Automatic daily builds process

Launchpad performs regular (once per few hours) clone of our git repository.
This process can be observed on Sources page.
If necessary, it is possible to trigger fresh clone immediately (Import Now button)

All packages required for building of vcmi are defined in debian/control file
Launchpad will automatically install build dependencies during build
Dependencies of output .deb package are defined implicitly as dependencies of packages required for build

Every 24 hours Launchpad triggers daily builds on all recipes that have build schedule enable. For vcmi this is Daily recipe
Alternatively, builds can be triggered manually using "request build(s) link on recipe page. VCMI uses this for Stable recipe

Version of resulting .deb package is set in recipe content, e.g {debupstream}+git{revtime} for daily builds
Base version (referred as debupstream on Launchpad is taken from source code, debian/changelog file
CMake configuration settings are taken from source code, debian/rules file
Branch which is used for build is specified in recipe content, e.g. lp:vcmi master

Workflow for creating a release build

if necessary, push all required changes including debian/changelog update to vcmi/master branch
Go to Sources and run repository import.
Wait for import to finish, which usually happens within a minute. Press F5 to actually see changes.
Go to Stable recipe and request new builds
Wait for builds to finish. This takes quite a while, usually - over a hour, even more for arm builds
Once built, all successfully built packages are automatically copied to PPA linked to the recipe
If any of builds have failed, open page with build info and check logs.