lnd/docker/btcd/start-btcctl.sh

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#!/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 "$RPCPASS" "devpass")
NETWORK=$(set_default "$NETWORK" "simnet")
btcctl \
"--$NETWORK" \
--rpccert="/rpc/rpc.cert" \
--rpcuser="$RPCUSER" \
--rpcpass="$RPCPASS" \
--rpcserver="rpcserver" \
"$@"