#!/bin/sh

# vars
PREFIX="$1"
SEED_NAME="$2"
PKG_DIR="debian"
CONTROL_FILE="${PKG_DIR}/control"

# funcs
get_template(){
   TEMPLATE="${PKG_DIR}/${1}.${PREFIX}-${2}.in"
   if [ ! -r "$TEMPLATE" ] ; then
      TEMPLATE="${PKG_DIR}/${1}.${PREFIX}.in"
   fi
   echo "$TEMPLATE"
}

expand_template(){
   sed -e "s%_@_SEED_@_%${SEED_NAME}%g" "$1"
}

# test
[ -z "$PREFIX" -o -z "$SEED_NAME" ] && exit 0
[ -f "$CONTROL_FILE" ] || exit 0

# generate control
TEMPLATE="$(get_template "control" "$SEED_NAME")"
[ -f "$TEMPLATE" ] || exit 0
TMP_FILE="$(tempfile)"
echo "" > "$TMP_FILE"
expand_template "$TEMPLATE" >> "$TMP_FILE"

# skip if package exists in control
PKG_NAME_LINE="$(sed -ne "/^Package:/p" "$TMP_FILE" |head -1)"
if ! grep -q "^${PKG_NAME_LINE}$" "$CONTROL_FILE" ; then
   cat "$TMP_FILE" >> "$CONTROL_FILE"
fi
rm -f "$TMP_FILE"

# generate scripts
for s in postinst preinst postrm prerm ; do
   TEMPLATE="$(get_template "$s" "$SEED_NAME")"
   if [ -r "$TEMPLATE" ] ; then
      SCRIPT_FILE="${PKG_DIR}/lliurex-${PREFIX}-${SEED_NAME}.${s}"
      # skip if SCRIPT_FILE exists
      if [ ! -f "$SCRIPT_FILE" ] ; then 
         expand_template "$TEMPLATE" > "$SCRIPT_FILE"
         chmod +x "$SCRIPT_FILE"
      fi
   fi
done

exit 0