Rootcanal workaround script for using libraries (example composer.json and bash script).

libraries

#! /bin/bash

set -e
path=$(dirname "$0")
base=$(cd $path/.. && pwd)

# Move ckeditor to the Drupal project.
if [[ -d $base/vendor/ckeditor/ckeditor ]] && [[ ! -d $base/www/sites/all/libraries/ckeditor ]]; then
  cp -r $base/vendor/ckeditor/ckeditor $base/www/sites/all/libraries/
fi

Rootcanal + Libraries workaround

[...]
"config": {
        "bin-dir": "bin",
        "process-timeout": 1200
    },
    "scripts": {
        "post-install-cmd": [
            "bin/rootcanal",
            "bin/libraries"
        ],
        "post-update-cmd": [
            "bin/rootcanal",
            "bin/libraries"
        ]
    },
[...]