fix: add compatibility for Lua 5.1 (#456)

Some architectures don't support LuaJIT.
Remove the goto's from the code to be compatible
with Neovim built without LuaJIT.

Signed-off-by: Julian Ruess <julianonline+github@posteo.de>

lua/oil/mutator/parser.lua

@@ -192,7 +192,11 @@ M.parse = function(bufnr)
       seen_names[name] = true
     end
   end
+
   for i, line in ipairs(lines) do
+    -- hack to be compatible with Lua 5.1
+    -- use return instead of goto
+    (function()
       if line:match("^/%d+") then
         -- Parse the line for an existing entry
         local result, err = M.parse_line(adapter, line, column_defs)
@@ -203,10 +207,10 @@ M.parse = function(bufnr)
             end_lnum = i,
             col = 0,
           })
-        goto continue
+          return
         elseif result.data.id == 0 then
           -- Ignore entries with ID 0 (typically the "../" entry)
-        goto continue
+          return
         end
         local parsed_entry = result.data
         local entry = result.entry
@@ -226,7 +230,7 @@ M.parse = function(bufnr)
             end_lnum = i,
             col = 0,
           })
-        goto continue
+          return
         end
         assert(entry)
 
@@ -281,7 +285,7 @@ M.parse = function(bufnr)
             end_lnum = i,
             col = 0,
           })
-        goto continue
+          return
         end
         if name ~= "" then
           local link_pieces = vim.split(name, " -> ", { plain = true })
@@ -300,7 +304,7 @@ M.parse = function(bufnr)
           })
         end
       end
-    ::continue::
+    end)()
   end
 
   for name, child_id in pairs(original_entries) do

lua/oil/view.lua

@@ -626,9 +626,7 @@ local function render_buffer(bufnr, opts)
   end
 
   for _, entry in ipairs(entry_list) do
-    if not M.should_display(entry[FIELD_NAME], bufnr) then
+    if M.should_display(entry[FIELD_NAME], bufnr) then
-      goto continue
-    end
       local cols = M.format_entry_cols(entry, column_defs, col_width, adapter)
       table.insert(line_table, cols)
 
@@ -638,7 +636,7 @@ local function render_buffer(bufnr, opts)
         jump_idx = #line_table
         M.set_last_cursor(bufname, nil)
       end
-    ::continue::
+    end
   end
 
   local lines, highlights = util.render_table(line_table, col_width)