feat(neovim-rust): Rust LSP, debugging, testing and keymaps

- `rustaceanvim` for LSP config
- Rust ft specific keymaps in `after/ftplugin`
- `nvim-dap` for Rust debugging with codelldb
- `rustaceanvim.neotest` for Rust testing
- `rcasia/neotest-bash` for Bash testing
- Better keymaps for running tests
- Inlay hint UI improvements

common/.config/nvim/after/ftplugin/rust.lua

@@ -1,23 +1,10 @@
--- TODO: Map all native Nvim 0.11 LSP commands to corresponding rustaceanvim ones
--- grn -> Rename
--- grr -> References
--- gri -> Implementation
--- gO -> document_symbol
--- gra -> code_action
--- Mine
--- F2 -> Rename
--- gD -> Go to definition
--- <leader>cr -> References
--- <leader>co -> document_symbol
-
 if pcall(require, "rustaceanvim") then
     local bufnr = vim.api.nvim_get_current_buf()
-
-    vim.keymap.set("n", "<C-.>", function()
-        vim.cmd.RustLsp("codeAction")
-    end, { silent = true, buffer = bufnr })
-
-    vim.keymap.set("n", "K", function()
-        vim.cmd.RustLsp({ "hover", "actions" })
-    end, { silent = true, buffer = bufnr })
+    vim.keymap.set("n", "gC", "<cmd>RustLsp openCargo<cr>", { desc = "Open Cargo.toml", buffer = bufnr })
+    vim.keymap.set("n", "<leader>rm", "<cmd>RustLsp expandMacro<cr>", { desc = "Expand Macro", buffer = bufnr })
+    vim.keymap.set("n", "<leader>rp", "<cmd>RustLsp parentModule<cr>", { desc = "Parent Module", buffer = bufnr })
+    vim.keymap.set("n", "<leader>rJ", "<cmd>RustLsp joinLines<cr>", { desc = "Join Lines", buffer = bufnr })
+    vim.keymap.set("n", "<leader>rh", "<cmd>RustLsp openDocs<cr>", { desc = "Open docs.rs Documentation" })
+    vim.keymap.set("n", "<leader>rM", "<cmd>RustLsp view mir<cr>", { desc = "View Mid-Level IR", buffer = bufnr })
+    vim.keymap.set("n", "<leader>rH", "<cmd>RustLsp view hir<cr>", { desc = "View High-Level IR", buffer = bufnr })
 end

common/.config/nvim/lua/core/lsp.lua

@@ -102,7 +102,8 @@ vim.api.nvim_create_autocmd("LspAttach", {
 
         -- Native lsp inline virtual text / inlay hints
         if client and client.supports_method(vim.lsp.protocol.Methods.textDocument_inlayHint) then
-            vim.lsp.inlay_hint.enable()
+            vim.lsp.inlay_hint.enable(true)
+            vim.api.nvim_set_hl(0, "LspInlayHint", { fg = "#5c7086", bg = "NONE" })
 
             map("<leader>ch", function()
                 vim.lsp.inlay_hint.enable(not vim.lsp.inlay_hint.is_enabled({ bufnr = event.buf }))

