add the log_level variable to the cli and reduce the log level of milli and grenad

meilisearch-http/src/main.rs

@@ -19,8 +19,12 @@ const SENTRY_DSN: &str = "https://5ddfa22b95f241198be2271aaf028653@sentry.io/306
 async fn main() -> Result<(), MainError> {
     let opt = Opt::from_args();
 
-    let mut log_builder =
-        env_logger::Builder::from_env(env_logger::Env::default().default_filter_or("info"));
+    let mut log_builder = env_logger::Builder::new();
+    log_builder.parse_filters(&opt.log_level);
+    if opt.log_level == "info"  {
+        // if we are in info we only allow the warn log_level for milli
+        log_builder.filter_module("milli", log::LevelFilter::Warn);
+    }
 
     match opt.env.as_ref() {
         "production" => {

meilisearch-http/src/option.rs

@@ -188,6 +188,10 @@ pub struct Opt {
     #[structopt(long, conflicts_with = "import-snapshot")]
     pub import_dump: Option<PathBuf>,
 
+    /// Set the log level
+    #[structopt(long, env = "MEILI_LOG_LEVEL", default_value = "info")]
+    pub log_level: String,
+
     #[structopt(skip)]
     pub indexer_options: IndexerOpts,
 }

meilisearch-http/tests/common/server.rs

@@ -91,5 +91,6 @@ pub fn default_settings(dir: impl AsRef<Path>) -> Opt {
         snapshot_interval_sec: 0,
         import_dump: None,
         indexer_options: IndexerOpts::default(),
+        log_level: "off".into(),
     }
 }