#!/usr/bin/env bash # exit from script if error was raised. set -e # error function is used within a bash function in order to send the error # message directly to the stderr output and exit. error() { echo "$1" > /dev/stderr exit 0 } # return is used within bash function in order to return the value. return() { echo "$1" } # set_default function gives the ability to move the setting of default # env variable from docker file to the script thereby giving the ability to the # user override it durin container start. set_default() { # docker initialized env variables with blank string and we can't just # use -z flag as usually. BLANK_STRING='""' VARIABLE="$1" DEFAULT="$2" if [[ -z "$VARIABLE" || "$VARIABLE" == "$BLANK_STRING" ]]; then if [ -z "$DEFAULT" ]; then error "You should specify default variable" else VARIABLE="$DEFAULT" fi fi return "$VARIABLE" } # Set default variables if needed. RPCUSER=$(set_default "$RPCUSER" "devuser") RPCPASS=$(set_default "$RPCPASS" "devpass") DEBUG=$(set_default "$DEBUG" "info") NETWORK=$(set_default "$NETWORK" "simnet") PARAMS=$(echo \ "--$NETWORK" \ "--debuglevel=$DEBUG" \ "--rpcuser=$RPCUSER" \ "--rpcpass=$RPCPASS" \ "--datadir=/data" \ "--logdir=/data" \ "--rpccert=/rpc/rpc.cert" \ "--rpckey=/rpc/rpc.key" \ "--rpclisten=0.0.0.0" \ "--txindex" ) # Set the mining flag only if address is non empty. if [[ -n "$MINING_ADDRESS" ]]; then PARAMS="$PARAMS --miningaddr=$MINING_ADDRESS" fi # Add user parameters to command. PARAMS="$PARAMS $@" # Print command and start bitcoin node. echo "Command: ltcd $PARAMS" exec ltcd $PARAMS