lokinet/lokinet-bootstrap

#!/usr/bin/env bash
# this shell script will be replaced by a proper program in the future (probably)
#
# from https://stackoverflow.com/questions/5947742/how-to-change-the-output-color-of-echo-in-linux
RED='\033[0;31m'
GREEN='\033[0;32m'
NC='\033[0m' # No Color

set -e

helpme=
default_mainnet=https://seed.lokinet.org/lokinet.signed
default_testnet=https://seed.lokinet.org/testnet.signed
default_dest="$HOME/.lokinet/bootstrap.signed"

if [ "$#" -gt 2 ]; then
  helpme=y
fi

if [ -z "$1" ] || [ "$1" == "mainnet" ] || [ "$1" == "lokinet" ]; then
  url="${default_mainnet}"
elif [ "$1" == "testnet" ]; then
  url="${default_testnet}"
elif [[ "$1" = -* ]]; then
  helpme=y
else
  url="$1"
fi

if [[ "$2" = -* ]]; then
  helpme=y
elif [ -n "$2" ]; then
  dest="$2"
else
  dest="$default_dest"
fi

if [ -n "$helpme" ]; then
  echo "Usage: $0 [URL [DEST]] -- download bootstrap file from URL (default: lokinet) and save to DEST (default: $default_dest)."
  echo "URL can be a full URL, or else 'lokinet' or 'testnet' to use the default lokinet/testnet seed URL.  'mainnet' can be used"
  echo "as an alias for 'lokinet'."
  exit 1
fi

destdir="$(dirname $dest)"
if [ ! -d "$destdir" ]; then
  mkdir "$destdir"
fi

echo "downloading $url"

# use temp file to not overrwrite existing bootstrap file on fail
#tmp=mktemp
tmp=/tmp/bootstrap.tmp

# MacOS does not have wget without homebrew but does have curl
# Rick also had indicated most BSDs have curl too
if curl -fsSL "$url" >"$tmp"; then
  mv "$tmp" "$dest"
  echo -e "${GREEN}lokinet successfully bootstrapped${NC}"
else
  echo -e "${RED}failed to download bootstrap from $url${NC}"
  rm -f "$tmp"
  exit 1
fi