refacto: move filters and sorters in their own modules

Also exclude filters is taken into account in git ignore
fixes #892

lua/nvim-tree/actions/toggles.lua

@@ -1,17 +1,17 @@
 local view = require"nvim-tree.view"
-local eutils = require"nvim-tree.explorer.utils"
+local filters = require"nvim-tree.explorer.filters"
 local renderer = require"nvim-tree.renderer"
 local reloaders = require"nvim-tree.actions.reloaders"
 
 local M = {}
 
 function M.ignored()
-  eutils.config.filter_ignored = not eutils.config.filter_ignored
+  filters.config.filter_ignored = not filters.config.filter_ignored
   return reloaders.reload_explorer()
 end
 
 function M.dotfiles()
-  eutils.config.filter_dotfiles = not eutils.config.filter_dotfiles
+  filters.config.filter_dotfiles = not filters.config.filter_dotfiles
   return reloaders.reload_explorer()
 end
 

lua/nvim-tree/explorer/common.lua

@@ -0,0 +1,11 @@
+local uv = vim.loop
+
+local M = {}
+
+function M.has_one_child_folder(node)
+  return #node.nodes == 1
+    and node.nodes[1].nodes
+    and uv.fs_access(node.nodes[1].absolute_path, 'R')
+end
+
+return M

lua/nvim-tree/explorer/explore.lua

@@ -2,8 +2,10 @@ local api = vim.api
 local uv = vim.loop
 
 local utils = require'nvim-tree.utils'
-local eutils = require'nvim-tree.explorer.utils'
 local builders = require'nvim-tree.explorer.node-builders'
+local common = require'nvim-tree.explorer.common'
+local sorters = require"nvim-tree.explorer.sorters"
+local filters = require"nvim-tree.explorer.filters"
 
 local M = {}
 
@@ -19,7 +21,7 @@ local function populate_children(handle, cwd, node, status)
 
     local abs = utils.path_join({cwd, name})
     t = get_type_from(t, abs)
-    if not eutils.should_ignore(abs) and not eutils.should_ignore_git(abs, status.files) then
+    if not filters.should_ignore(abs) and not filters.should_ignore_git(abs, status.files) then
       if t == 'directory' and uv.fs_access(abs, 'R') then
         table.insert(node.nodes, builders.folder(abs, name, status, node_ignored))
       elseif t == 'file' then
@@ -51,7 +53,7 @@ function M.explore(node, status)
   populate_children(handle, cwd, node, status)
 
   local is_root = node.cwd ~= nil
-  local child_folder_only = eutils.has_one_child_folder(node) and node.nodes[1]
+  local child_folder_only = common.has_one_child_folder(node) and node.nodes[1]
   if vim.g.nvim_tree_group_empty == 1 and not is_root and child_folder_only then
     node.group_next = child_folder_only
     local ns = M.explore(child_folder_only, status)
@@ -59,7 +61,7 @@ function M.explore(node, status)
     return ns
   end
 
-  utils.merge_sort(node.nodes, eutils.node_comparator)
+  sorters.merge_sort(node.nodes, sorters.node_comparator)
   return node.nodes
 end
 

lua/nvim-tree/explorer/filters.lua

@@ -1,48 +1,17 @@
-local uv = vim.loop
-
 local utils = require'nvim-tree.utils'
 
 local M = {
   ignore_list = {},
   exclude_list = {},
-  node_comparator = nil,
 }
 
-function M.node_comparator_name(a, b)
-  if not (a and b) then
-    return true
+local function is_excluded(path)
+  for _, node in ipairs(M.exclude_list) do
+    if path:match(node) then
+      return true
+    end
   end
-  if a.nodes and not b.nodes then
-    return true
-  elseif not a.nodes and b.nodes then
-    return false
-  end
-
-  return a.name:lower() <= b.name:lower()
-end
-
-function M.node_comparator_modification_time(a, b)
-  if not (a and b) then
-    return true
-  end
-  if a.nodes and not b.nodes then
-    return true
-  elseif not a.nodes and b.nodes then
-    return false
-  end
-
-  local last_modified_a = 0
-  local last_modified_b = 0
-
-  if a.fs_stat ~= nil then
-    last_modified_a = a.fs_stat.mtime.sec
-  end
-
-  if b.fs_stat ~= nil then
-    last_modified_b = b.fs_stat.mtime.sec
-  end
-
-  return last_modified_a <= last_modified_b
+  return false
 end
 
