The..brew

brewcaskupgrade.sh

#!/usr/bin/env bash
# Description:
#  POC around brew cask. The poor-man's missing ' brew cask upgrade' switch o/
# Notes:
#  [..] One brew to rule them all:
# uberbrew () { brew -v update; brew upgrade; brew cleanup; brewcaskupgrade.sh upgrade
# brew cask cleanup ; }
# Author: ment4t
# Revision: 0.2


#expecting the unexpected
set -o pipefail
set -o errexit
set -o nounset
set -o errtrace

# how to handle casks with version "latest" by default
update_latest=0  # 1 to update ; 0 to skip

usage() {  # usage funtion
  cat>&2<<-EOF
  Description:

  Either:
    1) check if locally installed casks need upgrading
    2) upgrade old stuff

    Usage: ${0##/*/} [-a|--all] [-v|--verbose] action

    actions:
      check             Check all installed casks for upgrades
      upgrade           Upgrade old casks

    optional arguments:
      -a, --all         Treat "latest" versions as old, ie forced-upgrade mode
      -v, --verbose     Add verbosity
EOF
}

caskVer() {
  unset arr
  local name ver line st
  while read -r line ; do
    if ! [[ ${name:-} ]] ; then
      name=${name-${line%%:*}}
      ver=${ver-${line##*:}} ; ver=${ver# *}
      continue
    fi
    if [[ ${line##*/} =~ $ver ]] ; then  # simple pattern matching for now
      if [[ $ver == "latest" ]] ; then
        if [[ $update_latest -eq 0 ]] ; then st=1 ; break
        elif [[ $update_latest -eq 1 ]] ; then st=2 ; break
        fi
      else st=0 ; break
      fi
    else st=3
    fi
  done < <(brew cask info "$@")
  arr=([0]="$name" [1]="$st" [2]="$ver")
}

checkCasks() {
  while read -r cask ; do
    caskVer "$cask"
    set -- "${arr[@]}"
      case $2 in
        0) echo "$cask OK" ;;
        1) echo "$cask OK [SAME]" ;;
        2) echo "$cask OLD [SAME]" ;;
        3) echo "$cask OLD"
      esac
  done < <(brew cask list)
}

upgradeCasks () {
  unset arrdone
  local arrdone=()
  while read -r cask ; do
    caskVer "$cask"
    set -- "${arr[@]}"
    case $2 in
      2|3) brew cask install --force "$cask"
          arrdone+=("$1 to $3")
      ;;
        *) continue
      esac
  done < <(brew cask list)
  [[ ${arrdone[@]} ]] \
    && printf '[+] Upgraded %s\n' "${arrdone[@]}"\
    || echo '[*] Nothing to upgrade.'
}

for x ; do
  case $x in
    -a|--all) update_latest=1 ; shift  ;;
    -v|--verbose) set -x ; shift  ;;
    check) checkCasks ; exit ;;
    upgrade) upgradeCasks ; exit ;;
    -h|--help) usage ; exit ;;
    ?*) usage ; printf -- >&2 '[!] Error: Unknown option: %s\n' "$1" ; exit 3 ;;
    -?*) usage ; printf -- >&2 '[!] Error: Unknown switch: %s\n' "$1" ; exit 3 ;;
    --) break ; exit
  esac
done

usage