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module: open stat/readPackage to mutations #44537

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Merged
merged 3 commits into from
Sep 18, 2022
Merged

module: open stat/readPackage to mutations #44537

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8dce57e
module: open stat/readPackage to mutations
arcanis Sep 6, 2022
1e221d9
Adds experimental warnings when patching _stat/_readPackage
arcanis Sep 14, 2022
a983192
Update loader.js
arcanis Sep 14, 2022
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44 changes: 37 additions & 7 deletions lib/internal/modules/cjs/loader.js
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Original file line number Diff line number Diff line change
Expand Up @@ -79,7 +79,13 @@ const {
maybeCacheSourceMap,
} = require('internal/source_map/source_map_cache');
const { pathToFileURL, fileURLToPath, isURLInstance } = require('internal/url');
const { deprecate, kEmptyObject, filterOwnProperties, setOwnProperty } = require('internal/util');
const {
deprecate,
emitExperimentalWarning,
kEmptyObject,
filterOwnProperties,
setOwnProperty,
} = require('internal/util');
const vm = require('vm');
const assert = require('internal/assert');
const fs = require('fs');
Expand Down Expand Up @@ -163,6 +169,18 @@ function stat(filename) {
return result;
}

let _stat = stat;
ObjectDefineProperty(Module, '_stat', {
__proto__: null,
get() { return _stat; },
set(stat) {
emitExperimentalWarning('Module._stat');
_stat = stat;
return true;
},
configurable: true,
});

function updateChildren(parent, child, scan) {
const children = parent?.children;
if (children && !(scan && ArrayPrototypeIncludes(children, child)))
Expand Down Expand Up @@ -335,6 +353,18 @@ function readPackage(requestPath) {
}
}

let _readPackage = readPackage;
ObjectDefineProperty(Module, '_readPackage', {
__proto__: null,
get() { return _readPackage; },
set(readPackage) {
emitExperimentalWarning('Module._readPackage');
_readPackage = readPackage;
return true;
},
configurable: true,
});

function readPackageScope(checkPath) {
const rootSeparatorIndex = StringPrototypeIndexOf(checkPath, sep);
let separatorIndex;
Expand All @@ -343,7 +373,7 @@ function readPackageScope(checkPath) {
checkPath = StringPrototypeSlice(checkPath, 0, separatorIndex);
if (StringPrototypeEndsWith(checkPath, sep + 'node_modules'))
return false;
const pjson = readPackage(checkPath + sep);
const pjson = _readPackage(checkPath + sep);
if (pjson) return {
data: pjson,
path: checkPath,
Expand All @@ -353,7 +383,7 @@ function readPackageScope(checkPath) {
}

function tryPackage(requestPath, exts, isMain, originalPath) {
const pkg = readPackage(requestPath)?.main;
const pkg = _readPackage(requestPath)?.main;

if (!pkg) {
return tryExtensions(path.resolve(requestPath, 'index'), exts, isMain);
Expand Down Expand Up @@ -399,7 +429,7 @@ const realpathCache = new SafeMap();
// keep symlinks intact, otherwise resolve to the
// absolute realpath.
function tryFile(requestPath, isMain) {
const rc = stat(requestPath);
const rc = _stat(requestPath);
if (rc !== 0) return;
if (preserveSymlinks && !isMain) {
return path.resolve(requestPath);
Expand Down Expand Up @@ -493,7 +523,7 @@ function resolveExports(nmPath, request) {
if (!name)
return;
const pkgPath = path.resolve(nmPath, name);
const pkg = readPackage(pkgPath);
const pkg = _readPackage(pkgPath);
if (pkg?.exports != null) {
try {
return finalizeEsmResolution(packageExportsResolve(
Expand Down Expand Up @@ -533,7 +563,7 @@ Module._findPath = function(request, paths, isMain) {
for (let i = 0; i < paths.length; i++) {
// Don't search further if path doesn't exist
const curPath = paths[i];
if (curPath && stat(curPath) < 1) continue;
if (curPath && _stat(curPath) < 1) continue;

if (!absoluteRequest) {
const exportsResolved = resolveExports(curPath, request);
Expand All @@ -544,7 +574,7 @@ Module._findPath = function(request, paths, isMain) {
const basePath = path.resolve(curPath, request);
let filename;

const rc = stat(basePath);
const rc = _stat(basePath);
if (!trailingSlash) {
if (rc === 0) { // File.
if (!isMain) {
Expand Down