feat: case insensitive sorting (#429)

* check for sorting option in netrw

* documentation

* refactor: remove sort_ prefix

---------

Co-authored-by: Steven Arcangeli <stevearc@stevearc.com>

README.md

@@ -216,6 +216,8 @@ require("oil").setup({
     -- Sort file names in a more intuitive order for humans. Is less performant,
     -- so you may want to set to false if you work with large directories.
     natural_order = true,
+    -- Sort file and directory names case insensitive
+    case_insensitive = false,
     sort = {
       -- sort order can be "asc" or "desc"
       -- see :help oil-columns to see which columns are sortable

doc/oil.txt

@@ -106,6 +106,8 @@ CONFIG                                                                *oil-confi
         -- Sort file names in a more intuitive order for humans. Is less performant,
         -- so you may want to set to false if you work with large directories.
         natural_order = true,
+        -- Sort file and directory names case insensitive
+        case_insensitive = false,
         sort = {
           -- sort order can be "asc" or "desc"
           -- see :help oil-columns to see which columns are sortable

lua/oil/columns.lua

@@ -300,11 +300,17 @@ M.register("name", {
   end,
 
   get_sort_value = function(entry)
+    local sort_value = entry[FIELD_NAME]
+
     if config.view_options.natural_order then
-      return entry[FIELD_NAME]:gsub("%d+", pad_number)
-    else
-      return entry[FIELD_NAME]
+      sort_value = sort_value:gsub("%d+", pad_number)
     end
+
+    if config.view_options.case_insensitive then
+      sort_value = sort_value:lower()
+    end
+
+    return sort_value
   end,
 })
 

lua/oil/config.lua

@@ -91,6 +91,8 @@ local default_config = {
     -- Sort file names in a more intuitive order for humans. Is less performant,
     -- so you may want to set to false if you work with large directories.
     natural_order = true,
+    -- Sort file and directory names case insensitive
+    case_insensitive = false,
     sort = {
       -- sort order can be "asc" or "desc"
       -- see :help oil-columns to see which columns are sortable