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Changes between Initial Version and Version 1 of Ticket #63438, comment 5

initial	v1
1	1	All the actions handled by `action_target` can (by their nature as Portfile targets) only run on the current version in the tree. If the current version of `foo` is 1.1, it's just as impossible to `checksum foo @1.0` as to `install foo @1.0`. The real issue is that we have no way to specify "the current versions in the tree corresponding to the ports that are installed/active/whatever".
2	2
3		It's probably good enough to ignore versions added implicitly from the registry, and only error if the unavailable version was specified by the user. (It would actually be possible to really run targets on the specified version if it is installed, by using the Portfile stored in the registry. But that would probably be even more confusing.)
	3	It's probably good enough to ignore versions added implicitly from the registry, and only error if the unavailable version was specified by the user. (It would actually be possible to really run some targets on the specified version if it is installed, by using the Portfile stored in the registry. But that would probably be even more confusing.)