fix: installing local dep from directory that starts with @

.changeset/healthy-goats-tell.md

@@ -1,4 +1,5 @@
 ---
+"@pnpm/dependency-path": patch
 "@pnpm/lockfile-file": patch
 "pnpm": patch
 ---

.changeset/short-mirrors-exercise.md

@@ -0,0 +1,5 @@
+---
+"@pnpm/dependency-path": minor
+---
+
+Export `indexOfPeersSuffix`.

.changeset/wise-actors-fix.md

@@ -0,0 +1,6 @@
+---
+"@pnpm/lockfile-file": patch
+"pnpm": patch
+---
+
+Installation should not fail when there is a local dependency that starts in a directory that starts with the `@` char [#6332](https://github.com/pnpm/pnpm/issues/6332).

lockfile/lockfile-file/src/experiments/inlineSpecifiersLockfileConverters.ts

@@ -159,12 +159,10 @@ export function revertFromInlineSpecifiersFormat (lockfile: InlineSpecifiersLock
   return newLockfile
 }
 
-const PEERS_SUFFIX_REGEX = /(\([^)]+\))+$/
-
 export function convertLockfileV6DepPathToV5DepPath (newDepPath: string) {
-  if (!newDepPath.includes('@', 2)) return newDepPath
+  if (!newDepPath.includes('@', 2) || newDepPath.startsWith('file:')) return newDepPath
   const index = newDepPath.indexOf('@', newDepPath.indexOf('/@') + 2)
-  if (newDepPath.includes('(') && index > newDepPath.search(PEERS_SUFFIX_REGEX)) return newDepPath
+  if (newDepPath.includes('(') && index > dp.indexOfPeersSuffix(newDepPath)) return newDepPath
   return `${newDepPath.substring(0, index)}/${newDepPath.substring(index + 1)}`
 }
 

packages/dependency-path/src/index.ts

@@ -26,13 +26,29 @@ export function resolve (
   return resolutionLocation
 }
 
+export function indexOfPeersSuffix (depPath: string) {
+  if (!depPath.endsWith(')')) return -1
+  let open = true
+  for (let i = depPath.length - 2; i >= 0; i--) {
+    if (depPath[i] === '(') {
+      open = false
+    } else if (depPath[i] === ')') {
+      if (open) return -1
+      open = true
+    } else if (!open) {
+      return i + 1
+    }
+  }
+  return -1
+}
+
 export function tryGetPackageId (registries: Registries, relDepPath: string) {
   if (relDepPath[0] !== '/') {
     return null
   }
-  const sepIndex = relDepPath.indexOf('(')
+  const sepIndex = indexOfPeersSuffix(relDepPath)
   if (sepIndex !== -1) {
-    return resolve(registries, relDepPath.slice(0, sepIndex))
+    return resolve(registries, relDepPath.substring(0, sepIndex))
   }
   const underscoreIndex = relDepPath.indexOf('_', relDepPath.lastIndexOf('/'))
   if (underscoreIndex !== -1) {

packages/dependency-path/test/index.ts

@@ -180,4 +180,5 @@ test('depPathToFilename()', () => {
 test('tryGetPackageId', () => {
   expect(tryGetPackageId({ default: 'https://registry.npmjs.org/' }, '/foo/1.0.0_@types+babel__core@7.1.14')).toEqual('registry.npmjs.org/foo/1.0.0')
   expect(tryGetPackageId({ default: 'https://registry.npmjs.org/' }, '/foo/1.0.0(@types/babel__core@7.1.14)')).toEqual('registry.npmjs.org/foo/1.0.0')
+  expect(tryGetPackageId({ default: 'https://registry.npmjs.org/' }, '/@(-.-)/foo/1.0.0(@types/babel__core@7.1.14)')).toEqual('registry.npmjs.org/@(-.-)/foo/1.0.0')
 })