refactor(#2883): multi instance explore

Author: alex-courtis

Diff for: lua/nvim-tree/explorer/init.lua

@@ -30,8 +30,6 @@ local config
 ---@field clipboard Clipboard
 local Explorer = {}
 
-Explorer.explore = require("nvim-tree.explorer.explore").explore
-
 ---@param path string|nil
 ---@return Explorer|nil
 function Explorer:new(path)
@@ -264,17 +262,7 @@ end
 function Explorer:_load(node)
   local cwd = node.link_to or node.absolute_path
   local git_status = git.load_project_status(cwd)
-  Explorer.explore(node, git_status, self)
-end
-
-function Explorer.setup(opts)
-  config = opts
-  require("nvim-tree.explorer.node").setup(opts)
-  require("nvim-tree.explorer.explore").setup(opts)
-  require("nvim-tree.explorer.watch").setup(opts)
-
-  Marks = require "nvim-tree.marks"
-  Clipboard = require "nvim-tree.actions.fs.clipboard"
+  self:explore(node, git_status, self)
 end
 
 ---@private
@@ -337,4 +325,113 @@ function Explorer:update_parent_statuses(node, project, root)
   end
 end
 
+---@private
+---@param handle uv.uv_fs_t
+---@param cwd string
+---@param node Node
+---@param git_status table
+---@param parent Explorer
+function Explorer:populate_children(handle, cwd, node, git_status, parent)
+  local node_ignored = explorer_node.is_git_ignored(node)
+  local nodes_by_path = utils.bool_record(node.nodes, "absolute_path")
+
+  local filter_status = parent.filters:prepare(git_status)
+
+  node.hidden_stats = vim.tbl_deep_extend("force", node.hidden_stats or {}, {
+    git = 0,
+    buf = 0,
+    dotfile = 0,
+    custom = 0,
+    bookmark = 0,
+  })
+
+  while true do
+    local name, t = vim.loop.fs_scandir_next(handle)
+    if not name then
+      break
+    end
+
+    local abs = utils.path_join { cwd, name }
+
+    if Watcher.is_fs_event_capable(abs) then
+      local profile = log.profile_start("populate_children %s", abs)
+
+      ---@type uv.fs_stat.result|nil
+      local stat = vim.loop.fs_stat(abs)
+      local filter_reason = parent.filters:should_filter_as_reason(abs, stat, filter_status)
+      if filter_reason == FILTER_REASON.none and not nodes_by_path[abs] then
+        local child = nil
+        if t == "directory" and vim.loop.fs_access(abs, "R") then
+          child = builders.folder(node, abs, name, stat)
+        elseif t == "file" then
+          child = builders.file(node, abs, name, stat)
+        elseif t == "link" then
+          local link = builders.link(node, abs, name, stat)
+          if link.link_to ~= nil then
+            child = link
+          end
+        end
+        if child then
+          table.insert(node.nodes, child)
+          nodes_by_path[child.absolute_path] = true
+          explorer_node.update_git_status(child, node_ignored, git_status)
+        end
+      else
+        for reason, value in pairs(FILTER_REASON) do
+          if filter_reason == value then
+            node.hidden_stats[reason] = node.hidden_stats[reason] + 1
+          end
+        end
+      end
+
+      log.profile_end(profile)
+    end
+  end
+end
+
+---@private
+---@param node Node
+---@param status table
+---@param parent Explorer
+---@return Node[]|nil
+function Explorer:explore(node, status, parent)
+  local cwd = node.link_to or node.absolute_path
+  local handle = vim.loop.fs_scandir(cwd)
+  if not handle then
+    return
+  end
+
+  local profile = log.profile_start("explore %s", node.absolute_path)
+
+  self:populate_children(handle, cwd, node, status, parent)
+
+  local is_root = not node.parent
+  local child_folder_only = explorer_node.has_one_child_folder(node) and node.nodes[1]
+  if config.renderer.group_empty and not is_root and child_folder_only then
+    local child_cwd = child_folder_only.link_to or child_folder_only.absolute_path
+    local child_status = git.load_project_status(child_cwd)
+    node.group_next = child_folder_only
+    local ns = self:explore(child_folder_only, child_status, parent)
+    node.nodes = ns or {}
+
+    log.profile_end(profile)
+    return ns
+  end
+
+  parent.sorters:sort(node.nodes)
+  parent.live_filter:apply_filter(node)
+
+  log.profile_end(profile)
+  return node.nodes
+end
+
+function Explorer.setup(opts)
+  config = opts
+  require("nvim-tree.explorer.node").setup(opts)
+  require("nvim-tree.explorer.watch").setup(opts)
+
+  Marks = require "nvim-tree.marks"
+  Clipboard = require "nvim-tree.actions.fs.clipboard"
+end
+
 return Explorer