Swith to rustaceanvim and set up Rust debugging

dotfiles/.config/nvim/lua/lsp.lua

@@ -19,7 +19,6 @@ local common_on_attach = function(client, bufnr)
             end,
         })
     end
-
     -- Use vim's default coloring.
     client.server_capabilities.semanticTokensProvider = nil
     for _, group in ipairs(vim.fn.getcompletion("@lsp", "highlight")) do
@@ -27,13 +26,61 @@ local common_on_attach = function(client, bufnr)
     end
 end
 
+-- LSP diagnostics.
+vim.lsp.handlers["textDocument/publishDiagnostics"] =
+    vim.lsp.with(vim.lsp.diagnostic.on_publish_diagnostics, {
+        virtual_text = false,
+        underline = true,
+        signs = true,
+        update_in_insert = false
+    })
+
+-- Setup rust outside of lspconfig.
+vim.g.rustaceanvim = function()
+    return {
+        -- Plugin configuration.
+        tools = {
+        },
+        -- LSP configuration.
+        server = {
+            on_attach = function(client, bufnr)
+                common_on_attach(client, bufnr)
+            end,
+            default_settings = {
+                -- rust-analyzer language server configuration
+                ['rust-analyzer'] = {
+                    imports = {
+                        granularity = {
+                            group = "module",
+                        },
+                        prefix = "self",
+                    },
+                    cargo = {
+                        buildScripts = {
+                            enable = true,
+                        },
+                    },
+                    procMacro = {
+                        enable = true
+                    },
+                    checkOnSave = {
+                        command = "clippy",
+                    },
+                },
+            },
+            -- DAP configuration.
+            dap = {
+            },
+        }
+    }
+end
+
 local nvim_lsp = require('lspconfig')
 local capabilities = vim.lsp.protocol.make_client_capabilities()
 
 -- LSPs
 local servers = {
     "clangd",
-    "gleam",
     "lua_ls",
     "ocamllsp",
     "pyright",
@@ -45,32 +92,6 @@ for _, lsp in ipairs(servers) do
     nvim_lsp[lsp].setup { capabilities = capabilities, on_attach = common_on_attach }
 end
 
-nvim_lsp.rust_analyzer.setup({
-    on_attach = common_on_attach,
-    capabilities = capabilities,
-    settings = {
-        ["rust-analyzer"] = {
-            imports = {
-                granularity = {
-                    group = "module",
-                },
-                prefix = "self",
-            },
-            cargo = {
-                buildScripts = {
-                    enable = true,
-                },
-            },
-            procMacro = {
-                enable = true
-            },
-            checkOnSave = {
-                command = "clippy",
-            },
-        }
-    }
-})
-
 nvim_lsp.ruff.setup({
     on_attach = function (client)
         common_on_attach(client)
@@ -84,12 +105,3 @@ nvim_lsp.ruff.setup({
         }
     },
 })
-
--- LSP diagnostics.
-vim.lsp.handlers["textDocument/publishDiagnostics"] =
-    vim.lsp.with(vim.lsp.diagnostic.on_publish_diagnostics, {
-        virtual_text = false,
-        underline = true,
-        signs = true,
-        update_in_insert = false
-    })