 ---Check if the given path should be ignored.
@@ -51,10 +20,8 @@ end
 function M.should_ignore(path)
   local basename = utils.path_basename(path)
 
-  for _, node in ipairs(M.exclude_list) do
-    if path:match(node) then
-      return false
-    end
+  if is_excluded(path) then
+    return false
   end
 
   if M.config.filter_dotfiles then
@@ -85,12 +52,7 @@ end
 function M.should_ignore_git(path, status)
   return M.config.filter_ignored
     and (M.config.filter_git_ignored and status and status[path] == '!!')
-end
-
-function M.has_one_child_folder(node)
-  return #node.nodes == 1
-    and node.nodes[1].nodes
-    and uv.fs_access(node.nodes[1].absolute_path, 'R')
+    and not is_excluded(path)
 end
 
 function M.setup(opts)
@@ -98,7 +60,6 @@ function M.setup(opts)
     filter_ignored = true,
     filter_dotfiles = opts.filters.dotfiles,
     filter_git_ignored = opts.git.ignore,
-    sort_by = opts.sort_by,
   }
 
   M.exclude_list = opts.filters.exclude
@@ -109,12 +70,6 @@ function M.setup(opts)
       M.ignore_list[filter_name] = true
     end
   end
-
-  if M.config.sort_by == "modification_time" then
-    M.node_comparator = M.node_comparator_modification_time
-  else
-    M.node_comparator = M.node_comparator_name
-  end
 end
 
 return M

lua/nvim-tree/explorer/init.lua

@@ -31,7 +31,8 @@ function Explorer:expand(node)
 end
 
 function M.setup(opts)
-  require"nvim-tree.explorer.utils".setup(opts)
+  require"nvim-tree.explorer.filters".setup(opts)
+  require"nvim-tree.explorer.sorters".setup(opts)
 end
 
 M.Explorer = Explorer

lua/nvim-tree/explorer/reload.lua

@@ -2,8 +2,10 @@ local api = vim.api
 local uv = vim.loop
 
 local utils = require'nvim-tree.utils'
-local eutils = require'nvim-tree.explorer.utils'
 local builders = require'nvim-tree.explorer.node-builders'
+local common = require'nvim-tree.explorer.common'
+local filters = require'nvim-tree.explorer.filters'
+local sorters = require'nvim-tree.explorer.sorters'
 
 local M = {}
 
@@ -51,7 +53,7 @@ function M.reload(node, status)
 
     local abs = utils.path_join({cwd, name})
     t = t or (uv.fs_stat(abs) or {}).type
-    if not eutils.should_ignore(abs) and not eutils.should_ignore_git(abs, status.files) then
+    if not filters.should_ignore(abs) and not filters.should_ignore_git(abs, status.files) then
       child_names[abs] = true
       if not nodes_by_path[abs] then
         if t == 'directory' and uv.fs_access(abs, 'R') then
@@ -76,7 +78,7 @@ function M.reload(node, status)
     ))
 
   local is_root = node.cwd ~= nil
-  local child_folder_only = eutils.has_one_child_folder(node) and node.nodes[1]
+  local child_folder_only = common.has_one_child_folder(node) and node.nodes[1]
   if vim.g.nvim_tree_group_empty == 1 and not is_root and child_folder_only then
     node.group_next = child_folder_only
     local ns = M.reload(child_folder_only, status)
@@ -84,7 +86,7 @@ function M.reload(node, status)
     return ns
   end
 
-  utils.merge_sort(node.nodes, eutils.node_comparator)
+  sorters.merge_sort(node.nodes, sorters.node_comparator)
   return node.nodes
 end
 

