make it easier to maintain package.json

Description

atm there is no way to check if a package is used in the mono repo or not. the node_module and its install get longer and longer and no way to confirm if a package is used in one of the hundred lib and app other than checking them manually.

depcheck lib doesn’t support nx, so there should be a contribution from nx to that repo or nx independant lib.

Motivation

to clean the package.json and decrease install time

Suggested Implementation

contribute to depcheck lib or come up with a built in solution

Alternate Implementations

there is none that I am aware of

[bcabanes]

You can do it with by using the project graph, though, as @FrozenPandaz mentioned above, we can’t know for sure but that will be something in the right direction, at least to have a list of packages to manually test.

Here is an example of how it could look like:

import { createProjectGraphAsync } from '@nrwl/workspace/src/core/project-graph';

async function main() {
  const graph = await createProjectGraphAsync();

  const packageJson = require('../package.json');

  const packageRecord: { [key: string]: number } = {};

  Object.keys(graph.dependencies).forEach((projectName) => {
    const deps = graph.dependencies[projectName];

    const libNames = deps
      .filter((dep) => dep.target.startsWith('npm'))
      .map((dep) => dep.target);

    libNames.forEach((libName) => {
      if (packageRecord[libName] === undefined) {
        packageRecord[libName] = 1;
      } else {
        packageRecord[libName]++;
      }
    });
  });

  Object.keys(packageJson.dependencies).forEach((libName) => {
    if (!packageRecord[`npm:${libName}`]) {
      console.log(libName);
    }
  });
}

main();

That would be a Typescript script in your /tools directory that you can execute with:

ts-node -P ./tools/tsconfig.scripts.json ./tools/check-unused-npm-dependencies.ts

[mhamri]

still it’s a valid requirement for publishable lib. we have to manually maintain the contain of package and it’s list

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