Fix missing distribution

Author: orf

README.md

@@ -1,2 +1,15 @@
 # esdump-rs
 
+Dump elasticsearch indexes to blob storage, really-really fast :rocket:
+
+## Installation
+
+**Releases:** Grab a pre-built executable [from the releases page](https://github.com/GitGuardian/esdump-rs/releases)
+
+**Docker:** `docker run ghcr.io/gitguardian/esdump-rs:latest`
+
+## Usage
+
+```shell
+cargo run --profile release http://localhost:9200 --index=test-index --batches-per-file=5 --batch-size=5000 s3://es-dump/test/ --env-file=test.env --concurrency=10
+```

src/elasticsearch.rs

@@ -39,7 +39,7 @@ pub struct ClusterInfo {
 
 #[derive(Deserialize, Debug)]
 pub struct ClusterVersion {
-    pub distribution: ElasticDistribution,
+    pub distribution: Option<ElasticDistribution>,
 }
 
 #[derive(Deserialize, Debug)]
@@ -121,7 +121,7 @@ impl ElasticsearchClient {
                     "Distribution detected: {:?}",
                     cluster_info.version.distribution
                 );
-                cluster_info.version.distribution
+                cluster_info.version.distribution.unwrap_or(ElasticDistribution::Elasticsearch)
             }
         };