From d03807afbac119125b81f92349e4d7c78e8e79fa Mon Sep 17 00:00:00 2001
From: Jonathan Apodaca <jrapodaca@gmail.com>
Date: Sun, 13 Apr 2025 22:38:30 -0600
Subject: [PATCH] (examples/filetree.lua) integrate file-watcher

---
 examples/filetree.lua | 50 +++++++++++++++++++++++++++----------------
 1 file changed, 31 insertions(+), 19 deletions(-)

diff --git a/examples/filetree.lua b/examples/filetree.lua
index 5249c41..1079e6b 100644
--- a/examples/filetree.lua
+++ b/examples/filetree.lua
@@ -44,11 +44,7 @@ end
 
 --- Normalizes the given path to an absolute path.
 --- @param path string
-function H.normalize(path)
-  path = vim.fs.normalize(path)
-  if path:sub(1, 1) ~= '/' then path = vim.fs.joinpath(vim.uv.cwd(), path) end
-  return vim.fs.normalize(path)
-end
+function H.normalize(path) return vim.fs.abspath(vim.fs.normalize(path)) end
 
 --- Computes the relative path from `base` to `path`.
 --- @param path string
@@ -155,19 +151,35 @@ local function _render_in_buffer(opts)
     end)
   end)
 
-  -- --
-  -- -- TODO: :help watch-file
-  -- --
-  -- local watcher = vim.uv.new_fs_event()
-  -- if watcher ~= nil then
-  --   watcher:start(root_path, { recursive = true }, function(err, fname, status)
-  --     -- TODO: more efficient update:
-  --     s_tree_inf:set(H.get_tree(root_path))
   --
-  --     -- TODO: proper disposal
-  --     watcher:stop()
-  --   end)
-  -- end
+  -- :help watch-file
+  --
+  local watcher = vim.uv.new_fs_event()
+  if watcher ~= nil then
+    --- @diagnostic disable-next-line: unused-local
+    watcher:start(opts.root_path, { recursive = true }, function(_err, fname, _status)
+      fname = H.normalize(fname)
+
+      local dir_path = vim.fs.dirname(fname)
+      local dir = s_tree_inf:get().path_to_node[dir_path]
+      if not dir then return end
+
+      s_tree_inf:schedule_update(function(tree_inf)
+        H.populate_dir_children(dir, tree_inf.path_to_node)
+        return tree_inf
+      end)
+    end)
+  end
+  vim.api.nvim_create_autocmd('WinClosed', {
+    once = true,
+    pattern = tostring(winnr),
+    callback = function()
+      if watcher == nil then return end
+
+      watcher:stop()
+      watcher = nil
+    end,
+  })
 
   local controller = {}
 
@@ -411,8 +423,8 @@ function M.show(opts)
     callback = M.hide,
   })
 
-  vim.wo.number = false
-  vim.wo.relativenumber = false
+  vim.wo[0][0].number = false
+  vim.wo[0][0].relativenumber = false
 
   local bufnr = vim.api.nvim_get_current_buf()