css/script/check-versions

#!/usr/bin/env node
const getPackages = require('./get-packages')

const DEP_FIELDS = [
  'dependencies',
  'devDependencies',
  'peerDependencies',
  'optionalDependencies',
]

getPackages()
  .then(paths => {
    return paths.reduce((packages, path) => {
      const pkg = require(`../${path}/package.json`)
      packages[pkg.name] = pkg
      return packages
    }, {})
  })
  .then(packages => {
    console.log('checking %d packages...', Object.keys(packages).length)
    const matches = []
    for (const [name, pkg] of Object.entries(packages)) {
      for (const field of DEP_FIELDS) {
        const deps = pkg[field]
        if (deps instanceof Object) {
          const keys = Object.keys(deps).filter(dep => dep in packages)
          for (const dep of keys) {
            const version = deps[dep]
            let match = false
            const expected = packages[dep].version
            if (version.indexOf('file:') === 0) {
              console.warn(`${name}.${field}.${dep} uses file specifier: "${version}"`)
              match = true
            } else {
              match = expected === version
            }
            matches.push({
              from: name,
              to: dep,
              field,
              version,
              expected,
              match
            })
          }
        }
      }
    }
    return matches
  })
  .then(matches => {
    let fail = 0
    for (const item of matches) {
      if (!item.match) {
        const {from, to, field, expected, version} = item
        console.warn(`X ${from}.${field}.${to} is "${version}", but should be "${expected}"`)
        fail++
      }
    }
    if (fail > 0) {
      console.error('failed %d of %d cross-dependencies', failed, matches.length)
      process.exitCode = 1
    } else {
      console.warn('all %d cross-dependencies checked out!', matches.length)
    }
  })
  .catch(error => {
    console.error(error.message)
    process.exitCode = 1
  })