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src: prefer param function check over args length #23835

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src: prefer param function check over args length #23835

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codebytere
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@codebytere codebytere commented Oct 23, 2018 •
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We have to override some fs methods in Electron, and as I looked at their original impls I believe that checking the type of the second argument as opposed to simply the number of arguments passed is more consistent and reliable.

Checklist
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • commit message follows commit guidelines

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@codebytere build started: https://ci.nodejs.org/blue/organizations/jenkins/node-test-pull-request-lite-pipeline/detail/node-test-pull-request-lite-pipeline/1346/pipeline

@nodejs-github-bot nodejs-github-bot added the fs Issues and PRs related to the fs subsystem / file system. label Oct 23, 2018
cjihrig
cjihrig reviewed Oct 23, 2018
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lib/fs.js Outdated Show resolved Hide resolved
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refack commented Oct 23, 2018

👍

I had a thought once about doing something like:

function fstat(fd, ...args) {
  const lastArg = args.pop();
  const callback = (typeof lastArg === 'function') ? lastArg : throw ..;
  const options = args.pop() || {};
  ...
}

Actually what we need is a generic arg validator :dream:

function fstat(...args) {
  const { fd, options, callback } = validateArgs(args, { some sort of contract });

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mscdex commented Oct 23, 2018

CI: https://ci.nodejs.org/job/node-test-pull-request/18086/

mhdawson
mhdawson approved these changes Oct 23, 2018
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LGTM

lpinca
lpinca reviewed Oct 24, 2018
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lib/fs.js Outdated
@@ -412,7 +412,7 @@ function open(path, flags, mode, callback) {
path = toPathIfFileURL(path);
validatePath(path);
const flagsNumber = stringToFlags(flags);
if (arguments.length < 4) {
if (typeof mode === 'function') {
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I think this will conflict with @bnoordhuis's work on #23767

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Should we land #23767 first and then adapt this PR to that change? Seems do-able. /cc @codebytere @bnoordhuis

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Trott commented Nov 6, 2018

@codebytere This seems ready to go if we can get a rebase to resolve the merge conflict with #23767...

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@Trott i'll handle first thing tomorrow!

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codebytere commented Nov 6, 2018 •
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@Trott should be set! i couldn't change this line becuase if i simply checked for flags being a function that didn't properly account for the error case where no callback was passed (i.e. only one arg passed) and would improperly fail tests with ERR_INVALID_OPT_VALUE instead of ERR_INVALID_CALLBACK.

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refack commented Nov 6, 2018

CI: https://ci.nodejs.org/job/node-test-pull-request/18378/

@refack refack added the author ready PRs that have at least one approval, no pending requests for changes, and a CI started. label Nov 6, 2018
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Trott commented Nov 8, 2018

Landed in 7cf5679

@Trott Trott closed this Nov 8, 2018
Trott pushed a commit to Trott/io.js that referenced this pull request Nov 8, 2018
@codebytere @Trott
src: prefer param function check over args length
7cf5679 
PR-URL: nodejs#23835
Reviewed-By: Refael Ackermann <[email protected]>
Reviewed-By: Matheus Marchini <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: John-David Dalton <[email protected]>
Reviewed-By: Yuta Hiroto <[email protected]>
BridgeAR pushed a commit that referenced this pull request Nov 14, 2018
@codebytere @BridgeAR
src: prefer param function check over args length
17e80ec 
PR-URL: #23835
Reviewed-By: Refael Ackermann <[email protected]>
Reviewed-By: Matheus Marchini <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: John-David Dalton <[email protected]>
Reviewed-By: Yuta Hiroto <[email protected]>
@BridgeAR BridgeAR mentioned this pull request Nov 14, 2018
Merged
kiyomizumia pushed a commit to kiyomizumia/node that referenced this pull request Nov 15, 2018
@codebytere @kiyomizumia
src: prefer param function check over args length
39b6b82 
PR-URL: nodejs#23835
Reviewed-By: Refael Ackermann <[email protected]>
Reviewed-By: Matheus Marchini <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: John-David Dalton <[email protected]>
Reviewed-By: Yuta Hiroto <[email protected]>
This was referenced Nov 15, 2018
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This was referenced Nov 16, 2018
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codebytere added a commit that referenced this pull request Nov 29, 2018
@codebytere
src: prefer param function check over args length
58e9cca 
PR-URL: #23835
Reviewed-By: Refael Ackermann <[email protected]>
Reviewed-By: Matheus Marchini <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: John-David Dalton <[email protected]>
Reviewed-By: Yuta Hiroto <[email protected]>
MylesBorins pushed a commit that referenced this pull request Nov 29, 2018
@codebytere @MylesBorins
src: prefer param function check over args length
a273da9 
PR-URL: #23835
Reviewed-By: Refael Ackermann <[email protected]>
Reviewed-By: Matheus Marchini <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: John-David Dalton <[email protected]>
Reviewed-By: Yuta Hiroto <[email protected]>
@codebytere codebytere mentioned this pull request Nov 29, 2018
Merged
MylesBorins pushed a commit that referenced this pull request Dec 3, 2018
@codebytere @MylesBorins
src: prefer param function check over args length
9106ccf 
PR-URL: #23835
Reviewed-By: Refael Ackermann <[email protected]>
Reviewed-By: Matheus Marchini <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: John-David Dalton <[email protected]>
Reviewed-By: Yuta Hiroto <[email protected]>
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@jdalton jdalton jdalton approved these changes

@refack refack refack approved these changes

@jasnell jasnell jasnell approved these changes

@addaleax addaleax addaleax approved these changes

@cjihrig cjihrig cjihrig approved these changes

@hiroppy hiroppy hiroppy approved these changes

@mmarchini mmarchini mmarchini approved these changes

@mhdawson mhdawson mhdawson approved these changes

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