feat(fly_check): support flycheck extension

PR: simrat39#379

Author: IWANABETHATGUY

lua/rust-tools/fly_check.lua

@@ -0,0 +1,14 @@
+local M = {}
+
+local function get_params()
+  return {
+    textDocument = vim.lsp.util.make_text_document_params(),
+  }
+end
+
+function M.fly_check()
+  local params = get_params()
+  vim.lsp.buf_notify(0, "rust-analyzer/runFlycheck", params)
+end
+
+return M

lua/rust-tools/init.lua

@@ -55,6 +55,9 @@ function M.setup(opts)
   local external_docs = require("rust-tools.external_docs")
   M.external_docs = external_docs
 
+  local fly_check = require("rust-tools.fly_check")
+  M.fly_check = fly_check
+
   local hover_actions = require("rust-tools.hover_actions")
   M.hover_actions = hover_actions
 

lua/rust-tools/lsp.lua

@@ -41,6 +41,9 @@ local function setup_commands()
       rt.debuggables.debuggables,
     },
     RustExpandMacro = { rt.expand_macro.expand_macro },
+    RustFlyCheck = {
+      rt.fly_check.fly_check,
+    },
     RustOpenExternalDocs = {
       rt.external_docs.open_external_docs,
     },