groups.js

const groupRe = /^((:?\w|-|,|, )+):\s*/i
const reverts = require('./reverts')

function toGroups (summary) {
  summary = reverts.cleanSummary(summary)
  let m = summary.match(groupRe)
  return (m && m[1]) || ''
}

function cleanSummary (summary) {
  return (summary || '').replace(groupRe, '')
}

/*

to test this, run on the commandline:

for br in v4.x v5.x v6.x v7.x; do git log $br --format='%s' | grep -E '^\d+.*elease$' >> /tmp/release-commits-all.txt; done
sort /tmp/release-commits-all.txt | uniq > /tmp/release-commits.txt
rm /tmp/release-commits-all.txt

then in this directory:

node groups.js /tmp/release-commits.txt

doesn't cover false positives though
*/

function isReleaseCommit (summary) {
  return /^Working on v?\d{1,2}\.\d{1,3}\.\d{1,3}$/.test(summary) ||
    /^\d{4}-\d{2}-\d{2},? (Node\.js|Version) v?\d{1,2}\.\d{1,3}\.\d{1,3} (["'][A-Za-z ]+["'] )?\((Current|Stable|LTS|Maintenance)\)/.test(summary) ||
    /^\d{4}-\d{2}-\d{2},? io.js v\d{1,2}\.\d{1,3}\.\d{1,3} Release/.test(summary) ||
    /^\d+\.\d+\.\d+$/.test(summary) // `npm version X` style commit
}

module.exports.toGroups = toGroups
module.exports.cleanSummary = cleanSummary
module.exports.isReleaseCommit = isReleaseCommit

if (require.main === module) {
  console.log(`Running tests on lines in ${process.argv[2]}...`)
  let failures = require('fs').readFileSync(process.argv[2], 'utf8').split('\n').filter(Boolean).filter((summary) => {
    return !isReleaseCommit(summary)
  })
  if (!failures.length) {
    console.log('All good, no failures!')
  } else {
    console.log('Failed on the following commit summaries:')
    console.log(failures.join('\n'))
  }
}