Support some standard code actions, filter out rust-analyzer custom ones

lib/index.js

@@ -182,7 +182,7 @@ async function serverEnv(toolchain, cwd) {
   env.RUST_BACKTRACE = env.RUST_BACKTRACE || "1"
 
   // if (!env.RUST_LOG && atom.config.get('core.debugLSP')) {
-  //   env.RUST_LOG = 'rls=warn,rls::build=info'
+  //   env.RUST_LOG = 'info'
   // }
 
   try {
@@ -505,9 +505,9 @@ class RustLanguageClient extends AutoLanguageClient {
       !filePath.includes('/target/release/')
   }
 
-  // Killing servers is faster and less likely to get stuck.
+  // Killing servers is faster and less likely to get stuck, but let's see if rust-analyzer deserves grace...
   shutdownServersGracefully() {
-    return false
+    return true
   }
 
   // Can click through to out-of-project files.
@@ -576,6 +576,24 @@ class RustLanguageClient extends AutoLanguageClient {
     return provide
   }
 
+  /**
+   * Hide unsupported rust-analyzer custom actions
+   * @param {(ls.Command | ls.CodeAction)[]} actions
+   * @returns {(ls.Command | ls.CodeAction)[]} filtered actions
+   */
+  filterCodeActions(actions) {
+    return actions.filter(a => !a.command || a.command.command !== "rust-analyzer.applySourceChange")
+  }
+
+  // /**
+  //  * TODO: Handle rust-analyzer custom actions
+  //  * @param {(ls.Command | ls.CodeAction)} action
+  //  * @returns {Promise<boolean>} continue with default handling
+  //  */
+  // async onApplyCodeActions(action) {
+  //   return true
+  // }
+
   /**
    * Extend base-class to workaround the limited markdown support.
    * @param {TextEditor} editor