feat(lockfile.fs): export writeLockfileFile and convertToLockfileFile (#8735)

.changeset/flat-ways-develop.md

@@ -0,0 +1,5 @@
+---
+"@pnpm/lockfile.fs": minor
+---
+
+Export `writeLockfileFile` and `convertToLockfileFile`.

lockfile/fs/src/index.ts

@@ -3,9 +3,11 @@ export {
   writeLockfiles,
   writeCurrentLockfile,
   writeWantedLockfile,
+  writeLockfileFile,
 } from './write'
 export { existsNonEmptyWantedLockfile } from './existsWantedLockfile'
 export { getLockfileImporterId } from './getLockfileImporterId'
 export * from '@pnpm/lockfile.types'
 export * from './read'
 export { cleanGitBranchLockfiles } from './gitBranchLockfile'
+export { convertToLockfileFile } from './lockfileFormatConverters'

lockfile/fs/src/write.ts

@@ -60,9 +60,14 @@ async function writeLockfile (
   const lockfilePath = path.join(pkgPath, lockfileFilename)
 
   const lockfileToStringify = convertToLockfileFile(wantedLockfile)
+  return writeLockfileFile(lockfilePath, lockfileToStringify)
+}
 
-  const yamlDoc = yamlStringify(lockfileToStringify)
-
+export function writeLockfileFile (
+  lockfilePath: string,
+  wantedLockfile: LockfileFile
+): Promise<void> {
+  const yamlDoc = yamlStringify(wantedLockfile)
   return writeFileAtomic(lockfilePath, yamlDoc)
 }