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fix: add global path in require.resolve.paths #13633

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merged 10 commits into from Dec 2, 2022
Merged

fix: add global path in require.resolve.paths #13633

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46da204
fix: add global path in require.resolve.paths
lvqq Nov 21, 2022
c96b300
test: update snapshot
lvqq Nov 21, 2022
6dc8310
test: update snapshot
lvqq Nov 21, 2022
349dd7d
test: add builtin module test case
lvqq Nov 23, 2022
4ae19b9
refactor: grap global paths only once
lvqq Nov 24, 2022
b010ad2
test: update cases and snapshot
lvqq Nov 24, 2022
1c88b5c
chore: add path join and update test case
lvqq Nov 24, 2022
c026cd9
test: update test cases
lvqq Nov 28, 2022
d27aa8b
clarify and add changelog
jeysal Nov 29, 2022
4a9642c
Merge remote-tracking branch 'origin/main' into fix-require-resolve-p…
jeysal Dec 2, 2022
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4 changes: 2 additions & 2 deletions e2e/__tests__/__snapshots__/moduleNameMapper.test.ts.snap
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Expand Up @@ -41,7 +41,7 @@ exports[`moduleNameMapper wrong array configuration 1`] = `
12 | module.exports = () => 'test';
13 |

at createNoMappedModuleFoundError (../../packages/jest-resolve/build/resolver.js:752:17)
at createNoMappedModuleFoundError (../../packages/jest-resolve/build/resolver.js:773:17)
at Object.require (index.js:10:1)
at Object.require (__tests__/index.js:10:20)"
`;
Expand Down Expand Up @@ -71,7 +71,7 @@ exports[`moduleNameMapper wrong configuration 1`] = `
12 | module.exports = () => 'test';
13 |

at createNoMappedModuleFoundError (../../packages/jest-resolve/build/resolver.js:752:17)
at createNoMappedModuleFoundError (../../packages/jest-resolve/build/resolver.js:773:17)
at Object.require (index.js:10:1)
at Object.require (__tests__/index.js:10:20)"
`;
2 changes: 1 addition & 1 deletion e2e/__tests__/__snapshots__/requireMissingExt.test.ts.snap
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Expand Up @@ -26,7 +26,7 @@ exports[`shows a proper error from deep requires 1`] = `
12 | test('dummy', () => {
13 | expect(1).toBe(1);
at Resolver._throwModNotFoundError (../../packages/jest-resolve/build/resolver.js:425:11)
at Resolver._throwModNotFoundError (../../packages/jest-resolve/build/resolver.js:427:11)
at Object.<anonymous> (node_modules/discord.js/src/index.js:21:12)
at Object.require (__tests__/test.js:10:1)"
`;
2 changes: 1 addition & 1 deletion e2e/__tests__/__snapshots__/resolveNoFileExtensions.test.ts.snap
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Expand Up @@ -37,7 +37,7 @@ exports[`show error message with matching files 1`] = `
| ^
9 |

at Resolver._throwModNotFoundError (../../packages/jest-resolve/build/resolver.js:425:11)
at Resolver._throwModNotFoundError (../../packages/jest-resolve/build/resolver.js:427:11)
at Object.require (index.js:8:18)
at Object.require (__tests__/test.js:8:11)"
`;
40 changes: 40 additions & 0 deletions packages/jest-resolve/src/__tests__/resolve.test.ts
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Expand Up @@ -707,3 +707,43 @@ describe('Resolver.getModulePaths() -> nodeModulesPaths()', () => {
expect(dirs_actual).toEqual(expect.arrayContaining(dirs_expected));
});
});

describe('Resolver.getGlobalPaths()', () => {
const _path = path;
let moduleMap: IModuleMap;
beforeEach(() => {
moduleMap = ModuleMap.create('/');
});

it('return global paths with npm package', () => {
jest.doMock('path', () => _path.posix);
const resolver = new Resolver(moduleMap, {} as ResolverConfig);
const cwd = '/temp/project';
const globalPaths = resolver.getGlobalPaths(cwd, 'jest');
expect(globalPaths.length).toBeGreaterThanOrEqual(1);
});

it('return empty array with builtin module', () => {
jest.doMock('path', () => _path.posix);
const resolver = new Resolver(moduleMap, {} as ResolverConfig);
const cwd = '/temp/project';
const globalPaths = resolver.getGlobalPaths(cwd, 'fs');
expect(globalPaths).toStrictEqual([]);
});

it('return empty array with relative path', () => {
jest.doMock('path', () => _path.posix);
const resolver = new Resolver(moduleMap, {} as ResolverConfig);
const cwd = '/temp/project';
const globalPaths = resolver.getGlobalPaths(cwd, './module');
expect(globalPaths).toStrictEqual([]);
});

it('return empty array without module name', () => {
jest.doMock('path', () => _path.posix);
const resolver = new Resolver(moduleMap, {} as ResolverConfig);
const cwd = '/temp/project';
const globalPaths = resolver.getGlobalPaths(cwd);
expect(globalPaths).toStrictEqual([]);
});
});
26 changes: 26 additions & 0 deletions packages/jest-resolve/src/resolver.ts
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Expand Up @@ -59,6 +59,7 @@ export default class Resolver {
private readonly _moduleIDCache: Map<string, string>;
private readonly _moduleNameCache: Map<string, string>;
private readonly _modulePathCache: Map<string, Array<string>>;
private readonly _globalPathCache: Map<string, Array<string>>;
private readonly _supportsNativePlatform: boolean;

