Org-Mode Archiving: Create containing headings

Question

I've started using org-mode and am now at the point where I really need archiving. However, I often have sub-projects which are hard to understand without the containing project (i.e., the ancestors in the tree).

Is it possible to archive a subtree while creating the super-tree (if it does not exist yet)?

Concrete example. Say my gtd.org file looks like this:

* Private
** TODO Organize all my Todos
[…] 

* Work
[…]
** TODO Awesome Project
*** DONE Organize all my Todos
**** DONE Do X
**** DONE Do Y
*** TODO Get Work Done

And my gtd.org_archive file is empty. Now, when I archive the "DONE Organize all my Todos" task, this is what I want my archive file to look like:

* Work
** Awesome Project
*** DONE Organize all my Todos
**** DONE Do X
**** DONE Do Y

Obviously, when later archiving other stuff, it should figure out whether the containing tree must be created or is already there. E.g., if I later set the "Get Work Done" to DONE and archive it, this is how the archive should look like:

* Work
** Awesome Project
*** DONE Organize all my Todos
**** DONE Do X
**** DONE Do Y
*** DONE Get Work Done

It should not create a new * Work / ** Awesome Project tree. However, when I later archive the "Organize all my Todos" under "Private", it should not be mixed up with the one under work, but look like this:

* Private
** DONE Organize all my Todos

* Work
** Awesome Project
*** DONE Organize all my Todos
**** DONE Do X
**** DONE Do Y
*** DONE Get Work Done

Is there any way of achieving this using org-mode?

Thanks in advance.

Answer 1

In the org mode FAQ is a link to code from edgimar which should be able to preserve the structure.

I'm unsure if I should insert the code here or if it's too long for that. I'll open this answer as wiki in case someone else wants to decide.