feat: use Arborist for dedupe and prune

1 files changed, 16 insertions, 11 deletions

diff --git a/lib/prune.js b/lib/prune.js
index 6e1cd9318..e675df30d 100644
--- a/lib/prune.js
+++ b/lib/prune.js
@@ -1,20 +1,25 @@
-// prune extraneous packages.
-const util = require('util')
+// prune extraneous packages
+const npm = require('./npm.js')
 const Arborist = require('@npmcli/arborist')
-const rimraf = util.promisify(require('rimraf'))
-const reifyOutput = require('./utils/reify-output.js')
 const usageUtil = require('./utils/usage.js')
 
-const usage = usageUtil('prune',
-  'npm prune [[<@scope>/]<pkg>...] [--production]')
+const reifyOutput = require('./utils/reify-output.js')
 
-const completion = require('./utils/completion/installed-deep.js')
+const usage = usageUtil('prune',
+  'npm prune [[<@scope>/]<pkg>...] [--production]'
+)
+const completion = (cb) => cb(null, [])
 
-const cmd = (args, cb) => prune(args).then(() => cb()).catch(cb)
+const cmd = (args, cb) => prune().then(() => cb()).catch(cb)
 
-const prune = async args => {
-  require('npmlog').warn('coming soon!')
-  throw new Error('not yet implemented')
+const prune = async () => {
+  const where = npm.prefix
+  const arb = new Arborist({
+    ...npm.flatOptions,
+    path: where
+  })
+  await arb.prune()
+  reifyOutput(arb)
 }
 
 module.exports = Object.assign(cmd, { usage, completion })