produces a dot graph for homebrew dependencies

brew-tree.sh

#!/usr/bin/env bash

#produces a dot graph for homebrew dependencies
#run using `./brew-tree.sh | dot -Tpdf -o brew-tree.pdf`

set -e #exit immediately if a simple command exits with a non-zero status
set -u #treat unset variables as an error when performing parameter expansion
set -o pipefail #exit status of last non-zero exit code is returned

echo "digraph brew {"
echo "  node [shape=Mrecord, fontname=monospace]"
echo "  rankdir=LR"
echo "  overlap=false"
echo "  splines=true"
echo "  layout=dot"
echo

for formula in $(/usr/local/bin/brew list) ; do
    echo "  \"${formula}\""
    #clean names
    for deps in $(/usr/local/bin/brew deps "${formula}") ; do
        echo "  \"${deps}\" [style=filled,fillcolor=\"/accent3/2\"]"
        echo "  \"${formula}\" -> \"${deps}\""
    done
done

#color leaves
for formula in $(/usr/local/bin/brew leaves); do
    echo "  \"${formula}\" [style=filled,fillcolor=\"/accent3/1\"]"
done

echo "}"