Add gears.filesystem.make_parent_dir(path)

Given a path, this function tries to recursively create parent
directories.

Signed-off-by: Uli Schlachter <psychon@znc.in>

lib/gears/filesystem.lua

@@ -11,22 +11,32 @@ local gtable = require("gears.table")
 
 local filesystem = {}
 
---- Create a directory
--- @tparam string dir The directory.
--- @return (true, nil) on success, (false, err) on failure
-function filesystem.mkdir(dir)
-    local gfile = Gio.File.new_for_path(dir)
+local function make_directory(gfile)
     local success, err = gfile:make_directory_with_parents()
     if success then
         return true
     end
     if err.domain == Gio.IOErrorEnum and err.code == "EXISTS" then
-        -- Direcotry already exists, let this count as success
+        -- Directory already exists, let this count as success
         return true
     end
     return false, err
 end
 
+--- Create a directory
+-- @tparam string dir The directory.
+-- @return (true, nil) on success, (false, err) on failure
+function filesystem.mkdir(dir)
+    return make_directory(Gio.File.new_for_path(dir))
+end
+
+--- Create all parent directories for a given file.
+-- @tparam string path The path whose parents should be created.
+-- @return (true, nil) on success, (false, err) on failure
+function filesystem.make_parent_directories(file)
+    return make_directory(Gio.File.new_for_path(file):get_parent())
+end
+
 --- Check if a file exists, is readable and not a directory.
 -- @tparam string filename The file path.
 -- @treturn boolean True if file exists and is readable.