Reinstall all home brew packages

brew_reinstall_all.sh

#!/bin/bash
 
# Reinstall all brew packages and dependencies in the correct order 
# - list all installed packages
# - print the package followed by its dependencies
# - print the package and a single depenency on each line
# - perform a topographical sort
# - print out each package in the correct order on a single line
# - pass to brew reinstall
brew list \
  | while read package; do echo -n "$package "; echo $(brew deps $package); done \
  | awk 'NF == 1 {print $1, $1} NF > 1 {for (dep=1; dep<=NF; dep++) print $1, $dep}' \
  | tsort \
  | REINSTALL_LIST=$(while read package; do echo -n "$package "; done) \
  | brew reinstall $REINSTALL_LIST