feat: don't resolve peer dependencies from workspace root

.changeset/nice-comics-fly.md

@@ -0,0 +1,8 @@
+---
+"@pnpm/core": major
+"@pnpm/plugin-commands-installation": major
+"pnpm": major
+"@pnpm/resolve-dependencies": major
+---
+
+Dependencies of the root workspace project are not used to resolve peer dependencies of other workspace projects.

packages/core/test/install/peerDependencies.ts

@@ -224,92 +224,6 @@ test('strict-peer-dependencies: error is thrown when cannot resolve peer depende
   })
 })
 
-test('peer dependency is resolved from the dependencies of the workspace root project', async () => {
-  const projects = preparePackages([
-    {
-      location: '.',
-      package: { name: 'root' },
-    },
-    {
-      location: 'pkg',
-      package: {},
-    },
-  ])
-  const reporter = jest.fn()
-  await mutateModules([
-    {
-      buildIndex: 0,
-      manifest: {
-        name: 'root',
-        version: '1.0.0',
-
-        dependencies: {
-          ajv: '4.10.0',
-        },
-      },
-      mutation: 'install',
-      rootDir: process.cwd(),
-    },
-    {
-      buildIndex: 0,
-      manifest: {
-        name: 'pkg',
-        version: '1.0.0',
-
-        dependencies: {
-          'ajv-keywords': '1.5.0',
-        },
-      },
-      mutation: 'install',
-      rootDir: path.resolve('pkg'),
-    },
-  ], await testDefaults({ reporter }))
-
-  expect(reporter).not.toHaveBeenCalledWith(expect.objectContaining({
-    name: 'pnpm:peer-dependency-issues',
-  }))
-
-  {
-    const lockfile = await projects.root.readLockfile()
-    expect(lockfile.importers.pkg?.dependencies?.['ajv-keywords']).toBe('1.5.0_ajv@4.10.0')
-  }
-
-  await mutateModules([
-    {
-      buildIndex: 0,
-      manifest: {
-        name: 'root',
-        version: '1.0.0',
-
-        dependencies: {
-          ajv: '4.10.0',
-        },
-      },
-      mutation: 'install',
-      rootDir: process.cwd(),
-    },
-    {
-      buildIndex: 0,
-      manifest: {
-        name: 'pkg',
-        version: '1.0.0',
-
-        dependencies: {
-          'ajv-keywords': '1.5.0',
-          'is-positive': '1.0.0',
-        },
-      },
-      mutation: 'install',
-      rootDir: path.resolve('pkg'),
-    },
-  ], await testDefaults({ reporter }))
-
-  {
-    const lockfile = await projects.root.readLockfile()
-    expect(lockfile.importers.pkg?.dependencies?.['ajv-keywords']).toBe('1.5.0_ajv@4.10.0')
-  }
-})
-
 test('warning is reported when cannot resolve peer dependency for non-top-level dependency', async () => {
   prepareEmpty()
   await addDistTag({ package: 'abc-parent-with-ab', version: '1.0.0', distTag: 'latest' })

packages/plugin-commands-installation/src/recursive.ts

@@ -262,19 +262,6 @@ export default async function recursive (
         } as MutatedProject)
       }
     }))
-    if (!opts.selectedProjectsGraph[opts.workspaceDir] && manifestsByPath[opts.workspaceDir] != null) {
-      const localConfig = await memReadLocalConfig(opts.workspaceDir)
-      const modulesDir = localConfig.modulesDir ?? opts.modulesDir
-      const { manifest, writeProjectManifest } = manifestsByPath[opts.workspaceDir]
-      writeProjectManifests.push(writeProjectManifest)
-      mutatedImporters.push({
-        buildIndex: 0,
-        manifest,
-        modulesDir,
-        mutation: 'install',
-        rootDir: opts.workspaceDir,
-      } as MutatedProject)
-    }
     if ((mutatedImporters.length === 0) && cmdFullName === 'update' && opts.depth === 0) {
       throw new PnpmError('NO_PACKAGE_IN_DEPENDENCIES',
         'None of the specified packages were found in the dependencies of any of the projects.')

packages/pnpm/test/monorepo/index.ts

@@ -1498,32 +1498,3 @@ test('pnpm run should include the workspace root when --workspace-root option is
   expect(await exists('test')).toBeTruthy()
   expect(await exists('project/test')).toBeTruthy()
 })
-
-test('peer dependencies are resolved from the root of the workspace when a new dependency is added to a workspace project', async () => {
-  const projects = preparePackages([
-    {
-      location: '.',
-      package: {
-        name: 'project-1',
-        version: '1.0.0',
-
-        dependencies: {
-          ajv: '4.10.4',
-        },
-      },
-    },
-    {
-      name: 'project-2',
-      version: '1.0.0',
-    },
-  ])
-
-  await writeYamlFile('pnpm-workspace.yaml', { packages: ['**', '!store/**'] })
-
-  process.chdir('project-2')
-
-  await execPnpm(['add', 'ajv-keywords@1.5.0', '--strict-peer-dependencies'])
-
-  const lockfile = await projects['project-1'].readLockfile()
-  expect(lockfile.packages).toHaveProperty(['/ajv-keywords/1.5.0_ajv@4.10.4'])
-})

packages/resolve-dependencies/src/resolvePeers.ts

@@ -67,16 +67,11 @@ export default function<T extends PartialResolvedPackage> (
   const depGraph: GenericDependenciesGraph<T> = {}
   const pathsByNodeId = {}
   const _createPkgsByName = createPkgsByName.bind(null, opts.dependenciesTree)
-  const rootProject = opts.projects.length > 1 ? opts.projects.find(({ id }) => id === '.') : null
-  const rootPkgsByName = rootProject == null ? {} : _createPkgsByName(rootProject)
   const peerDependencyIssuesByProjects: PeerDependencyIssuesByProjects = {}
 
   for (const { directNodeIdsByAlias, topParents, rootDir, id } of opts.projects) {
     const peerDependencyIssues: Pick<PeerDependencyIssues, 'bad' | 'missing'> = { bad: {}, missing: {} }
-    const pkgsByName = {
-      ...rootPkgsByName,
-      ..._createPkgsByName({ directNodeIdsByAlias, topParents }),
-    }
+    const pkgsByName = _createPkgsByName({ directNodeIdsByAlias, topParents })
 
     resolvePeersOfChildren(directNodeIdsByAlias, pkgsByName, {
       dependenciesTree: opts.dependenciesTree,