#!/usr/bin/env bash
# a simple install script for ctop

KERNEL=$(uname -s)

# extract github download url matching pattern
function extract_url() {
  match=$1; shift
  echo "$@" | while read line; do
    case $line in
      *browser_download_url*${match}*)
        url=$(echo $line | sed -e 's/^.*"browser_download_url":[ ]*"//' -e 's/".*//;s/\ //g')
        echo $url
        break
      ;;
    esac
  done
}

case $KERNEL in
  Linux) MATCH_BUILD="linux-amd64" ;;
  Darwin) MATCH_BUILD="darwin-amd64" ;;
  *)
    echo "platform not supported by this install script"
    exit 1
    ;;
esac

echo "fetching latest release info"
resp=$(curl -s https://api.github.com/repos/bcicen/ctop/releases/latest)

#TODO add checksum validation
#echo "fetching release checksums"
#checksum_url=$(extract_url sha256sums.txt "$resp")
#wget -q $checksum_url

echo "fetching latest ctop"
url=$(extract_url $MATCH_BUILD "$resp")
wget -q --show-progress $url -O ctop

echo "installing to /usr/local/bin"
chmod +x ctop
sudo mv -v ctop /usr/local/bin/ctop

echo "done"