Script to create an inventory of installed brews, casks and taps for Homebrew as Markdown file. Requires an installation of jq (https://stedolan.github.io/jq/)

brew_inventory.sh

#!/usr/bin/env bash
if [ $# -eq 1 ]; then
    file=$1
else
    file=brew_inventory.md
fi

cat << EOF >$file  
# Brew Inventory

Inventory created at: $(date)

## Brews

EOF

brew info --json=v1 $(brew list -1) | jq -r '.[] | select(.installed[0].installed_as_dependency == false) | "- [ ] " + .name + ": " + .desc?'  >> $file

cat << EOF >>$file 

## Casks

EOF

for c in $(brew cask list -1); do
    echo -n "- [ ] $c: " >> $file
    info=$(brew cask info --json=v1 $c 2>/dev/null)
    # Some casks fail to produce the JSON output. See https://github.com/Homebrew/homebrew-cask/issues/52427
    if [ $? -ne 0 ]; then
        echo "(failed to read homepage information)" >>$file
    else
        echo $info | jq -r '.[].homepage' 2>/dev/null >>$file
    fi
done

cat << EOF >>$file 

## Installed taps

EOF

for t in $(brew tap 2>/dev/null); do
    echo "- $t" >> $file
done