From 675a46e23e679c294355435584ae662a7c0903c7 Mon Sep 17 00:00:00 2001
From: Dax <mail@thdxr.com>
Date: Thu, 16 Apr 2026 02:03:03 -0400
Subject: CLI perf: reduce deps (#22652)

---
 packages/shared/src/npm.ts | 25 ++++++++++++++++++++-----
 1 file changed, 20 insertions(+), 5 deletions(-)

(limited to 'packages/shared/src/npm.ts')

diff --git a/packages/shared/src/npm.ts b/packages/shared/src/npm.ts
index 8bd0cc468..955cafa19 100644
--- a/packages/shared/src/npm.ts
+++ b/packages/shared/src/npm.ts
@@ -1,6 +1,5 @@
 import path from "path"
 import semver from "semver"
-import { Arborist } from "@npmcli/arborist"
 import { Effect, Schema, Context, Layer, Option, FileSystem } from "effect"
 import { NodeFileSystem } from "@effect/platform-node"
 import { AppFileSystem } from "./filesystem"
@@ -19,8 +18,8 @@ export namespace Npm {
   }
 
   export interface Interface {
-    readonly add: (pkg: string) => Effect.Effect<EntryPoint, InstallFailedError>
-    readonly install: (dir: string) => Effect.Effect<void>
+    readonly add: (pkg: string) => Effect.Effect<EntryPoint, InstallFailedError | EffectFlock.LockError>
+    readonly install: (dir: string, input?: { add: string[] }) => Effect.Effect<void, EffectFlock.LockError>
     readonly outdated: (pkg: string, cachedVersion: string) => Effect.Effect<boolean>
     readonly which: (pkg: string) => Effect.Effect<Option.Option<string>>
   }
@@ -92,6 +91,7 @@ export namespace Npm {
       })
 
       const add = Effect.fn("Npm.add")(function* (pkg: string) {
+        const { Arborist } = yield* Effect.promise(() => import("@npmcli/arborist"))
         const dir = directory(pkg)
         yield* flock.acquire(`npm-install:${dir}`)
 
@@ -133,10 +133,17 @@ export namespace Npm {
         return resolveEntryPoint(first.name, first.path)
       }, Effect.scoped)
 
-      const install = Effect.fn("Npm.install")(function* (dir: string) {
+      const install = Effect.fn("Npm.install")(function* (dir: string, input?: { add: string[] }) {
+        const canWrite = yield* afs.access(dir, { writable: true }).pipe(
+          Effect.as(true),
+          Effect.orElseSucceed(() => false),
+        )
+        if (!canWrite) return
+
         yield* flock.acquire(`npm-install:${dir}`)
 
         const reify = Effect.fnUntraced(function* () {
+          const { Arborist } = yield* Effect.promise(() => import("@npmcli/arborist"))
           const arb = new Arborist({
             path: dir,
             binLinks: true,
@@ -145,7 +152,14 @@ export namespace Npm {
             ignoreScripts: true,
           })
           yield* Effect.tryPromise({
-            try: () => arb.reify().catch(() => {}),
+            try: () =>
+              arb
+                .reify({
+                  add: input?.add || [],
+                  save: true,
+                  saveType: "prod",
+                })
+                .catch(() => {}),
             catch: () => {},
           }).pipe(Effect.orElseSucceed(() => {}))
         })
@@ -167,6 +181,7 @@ export namespace Npm {
           ...Object.keys(pkgAny?.devDependencies || {}),
           ...Object.keys(pkgAny?.peerDependencies || {}),
           ...Object.keys(pkgAny?.optionalDependencies || {}),
+          ...(input?.add || []),
         ])
 
         const root = lockAny?.packages?.[""] || {}
-- 
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