It is reported that the built-in lua function os.remove(path) does
not removes empty directories on windows. To fix this a system.rmdir
function is introduced that calls a native win32 function.
Also common.rm(path, recursively) was added which wraps system.rmdir()
to easily delete an entire folder with all its contents.
Move the function mkdirp into common to be generally available.
Use the new common.mkdirp from create_user_directory() from
core/init.lua replacing previous parent directory creation code
within the function.
The previous mkdirp function did not work on Windows where
absolute paths starts with a drive letter. The code from
create_user_directory() did not have this problem but was wrong
in the way it was creating the nested directories.
The new implementation in common.mkdirp fix both problems.
If a non-existing file is specified with the command "core:open-file"
a new document is opened with the given filename provided the directory
already exists.
The flag new_file is set to true in the Doc instance.
The file will be actually created only when the "save" command is used.
The document will be marked with the "*" event when no changes are done
to mean that it is a new file and is not yet saved.
The function common.normalize_path now process the .. and . in the
filename. Before was not needed because system.absolute_path already
get rid of them but now we need to have the absolute path of files
that not yet exists so we cannot use system.absolute_path.
Use the function defined in the "common" module.
Move the check for not-nil filename from common.normalize_path
to core.open_doc. In this latter the filename can be nil if a
new unnamed document is created.