update godns: Script to check if godns version is the same as the newest release, if not, then download and install the release.

upgrade_godns.sh

#!/usr/bin/env bash

function upgrade_godns() {
  PROFILE="TimothyYe"
  PROJECT="godns"
  OUTFILE="godns.tar.gz"
  ENDFILE="godns"
     
  VERSION=$(curl -s "https://api.github.com/repos/$PROFILE/$PROJECT/releases/latest" | \grep -Po '"tag_name": *"v\K[^"]*')
  
  GDNSVERS=$(godns -h 2>/dev/null) 
  LOVERS=$(echo "$GDNSVERS" | grep GoDNS | cut -d ' ' -f 2 | cut -c 2-)

  if [[ "$VERSION" != "$LOVERS" ]]; then
    DFILE="${PROJECT}_${VERSION}_linux_amd64.tar.gz"
    TMPDIR=$(mktemp -d)
  
    cd "$TMPDIR" || exit
    curl -Lo "$OUTFILE" "https://github.com/$PROFILE/$PROJECT/releases/download/v$VERSION/$DFILE"
    tar xf $OUTFILE $ENDFILE
     
    sudo install $ENDFILE -D -t /usr/local/bin/
  else
    echo "GoDNS versions are the same."
  fi
}
upgrade_godns