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path: root/src/Propellor/Property/Spin.hs
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2015-10-16Added Propellor.Property.Spin, which can be used to make a host be a ↵Joey Hess
controller of other hosts. The hard part of this is avoiding loops of controllers. To make that work, a ControllerChain is passed to the host that's spun, and is added to the Info of the host being spun, where the controller property can check it to detect an avoid a loop. That needed an expansion of the CmdLine data type. I made the new ControlledRun only be used when there is a ControllerChain provided. This avoids breaking backwards compatability with old propellor deployments, as --spin still uses SimpleRun. Note: Making an old propellor deployment be controlled by a controller won't work until it's been updated to this commit, so it knows about the ControlledRun parameter. (Untested)