egoist/rollup-plugin-postcss

Compatibility with yarn v2

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#238 opened on Feb 29, 2020

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 (9 comments) (4 reactions) (0 assignees)JavaScript (689 stars) (209 forks)user submission
buggood first prhelp wanted

Description

When running in the context of Yarn v2 Pnp, this plugin fails with the error.

Example with react-grid-layout:

[!] (plugin postcss) Error: EISDIR: illegal operation on a directory, read
../../../.yarn/$$virtual/react-grid-layout-virtual-663c3a9629/0/cache/react-grid-layout-npm-0.16.6-5842f88c2d-2.zip/node_modules/react-grid-layout/css/styles.css

The only workaround is to yarn unplug react-grid-layout

Contributor guide

Tech stack
javascriptnodejs
Domain
build systemdeveloper experiencetooling
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
knowledge of Yarn PnPfamiliarity with Rollup plugins
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
25
Research direction
Investigate the error EISDIR when reading CSS files under Yarn v2 PnP. The issue is that the plugin tries to read a file from a virtual directory path inside a zip archive. Look at how rollup plugin postcss uses fs.readFile or similar, and consider using the PnP API to resolve files properly. Check comments in the issue for any suggested approaches or workarounds. The goal is to make the plugin compatible with Yarn PnP without requiring users to unplug packages.