#!/bin/sh
# srctree.sh: support for out-of-tree builds in posix make mode.
# this file is covered by COPYING.SOFORT.
set -eu
usage()
{
cat << EOF >&2
Usage:
--help show this HELP message
--srctree=SRCTREE set source directory
EOF
exit 1
}
# one
workdir=$(pwd -P)
srctree=
argloop=
for arg ; do
case "$arg" in
--help)
usage
;;
--srctree=*)
srctree=${arg#*=}
;;
--)
argloop='done'
;;
*)
if [ -z "$argloop" ]; then
printf 'Invalid option: %s\n' "$arg" >&2
usage
fi
;;
esac
done
# two
if [ -z "$srctree" ] ; then
usage
fi
cd -- "$srctree"
srctree=$(pwd -P)
cd -- "$workdir"
if [ "$srctree" = "$workdir" ]; then
exit 0
fi
# three
for arg ; do
case "$arg" in
--srctree=*)
;;
--)
;;
*)
stat "$arg" > /dev/null 2>&1 \
|| ln -s -- "$srctree/$arg" "$arg"
;;
esac
done
# all done
exit 0