A common source of unnoticed depwaits or uninstallability are main packages which introduce new build or binary dependencies from universe. These either require fixing, or filing a main inclusion report.
To help with this, I added a new
check-mir script into ubuntu-dev-tools version 0.110, which walks through all build and binary dependencies, checks if they are in main/restricted, also considers alternative dependencies, and create a report with a few hints.
For a main package where everything is alright, it looks like this:
$ check-mir Checking support status of build dependencies... Checking support status of binary dependencies... All dependencies are supported in main or restricted.
Example output for a totally synthetic situation with universe dependencies, non-preferred alternatives in main, and other special cases:
Checking support status of build dependencies... * pmount binary and source package is in universe ... alternative libexif-dev is already in main; consider preferring it * weechat binary and source package is in universe * sendmail-bin is in universe, but its source sendmail is already in main; file an ubuntu-archive bug for promoting the current preferred alternative Checking support status of binary dependencies... * wesnot does not exist (pure virtual?) * wesnoth binary and source package is in universe Please check https://wiki.ubuntu.com/MainInclusionProcess if this source package needs to get into in main/restricted, or reconsider if the package really needs above dependencies.