common/.config/nvim/lua/plugins/code-debug.lua

@@ -1 +1,172 @@
-return {}
+return {
+    "mfussenegger/nvim-dap",
+    dependencies = {
+        -- Creates a beautiful debugger UI
+        "rcarriga/nvim-dap-ui",
+
+        -- Required dependency for nvim-dap-ui
+        "nvim-neotest/nvim-nio",
+
+        -- Auto-installs debugger adapters
+        "mason-org/mason.nvim",
+        "jay-babu/mason-nvim-dap.nvim",
+
+        -- Shows variable values inline as virtual text
+        "theHamsta/nvim-dap-virtual-text",
+    },
+    keys = {
+        {
+            "<F5>",
+            function()
+                require("dap").continue()
+            end,
+            desc = "Debug: Start/Continue",
+        },
+        {
+            "<leader>Ds",
+            function()
+                require("dap").continue()
+            end,
+            desc = "Debug: Start/Continue",
+        },
+        {
+            "<F11>",
+            function()
+                require("dap").step_into()
+            end,
+            desc = "Debug: Step Into",
+        },
+        {
+            "<leader>Di",
+            function()
+                require("dap").step_into()
+            end,
+            desc = "Debug: Step Into",
+        },
+        {
+            "<F10>",
+            function()
+                require("dap").step_over()
+            end,
+            desc = "Debug: Step Over",
+        },
+        {
+            "<leader>Do",
+            function()
+                require("dap").step_over()
+            end,
+            desc = "Debug: Step Over",
+        },
+        {
+            "<S-F11>",
+            function()
+                require("dap").step_out()
+            end,
+            desc = "Debug: Step Out",
+        },
+        {
+            "<leader>DO",
+            function()
+                require("dap").step_out()
+            end,
+            desc = "Debug: Step Out",
+        },
+        {
+            "<F9>",
+            function()
+                require("dap").toggle_breakpoint()
+            end,
+            desc = "Debug: Toggle Breakpoint",
+        },
+        {
+            "<leader>Db",
+            function()
+                require("dap").toggle_breakpoint()
+            end,
+            desc = "Debug: Toggle Breakpoint",
+        },
+        {
+            "<leader>DB",
+            function()
+                require("dap").set_breakpoint(vim.fn.input("Breakpoint condition: "))
+            end,
+            desc = "Debug: Set Conditional Breakpoint",
+        },
+        {
+            "<leader>Dt",
+            function()
+                require("dapui").toggle()
+            end,
+            desc = "Debug: Toggle UI",
+        },
+        {
+            "<leader>Dl",
+            function()
+                require("dap").run_last()
+            end,
+            desc = "Debug: Run Last Configuration",
+        },
+    },
+    config = function()
+        local dap = require("dap")
+        local dapui = require("dapui")
+
+        -- optional
+        require("mason-nvim-dap").setup({
+            automatic_installation = true,
+            handlers = {},
+            ensure_installed = {
+                "codelldb",
+            },
+        })
+
+        -- Dap UI setup
+        dapui.setup({
+            icons = { expanded = "▾", collapsed = "▸", current_frame = "*" },
+            controls = {
+                icons = {
+                    pause = "⏸",
+                    play = "▶",
+                    step_into = "⏎",
+                    step_over = "⏭",
+                    step_out = "⏮",
+                    step_back = "b",
+                    run_last = "▶▶",
+                    terminate = "⏹",
+                    disconnect = "⏏",
+                },
+            },
+        })
+
+        -- Automatically open/close DAP UI
+        dap.listeners.after.event_initialized["dapui_config"] = dapui.open
+        dap.listeners.before.event_terminated["dapui_config"] = dapui.close
+        dap.listeners.before.event_exited["dapui_config"] = dapui.close
+
+        -- Setup virtual text to show variable values inline
+        require("nvim-dap-virtual-text").setup()
+
+        -- Setup Rust & React DAPs here
+        dap.adapters.codelldb = {
+            type = "server",
+            port = "${port}",
+            executable = {
+                command = vim.fn.exepath("codelldb"),
+                args = { "--port", "${port}" },
+            },
+        }
+
+        dap.configurations.rust = {
+            {
+                name = "Launch file",
+                type = "codelldb",
+                request = "launch",
+                program = function()
+                    return vim.fn.input("Path to executable: ", vim.fn.getcwd() .. "/target/debug/", "file")
+                end,
+                cwd = "${workspaceFolder}",
+                stopOnEntry = false,
+            },
+        }
+    end,
+}

common/.config/nvim/lua/plugins/code-lsp.lua

@@ -58,12 +58,60 @@ return {
         },
     },
 
+    -- NeoVim
+    { "folke/lazydev.nvim", ft = "lua" },
+
     -- Rust
     {
         "mrcjkb/rustaceanvim",
         version = "^6",
-        config = function()
-            vim.g.rusteceanvim = {
+        lazy = false,
+        init = function()
+            vim.g.rustaceanvim = {
+                server = {
+                    -- Keymaps in ../../after/ftplugin/rust.lua
+
+                    -- LSP configuration
+                    default_settings = {
+                        ["rust-analyzer"] = {
+                            cargo = { allFeatures = true },
+                            diagnostics = {
+                                enable = true,
+                                enableExperimental = true,
+                            },
+                            completion = {
+                                addCallArgumentSnippets = true,
+                                addCallParenthesis = true,
+                                postfix = { enable = true },
+                                autoimport = { enable = true },
+                            },
+                        },
+                        inlayHints = {
+                            bindingModeHints = { enable = false },
+                            chainingHints = { enable = true },
+                            closingBraceHints = { enable = true, minLines = 25 },
+                            closureReturnTypeHints = { enable = "never" },
+                            lifetimeElisionHints = { enable = "never", useParameterNames = false },
+                            maxLength = 25,
+                            parameterHints = { enable = true },
+                            reborrowHints = { enable = "never" },
+                            renderColons = true,
+                            typeHints = {
+                                enable = true,
+                                hideClosureInitialization = false,
+                                hideNamedConstructor = false,
+                            },
+                        },
+                        procMacro = {
+                            enable = true,
+                            ignored = {
+                                ["async-trait"] = { "async_trait" },
+                                ["napi-derive"] = { "napi" },
+                                ["async-recursion"] = { "async_recursion" },
+                            },
+                        },
+                    },
+                },
                 dap = {
                     adapter = {
                         type = "executable",

