fix: make shorter temp file names in the store

close #6842

.changeset/green-donuts-pull.md

@@ -0,0 +1,6 @@
+---
+"@pnpm/store.cafs": patch
+"pnpm": patch
+---
+
+The length of the temporary file names in the content-addressable store reduced in order to prevent `ENAMETOOLONG` errors from happening [#6842](https://github.com/pnpm/pnpm/issues/6842).

store/cafs/src/index.ts

@@ -114,7 +114,7 @@ async function writeBufferToCafs (
     //
     // If we don't allow --no-verify-store-integrity then we probably can write
     // to the final file directly.
-    const temp = pathTemp(fileDest)
+    const temp = pathTemp(removeSuffix(fileDest))
     await writeFile(temp, buffer, mode)
     // Unfortunately, "birth time" (time of file creation) is available not on all filesystems.
     // We log the creation time ourselves and save it in the package index file.
@@ -127,6 +127,12 @@ async function writeBufferToCafs (
   return p
 }
 
+function removeSuffix (filePath: string): string {
+  const dashPosition = filePath.indexOf('-')
+  if (dashPosition === -1) return filePath
+  return filePath.substring(0, dashPosition)
+}
+
 async function existsSame (filename: string, integrity: ssri.IntegrityLike) {
   let existingFile: Stats | undefined
   try {