Find recently updated Homebrew formulae

brew-recent.sh

#!/usr/bin/env bash

# https://apple.stackexchange.com/questions/304345/show-installation-date-of-packages-installed-with-homebrew/432218#432218
# https://apple.stackexchange.com/questions/373442/how-to-generate-list-of-homebrew-formulas-packages-sorted-by-most-recently-upda/

#default timeframe
tf=1d

case $1 in
  -h|--help) echo "usage: ${0##*/} [time] e.g. 90m, 1h, 3d (default: $tf)"; exit;;
  '') echo 1>&2 "% using $tf";;
  *) tf=$1
esac

repo=$(brew --repository)
if [ -z $repo ]; then
  echo 1>&2 "% could not determine brew directories"
  exit 1
fi

find "$repo/Library/Taps/homebrew/homebrew-core/Formula" \
  -type f \
  -name '*.rb' \
  -mtime -$tf |
awk 'BEGIN {
  SQ="\047";
  DQ="\042";
  BOLD="\033[1m";
  NORM="\033[0m";
}
{
  c=sprintf("basename %s",$0);
  c | getline f;
  close(c);
  
  sub(".rb$","",f);

  c=sprintf("sed -En %ss/^ +desc %s(.*)%s/\\1/p%s %s",SQ,DQ,DQ,SQ,$0);
  c | getline d;
  close(c);

  printf("%s%s:%s %s\n",BOLD,f,NORM,d);
}'

N.B. revision <3 of this script had a bug, please use v3 or higher.