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module: use undefined if no main #18593

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module: use undefined if no main #18593

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7 changes: 3 additions & 4 deletions src/node_file.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -652,9 +652,8 @@ void Close(const FunctionCallbackInfo<Value>& args) {


// Used to speed up module loading. Returns the contents of the file as
// a string or undefined when the file cannot be opened. Returns an empty
// string when the file does not contain the substring '"main"' because that
// is the property we care about.
// a string or undefined when the file cannot be opened or "main" is not found
// in the file.
static void InternalModuleReadJSON(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
uv_loop_t* loop = env->event_loop();
Expand Down Expand Up @@ -704,7 +703,7 @@ static void InternalModuleReadJSON(const FunctionCallbackInfo<Value>& args) {

const size_t size = offset - start;
if (size == 0 || size == SearchString(&chars[start], size, "\"main\"")) {
args.GetReturnValue().SetEmptyString();
return;
} else {
Local<String> chars_string =
String::NewFromUtf8(env->isolate(),
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5 changes: 3 additions & 2 deletions test/parallel/test-module-binding.js
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Expand Up @@ -6,8 +6,9 @@ const { readFileSync } = require('fs');
const { strictEqual } = require('assert');

strictEqual(internalModuleReadJSON('nosuchfile'), undefined);
strictEqual(internalModuleReadJSON(fixtures.path('empty.txt')), '');
strictEqual(internalModuleReadJSON(fixtures.path('empty-with-bom.txt')), '');
strictEqual(internalModuleReadJSON(fixtures.path('empty.txt')), undefined);
strictEqual(internalModuleReadJSON(fixtures.path('empty-with-bom.txt')),
undefined);
{
const filename = fixtures.path('require-bin/package.json');
strictEqual(internalModuleReadJSON(filename), readFileSync(filename, 'utf8'));
Expand Down