fix: resolving peer deps with prerelease versions (#7981)

close #7977

.changeset/four-adults-burn.md

@@ -0,0 +1,6 @@
+---
+"@pnpm/resolve-dependencies": patch
+"pnpm": patch
+---
+
+Resolve peer dependencies correctly, when they have prerelease versions [#7977](https://github.com/pnpm/pnpm/issues/7977).

pkg-manager/resolve-dependencies/src/hoistPeers.ts

@@ -0,0 +1,29 @@
+import { type PreferredVersions } from '@pnpm/resolver-base'
+import semver from 'semver'
+
+export function hoistPeers (
+  missingRequiredPeers: Array<[string, { range: string }]>,
+  opts: {
+    autoInstallPeers: boolean
+    allPreferredVersions?: PreferredVersions
+  }
+): Record<string, string> {
+  const dependencies: Record<string, string> = {}
+  for (const [peerName, { range }] of missingRequiredPeers) {
+    if (opts.allPreferredVersions![peerName]) {
+      const versions: string[] = []
+      const nonVersions: string[] = []
+      for (const [spec, specType] of Object.entries(opts.allPreferredVersions![peerName])) {
+        if (specType === 'version') {
+          versions.push(spec)
+        } else {
+          nonVersions.push(spec)
+        }
+      }
+      dependencies[peerName] = [semver.maxSatisfying(versions, '*', { includePrerelease: true }), ...nonVersions].join(' || ')
+    } else if (opts.autoInstallPeers) {
+      dependencies[peerName] = range
+    }
+  }
+  return dependencies
+}

pkg-manager/resolve-dependencies/src/resolveDependencies.ts

@@ -57,6 +57,7 @@ import {
   nodeIdContains,
   splitNodeId,
 } from './nodeIdUtils'
+import { hoistPeers } from './hoistPeers'
 import { wantedDepIsLocallyAvailable } from './wantedDepIsLocallyAvailable'
 import { replaceVersionInPref } from './replaceVersionInPref'
 
@@ -329,23 +330,7 @@ export async function resolveRootDependencies (
         )
       )
       if (!missingRequiredPeers.length && !missingOptionalPeerNames.length) break
-      const dependencies: Record<string, string> = {}
-      for (const [peerName, { range }] of missingRequiredPeers) {
-        if (ctx.allPreferredVersions![peerName]) {
-          const versions: string[] = []
-          const nonVersions: string[] = []
-          for (const [spec, specType] of Object.entries(ctx.allPreferredVersions![peerName])) {
-            if (specType === 'version') {
-              versions.push(spec)
-            } else {
-              nonVersions.push(spec)
-            }
-          }
-          dependencies[peerName] = [semver.maxSatisfying(versions, '*'), ...nonVersions].join(' || ')
-        } else if (ctx.autoInstallPeers) {
-          dependencies[peerName] = range
-        }
-      }
+      const dependencies = hoistPeers(missingRequiredPeers, ctx)
       const nextMissingOptionalPeers: string[] = []
       const optionalDependencies: Record<string, string> = {}
       for (const missingOptionalPeerName of missingOptionalPeerNames) {

pkg-manager/resolve-dependencies/test/hoistPeers.test.ts

@@ -0,0 +1,14 @@
+import { hoistPeers } from '../lib/hoistPeers'
+
+test('hoistPeers picks an already available prerelease version', () => {
+  expect(hoistPeers([['foo', { range: '*' }]], {
+    autoInstallPeers: false,
+    allPreferredVersions: {
+      foo: {
+        '1.0.0-beta.0': 'version',
+      },
+    },
+  })).toStrictEqual({
+    foo: '1.0.0-beta.0',
+  })
+})