constructor(moduleMap: IModuleMap, options: ResolverConfig) {
Expand All @@ -81,6 +82,7 @@ export default class Resolver {
this._moduleIDCache = new Map();
this._moduleNameCache = new Map();
this._modulePathCache = new Map();
this._globalPathCache = new Map();
}

static ModuleNotFoundError = ModuleNotFoundError;
Expand Down Expand Up @@ -526,6 +528,30 @@ export default class Resolver {
return paths;
}

getGlobalPaths(from: string, moduleName?: string): Array<string> {
if (!moduleName || moduleName[0] === '.') return [];

const cachedGlobalPath = this._globalPathCache.get(moduleName);
if (cachedGlobalPath) {
return cachedGlobalPath;
}

const modulePaths = this.getModulePaths(from);
const globalPaths: Array<string> = [];

const paths = require.resolve.paths(moduleName);
if (paths) {
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I may be missing something, but do we need to spend CPU time to grab the global paths every time? I'm thinking the solution could be as simple as grabbing those global dirs once, probably just straight away in nodeModulesPaths.ts:

const GLOBAL_PATHS = findGlobalPaths();
function findGlobalPaths() {
  const paths=require.resolve.paths('/')
  // findIndex, slice, etc.
}

and append them to the paths list?

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LGTM

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@lvqq lvqq Nov 24, 2022 •
edited

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I agree with grabbing only once, but it cannot be directly in funtion nodeModulesPaths since module paths will be cached. For instance, if the path without module name is cached. then it won't update. I'd add a new function to export

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Not sure I understand the caching problem. We're talking about the "global paths" that come after /node_modules. Aren't they independent of the moduleName, something like

[
  '/home/user/.node_modules',
  '/home/user/.node_libraries'
]

// find the rootIndex and remain the global paths
const rootIndex = paths.findIndex(
path => path === modulePaths[modulePaths.length - 1],
);
globalPaths.push(...(rootIndex > -1 ? paths.slice(rootIndex + 1) : []));
}

this._globalPathCache.set(moduleName, globalPaths);
return globalPaths;
}

getModuleID(
virtualMocks: Map<string, boolean>,
from: string,
Expand Down
22 changes: 17 additions & 5 deletions packages/jest-runtime/src/index.ts
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Expand Up @@ -1066,7 +1066,13 @@ export default class Runtime {
} else {
// Only include the fromPath if a moduleName is given. Else treat as root.
const fromPath = moduleName ? from : null;
this._execModule(localModule, options, moduleRegistry, fromPath);
this._execModule(
localModule,
options,
moduleRegistry,
fromPath,
moduleName,
);
}
localModule.loaded = true;
}
Expand Down Expand Up @@ -1398,6 +1404,7 @@ export default class Runtime {
}

private _requireResolvePaths(from: string, moduleName?: string) {
const fromDir = path.resolve(from, '..');
if (moduleName == null) {
throw new Error(
'The first argument to require.resolve.paths must be a string. Received null or undefined.',
Expand All @@ -1410,19 +1417,22 @@ export default class Runtime {
}

if (moduleName[0] === '.') {
return [path.resolve(from, '..')];
return [fromDir];
}
if (this._resolver.isCoreModule(moduleName)) {
return null;
}
return this._resolver.getModulePaths(path.resolve(from, '..'));
const modulePaths = this._resolver.getModulePaths(fromDir);
const globalPaths = this._resolver.getGlobalPaths(fromDir, moduleName);
return [...modulePaths, ...globalPaths];
}

private _execModule(
localModule: InitialModule,
options: InternalModuleOptions | undefined,
moduleRegistry: ModuleRegistry,
from: string | null,
moduleName?: string,
) {
if (this.isTornDown) {
this._logFormattedReferenceError(
Expand Down Expand Up @@ -1454,8 +1464,10 @@ export default class Runtime {
return moduleRegistry.get(key) || null;
},
});

module.paths = this._resolver.getModulePaths(module.path);
module.paths = [
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While I haven't profiled this and can't know the perf impact for sure, this is a code path that runs very often, so I'd rather be safe and do something like

    module.paths = this._resolver.getModulePaths(module.path);
    if(moduleName) module.paths=[...module.paths, ...this._resolver.getGlobalPaths(etc)]

But read the other comment first, perhaps this code might change anyway

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Also, cc @SimenB who knows more about the ESM impl cause I don't know all implications changing module.paths might have

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@SimenB SimenB Nov 23, 2022 •
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module.* is unused in ESM, so any change to it shouldn't affect ESM stuff

...this._resolver.getModulePaths(module.path),
...this._resolver.getGlobalPaths(module.path, moduleName),
];
Object.defineProperty(module, 'require', {
value: this._createRequireImplementation(module, options),
});
Expand Down