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fix(node): duplicate node_module suffixes (#19222)

Noticed that we're checking more module paths than necessary. In
particular the module path array contains a couple of entries with a
duplicated `node_modules/node_modules` suffix.

```js
[
    // ... more entries before here, where some also contain duplicate suffixes
    "/Users/marvinhagemeister/dev/preact-render-to-string/node_modules/.deno/node_modules",
    "/Users/marvinhagemeister/dev/preact-render-to-string/node_modules/node_modules", // <-- duplicate suffix
    "/Users/marvinhagemeister/dev/preact-render-to-string/node_modules",
    "/Users/marvinhagemeister/dev/node_modules",
    "/Users/marvinhagemeister/node_modules",
    "/Users/node_modules",
    "/node_modules",
    "/node_modules"  // <-- duplicate entry
]
```

This was caused by a misunderstanding in how Rust's
[`Path::ends_with()`](https://doc.rust-lang.org/std/path/struct.Path.html#method.ends_with)
works. It's designed to match on whole path segments and the suffix
`/node_modules` is not that, except for the root entry. This meant that
our check for if the path already ended with `node_module` always
returned `false`. Removing the leading slash fixes that.

While we're at it, we can remove the last condition where we explicitly
added the root `/node_modules` entry since the while loop prior to that
takes care of it already.
This commit is contained in:
Marvin Hagemeister 2023-05-23 12:46:14 +02:00 committed by GitHub
parent 5874fc3d0a
commit 8608105208
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 42 additions and 9 deletions

View file

@ -1,8 +1,12 @@
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
import { Module } from "node:module";
import { assertEquals } from "../../../test_util/std/testing/asserts.ts";
import {
assert,
assertEquals,
} from "../../../test_util/std/testing/asserts.ts";
import process from "node:process";
import * as path from "node:path";
Deno.test("[node/module _preloadModules] has internal require hook", () => {
// Check if it's there
@ -25,3 +29,32 @@ Deno.test("[node/module runMain] loads module using the current process.argv", (
// deno-lint-ignore no-explicit-any
assertEquals((globalThis as any).calledViaRunMain, true);
});
Deno.test("[node/module _nodeModulePaths] prevents duplicate /node_modules/node_modules suffix", () => {
// deno-lint-ignore no-explicit-any
const actual: string[] = (Module as any)._nodeModulePaths(
path.join(process.cwd(), "testdata", "node_modules", "foo"),
);
assert(
!actual.some((dir) => /node_modules[/\\]node_modules/g.test(dir)),
"Duplicate 'node_modules/node_modules' suffix found",
);
});
Deno.test("[node/module _nodeModulePaths] prevents duplicate root /node_modules", () => {
// deno-lint-ignore no-explicit-any
const actual: string[] = (Module as any)._nodeModulePaths(
path.join(process.cwd(), "testdata", "node_modules", "foo"),
);
assert(
new Set(actual).size === actual.length,
"Duplicate path entries found",
);
const root = path.parse(actual[0]).root;
assert(
actual.includes(path.join(root, "node_modules")),
"Missing root 'node_modules' directory",
);
});

View file

@ -128,16 +128,11 @@ where
let mut current_path = from.as_path();
let mut maybe_parent = Some(current_path);
while let Some(parent) = maybe_parent {
if !parent.ends_with("/node_modules") {
if !parent.ends_with("node_modules") {
paths.push(parent.join("node_modules").to_string_lossy().to_string());
current_path = parent;
maybe_parent = current_path.parent();
}
}
if !cfg!(windows) {
// Append /node_modules to handle root paths.
paths.push("/node_modules".to_string());
current_path = parent;
maybe_parent = current_path.parent();
}
Ok(paths)

View file

@ -607,6 +607,11 @@ Module._findPath = function (request, paths, isMain, parentPath) {
return false;
};
/**
* Get a list of potential module directories
* @param {string} fromPath The directory name of the module
* @returns {string[]} List of module directories
*/
Module._nodeModulePaths = function (fromPath) {
return ops.op_require_node_module_paths(fromPath);
};