index.js

import path from 'path'
import gh from 'gh-got'
import readmeFilename from 'readme-filename'
import replace from 'replace-in-file'
import mm from 'micromatch'

function getRepo(baton) {
  var repo = baton.repo
  if (!repo) {
    const pkg = require(path.resolve(baton.dir, 'package.json'))
    repo = pkg.repository && (pkg.repository.url || pkg.repository)
  }

  if (!repo) {
    throw new Error(
      `${path.join(baton.dir, 'package.json')}: repository is not set.`
    )
  }

  baton.repo = repo.replace(/https?:\/\/[^\/]+\//, '').replace('.git', '')
  return baton
}

function fetch(baton) {
  const searchParams = {
    ['per_page']: baton.limit
  }

  return gh(`repos/${baton.repo}/contributors`, { searchParams }).then(res => {
    baton.contributors = res.body
    return baton
  })
}

function filter(baton) {
  if (!baton.exclude) return baton

  const isExcluded = mm.matcher(baton.exclude)
  baton.contributors = baton.contributors.filter(
    contrib => !isExcluded(contrib.login)
  )
  return baton
}

function html(baton) {
  baton.html = baton.contributors.reduce((html, contributor) => {
    /* eslint-disable */
    const line = `
      <a href="${contributor.html_url}">
        <img src="${contributor.avatar_url}" title="${contributor.login}" width="80" height="80">
      </a>`
    /* eslint-enable */
    html += line.replace(/\n/gm, '').replace(/\s{2,}/g, '') + '\n'
    return html
  }, '')
  return baton
}

function update(baton) {
  return readmeFilename(baton.dir).then(
    filename =>
      new Promise((resolve, reject) => {
        replace(
          {
            files: path.resolve(baton.dir, filename),
            // eslint-disable-next-line
            from: /\[\/\/\]: contributor-faces(?:(?:\n.*)+\[\/\/\]: contributor-faces)?/,
            to: `[//]: contributor-faces\n${baton.html}\n[//]: contributor-faces`
          },
          err => {
            /* istanbul ignore if  */
            if (err) return reject(err)
            baton.filename = filename
            resolve(baton)
          }
        )
      })
  )
}

function end(prop) {
  return baton => baton[prop]
}

function core(dir, opts) {
  opts = opts || {}
  opts.dir = dir || '.'
  opts.limit = opts.limit || 30
  return Promise.resolve(opts).then(getRepo).then(fetch).then(filter)
}

/* ────────────────────────────────────────────────────────────────────────── */

function contributors(dir, opts) {
  return core(dir, opts).then(end('contributors'))
}

contributors.html = function (dir, opts) {
  return core(dir, opts).then(html).then(end('html'))
}

contributors.update = function (dir, opts) {
  return core(dir, opts).then(html).then(update).then(end('filename'))
}

export default contributors