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repl: support --loader option in builtin REPL
Fixes: #33435 PR-URL: #33437 Backport-PR-URL: #35394 Reviewed-By: Gus Caplan <[email protected]> Reviewed-By: Ruben Bridgewater <[email protected]>
1 parent 1a8669d commit b7be751

8 files changed

+65
-51
lines changed

‎lib/internal/main/repl.js

+27-24
Original file line numberDiff line numberDiff line change
@@ -7,6 +7,7 @@ const {
77
prepareMainThreadExecution
88
} = require('internal/bootstrap/pre_execution');
99

10+
const esmLoader = require('internal/process/esm_loader');
1011
const {
1112
evalScript
1213
} = require('internal/process/execution');
@@ -32,31 +33,33 @@ if (process.env.NODE_REPL_EXTERNAL_MODULE) {
3233
process.exit(1);
3334
}
3435

35-
console.log(`Welcome to Node.js ${process.version}.\n` +
36-
'Type ".help" for more information.');
36+
esmLoader.loadESM(() => {
37+
console.log(`Welcome to Node.js ${process.version}.\n` +
38+
'Type ".help" for more information.');
3739

38-
const cliRepl = require('internal/repl');
39-
cliRepl.createInternalRepl(process.env, (err, repl) => {
40-
if (err) {
41-
throw err;
42-
}
43-
repl.on('exit', () => {
44-
if (repl._flushing) {
45-
repl.pause();
46-
return repl.once('flushHistory', () => {
47-
process.exit();
48-
});
40+
const cliRepl = require('internal/repl');
41+
cliRepl.createInternalRepl(process.env, (err, repl) => {
42+
if (err) {
43+
throw err;
4944
}
50-
process.exit();
45+
repl.on('exit', () => {
46+
if (repl._flushing) {
47+
repl.pause();
48+
return repl.once('flushHistory', () => {
49+
process.exit();
50+
});
51+
}
52+
process.exit();
53+
});
5154
});
52-
});
53-
54-
// If user passed '-e' or '--eval' along with `-i` or `--interactive`,
55-
// evaluate the code in the current context.
56-
if (getOptionValue('[has_eval_string]')) {
57-
evalScript('[eval]',
58-
getOptionValue('--eval'),
59-
getOptionValue('--inspect-brk'),
60-
getOptionValue('--print'));
61-
}
55+
56+
// If user passed '-e' or '--eval' along with `-i` or `--interactive`,
57+
// evaluate the code in the current context.
58+
if (getOptionValue('[has_eval_string]')) {
59+
evalScript('[eval]',
60+
getOptionValue('--eval'),
61+
getOptionValue('--inspect-brk'),
62+
getOptionValue('--print'));
63+
}
64+
}, false);
6265
}

‎lib/internal/modules/run_main.js

+2-13
Original file line numberDiff line numberDiff line change
@@ -40,21 +40,10 @@ function shouldUseESMLoader(mainPath) {
4040
function runMainESM(mainPath) {
4141
const esmLoader = require('internal/process/esm_loader');
4242
const { pathToFileURL } = require('internal/url');
43-
const { hasUncaughtExceptionCaptureCallback } =
44-
require('internal/process/execution');
45-
return esmLoader.initializeLoader().then(() => {
43+
esmLoader.loadESM((ESMLoader) => {
4644
const main = path.isAbsolute(mainPath) ?
4745
pathToFileURL(mainPath).href : mainPath;
48-
return esmLoader.ESMLoader.import(main);
49-
}).catch((e) => {
50-
if (hasUncaughtExceptionCaptureCallback()) {
51-
process._fatalException(e);
52-
return;
53-
}
54-
internalBinding('errors').triggerUncaughtException(
55-
e,
56-
true /* fromPromise */
57-
);
46+
return ESMLoader.import(main);
5847
});
5948
}
6049

‎lib/internal/process/esm_loader.js

+25-5
Original file line numberDiff line numberDiff line change
@@ -5,6 +5,9 @@ const {
55
} = require('internal/errors').codes;
66
const assert = require('internal/assert');
77
const { Loader } = require('internal/modules/esm/loader');
8+
const {
9+
hasUncaughtExceptionCaptureCallback,
10+
} = require('internal/process/execution');
811
const { pathToFileURL } = require('internal/url');
912
const {
1013
getModuleFromWrap,
@@ -45,12 +48,13 @@ let ESMLoader = new Loader();
4548
exports.ESMLoader = ESMLoader;
4649

