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collect-commit-labels.js
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collect-commit-labels.js
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'use strict'
const ghauth = require('ghauth')
const ghissues = require('ghissues')
const async = require('async')
const authOptions = {
configName: 'changelog-maker',
scopes: ['repo'],
noDeviceFlow: true
}
function collectCommitLabels (list, callback) {
const sublist = list.filter((commit) => {
return typeof commit.ghIssue === 'number' && commit.ghUser && commit.ghProject
})
if (!sublist.length) {
return setImmediate(callback)
}
ghauth(authOptions, (err, authData) => {
if (err) {
return callback(err)
}
const cache = {}
const q = async.queue((commit, next) => {
function onFetch (err, issue) {
if (err) {
console.error('Error fetching issue #%s: %s', commit.ghIssue, err.message)
return next()
}
if (issue.labels) {
commit.labels = issue.labels.map((label) => label.name)
}
next()
}
if (commit.ghUser === 'iojs') {
commit.ghUser = 'nodejs' // forcibly rewrite as the GH API doesn't do it for us
}
// To prevent multiple simultaneous requests for the same issue
// from hitting the network at the same time, immediately assign a Promise
// to the cache that all commits with the same ghIssue value will use.
const key = `${commit.ghUser}/${commit.ghProject}#${commit.ghIssue}`
cache[key] = cache[key] || new Promise((resolve, reject) => {
ghissues.get(authData, commit.ghUser, commit.ghProject, commit.ghIssue, (err, issue) => {
if (err) {
return reject(err)
}
resolve(issue)
})
})
cache[key].then((val) => onFetch(null, val), (err) => onFetch(err))
}, 15)
q.drain(callback)
q.push(sublist)
})
}
module.exports = collectCommitLabels