enable all features for cargo

nix/base-system/init.lua

@@ -195,6 +195,12 @@ lspconfig.tsserver.setup {
 
 -- Rust language server support
 lspconfig.rust_analyzer.setup {
+    settings = {
+        -- https://github.com/rust-lang/rust-analyzer/blob/master/docs/user/generated_config.adoc
+      ['rust-analyzer'] = {
+        cargo = { features = "all" }
+      }
+    },
     capabilities = caps
 }