fix(read-project-manifest): avoid EMFILE errors (#3381)

close #3378

.changeset/friendly-pumas-prove.md

@@ -0,0 +1,5 @@
+---
+"@pnpm/read-project-manifest": patch
+---
+
+Use graceful-fs in order to avoid EMFILE errors.

packages/read-project-manifest/package.json

@@ -33,6 +33,7 @@
     "@pnpm/write-project-manifest": "workspace:2.0.0",
     "detect-indent": "^6.0.0",
     "fast-deep-equal": "^3.1.3",
+    "graceful-fs": "^4.2.6",
     "is-windows": "^1.0.2",
     "json5": "^2.1.3",
     "parse-json": "^5.1.0",

packages/read-project-manifest/src/readFile.ts

@@ -1,9 +1,13 @@
-import { promises as fs } from 'fs'
+import { promisify } from 'util'
+import gracefulFs from 'graceful-fs'
 import { ProjectManifest } from '@pnpm/types'
 import JSON5 from 'json5'
 import parseJson from 'parse-json'
 import stripBom from 'strip-bom'
 
+// We use graceful-fs to avoid EMFILE errors.
+const readFile = promisify(gracefulFs.readFile)
+
 export async function readJson5File (filePath: string) {
   const text = await readFileWithoutBom(filePath)
   try {
@@ -32,5 +36,5 @@ export async function readJsonFile (filePath: string) {
 }
 
 async function readFileWithoutBom (path: string) {
-  return stripBom(await fs.readFile(path, 'utf8'))
+  return stripBom(await readFile(path, 'utf8'))
 }

pnpm-lock.yaml

@@ -2530,6 +2530,7 @@ importers:
       '@types/parse-json': ^4.0.0
       detect-indent: ^6.0.0
       fast-deep-equal: ^3.1.3
+      graceful-fs: ^4.2.6
       is-windows: ^1.0.2
       json5: ^2.1.3
       parse-json: ^5.1.0
@@ -2543,6 +2544,7 @@ importers:
       '@pnpm/write-project-manifest': link:../write-project-manifest
       detect-indent: 6.0.0
       fast-deep-equal: 3.1.3
+      graceful-fs: 4.2.6
       is-windows: 1.0.2
       json5: 2.2.0
       parse-json: 5.2.0