4750
let calledInitialize = false;
48-
exports.initializeLoader = initializeLoader;
49-
async function initializeLoader() {
51+
async function initializeLoader(emitWarning) {
5052
assert(calledInitialize === false);
51-
process.emitWarning(
52-
'The ESM module loader is experimental.',
53-
'ExperimentalWarning', undefined);
53+
if (emitWarning) {
54+
process.emitWarning(
55+
'The ESM module loader is experimental.',
56+
'ExperimentalWarning', undefined);
57+
}
5458
calledInitialize = true;
5559
if (!userLoader)
5660
return;
@@ -73,3 +77,19 @@ async function initializeLoader() {
7377
return exports.ESMLoader = ESMLoader;
7478
})();
7579
}
80+
81+
exports.loadESM = async function loadESM(callback, emitWarning = true) {
82+
try {
83+
await initializeLoader(emitWarning);
84+
await callback(ESMLoader);
85+
} catch (err) {
86+
if (hasUncaughtExceptionCaptureCallback()) {
87+
process._fatalException(err);
88+
return;
89+
}
90+
internalBinding('errors').triggerUncaughtException(
91+
err,
92+
true /* fromPromise */
93+
);
94+
}
95+
};

‎test/message/esm_display_syntax_error_import.out

+1
Original file line numberDiff line numberDiff line change
@@ -6,3 +6,4 @@ SyntaxError: The requested module '../fixtures/es-module-loaders/module-named-ex
66
at ModuleJob._instantiate (internal/modules/esm/module_job.js:*:*)
77
at async ModuleJob.run (internal/modules/esm/module_job.js:*:*)
88
at async Loader.import (internal/modules/esm/loader.js:*:*)
9+
at async Object.loadESM (internal/process/esm_loader.js:*:*)

‎test/message/esm_display_syntax_error_import_module.out

+1
Original file line numberDiff line numberDiff line change
@@ -6,3 +6,4 @@ SyntaxError: The requested module './module-named-exports.mjs' does not provide
66
at ModuleJob._instantiate (internal/modules/esm/module_job.js:*:*)
77
at async ModuleJob.run (internal/modules/esm/module_job.js:*:*)
88
at async Loader.import (internal/modules/esm/loader.js:*:*)
9+
at async Object.loadESM (internal/process/esm_loader.js:*:*)

‎test/message/esm_loader_not_found.out

+4-4
Original file line numberDiff line numberDiff line change
@@ -1,6 +1,6 @@
11
(node:*) ExperimentalWarning: The ESM module loader is experimental.
22
(node:*) ExperimentalWarning: --experimental-loader is an experimental feature. This feature could change at any time
3-
internal/modules/run_main.js:*
3+
internal/process/esm_loader.js:*
44
internalBinding('errors').triggerUncaughtException(
55
^
66
Error [ERR_MODULE_NOT_FOUND]: Cannot find package 'i-dont-exist' imported from *
@@ -11,8 +11,8 @@ Error [ERR_MODULE_NOT_FOUND]: Cannot find package 'i-dont-exist' imported from *
1111
at Loader.getModuleJob (internal/modules/esm/loader.js:*:*)
1212
at Loader.import (internal/modules/esm/loader.js:*:*)
1313
at internal/process/esm_loader.js:*:*
14-
at Object.initializeLoader (internal/process/esm_loader.js:*:*)
15-
at runMainESM (internal/modules/run_main.js:*:*)
16-
at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:*:*) {
14+
at initializeLoader (internal/process/esm_loader.js:*:*)
15+
at Object.loadESM (internal/process/esm_loader.js:*:*)
16+
at runMainESM (internal/modules/run_main.js:*:*) {
1717
code: 'ERR_MODULE_NOT_FOUND'
1818
}

‎test/message/esm_loader_not_found_cjs_hint_bare.out

+1-1
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,5 @@
11
(node:*) ExperimentalWarning: The ESM module loader is experimental.
2-
internal/modules/run_main.js:*
2+
internal/process/esm_loader.js:*
33
internalBinding('errors').triggerUncaughtException(
44
^
55

‎test/message/esm_loader_not_found_cjs_hint_relative.out

+4-4
Original file line numberDiff line numberDiff line change
@@ -1,6 +1,6 @@
11
(node:*) ExperimentalWarning: The ESM module loader is experimental.
22
(node:*) ExperimentalWarning: --experimental-loader is an experimental feature. This feature could change at any time
3-
internal/modules/run_main.js:*
3+
internal/process/esm_loader.js:*
44
internalBinding('errors').triggerUncaughtException(
55
^
66

@@ -13,8 +13,8 @@ Did you mean to import ./test/common/fixtures.js?
1313
at Loader.getModuleJob (internal/modules/esm/loader.js:*:*)
1414
at Loader.import (internal/modules/esm/loader.js:*:*)
1515
at internal/process/esm_loader.js:*:*
16-
at Object.initializeLoader (internal/process/esm_loader.js:*:*)
17-
at runMainESM (internal/modules/run_main.js:*:*)
18-
at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:*:*) {
16+
at initializeLoader (internal/process/esm_loader.js:*:*)
17+
at Object.loadESM (internal/process/esm_loader.js:*:*)
18+
at runMainESM (internal/modules/run_main.js:*:*) {
1919
code: 'ERR_MODULE_NOT_FOUND'
2020
}

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