Make v4::load_dump copy each part a the dump

meilisearch-lib/src/dump/loaders/v4.rs

@@ -1,6 +1,9 @@
+use std::fs;
 use std::path::Path;
 
+use fs_extra::dir::{self, CopyOptions};
 use log::info;
+use tempfile::tempdir;
 
 use crate::dump::Metadata;
 use crate::options::IndexerOpts;
@@ -15,9 +18,36 @@ pub fn load_dump(
 ) -> anyhow::Result<()> {
     info!("Patching dump V4 to dump V5...");
 
+    let patched_dir = tempdir()?;
+    let options = CopyOptions::default();
+
+    // Indexes
+    dir::copy(src.as_ref().join("indexes"), patched_dir.path(), &options)?;
+
+    // Index uuids
+    dir::copy(
+        src.as_ref().join("index_uuids"),
+        patched_dir.path(),
+        &options,
+    )?;
+
+    // Metadata
+    fs::copy(
+        src.as_ref().join("metadata.json"),
+        patched_dir.path().join("metadata.json"),
+    )?;
+
+    // Updates
+    dir::copy(src.as_ref().join("updates"), patched_dir.path(), &options)?;
+
+    // Keys
+    if src.as_ref().join("keys").exists() {
+        fs::copy(src.as_ref().join("keys"), patched_dir.path().join("keys"))?;
+    }
+
     super::v5::load_dump(
         meta,
-        src,
+        patched_dir.path(),
         dst,
         index_db_size,
         meta_env_size,