Add rust-analyzer

lua/config/lsp/init.lua

@@ -7,6 +7,7 @@ require("config.lsp.pyright")
 require("config.lsp.clangd")
 require("config.lsp.vls")
 require("config.lsp.lua_ls")
+require("config.lsp.rust_analyzer")
 
 local api = vim.api
 local keymap = vim.keymap.set

lua/config/lsp/rust_analyzer.lua

@@ -0,0 +1,39 @@
+local bin_name = "rust-analyzer"
+local cmd = { bin_name }
+
+local config = vim.fs.find("Cargo.toml", {
+  upward = true,
+  stop = vim.loop.os_homedir(),
+  path = vim.fs.dirname(vim.api.nvim_buf_get_name(0)),
+})
+
+if next(config) then
+  vim.api.nvim_create_autocmd("FileType", {
+    pattern = "rust",
+    callback = function()
+      vim.lsp.start({
+        name = "rust-analyzer",
+        cmd = cmd,
+        root_dir = config[1],
+        settings = {
+          ["rust-analyzer"] = {
+            checkOnSave = {
+              command = "clippy"
+            },
+            check = {
+              command = "check"
+            },
+          },
+        },
+        capabilities = vim.lsp.protocol.make_client_capabilities(),
+      })
+    end,
+  })
+
+  vim.api.nvim_create_autocmd("BufWritePre", {
+    pattern = "*.rs",
+    callback = function()
+      vim.lsp.buf.format({ timeout_ms = 2000 })
+    end,
+  })
+end