fix(vhd-lib): create directory for merged blocks

@xen-orchestra/fs/src/abstract.js

@@ -284,15 +284,24 @@ export default class RemoteHandlerAbstract {
     return this._encryptor.decryptData(data)
   }
 
-  async rename(oldPath, newPath, { checksum = false } = {}) {
-    oldPath = normalizePath(oldPath)
-    newPath = normalizePath(newPath)
-
-    let p = timeout.call(this._rename(oldPath, newPath), this._timeout)
-    if (checksum) {
-      p = Promise.all([p, this._rename(checksumFile(oldPath), checksumFile(newPath))])
+  async #rename(oldPath, newPath, { checksum }, createTree = true) {
+    try {
+      let p = timeout.call(this._rename(oldPath, newPath), this._timeout)
+      if (checksum) {
+        p = Promise.all([p, this._rename(checksumFile(oldPath), checksumFile(newPath))])
+      }
+      await p
+    } catch (error) {
+      // ENOENT can be a missing target directory OR a missing source
+      if (error.code === 'ENOENT' && createTree) {
+        await this._mktree(dirname(newPath))
+        return this.#rename(oldPath, newPath, { checksum }, false)
+      }
     }
-    return p
+  }
+
+  rename(oldPath, newPath, { checksum = false } = {}) {
+    return this.#rename(normalizePath(oldPath), normalizePath(newPath), { checksum })
   }
 
   async copy(oldPath, newPath, { checksum = false } = {}) {

@xen-orchestra/fs/src/fs.spec.js

@@ -228,6 +228,17 @@ handlers.forEach(url => {
         expect(await handler.list('.')).toEqual(['file2'])
         expect(await handler.readFile(`file2`)).toEqual(TEST_DATA)
       })
+      it(`should rename the file and create dest directory`, async () => {
+        await handler.outputFile('file', TEST_DATA)
+        await handler.rename('file', `sub/file2`)
+
+        expect(await handler.list('sub')).toEqual(['file2'])
+        expect(await handler.readFile(`sub/file2`)).toEqual(TEST_DATA)
+      })
+      it(`should fail with enoent if source file is missing`, async () => {
+        const error = await rejectionOf(handler.rename('file', `sub/file2`))
+        expect(error.code).toBe('ENOENT')
+      })
     })
 
     describe('#rmdir()', () => {

CHANGELOG.unreleased.md

@@ -15,6 +15,7 @@
 
 - [Dashboard/Health] Fix `Unknown SR` and `Unknown VDI` in Unhealthy VDIs (PR [#6519](https://github.com/vatesfr/xen-orchestra/pull/6519))
 - [Delta Backup] Can now recover VHD merge when failed at the begining
+- [Delta Backup] Fix `ENOENT` errors when merging a VHD directory on non-S3 remote
 
 ### Packages to release
 
@@ -33,6 +34,7 @@
 <!--packages-start-->
 
 - @xen-orchestra/backups-cli major
+- @xen-orchestra/fs minor
 - @xen-orchestra/log minor
 - vhd-lib minor
 - xo-cli patch