dotfiles/.config/nvim/lua/plugins/dap.lua

@@ -0,0 +1,87 @@
+local dap, dapui = require('dap'), require('dapui')
+
+-- Open dapui once dap starts.
+dapui.setup()
+dap.listeners.before.attach.dapui_config = function()
+  dapui.open()
+end
+dap.listeners.before.launch.dapui_config = function()
+  dapui.open()
+end
+dap.listeners.before.event_terminated.dapui_config = function()
+  dapui.close()
+end
+dap.listeners.before.event_exited.dapui_config = function()
+  dapui.close()
+end
+
+-- Keybindings used in probably all editors/IDEs.
+vim.keymap.set('n', '<F5>', dap.continue)
+vim.keymap.set('n', '<F10>', dap.step_over)
+vim.keymap.set('n', '<F11>', dap.step_into)
+vim.keymap.set('n', '<F12>', dap.step_out)
+-- Breakpoints.
+vim.keymap.set('n', '<Leader>b', dap.toggle_breakpoint)
+vim.keymap.set('n', '<Leader>B', dap.set_breakpoint)
+vim.keymap.set('n', '<Leader>lp', function() dap.set_breakpoint(nil, nil, vim.fn.input('Log point message: ')) end)
+-- Repl, run and dap-ui bindings.
+vim.keymap.set('n', '<Leader>dr', dap.repl.open)
+vim.keymap.set('n', '<Leader>dl', dap.run_last)
+vim.keymap.set({'n', 'v'}, '<Leader>dh', function() require('dap.ui.widgets').hover() end)
+vim.keymap.set({'n', 'v'}, '<Leader>dp', function() require('dap.ui.widgets').preview() end)
+vim.keymap.set('n', '<Leader>df', function() local widgets = require('dap.ui.widgets') widgets.centered_float(widgets.frames) end)
+vim.keymap.set('n', '<Leader>ds', function() local widgets = require('dap.ui.widgets') widgets.centered_float(widgets.scopes) end)
+
+-- Set up lldb (LLVM debugger)
+-- Install archlinux: sudo pacman -S lldb
+-- Install ubuntu: sudo apt
+dap.adapters.lldb = {
+    type = 'server',
+    port = "${port}",
+    executable = {
+        command = '/usr/bin/lldb-dap',
+        args = { "--port", "${port}" },
+    },
+}
+
+-- Custom debuggable build runs (on top of rust-analyzer debuggables).
+local ExecTypes = {
+  TEST = "cargo build --tests -q --message-format=json",
+  BIN = "cargo build -q --message-format=json"
+}
+local function runBuild(type)
+  local lines = vim.fn.systemlist(type)
+  local output = table.concat(lines, "\n")
+  local filename = output:match('^.*"executable":"(.*)",.*\n.*,"success":true}$')
+
+  if filename == nil then
+    return error("failed to build cargo project")
+  end
+
+  return filename
+end
+-- Custom debuggable configurations.
+dap.configurations.rust = {
+  {
+    name = "Debug Test",
+    type = "lldb",
+    request = "launch",
+    program = function ()
+      return runBuild(ExecTypes.TEST)
+    end,
+    cwd = "${workspaceFolder}",
+    stopOnEntry = false,
+    showDisassembly = "never"
+  },
+  {
+    name = "Debug Bin",
+    type = "lldb",
+    request = "launch",
+    program = function ()
+      return runBuild(ExecTypes.BIN)
+    end,
+    cwd = "${workspaceFolder}",
+    stopOnEntry = false,
+    showDisassembly = "never"
+  }
+}

dotfiles/.config/nvim/lua/plugins/init.lua

@@ -38,14 +38,29 @@ require('packer').startup(function()
     -- LSP and related
     use { 'neovim/nvim-lspconfig' }
     use { 'aznhe21/actions-preview.nvim' }
-    use { 'folke/trouble.nvim' } -- lsp diagnostics
+    use { 'folke/trouble.nvim' } -- diagnostics
 
-    -- Plugins to extend builtin language support
+    -- Plugins to extend builtin lsp
     use { 'cespare/vim-toml' }
     use { 'gleam-lang/gleam.vim' }
-    use { 'rust-lang/rust.vim' }
     use { 'folke/neodev.nvim' }
     use { 'hashivim/vim-terraform' }
+    use {
+        'mrcjkb/rustaceanvim',
+        requires = {
+            'mfussenegger/nvim-dap'
+        }
+    }
+
+    -- Debugging
+    use { 'mfussenegger/nvim-dap' }
+    use {
+        "rcarriga/nvim-dap-ui",
+        requires = {
+            "mfussenegger/nvim-dap",
+            "nvim-neotest/nvim-nio",
+        }
+    }
 
     -- Git
     use {
@@ -70,6 +85,7 @@ end)
 
 require('plugins.catppuccin')
 require('plugins.cmp')
+require('plugins.dap')
 require('plugins.gitsigns')
 require('plugins.luasnip_config')
 require('plugins.neogit')