chore: fix JavaScript lint errors (issue #10000) - [x] Read, understood, and followed the [contributing guidelines](https://github.com/stdlib-js/stdlib/blob/develop/CONTRIBUTING.md)

[Sid-V5]

Fixed the no-undef ESLint errors in makie-install-node-addons/lib/main.js by replacing undefined proc references with process.

Resolves #10000

Problem

Four module-scoped callback functions (onError, onFinish, stdout, stderr) reference proc, but proc is only declared as a local variable inside the plugin() function. This causes 4 ESLint no-undef errors:

35:2  error  'proc' is not defined  no-undef
48:3  error  'proc' is not defined  no-undef
60:2  error  'proc' is not defined  no-undef
70:2  error  'proc' is not defined  no-undef

Fix

The callbacks use proc.exitCode, proc.stdout.write(), and proc.stderr.write() these are operations on the Node.js global process object, not the child process spawned inside plugin(). Replaced all 4 occurrences of proc with process in the module-scoped callbacks:

 function onError( error ) {
-	proc.exitCode = 1;
+	process.exitCode = 1;

 function onFinish( code ) {
-		proc.exitCode = code;
+		process.exitCode = code;

 function stdout( data ) {
-	proc.stdout.write( data );
+	process.stdout.write( data );

 function stderr( data ) {
-	proc.stderr.write( data );
+	process.stderr.write( data );

The local var proc inside plugin() continues to hold the child process handle from spawn() and is unaffected.

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[Planeshifter]

Thanks for opening a PR!

[Planeshifter]

The right fix here is to add the missing import rather than switching to the process global.

If you look at every other sibling makie plugin (e.g., makie-test, makie-benchmark, makie-examples -- all 21 of them), they all have this at line 23:

var proc = require( 'process' );
var spawn = require( 'child_process' ).spawn;

This file is the only one missing that require( 'process' ) import. That's the actual root cause of the lint error.

The fix should be to add var proc = require( 'process' ); before the spawn require (line 23) and then revert all four callback changes back to using proc. This keeps consistency with every other plugin in this directory and follows the stdlib convention of using require('process') rather than relying on the process global.