bin/bash
set -e
# The location of the br2-external tree, once validated.
declare BR2_EXT
main() {
local OPT OPTARG
local br2_ext ofile
while getopts :ho: OPT; do
case "${OPT}" in
h) help; exit 0;;
o) ofile="${OPTARG}";;
:) error "option '%s' expects a mandatory argument\n" "${OPTARG}";;
\?) error "unknown option '%s'\n" "${OPTARG}";;
esac
done
# Forget options; keep only positional args
shift $((OPTIND-1))
if [ ${#} -ne 1 ]; then
error "need exactly one br2-external tree to be specified\n"
fi
br2_ext="${1}"
if [ -z "${ofile}" ]; then
error "no output file specified (-o)\n"
fi
do_validate "${br2_ext}"
do_kconfig >"${ofile}"
}
# Validates the br2-external tree passed as argument. Makes it cannonical
# and store it in global variable BR2_EXT.
do_validate() {
local br2_ext="${1}"
if [ ! -d "${br2_ext}" ]; then
error "'%s': no such file or directory\n" "${br2_ext}"
fi
if [ ! -r "${br2_ext}" -o ! -x "${br2_ext}" ]; then
error "'%s': permission denied\n" "${br2_ext}"
fi
BR2_EXT="$(cd "${br2_ext}"; pwd -P )"
}
# Generate the kconfig snippet for the br2-external tree.
do_kconfig() {
printf '#\n# Automatically generated file; DO NOT EDIT.\n#\n'
printf '\n'
printf 'config BR2_EXTERNAL\n'
printf '\tstring\n'
printf '\tdefault "%s"\n' "${BR2_EXT}"
printf '\n'
printf 'menu "User-provided options"\n'
printf '\tdepends on BR2_EXTERNAL != "support/dummy-external"\n'
printf '\n'
printf 'source "%s/Config.in"\n' "${BR2_EXT}"
printf '\n'
printf "endmenu # User-provided options\n"
}
help() {
cat <<-_EOF_
Usage:
${my_name} -o FILE PATH
${my_name} generates the kconfig snippet to include the configuration
options specified in the br2-external tree passed as positional argument.
Options:
-o FILE
FILE in which to generate the kconfig snippet.
Returns:
0 If no error
!0 If any error
_EOF_
}
error() { local fmt="${1}"; shift; printf "%s: ${fmt}" "${my_name}" "${@}" >&2; exit 1; }
my_name="${0##*/}"
main "${@}"
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