WIP: properly escape paths in Windows

Still not working with $ (try a file named a$PATH.txt).
:edit a$PATH.txt will expand the variable
:edit a\$PATH.txt will treat it as a path separator, so a/$PATH.txt

lua/oil/init.lua

@@ -423,6 +423,7 @@ end
 M.select = function(opts, callback)
   local cache = require("oil.cache")
   local config = require("oil.config")
+  local fs = require("oil.fs")
   opts = vim.tbl_extend("keep", opts or {}, {})
   local function finish(err)
     if err then
@@ -527,12 +528,12 @@ M.select = function(opts, callback)
     local child = dir .. entry.name
     local url = scheme .. child
     local is_directory = entry.type == "directory"
-      or (
-        entry.type == "link"
-        and entry.meta
-        and entry.meta.link_stat
-        and entry.meta.link_stat.type == "directory"
-      )
+        or (
+          entry.type == "link"
+          and entry.meta
+          and entry.meta.link_stat
+          and entry.meta.link_stat.type == "directory"
+        )
     if is_directory then
       url = url .. "/"
       -- If this is a new directory BUT we think we already have an entry with this name, disallow
@@ -558,9 +559,11 @@ M.select = function(opts, callback)
       end
     end
 
+    print("url", url, "entry", entry.name)
     -- Normalize the url before opening to prevent needing to rename them inside the BufReadCmd
     -- Renaming buffers during opening can lead to missed autocmds
     get_edit_path(function(normalized_url)
+      print("Normalized url", normalized_url)
       local mods = {
         vertical = opts.vertical,
         horizontal = opts.horizontal,
@@ -569,11 +572,14 @@ M.select = function(opts, callback)
         emsg_silent = true,
       }
       -- If we're editing a file on disk, shorten the path prior to :edit so the
-      -- display name will show up shortened
-      if adapter.name == "files" and not util.parse_url(normalized_url) then
+      -- display name will show up shortened.
+      -- Don't do this on Windows, where ~/home/path.txt doesn't work
+      if adapter.name == "files" and not util.parse_url(normalized_url) and not fs.is_windows then
         normalized_url = require("oil.fs").shorten_path(normalized_url)
+        print("Shortened", normalized_url)
       end
       local filename = util.escape_filename(normalized_url)
+      print("Escaped", filename)
 
       -- If we're previewing a file that hasn't been opened yet, make sure it gets deleted after we
       -- close the window
@@ -617,9 +623,9 @@ M.select = function(opts, callback)
       return finish(err)
     end
     if
-      opts.close
-      and vim.api.nvim_win_is_valid(prev_win)
-      and prev_win ~= vim.api.nvim_get_current_win()
+        opts.close
+        and vim.api.nvim_win_is_valid(prev_win)
+        and prev_win ~= vim.api.nvim_get_current_win()
     then
       vim.api.nvim_win_call(prev_win, function()
         M.close()
@@ -752,7 +758,7 @@ local function restore_alt_buf()
         -- If we are editing the same buffer that we started oil from, set the alternate to be
         -- what it was before we opened oil
         local has_orig_alt, alt_buffer =
-          pcall(vim.api.nvim_win_get_var, 0, "oil_original_alternate")
+            pcall(vim.api.nvim_win_get_var, 0, "oil_original_alternate")
         if has_orig_alt and vim.api.nvim_buf_is_valid(alt_buffer) then
           vim.fn.setreg("#", alt_buffer)
         end

lua/oil/util.lua

@@ -1,5 +1,6 @@
 local config = require("oil.config")
 local constants = require("oil.constants")
+local fs = require("oil.fs")
 
 local M = {}
 
@@ -19,8 +20,11 @@ end
 ---@param filename string
 ---@return string
 M.escape_filename = function(filename)
-  local ret = filename:gsub("([%%#$])", "\\%1")
-  return ret
+  if fs.is_windows then
+    filename = filename:gsub("\\", "/")
+    filename = filename:gsub("([$])", "\\%1")
+  end
+  return vim.fn.fnameescape(filename)
 end
 
 local _url_escape_chars = {
@@ -408,7 +412,7 @@ M.add_title_to_win = function(winid, opts)
         end
         local new_title = get_title()
         local new_width =
-          math.min(vim.api.nvim_win_get_width(winid) - 4, 2 + vim.api.nvim_strwidth(new_title))
+            math.min(vim.api.nvim_win_get_width(winid) - 4, 2 + vim.api.nvim_strwidth(new_title))
         vim.api.nvim_buf_set_lines(bufnr, 0, -1, true, { " " .. new_title .. " " })
         vim.bo[bufnr].modified = false
         vim.api.nvim_win_set_width(title_winid, new_width)
@@ -462,13 +466,13 @@ M.get_adapter_for_action = function(action)
     local dest_adapter = assert(config.get_adapter_by_scheme(action.dest_url))
     if adapter ~= dest_adapter then
       if
-        adapter.supported_adapters_for_copy
-        and adapter.supported_adapters_for_copy[dest_adapter.name]
+          adapter.supported_adapters_for_copy
+          and adapter.supported_adapters_for_copy[dest_adapter.name]
       then
         return adapter
       elseif
-        dest_adapter.supported_adapters_for_copy
-        and dest_adapter.supported_adapters_for_copy[adapter.name]
+          dest_adapter.supported_adapters_for_copy
+          and dest_adapter.supported_adapters_for_copy[adapter.name]
       then
         return dest_adapter
       else
@@ -648,9 +652,9 @@ end
 ---@return nil|integer
 M.buf_get_win = function(bufnr, preferred_win)
   if
-    preferred_win
-    and vim.api.nvim_win_is_valid(preferred_win)
-    and vim.api.nvim_win_get_buf(preferred_win) == bufnr
+      preferred_win
+      and vim.api.nvim_win_is_valid(preferred_win)
+      and vim.api.nvim_win_get_buf(preferred_win) == bufnr
   then
     return preferred_win
   end