bin

#!/usr/bin/env node
const npmAuthorsContributors = require('npm-authors-contributors')
const yargs = require('yargs')

const argv = yargs
  .scriptName('creditstxt')
  .usage('Usage: $0 [options]')
  .alias('h', 'help')
  .alias('v', 'version')
  .describe('production', 'Do not output contributors to devDependencies')
  .boolean('production')
  .example('npx creditstxt > static/credits.txt')
  .argv

const options = { productionOnly: argv.production }
npmAuthorsContributors(options, process.cwd(), function (error, people) {
  if (error) {
    console.error(error)
    process.exit(1)
  }

  // Compile an Object map from contributor or author name to an Array
  // of package names to which they contributed.
  const packagesByName = {}
  people.forEach(function (person) {
    const name = person.name
    if (!name) return
    if (packagesByName.name) {
      person.packages.forEach(function (packageName) {
        const packages = packagesByName[name]
        if (packages.indexOf(packageName) === -1) {
          packages.push(packageName)
        }
      })
    } else {
      packagesByName[name] = person.packages
    }
  })

  // Output one line per contributor, listing their packages.
  Object.keys(packagesByName)
    .sort()
    .forEach(function (name) {
      console.log(
        name + ': ' + packagesByName[name].sort().join(', ')
      )
    })
})