lua/nvim-tree/explorer/sorters.lua

@@ -0,0 +1,122 @@
+local M = {
+  sort_by = nil,
+  node_comparator = nil,
+}
+
+---Create a shallow copy of a portion of a list.
+---@param t table
+---@param first integer First index, inclusive
+---@param last integer Last index, inclusive
+---@return table
+local function tbl_slice(t, first, last)
+  local slice = {}
+  for i = first, last or #t, 1 do
+    table.insert(slice, t[i])
+  end
+
+  return slice
+end
+
+local function merge(t, first, mid, last, comparator)
+  local n1 = mid - first + 1
+  local n2 = last - mid
+  local ls = tbl_slice(t, first, mid)
+  local rs = tbl_slice(t, mid + 1, last)
+  local i = 1
+  local j = 1
+  local k = first
+
+  while (i <= n1 and j <= n2) do
+    if comparator(ls[i], rs[j]) then
+      t[k] = ls[i]
+      i = i + 1
+    else
+      t[k] = rs[j]
+      j = j + 1
+    end
+    k = k + 1
+  end
+
+  while i <= n1 do
+    t[k] = ls[i]
+    i = i + 1
+    k = k + 1
+  end
+
+  while j <= n2 do
+    t[k] = rs[j]
+    j = j + 1
+    k = k + 1
+  end
+end
+
+local function split_merge(t, first, last, comparator)
+  if (last - first) < 1 then return end
+
+  local mid = math.floor((first + last) / 2)
+
+  split_merge(t, first, mid, comparator)
+  split_merge(t, mid + 1, last, comparator)
+  merge(t, first, mid, last, comparator)
+end
+
+---Perform a merge sort on a given list.
+---@param t any[]
+---@param comparator function|nil
+function M.merge_sort(t, comparator)
+  if not comparator then
+    comparator = function (left, right)
+      return left < right
+    end
+  end
+
+  split_merge(t, 1, #t, comparator)
+end
+
+function M.node_comparator_name(a, b)
+  if not (a and b) then
+    return true
+  end
+  if a.nodes and not b.nodes then
+    return true
+  elseif not a.nodes and b.nodes then
+    return false
+  end
+
+  return a.name:lower() <= b.name:lower()
+end
+
+function M.node_comparator_modification_time(a, b)
+  if not (a and b) then
+    return true
+  end
+  if a.nodes and not b.nodes then
+    return true
+  elseif not a.nodes and b.nodes then
+    return false
+  end
+
+  local last_modified_a = 0
+  local last_modified_b = 0
+
+  if a.fs_stat ~= nil then
+    last_modified_a = a.fs_stat.mtime.sec
+  end
+
+  if b.fs_stat ~= nil then
+    last_modified_b = b.fs_stat.mtime.sec
+  end
+
+  return last_modified_a <= last_modified_b
+end
+
+function M.setup(opts)
+  M.sort_by = opts.sort_by
+  if M.sort_by == "modification_time" then
+    M.node_comparator = M.node_comparator_modification_time
+  else
+    M.node_comparator = M.node_comparator_name
+  end
+end
+
+return M

lua/nvim-tree/utils.lua

@@ -113,76 +113,6 @@ function M.find_node(_nodes, _fn)
   return node, i
 end
 
----Create a shallow copy of a portion of a list.
----@param t table
----@param first integer First index, inclusive
----@param last integer Last index, inclusive
----@return table
-function M.tbl_slice(t, first, last)
-  local slice = {}
-  for i = first, last or #t, 1 do
-    table.insert(slice, t[i])
-  end
-
-  return slice
-end
-
-local function merge(t, first, mid, last, comparator)
-  local n1 = mid - first + 1
-  local n2 = last - mid
-  local ls = M.tbl_slice(t, first, mid)
-  local rs = M.tbl_slice(t, mid + 1, last)
-  local i = 1
-  local j = 1
-  local k = first
-
-  while (i <= n1 and j <= n2) do
-    if comparator(ls[i], rs[j]) then
-      t[k] = ls[i]
-      i = i + 1
-    else
-      t[k] = rs[j]
-      j = j + 1
-    end
-    k = k + 1
-  end
-
-  while i <= n1 do
-    t[k] = ls[i]
-    i = i + 1
-    k = k + 1
-  end
-
-  while j <= n2 do
-    t[k] = rs[j]
-    j = j + 1
-    k = k + 1
-  end
-end
-
-local function split_merge(t, first, last, comparator)
-  if (last - first) < 1 then return end
-
-  local mid = math.floor((first + last) / 2)
-
-  split_merge(t, first, mid, comparator)
-  split_merge(t, mid + 1, last, comparator)
-  merge(t, first, mid, last, comparator)
-end
-
----Perform a merge sort on a given list.
----@param t any[]
----@param comparator function|nil
-function M.merge_sort(t, comparator)
-  if not comparator then
-    comparator = function (left, right)
-      return left < right
-    end
-  end
-
-  split_merge(t, 1, #t, comparator)
-end
-
 ---Matching executable files in Windows.
 ---@param ext string
 ---@return boolean