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b1094dbe19
This PR updates the current `--experimental-modules` implementation
based on the work of the modules team and reflects Phase 2 of our
new modules plan.
The largest differences from the current implementation include
* `packge.type` which can be either `module` or `commonjs`
- `type: "commonjs"`:
- `.js` is parsed as commonjs
- default for entry point without an extension is commonjs
- `type: "module"`:
- `.js` is parsed as esm
- does not support loading JSON or Native Module by default
- default for entry point without an extension is esm
* `--entry-type=[mode]`
- allows you set the type on entry point.
* A new file extension `.cjs`.
- this is specifically to support importing commonjs in the
`module` mode.
- this is only in the esm loader, the commonjs loader remains
untouched, but the extension will work in the old loader if you use
the full file path.
* `--es-module-specifier-resolution=[type]`
- options are `explicit` (default) and `node`
- by default our loader will not allow for optional extensions in
the import, the path for a module must include the extension if
there is one
- by default our loader will not allow for importing directories that
have an index file
- developers can use `--es-module-specifier-resolution=node` to
enable the commonjs specifier resolution algorithm
- This is not a “feature” but rather an implementation for
experimentation. It is expected to change before the flag is
removed
* `--experimental-json-loader`
- the only way to import json when `"type": "module"`
- when enable all `import 'thing.json'` will go through the
experimental loader independent of mode
- based on https://github.com/whatwg/html/issues/4315
* You can use `package.main` to set an entry point for a module
- the file extensions used in main will be resolved based on the
`type` of the module
Refs: https://github.com/nodejs/modules/blob/master/doc/plan-for-new-modules-implementation.md
Refs: https://github.com/GeoffreyBooth/node-import-file-specifier-resolution-proposal
Refs: https://github.com/nodejs/modules/pull/180
Refs: https://github.com/nodejs/ecmascript-modules/pull/6
Refs: https://github.com/nodejs/ecmascript-modules/pull/12
Refs: https://github.com/nodejs/ecmascript-modules/pull/28
Refs: https://github.com/nodejs/modules/issues/255
Refs: https://github.com/whatwg/html/issues/4315
Refs: https://github.com/w3c/webcomponents/issues/770
Co-authored-by: Myles Borins <MylesBorins@google.com>
Co-authored-by: John-David Dalton <john.david.dalton@gmail.com>
Co-authored-by: Evan Plaice <evanplaice@gmail.com>
Co-authored-by: Geoffrey Booth <webmaster@geoffreybooth.com>
Co-authored-by: Michaël Zasso <targos@protonmail.com>
PR-URL: https://github.com/nodejs/node/pull/26745
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Guy Bedford <guybedford@gmail.com>
Reviewed-By: Ben Coe <bencoe@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
45 lines
1.0 KiB
JavaScript
45 lines
1.0 KiB
JavaScript
'use strict';
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// Create the REPL if `-i` or `--interactive` is passed, or if
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// the main module is not specified and stdin is a TTY.
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const {
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prepareMainThreadExecution
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} = require('internal/bootstrap/pre_execution');
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const {
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evalScript
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} = require('internal/process/execution');
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prepareMainThreadExecution();
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// --entry-type flag not supported in REPL
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if (require('internal/options').getOptionValue('--entry-type')) {
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console.error('Cannot specify --entry-type for REPL');
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process.exit(1);
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}
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const cliRepl = require('internal/repl');
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cliRepl.createInternalRepl(process.env, (err, repl) => {
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if (err) {
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throw err;
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}
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repl.on('exit', () => {
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if (repl._flushing) {
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repl.pause();
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return repl.once('flushHistory', () => {
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process.exit();
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});
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}
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process.exit();
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});
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});
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// If user passed '-e' or '--eval' along with `-i` or `--interactive`,
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// evaluate the code in the current context.
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if (process._eval != null) {
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evalScript('[eval]', process._eval, process._breakFirstLine);
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}
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markBootstrapComplete();
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