G migration mechanism (#1030)

lua/nvim-tree/utils.lua

@@ -225,4 +225,60 @@ function M.canonical_path(path)
   return path
 end
 
+-- Create empty sub-tables if not present
+-- @param tbl to create empty inside of
+-- @param sub dot separated string of sub-tables
+-- @return deepest sub-table
+function M.table_create_missing(tbl, sub)
+  if tbl == nil then
+    return nil
+  end
+
+  local t = tbl
+  for s in string.gmatch(sub, "([^%.]+)%.*") do
+    if t[s] == nil then
+      t[s] = {}
+    end
+    t = t[s]
+  end
+
+  return t
+end
+
+-- Serialise a table as a string
+-- @param val table to serialise
+-- @param name optional
+-- @param skipnewlines optional
+-- @param spaces to indent, for internal use
+function M.table_tostring(val, name, skipnewlines, depth)
+  skipnewlines = skipnewlines or false
+  depth = depth or 0
+
+  local tmp = string.rep(" ", depth)
+
+  if name then
+    tmp = tmp .. name .. " = "
+  end
+
+  if type(val) == "table" then
+    tmp = tmp .. "{" .. (not skipnewlines and "\n" or "")
+
+    for k, v in pairs(val) do
+      tmp =  tmp .. M.table_tostring(v, k, skipnewlines, depth + 1) .. "," .. (not skipnewlines and "\n" or "")
+    end
+
+    tmp = tmp .. string.rep(" ", depth) .. "}"
+  elseif type(val) == "number" then
+    tmp = tmp .. tostring(val)
+  elseif type(val) == "string" then
+    tmp = tmp .. string.format("%q", val)
+  elseif type(val) == "boolean" then
+    tmp = tmp .. tostring(val)
+  else
+    tmp = tmp .. "\"[" .. type(val) .. "]\""
+  end
+
+  return tmp
+end
+
 return M