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const log = require('npmlog')
const fs = require('fs')
const parseJSON = require('json-parse-even-better-errors')
const rpj = require('read-package-json-fast')
const BaseCommand = require('./base-command.js')
class SetScript extends BaseCommand {
/* istanbul ignore next - see test/lib/load-all-commands.js */
static get description () {
return 'Set tasks in the scripts section of package.json'
}
/* istanbul ignore next - see test/lib/load-all-commands.js */
static get name () {
return 'set-script'
}
/* istanbul ignore next - see test/lib/load-all-commands.js */
static get usage () {
return ['[<script>] [<command>]']
}
exec (args, cb) {
this.set(args).then(() => cb()).catch(cb)
}
async set (args) {
if (process.env.npm_lifecycle_event === 'postinstall')
throw new Error('Scripts can’t set from the postinstall script')
// Parse arguments
if (args.length !== 2)
throw new Error(`Expected 2 arguments: got ${args.length}`)
// Set the script
let manifest
let warn = false
try {
manifest = fs.readFileSync(this.npm.localPrefix + '/package.json', 'utf-8')
} catch (error) {
throw new Error('package.json not found')
}
try {
manifest = parseJSON(manifest)
} catch (error) {
throw new Error(`Invalid package.json: ${error}`)
}
if (!manifest.scripts)
manifest.scripts = {}
if (manifest.scripts[args[0]] && manifest.scripts[args[0]] !== args[1])
warn = true
manifest.scripts[args[0]] = args[1]
// format content
const packageJsonInfo = await rpj(this.npm.localPrefix + '/package.json')
const {
[Symbol.for('indent')]: indent,
[Symbol.for('newline')]: newline,
} = packageJsonInfo
const format = indent === undefined ? ' ' : indent
const eol = newline === undefined ? '\n' : newline
const content = (JSON.stringify(manifest, null, format) + '\n')
.replace(/\n/g, eol)
fs.writeFileSync(this.npm.localPrefix + '/package.json', content)
if (warn)
log.warn('set-script', `Script "${args[0]}" was overwritten`)
}
}
module.exports = SetScript
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