Nx Dep Graph script examples

find-npm-dependents.ts

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

async function main() {
  const graph = await createProjectGraphAsync();
  const libToFind = yargs.argv._[0];

  console.log(`These projects depend on ${libToFind}`);

  Object.values(graph.dependencies).forEach((deps) => {
    deps.forEach((dep) => {
      if (dep.target === `npm:${libToFind}`) {
        console.log(` - ${dep.source}`);
      }
    });
  });
}

main();

find-unused-npm-packages.ts

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();

list-lib-dependencies.ts

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

async function main() {
  const graph = await createProjectGraphAsync();
  const libToFind = yargs.argv._[0];

  console.log(`Dependencies of lib ${libToFind}`);

  graph.dependencies[libToFind].forEach((dep) => {
    console.log(` - ${dep.target}`);
  });
}

main();