packaging: move Inno Setup core logic into a module...
packaging: move Inno Setup core logic into a module
Aspects of building the Inno Setup and WIX installers are shared.
It will make sense for them to share code.
Plus, having code in a reusable library (as opposed to a standalone
script) is just a better approach.
This commit moves the core logic to build the Inno Setup installer
into the hgpackaging package. inno/build.py is now a simple frontend
script that calls into a module to do the bulk of the work.
As part of this change, I also found a typo in build() where it was
referencing "iscc" instead of "iscc_exe." Because "iscc" was in
the global scope via the only caller, things just happened to work
before. Another benefit of always using functions and not putting
global code for __main__ in the same file as library code.
Differential Revision:
https://phab.mercurial-scm.org/D6087
