#! /bin/sh -e
# zypper-build-dep: show my ignorance of zypper/.rpm
# There is surely a better way to install build-deps.

if test $# -eq 0 -o "$1" = '-h' -o "$1" = "--help"; then
    cat 1>&2 <<EOF
Usage: zypper-build-dep [OPTION]... PACKAGE-NAME...

Show build dependencies for PACKAGE-NAMEs

Examples:
  zypper-build-dep lilypond
  sudo zypper install -y \$(zypper-build-dep OpenOffice_org)
EOF
    exit 2
fi

# Huh, install-source eats my .src.rpm?
# srcpmdir=$(rpm --eval %_srcrpmdir)
specdir=$(rpm --eval %_specdir)
specs=$(echo "$@" | sed -e 's/\([^[:space:]]\+\)[[:space:]]*/\1.spec /g')
srpms=
for i in "$@"; do
    if ! test -e $specdir/$i.spec; then
	srpms="$srpms $i";
    fi
done
if test -n "$srpms"; then
    zypper source-install $srpms 1>&2
fi
cd "$specdir" && grep -E '^(BuildRequires|BuildPrereq):' $specs \
    | sed -e 's/[^:]*:[[:space:]]*//' \
    -e 's/[[:space:]]*[<=>]\+[[:space:]][^[:space:]]\+//g' \
    | tr ' ' '\n' \
    | sort -u