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// dedupe duplicated packages, or find them in the tree
const Arborist = require('@npmcli/arborist')
const reifyFinish = require('./utils/reify-finish.js')
const BaseCommand = require('./base-command.js')
class Dedupe extends BaseCommand {
/* istanbul ignore next - see test/lib/load-all-commands.js */
static get description () {
return 'Reduce duplication in the package tree'
}
/* istanbul ignore next - see test/lib/load-all-commands.js */
static get name () {
return 'dedupe'
}
/* istanbul ignore next - see test/lib/load-all-commands.js */
static get params () {
return [
'global-style',
'legacy-bundling',
'strict-peer-deps',
'package-lock',
'omit',
'ignore-scripts',
'audit',
'bin-links',
'fund',
'dry-run',
]
}
exec (args, cb) {
this.dedupe(args).then(() => cb()).catch(cb)
}
async dedupe (args) {
if (this.npm.config.get('global')) {
const er = new Error('`npm dedupe` does not work in global mode.')
er.code = 'EDEDUPEGLOBAL'
throw er
}
const dryRun = this.npm.config.get('dry-run')
const where = this.npm.prefix
const opts = {
...this.npm.flatOptions,
log: this.npm.log,
path: where,
dryRun,
}
const arb = new Arborist(opts)
await arb.dedupe(opts)
await reifyFinish(this.npm, arb)
}
}
module.exports = Dedupe
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