In a hierarchical build, one of my SConscript files, located in a sub-directory needs to print paths of a few nodes (for use by an external script). However, the paths need to be relative to the main directory, in which SConstruct resides, not to the sub-directory I'm currently in.
The functions I'm normally use to get node paths are str(node) and node.get_path(). Both of them return the path relative to the sub-directory.
How can I get a path relative to the root directory of the project?