[GSoC] migration

[Bradley Giesbrecht]

> On Jul 12, 2017, at 3:10 PM, Umesh Singla <umeshksingla at macports.org> wrote:
> 
> Hi Brad,
> 
> With another week over, I have the following updates to share. These are actually the points from my Notes as I keep going on, so the email might not be well crafted. Thought, would share with you without any delay.
> 
> Week #5-6 (28 Jun - 12 Jul)
> 
> Golden lines for the project:
> 
> 	• A snapshot would be a list of install commands that created the current installed state. 
> 	• Restoring a snapshot would deactivate the active ports and reproduce the install commands for the selected snapshot. 
> 	• Migrate would amount to creating a new snapshot, uninstalling installed ports and reproducing the install commands for the last snapshot.
> @Brad: Did you miss “uninstalling installed ports” in the second point above?

No. I imagined being able to switch between snapshots with minimal building. Migration would uninstall because we are changing platforms.

Regards,
Bradley Giesbrecht (pixilla)