ethdo.sh

#!/bin/bash

# Variables
GITHUB_URL=https://api.github.com/repos/wealdtech/ethdo/releases/latest
GITHUB_RELEASE_NODES=https://github.com/wealdtech/ethdo/releases
RELEASE_SUFFIX="linux-amd64.tar.gz$"
DESCRIPTION="A command-line tool for managing common tasks in Ethereum"
DOCUMENTATION=https://github.com/wealdtech/ethdo/blob/master/docs/howto.md
SOURCE_CODE=https://github.com/wealdtech/ethdo
APP_NAME=ethdo
VERSION=v$(ethdo version)

# Asks to update
function upgradeBinaries() {
  getLatestVersion
  if whiptail --title "Update $APP_NAME" --yesno "Installed Version is:       $VERSION\nLatest Version of $APP_NAME is: $TAG\n\nReminder: Always read the release notes for breaking changes: $GITHUB_RELEASE_NODES\n\nDo you want to update to $TAG?" 10 78; then
    downloadClient
  fi
}

# Gets latest tag
function getLatestVersion() {
  TAG=$(curl -s $GITHUB_URL | jq -r .tag_name)
}

# Downloads latest release
function downloadClient() {
  BINARIES_URL="$(curl -s $GITHUB_URL | jq -r ".assets[] | select(.name) | .browser_download_url" | grep ${RELEASE_SUFFIX})"
  echo Downloading URL: $BINARIES_URL
  cd $HOME
  # Download
  wget -O $APP_NAME.tar.gz $BINARIES_URL
  # Untar
  tar -xzvf $APP_NAME.tar.gz -C $HOME
  # Cleanup
  rm $APP_NAME.tar.gz
  # Install binary
  sudo mv $HOME/$APP_NAME /usr/local/bin
}

# Uninstall
function removeAll() {
  if whiptail --title "Uninstall $APP_NAME" --defaultno --yesno "Are you sure you want to remove $APP_NAME" 9 78; then
    sudo rm /usr/local/bin/$APP_NAME
    whiptail --title "Uninstall finished" --msgbox "You have uninstalled $APP_NAME." 8 78
  fi
}

# Displays usage info
function usage() {
  cat <<EOF
Usage: $(basename "$0") [-i] [-u] [-r]

$APP_NAME Helper Script

Options)
-i    Install $APP_NAME binary
-u    Upgrade $APP_NAME
-r    Remove $APP_NAME
-h    Display help

About $APP_NAME)
- $DESCRIPTION
- Source code: $SOURCE_CODE
- Documentation: $DOCUMENTATION
EOF
}

# Process command line options
while getopts :iurh opt; do
  case ${opt} in
  i) downloadClient ;;
  u) upgradeBinaries ;;
  r) removeAll ;;
  h)
    usage
    exit 0
    ;;
  \?)
    echo "Invalid option: -${OPTARG}" >&2
    usage
    exit 1
    ;;
  :)
    echo "Option -${OPTARG} requires an argument." >&2
    usage
    exit 1
    ;;
  esac
done