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fs: replace SetMethodNoSideEffect in node_file.cc - #49857

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CanadaHonk:fs-replace-nosideeffect
Sep 27, 2023
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fs: replace SetMethodNoSideEffect in node_file.cc#49857
nodejs-github-bot merged 1 commit into
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CanadaHonk:fs-replace-nosideeffect

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@CanadaHonk

@CanadaHonkCanadaHonk commented Sep 25, 2023

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All FS methods should not use it since FS operations will have side effects (suggested by @anonrig)

@nodejs-github-botnodejs-github-bot added c++ Issues and PRs that require attention from people who are familiar with C++. fs Issues and PRs related to the fs subsystem / file system. needs-ci PRs that need a full CI run. labels Sep 25, 2023
@anonrig

anonrig commented Sep 25, 2023

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cc @joyeecheung

@anonriganonrig added fast-track PRs that do not need to wait for 48 hours to land. author ready PRs that have at least one approval, no pending requests for changes, and a CI started. request-ci Add this label to start a Jenkins CI on a PR. labels Sep 25, 2023
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CI: https://ci.nodejs.org/job/node-test-pull-request/54214/

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CanadaHonkforce-pushed the fs-replace-nosideeffect branch from 2cf762e to bf379efCompareSeptember 25, 2023 13:19
@benjamingr

benjamingr commented Sep 25, 2023

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Why is this being fast tracked does it unblock something?

@CanadaHonk

CanadaHonk commented Sep 25, 2023

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Why is this being fast tracked does it unblock something?

Pretty sure it's because it fixes repl possibly doing unwanted real FS ops for a few functions if you were to type out but not press enter (eg fs.copyFileSync(...)).

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CI: https://ci.nodejs.org/job/node-test-pull-request/54217/

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CI: https://ci.nodejs.org/job/node-test-pull-request/54221/

@cjihrig

cjihrig commented Sep 25, 2023

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The fact that this fixes a bug does not really mean that it qualifies for fast tracking.

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@targos

targos commented Sep 25, 2023•
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  • The side-effect of copyFileSync is obvious.
  • I guess that readFileUtf8 can modify the atime of the file
  • But what are the observable side-effects of accessSync and existsSync ?

@anonrig

anonrig commented Sep 25, 2023

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But what are the observable side-effects of accessSync and existsSync ?

There isn't but referring to @joyeecheung's message (ref: #49748 (comment)), I think it is unnecessary to run fs operations (since they're costly) on REPL.

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@cjihrig

cjihrig commented Sep 26, 2023

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but referring to @joyeecheung's message

I don't interpret @joyeecheung's comment (but please correct me if I'm wrong) to mean we shouldn't do it because of performance reasons. I interpret it as chown() having very real side effects.

I think it is unnecessary to run fs operations (since they're costly) on REPL.

I don't feel strongly about this, but I think this is another case where performance just isn't important. The REPL is meant to be interactive and a person typing fs.accessSync() or fs.existsSync() is very unlikely to notice any difference in performance.

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nodejs-github-bot merged commit 783f64b into nodejs:mainSep 27, 2023
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Landed in 783f64b

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ruyadorno pushed a commit that referenced this pull request Sep 28, 2023
@CanadaHonk@ruyadorno
fs: replace SetMethodNoSideEffect in node_file
9363179
PR-URL: #49857
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
@ruyadornoruyadorno mentioned this pull request Sep 28, 2023
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ruyadorno pushed a commit that referenced this pull request Sep 28, 2023
@CanadaHonk@ruyadorno
fs: replace SetMethodNoSideEffect in node_file
ec323bb
PR-URL: #49857
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
@ruyadornoruyadorno mentioned this pull request Sep 28, 2023
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debadree25 pushed a commit to debadree25/node that referenced this pull request Apr 15, 2024
@CanadaHonk@debadree25
fs: replace SetMethodNoSideEffect in node_file
554bc6e
PR-URL: nodejs#49857
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
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