If you run an `npm install` and then run `npm shrinkwrap`, the resulting
shrinkwrap file will contain the installed optional dependencies, making
them "required". If such optional dependency is platform dependent, `npm
install` will fail on different platform.
This is a known `shrinkwrap` limitation whose only workaround seems to
be manually filtering out platform specific dependencies from
`npm-shrinkwrap.json`.
For this purpose, we introduced the following changes:
- A custom `shrinkwrapIgnore` property in `package.json`, where we can
list specific modules that need to be filtered out from
`npm-shrinkwrap.json`.
- A NodeJS script to generate `npm-shrinkwrap.json` and omit modules
specified in `shrinkwrapIgnore` automatically.
- An NPM script called `shrinkwrap`, for convenience.
- Add `macos-alias` and `fs-xattr` to `shrinkwrapIgnore`.
- Regenerate `npm-shrinkwrap.json` based on newer dependencies from PRs
created before we introduced `npm-shrinkwrap.json` but merged after that
file was in place.
See: https://github.com/npm/npm/issues/2679
Signed-off-by: Juan Cruz Viotti <jviottidc@gmail.com>
