Patch ts-pegjs instead of using a post-install script

[busma13]

When updating xlucene-parser to ESM there was an issue with importing ts-pegjs that required either a patch or a post-install script to modify a few of its import statements. The current post-install fix isn't working in an internal project that uses yarn 3.7.0 with plug'n'play. The specific error: Error: EROFS: read-only filesystem, open '/node_modules/ts-pegjs/dist/tspegjs.mjs'.

It may be possible to modify the permissions of tspegjs.mjs from within the post-install script, but if not we could consider using https://www.npmjs.com/package/patch-package to make patching in yarn 1 easier.

[busma13]

It looks like the EROFS error was because I was importing xlucene-parser from my local branch. Once it was published to npm it imports properly.

EDIT: the issue came back in the next dependency update.

The problem is that yarn PnP creates a read-only virtual file sytem and the post-install script is attempting to write to disk. The issue was resolved by importing ts-pegjs alongside xlucene-parser and then 'unplugging' it from the virtual file system so that it can be modified.

yarn add xlucene-parser
yarn add ts-pegjs
yarn unplug ts-pegjs