Specific versions of some source packages are prone to disappearance from the 'net (UPS, MySQL). Others can be difficult to download in an automated fashion (eg all sf.net packages). A feature to maintain and use a source archive mirror is needed.
copy/sync contents of the srcdir after a successful install to some web-accessible directory
URL fail-over to produce a cascade of URLs for any given source archive
Specific versions of some source packages are prone to disappearance from the 'net (UPS, MySQL). Others can be difficult to download in an automated fashion (eg all sf.net packages). A feature to maintain and use a source archive mirror is needed.