#! /bin/sh

# parse --prefix=PREFIX, mainly for GuixSD/Debian
cmdline=$(echo "$@")
PREFIX=${cmdline##*--prefix=}
PREFIX=${PREFIX% *}
PREFIX=${PREFIX% -*}
if [ -z "$PREFIX" ]; then
   PREFIX=/usr/local
fi

GUILE=$(command -v guile)
GUILE_TOOLS=$(command -v guile-tools)
GUILE_SITE_DIR=$PREFIX/share/guile/site/$GUILE_EFFECTIVE_VERSION
GUILE_SITE_CCACHE_DIR=$PREFIX/lib/guile/$GUILE_EFFECTIVE_VERSION/site-ccache
GUILE_EFFECTIVE_VERSION=$(guile -c '(display (effective-version))')

sed \
    -e s,@GUILE@,$GUILE,\
    -e s,@GUILE_SITE_DIR@,$GUILE_SITE_DIR,\
    -e s,@GUILE_SITE_CCACHE_DIR@,$GUILE_SITE_CCACHE_DIR,\
    bin/gash.in > bin/gash
chmod +x bin/gash
cat > .config.make <<EOF
GUILE=$GUILE
GUILE_TOOLS=$GUILE_TOOLS
PREFIX=$PREFIX
BINDIR=$PREFIX/bin
DOCDIR=$PREFIX/share/doc/gash
GUILE_EFFECTIVE_VERSION=$GUILE_EFFECTIVE_VERSION
GUILE_SITE_DIR=$GUILE_SITE_DIR
GUILE_SITE_CCACHE_DIR=$GUILE_SITE_CCACHE_DIR
EOF

cat <<EOF
Run:
  make            to build gash
  make help       for help on other targets
EOF