feat: try adding local pre-release package in workspaces

.changeset/tricky-bulldogs-eat.md

@@ -0,0 +1,6 @@
+---
+"@pnpm/npm-resolver": patch
+"pnpm": patch
+---
+
+`pnpm add` should prefer local projects from the workspace, even if they use prerelease versions.

resolving/npm-resolver/src/index.ts

@@ -291,7 +291,9 @@ function pickMatchingLocalVersionOrNull (
   const localVersions = Object.keys(versions)
   switch (spec.type) {
   case 'tag':
-    return semver.maxSatisfying(localVersions, '*')
+    return semver.maxSatisfying(localVersions, '*', {
+      includePrerelease: true,
+    })
   case 'version':
     return versions[spec.fetchSpec] ? spec.fetchSpec : null
   case 'range':

resolving/npm-resolver/test/index.ts

@@ -1317,6 +1317,43 @@ test('resolve from local directory when package is not found in the registry and
   expect(resolveResult!.manifest!.version).toBe('2.0.0')
 })
 
+test('resolve from local directory when package is not found in the registry and local prerelease available', async () => {
+  nock(registry)
+    .get('/is-positive')
+    .reply(404, {})
+
+  const cacheDir = tempy.directory()
+  const resolve = createResolveFromNpm({
+    cacheDir,
+  })
+  const resolveResult = await resolve({ alias: 'is-positive', pref: 'latest' }, {
+    projectDir: '/home/istvan/src',
+    registry,
+    workspacePackages: {
+      'is-positive': {
+        '3.0.0-alpha.1.2.3': {
+          dir: '/home/istvan/src/is-positive',
+          manifest: {
+            name: 'is-positive',
+            version: '3.0.0-alpha.1.2.3',
+          },
+        },
+      },
+    },
+  })
+
+  expect(resolveResult!.resolvedVia).toBe('local-filesystem')
+  expect(resolveResult!.id).toBe('link:is-positive')
+  expect(resolveResult!.latest).toBeFalsy()
+  expect(resolveResult!.resolution).toStrictEqual({
+    directory: '/home/istvan/src/is-positive',
+    type: 'directory',
+  })
+  expect(resolveResult!.manifest).toBeTruthy()
+  expect(resolveResult!.manifest!.name).toBe('is-positive')
+  expect(resolveResult!.manifest!.version).toBe('3.0.0-alpha.1.2.3')
+})
+
 test('resolve from local directory when package is not found in the registry and specific version is requested', async () => {
   nock(registry)
     .get('/is-positive')