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init.js
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init.js
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const fs = require('fs')
const path = require('path')
const cp = require('child_process')
function git (...args) {
return cp.spawnSync('git', args)
}
async function fallback () {
await fs.promises.copyFile(path.join(__dirname, 'TEMPLATE_CHANGELOG.md'), 'CHANGELOG.md')
await fs.promises.appendFile('CHANGELOG.md', `
## [1.0.0] - DATE
* Initial release.
`)
console.log('Created empty `CHANGELOG.md`')
}
async function init (formatFile) {
if (fs.existsSync('CHANGELOG.md')) {
throw new Error('`CHANGELOG.md` already exists!')
}
// Outputs tag (not full ref path), 4 spaces, and date string
const tagOut = git('tag', '--format', '%(refname:strip=2) %(creatordate)')
if (tagOut.status > 0) {
return await fallback()
}
const allTags = tagOut.stdout.toString().trim().split('\n').map(t => t.split(' '))
const tags = allTags.filter(([tag, date]) => tag.match(/^v?\d+(\.\d+)*$/)).reverse()
if (tags.length < 1) {
return await fallback()
}
const history = tags.map(([tag, date]) => {
const version = tag.replace(/^v/, '')
// `sv` is nearly like ISO but will keep the local time
const isoDate = new Date(date).toLocaleString('sv').split(' ')[0]
return `## [${version}] - ${isoDate}\n`
})
history[history.length - 1] += '* Initial release.'
await fs.promises.copyFile(path.join(__dirname, 'TEMPLATE_CHANGELOG.md'), 'CHANGELOG.md')
await fs.promises.appendFile('CHANGELOG.md', '\n' + history.join('\n'))
// Dogfooding process and write file to automatically add Git URLs
await formatFile('CHANGELOG.md', true)
console.log('Created `CHANGELOG.md` from Git tags')
}
module.exports = init