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Fix broken build script --unsafe-partial mode #22317

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Fix broken build script --unsafe-partial mode #22317

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bvaughn
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@bvaughn bvaughn commented Sep 14, 2021 •
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Resolves #22323 by replacing ncp with the recursively-copy library.

Brian Vaughn added 3 commits September 14, 2021 16:03
Replaced 'ncp' package with 'recursive-copy' package
88f72b4 
The 'ncp' package hasn't been undated for ~7 years and seems buggy based on my own testing of the Rollup build scripts. (There is a race condition that I can repro 3 out of 4 times where copying a JSON file resolves the ncp() callback while the file's contents are still empty. This breaks scripts like ours which have subsequence calls to read/parse the copied JSON.

Based on my testing, the 'recursive-copy' package does not have this problem.

This commit contains only package.json and yarn.lock changes. The next commit will update build scripts.
Update Rollup build script to use 'recursive-copy' package
100a0b4
Update Rollup build scripts to only prepareNpmPackages() filtered pac…
14cace7 
…kages
@facebook-github-bot facebook-github-bot added CLA Signed React Core Team Opened by a member of the React Core Team labels Sep 14, 2021
@bvaughn bvaughn changed the title Replaced 'ncp' package with 'recursive-copy' package Fix broken build script --unsafe-partial mode Sep 14, 2021
jstejada
jstejada approved these changes Sep 14, 2021
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okay! why does the change in the library fixes the issue? also looks like ci is failing

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bvaughn commented Sep 14, 2021

Looks like CI is pretty unhappy with this. Not sure if that's more false positives (which we get pretty often these days) or if that indicates a problem.

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bvaughn commented Sep 14, 2021

why does the change in the library fixes the issue?

An explanation is in the commit message for 88f72b4:

The 'ncp' package hasn't been undated for ~7 years and seems buggy based on my own testing of the Rollup build scripts. (There is a race condition that I can repro 3 out of 4 times where copying a JSON file resolves the ncp() callback while the file's contents are still empty. This breaks scripts like ours which have subsequence calls to read/parse the copied JSON.

Based on my testing, the 'recursive-copy' package does not have this problem.

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oh, thanks! sorry i missed that explanation in the commit message, will make sure to look there as well in the future

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bvaughn commented Sep 15, 2021

LOL no it's my fault. I should have put it in the description. My bad. I remembered writing it but forgot it wasn't in the PR.

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bvaughn commented Sep 15, 2021

I might have to give up on this for now b'c I have other stuff to do. I'll file a bug for follow up instead!

@bvaughn bvaughn closed this Sep 15, 2021
@bvaughn bvaughn mentioned this pull request Sep 15, 2021
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@jstejada jstejada jstejada approved these changes

@lunaruan lunaruan Awaiting requested review from lunaruan

@acdlite acdlite Awaiting requested review from acdlite

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Rollup build script --unsafe-partial flag is broken
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