Yarn workspaces dependencies

yarnWorkspacesDependencies.js

import { execSync } from 'child_process';
import { parseArgs } from 'node:util';

export const { values: args } = parseArgs({
  options: {
    workspace: { type: 'string', short: 'w' },
  },
});

const foundDependencies = new Set();
const targetApplication = args['workspace'];
const targetWorkspace = findWorkspace(targetApplication);

if (!targetWorkspace) {
  console.error(`Unable to find workspace for ${targetApplication}`);
  process.exit(1);
}

console.info(`Dependencies for ${targetApplication}:`);
buildDependencyList(targetWorkspace.name);
console.log(foundDependencies);

function findWorkspace(targetApplication) {
  // Get monorepo workspace information
  const listOutput = execSync('yarn workspaces list --json', {
    encoding: 'utf-8',
  });

  // Parse the output to extract workspace information
  const workspaces = listOutput
    .split('\n')
    .filter(Boolean)
    .map((workspace) => JSON.parse(workspace));

  // Find the workspace path for the target application
  return workspaces.find((workspace) => workspace.name === targetApplication);
}

// Recursively build the dependency list
function buildDependencyList(workspaceName) {
  const output = execSync(`yarn why --json ${workspaceName}`, {
    encoding: 'utf-8',
  });
  const dependencies = output
    .split('\n')
    .filter(Boolean)
    .map((dependencies) => JSON.parse(dependencies));

  dependencies.forEach(({ value }) => {
    const [, rawName] = value.split('@');
    const name = `@${rawName}`;
    foundDependencies.add(name);
    buildDependencyList(name);
  });
}