52aacc5f0b
The variables swift_developer_mode and swift_venv_download no longer carry any meaning. This review changes swift to do the equivalent of what developer_mode was all the time, meaning that it always builds the venv and never requires the repo server, but it will use a repo server when available. As part of this, we move the source build out of its own file because it's now a single task to include the venv build role. This is just to make it easier to follow the code. Change-Id: I9233e4daff0034339750477fd21d5cfa181afd83