Generate JavaScript dependency graph with Madge and open in default SVG viewer

js-dependency-graph.sh

#!/bin/bash

# Generate JavaScript dependency graph with Madge and open in default SVG viewer

function random_filename() {
  local length=${1:-10}
  head -c $(( $length * 100 )) /dev/urandom | \
    tr -dc 'a-zA-Z0-9-_' | \
    head -c $length
}

function _cleanup-js-dependency-graph() {
  if [[ -z "$1" ]]; then
    return;
  fi
  local filename="$1"
  sleep 50 && rm "$filename" 2>&1
}

# https://github.com/pahen/madge
function js-dependency-graph() {
  if ! hash xdg-open 2>/dev/null 1>&2; then
    echo 1>&2 'madge and graphviz need to be installed. Aborting.'
    return
  fi

  local filename="/tmp/js_depth_graph-$(random_filename 10).svg"
  madge "$@" --image "$filename"
  if hash xdg-open 2>/dev/null 1>&2; then
    xdg-open "$filename";
  else
    open "$filename";
  fi
  _cleanup-js-depth-graph "$filename" &
}

js-dependency-graph "$@"