[IMP] Launch script: help to use another configuration file to launch

multiple instance with different configuration of Gissmo

launch.sh

@@ -15,7 +15,10 @@ POSTGRES_VERSION="9.5"
 GISSMO_DOCKER_NAME="gissmo"
 
 ## User
+if test -z "$GISSMO_CFG"; then
+  # No Gissmo Launcher configuration file given. Search one.
   CONFIG_FILENAME="config"
+  # first in XDG directory, otherwise ~/.config one.
   if test -z $XDG_CONFIG_HOME; then
     CONFIG_DEFAULT_DIR="${HOME}/.config/gissmo"
   else
@@ -29,6 +32,14 @@ if ! test -f ${CONFIG_FILE}; then
       exit 1
     fi
   fi
+else
+  # Gissmo Launcher configuration file is given! Check it.
+  CONFIG_FILE=$GISSMO_CFG
+  if ! test -f $CONFIG_FILE; then
+    echo "Configuration file not found: ${CONFIG_FILE}"
+    exit 1
+  fi
+fi
 . ${CONFIG_FILE} || exit 1
 
 ## Composed
@@ -89,6 +100,10 @@ show_help() {
   echo -e "    $PROGRAM stop"
   echo -e "    $PROGRAM start python manage.py shell"
   echo -e "    $PROGRAM stop"
+  echo ""
+  echo -e "If GISSMO_CFG used, you can specify another configuration file. Example:"
+  echo ""
+  echo -e "    GISSMO_CFG=~/new_config $PROGRAM"
   # TODO: Add clean() command to STOP and DELETE Gissmo Docker container
   # TODO: Add clean_db() command to STOP and DELETE postgreSQL Docker container
   # TODO: Add clean_all() command that makes clean() and clean_db()