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repl: fix wrong parentheses #46987

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jenthone wants to merge 10 commits into from
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repl: fix wrong parentheses #46987

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af9f6ac
repl: add isValidParentheses check before wrap input
Mar 6, 2023
7fa239d
test: add Uncaught ReferenceError case
Mar 7, 2023
d372624
test: add Uncaught SyntaxError case
Mar 7, 2023
ebbc173
test: add SyntaxError: Unexpected token case
Mar 7, 2023
dc9c4c8
repl: check valid syntax by using acorn
Mar 8, 2023
3494ee6
test: add open bracket case
Mar 8, 2023
9fcd093
repl: try parse again and allowAwaitOutsideFunction
Mar 9, 2023
044516d
test: add string-keyed object case
Mar 9, 2023
22912f6
test: add more bracket cases
Mar 9, 2023
078088d
test: add multiple object case
Mar 9, 2023
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15 changes: 14 additions & 1 deletion lib/internal/repl/utils.js
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Original file line number Diff line number Diff line change
Expand Up @@ -299,7 +299,9 @@ function setupPreview(repl, contextSymbol, bufferSymbol, active) {
// For similar reasons as `defaultEval`, wrap expressions starting with a
// curly brace with parenthesis.
if (StringPrototypeStartsWith(input, '{') &&
!StringPrototypeEndsWith(input, ';') && !wrapped) {
!StringPrototypeEndsWith(input, ';') &&
isValidSyntax(input) &&
!wrapped) {
input = `(${input})`;
wrapped = true;
}
Expand Down Expand Up @@ -740,11 +742,22 @@ function setupReverseSearch(repl) {
return { reverseSearch };
}

function isValidSyntax(input) {
const Parser = require('internal/deps/acorn/acorn/dist/acorn').Parser;
try {
Parser.parse(input, { ecmaVersion: 'latest' });
return true;
} catch {
return false;
}
}

module.exports = {
REPL_MODE_SLOPPY: Symbol('repl-sloppy'),
REPL_MODE_STRICT,
isRecoverableError,
kStandaloneREPL: Symbol('kStandaloneREPL'),
setupPreview,
setupReverseSearch,
isValidSyntax,
};
5 changes: 4 additions & 1 deletion lib/repl.js
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Original file line number Diff line number Diff line change
Expand Up @@ -163,6 +163,7 @@ const {
kStandaloneREPL,
setupPreview,
setupReverseSearch,
isValidSyntax,
} = require('internal/repl/utils');
const {
constants: {
Expand Down Expand Up @@ -420,7 +421,8 @@ function REPLServer(prompt,
// an expression. Note that if the above condition changes,
// lib/internal/repl/utils.js needs to be changed to match.
if (RegExpPrototypeExec(/^\s*{/, code) !== null &&
RegExpPrototypeExec(/;\s*$/, code) === null) {
RegExpPrototypeExec(/;\s*$/, code) === null &&
isValidSyntax(code)) {
code = `(${StringPrototypeTrim(code)})\n`;
wrappedCmd = true;
}
Expand Down Expand Up @@ -1819,6 +1821,7 @@ module.exports = {
REPL_MODE_SLOPPY,
REPL_MODE_STRICT,
Recoverable,
isValidSyntax,
};

ObjectDefineProperty(module.exports, 'builtinModules', {
Expand Down
43 changes: 41 additions & 2 deletions test/parallel/test-repl-preview.js
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Expand Up @@ -157,6 +157,40 @@ async function tests(options) {
'\x1B[90m1\x1B[39m\x1B[12G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[33m1\x1B[39m',
]
}, {
input: 'aaaa',
noPreview: 'Uncaught ReferenceError: aaaa is not defined',
preview: [
'aaaa\r',
'Uncaught ReferenceError: aaaa is not defined',
]
}, {
input: '/0',
noPreview: '/0',
preview: [
'/0\r',
'/0',
'^',
'',
'Uncaught SyntaxError: Invalid regular expression: missing /',
]
}, {
input: '{})',
noPreview: '{})',
preview: [
'{})\r',
'{})',
' ^',
'',
"Uncaught SyntaxError: Unexpected token ')'",
],
}, {
input: "{ a: '{' }",
noPreview: "{ a: \x1B[32m'{'\x1B[39m }",
preview: [
"{ a: '{' }\r",
"{ a: \x1B[32m'{'\x1B[39m }",
],
}];

const hasPreview = repl.terminal &&
Expand All @@ -177,8 +211,13 @@ async function tests(options) {
assert.deepStrictEqual(lines, preview);
} else {
assert.ok(lines[0].includes(noPreview), lines.map(inspect));
if (preview.length !== 1 || preview[0] !== `${input}\r`)
assert.strictEqual(lines.length, 2);
if (preview.length !== 1 || preview[0] !== `${input}\r`) {
if (preview[preview.length - 1].includes('Uncaught SyntaxError')) {
assert.strictEqual(lines.length, 5);
} else {
assert.strictEqual(lines.length, 2);
}
}
}
}
}
Expand Down