1 files changed, 88 insertions, 0 deletions

diff --git a/neovim/.config/nvim/lua/config/dap_node.lua b/neovim/.config/nvim/lua/config/dap_node.lua
new file mode 100644
index 0000000..0fb6890
--- /dev/null
+++ b/neovim/.config/nvim/lua/config/dap_node.lua
@@ -0,0 +1,88 @@
+-- JavaScript/TypeScript launch configs, wired to the js-debug-adapter
+-- (Microsoft's vscode-js-debug, bundled by Mason as a standalone
+-- multi-session DAP server) that dap.lua's mason-nvim-dap ensure_installed
+-- installs.
+--
+-- There's no nvim-dap-python equivalent for this: the one community plugin
+-- for it (mxsdev/nvim-dap-vscode-js) hardcodes the older
+-- `out/src/vsDebugServer.js` vscode-js-debug build layout, which doesn't
+-- match what Mason's js-debug-adapter package actually installs
+-- (`js-debug/src/dapDebugServer.js`) - so this resolves the Mason path
+-- directly instead, same approach as dap-python.lua's debugpy_path.
+--
+-- Lives under lua/config/ rather than lua/plugins/ (and is required
+-- eagerly from dap.lua's config()) because it isn't an installable plugin
+-- itself, just adapter/config wiring - same reason project_run.lua lives
+-- here instead of there.
+--
+-- js-debug-adapter is a multi-session server: debugging a script that
+-- spawns a worker thread arrives as a `startDebugging` reverse request
+-- rather than a second top-level session. nvim-dap's core (dap/session.lua)
+-- already handles that natively, so no extra plugin is needed for it either.
+local M = {}
+
+local function configurations()
+  return {
+    {
+      type = "pwa-node",
+      request = "launch",
+      name = "Launch file",
+      program = "${file}",
+      cwd = "${workspaceFolder}",
+    },
+    {
+      type = "pwa-node",
+      request = "attach",
+      name = "Attach to process",
+      processId = require("dap.utils").pick_process,
+      cwd = "${workspaceFolder}",
+    },
+  }
+end
+
+function M.setup()
+  local registry = require("mason-registry")
+  local pkg = registry.get_package("js-debug-adapter")
+
+  local function register()
+    local entrypoint = pkg:get_install_path() .. "/js-debug/src/dapDebugServer.js"
+
+    require("dap").adapters["pwa-node"] = {
+      type = "server",
+      host = "localhost",
+      port = "${port}",
+      executable = {
+        command = "node",
+        args = { entrypoint, "${port}" },
+      },
+    }
+
+    local dap = require("dap")
+    for _, filetype in ipairs({ "javascript", "typescript", "javascriptreact", "typescriptreact" }) do
+      dap.configurations[filetype] = configurations()
+    end
+  end
+
+  if pkg:is_installed() then
+    register()
+  else
+    -- Same reasoning as dap-python.lua: dap.lua's mason-nvim-dap
+    -- ensure_installed triggers the install, but that's async - on a fresh
+    -- machine (or before it finishes) the entrypoint doesn't exist on disk
+    -- yet, so wire up the adapter once the install actually completes
+    -- instead of pointing it at a path that isn't there yet.
+    vim.notify(
+      "js-debug-adapter not installed yet - dap.lua's ensure_installed should be"
+        .. " installing it now (check :Mason); run :MasonInstall js-debug-adapter"
+        .. " if it doesn't show up there. Debugging will work once it's done.",
+      vim.log.levels.WARN
+    )
+    registry:on("package:install:success", function(installed_pkg)
+      if installed_pkg.name == "js-debug-adapter" then
+        register()
+      end
+    end)
+  end
+end
+
+return M