common/.config/nvim/lua/plugins/code-testing.lua

@@ -5,14 +5,17 @@ return {
         "nvim-neotest/neotest",
         cond = require("config.util").is_not_vscode(),
         dependencies = {
+            "nvim-neotest/nvim-nio",
             "nvim-lua/plenary.nvim",
             "antoinemadec/FixCursorHold.nvim",
             "nvim-treesitter/nvim-treesitter",
-            "marilari88/neotest-vitest",
+
+            "marilari88/neotest-vitest", -- JS/TS/React/Vue
+            "rcasia/neotest-bash", -- bash
         },
         opts = {
             -- Do NOT add adapters here
-            -- Add it to opts.adapters inside config function
+            -- Add it to opts.adapters inside config function below
             adapters = {},
             status = { virtual_text = true },
             output = { open_on_run = true },
@@ -38,7 +41,6 @@ return {
                 },
             }, neotest_ns)
 
-            -- WARN: Change the following code if we change lazy.nvim
             if require("lazy.core.config").spec.plugins["trouble.nvim"] ~= nil then
                 opts.consumers = opts.consumers or {}
                 -- Refresh and auto close trouble after running tests
@@ -72,6 +74,7 @@ return {
 
             -- TIP: Add adapters here
             table.insert(opts.adapters, require("neotest-vitest"))
+            table.insert(opts.adapters, require("rustaceanvim.neotest"))
 
             if opts.adapters then
                 local adapters = {}
@@ -107,14 +110,15 @@ return {
             --  r: Run the selected test
             --  a: Attaches to the test result (output)
             --  i: Jumps to the code of the test
-            { "<leader>tt", function() require("neotest").run.run(vim.fn.expand("%")) end,                      desc = "Test: Run File" },
+            { "<leader>tt", function() require("neotest").run.run(vim.fn.expand("%")) end,                      desc = "Test: Run All Test in Current File" },
             { "<leader>tT", function() require("neotest").run.run(vim.loop.cwd()) end,                          desc = "Test: Run All Test Files" },
-            { "<leader>tr", function() require("neotest").run.run() end,                                        desc = "Test: Run Nearest" },
-            { "<leader>tl", function() require("neotest").run.run_last() end,                                   desc = "Test: Run Last" },
-            { "<leader>ts", function() require("neotest").summary.toggle() end,                                 desc = "Test: Toggle Summary" },
+            { "<leader>tn", function() require("neotest").run.run() end,                                        desc = "Test: Run Nearest" },
+            { "<leader>tR", function() require("neotest").run.run_last() end,                                   desc = "Test: Re-Run Last" },
+            { "<leader>ts", function() require("neotest").run.stop() end,                                       desc = "Test: Stop" },
+
             { "<leader>to", function() require("neotest").output.open({ enter = true, auto_close = true }) end, desc = "Test: Show Output" },
             { "<leader>tO", function() require("neotest").output_panel.toggle() end,                            desc = "Test: Toggle Output Panel" },
-            { "<leader>tS", function() require("neotest").run.stop() end,                                       desc = "Test: Stop" },
+            { "<leader>tS", function() require("neotest").summary.toggle() end,                                 desc = "Test: Toggle Summary Panel" },
         },
     },
 }

common/.config/nvim/lua/plugins/completion.lua

@@ -111,6 +111,7 @@ return {
 
             sources = {
                 default = {
+                    "lazydev",
                     "lsp",
                     "buffer",
                     "path",
@@ -143,6 +144,11 @@ return {
                             return vim.tbl_contains({ "gitcommit", "markdown" }, vim.o.filetype)
                         end,
                     },
+                    lazydev = {
+                        name = "LazyDev",
+                        module = "lazydev.integrations.blink",
+                        score_offset = 1001,
+                    },
                     lsp = {
                         score_offset = 1000,
                     },

common/.config/nvim/lua/plugins/utility-plugs.lua

@@ -225,6 +225,7 @@ return {
                 { "<leader>h", group = "Help", icon = { icon = "󰞋", color = "orange" } },
                 { "<leader>n", group = "Neovim Things", icon = { icon = "", color = "orange" } },
                 { "<leader>q", group = "Database", icon = { icon = "", color = "orange" } },
+                { "<leader>r", group = "Rust", icon = { icon = "󱘗", color = "orange" } },
                 { "<leader>s", group = "Search/Grep", icon = { icon = "", color = "orange" } },
                 { "<leader>t", group = "Unit Test" },
                 { "<leader>x", group = "Delete/Disable/Remove", icon = { icon = "", color = "orange" } },