fix: pnpm link --global <pkg> should not change the type of the dependency

.changeset/lazy-days-run.md

@@ -0,0 +1,5 @@
+---
+"@pnpm/types": minor
+---
+
+New type exported: DependenciesOrPeersField

.changeset/odd-peas-fetch.md

@@ -0,0 +1,6 @@
+---
+"pnpm": patch
+"@pnpm/core": patch
+---
+
+`pnpm link --global <pkg>` should not change the type of the dependency [#5478](https://github.com/pnpm/pnpm/issues/5478).

.changeset/ten-dancers-happen.md

@@ -0,0 +1,5 @@
+---
+"@pnpm/manifest-utils": minor
+---
+
+New function exported: `getDependencyTypeFromManifest()`.

packages/core/src/link/index.ts

@@ -15,6 +15,7 @@ import { logger, streamParser } from '@pnpm/logger'
 import {
   getPref,
   getSpecFromPackageManifest,
+  getDependencyTypeFromManifest,
   guessDependencyType,
   PackageSpecObject,
   updateProjectManifestObject,
@@ -74,12 +75,14 @@ export async function link (
       throw new PnpmError('INVALID_PACKAGE_NAME', `Package in ${linkFromPath} must have a name field to be linked`)
     }
 
+    const targetDependencyType = getDependencyTypeFromManifest(opts.manifest, manifest.name) ?? opts.targetDependenciesField
+
     specsToUpsert.push({
       alias: manifest.name,
       pref: getPref(manifest.name, manifest.name, manifest.version, {
         pinnedVersion: opts.pinnedVersion,
       }),
-      saveType: (opts.targetDependenciesField ?? (ctx.manifest && guessDependencyType(manifest.name, ctx.manifest))) as DependenciesField,
+      saveType: (targetDependencyType ?? (ctx.manifest && guessDependencyType(manifest.name, ctx.manifest))) as DependenciesField,
     })
 
     const packagePath = normalize(path.relative(opts.dir, linkFromPath))
@@ -108,8 +111,9 @@ export async function link (
   for (const { alias, manifest, path } of linkedPkgs) {
     // TODO: cover with test that linking reports with correct dependency types
     const stu = specsToUpsert.find((s) => s.alias === manifest.name)
+    const targetDependencyType = getDependencyTypeFromManifest(opts.manifest, manifest.name) ?? opts.targetDependenciesField
     await symlinkDirectRootDependency(path, destModules, alias, {
-      fromDependenciesField: stu?.saveType ?? opts.targetDependenciesField,
+      fromDependenciesField: stu?.saveType ?? (targetDependencyType as DependenciesField),
       linkedPackage: manifest,
       prefix: opts.dir,
     })

packages/core/test/link.ts

@@ -210,6 +210,30 @@ test('throws error is package name is not defined', async () => {
   }
 })
 
+test('link should not change the type of the dependency', async () => {
+  const project = prepareEmpty()
+
+  const linkedPkgName = 'hello-world-js-bin'
+  const linkedPkgPath = path.resolve('..', linkedPkgName)
+
+  f.copy(linkedPkgName, linkedPkgPath)
+  await link([`../${linkedPkgName}`], path.join(process.cwd(), 'node_modules'), await testDefaults({
+    dir: process.cwd(),
+    manifest: {
+      devDependencies: {
+        '@pnpm.e2e/hello-world-js-bin': '*',
+      },
+    },
+  }))
+
+  await project.isExecutable('.bin/hello-world-js-bin')
+
+  const wantedLockfile = await project.readLockfile()
+  expect(wantedLockfile.devDependencies).toStrictEqual({
+    '@pnpm.e2e/hello-world-js-bin': 'link:../hello-world-js-bin',
+  })
+})
+
 // test.skip('relative link when an external lockfile is used', async () => {
 //   const projects = prepare(t, [
 //     {

packages/manifest-utils/src/getAllDependenciesFromManifest.ts

@@ -1,7 +1,7 @@
-import { Dependencies, ProjectManifest } from '@pnpm/types'
+import { Dependencies, DependenciesField, ProjectManifest } from '@pnpm/types'
 
 export function getAllDependenciesFromManifest (
-  pkg: Pick<ProjectManifest, 'devDependencies' | 'dependencies' | 'optionalDependencies'>
+  pkg: Pick<ProjectManifest, DependenciesField>
 ): Dependencies {
   return {
     ...pkg.devDependencies,

packages/manifest-utils/src/getDependencyTypeFromManifest.ts

@@ -0,0 +1,12 @@
+import { ProjectManifest, DependenciesOrPeersField } from '@pnpm/types'
+
+export function getDependencyTypeFromManifest (
+  manifest: Pick<ProjectManifest, DependenciesOrPeersField>,
+  depName: string
+): DependenciesOrPeersField | null {
+  if (manifest.optionalDependencies?.[depName]) return 'optionalDependencies'
+  if (manifest.dependencies?.[depName]) return 'dependencies'
+  if (manifest.devDependencies?.[depName]) return 'devDependencies'
+  if (manifest.peerDependencies?.[depName]) return 'peerDependencies'
+  return null
+}

packages/manifest-utils/src/getSpecFromPackageManifest.ts

@@ -1,7 +1,7 @@
-import { ProjectManifest } from '@pnpm/types'
+import { ProjectManifest, DependenciesOrPeersField } from '@pnpm/types'
 
 export function getSpecFromPackageManifest (
-  manifest: Pick<ProjectManifest, 'devDependencies' | 'dependencies' | 'optionalDependencies' | 'peerDependencies'>,
+  manifest: Pick<ProjectManifest, DependenciesOrPeersField>,
   depName: string
 ) {
   return manifest.optionalDependencies?.[depName] ??

packages/manifest-utils/src/index.ts

@@ -7,6 +7,7 @@ import { getSpecFromPackageManifest } from './getSpecFromPackageManifest'
 
 export * from './getPref'
 export * from './updateProjectManifestObject'
+export * from './getDependencyTypeFromManifest'
 
 export { getSpecFromPackageManifest }
 

packages/manifest-utils/test/getDependencyTypeFromManifest.test.ts

@@ -0,0 +1,38 @@
+import { getDependencyTypeFromManifest } from '@pnpm/manifest-utils'
+
+test('getDependencyTypeFromManifest()', () => {
+  expect(
+    getDependencyTypeFromManifest({
+      dependencies: {
+        foo: '1.0.0',
+      },
+    }, 'foo')).toEqual('dependencies')
+
+  expect(
+    getDependencyTypeFromManifest({
+      devDependencies: {
+        foo: '1.0.0',
+      },
+    }, 'foo')).toEqual('devDependencies')
+
+  expect(
+    getDependencyTypeFromManifest({
+      optionalDependencies: {
+        foo: '1.0.0',
+      },
+    }, 'foo')).toEqual('optionalDependencies')
+
+  expect(
+    getDependencyTypeFromManifest({
+      peerDependencies: {
+        foo: '1.0.0',
+      },
+    }, 'foo')).toEqual('peerDependencies')
+
+  expect(
+    getDependencyTypeFromManifest({
+      peerDependencies: {
+        foo: '1.0.0',
+      },
+    }, 'bar')).toEqual(null)
+})

packages/types/src/misc.ts

@@ -1,5 +1,7 @@
 export type DependenciesField = 'optionalDependencies' | 'dependencies' | 'devDependencies'
 
+export type DependenciesOrPeersField = DependenciesField | 'peerDependencies'
+
 // NOTE: The order in this array is important.
 export const DEPENDENCIES_FIELDS: DependenciesField[] = [
   'optionalDependencies',