Add target that bumps version and checksum

[l2dy (Zero King)]

Homebrew has brew bump-formula-pr. Such functionality saves a lot of work when updating many ports. Bumping ports using PortGroup like github and bitbucket should also be supported. Existing revision should be reset or removed.

Use cases (pseudo commands):

• port bump [[portname | pseudo-portname | port-expressions | port-url]] bumps checksums only
• port bump [[portname | pseudo-portname | port-expressions | port-url]] @<version> bumps version and checksums
• port bump --livecheck [[portname | pseudo-portname | port-expressions | port-url]] bumps both with livecheck result

[Schamschula (Marius Schamschula)]

Just be mindful that numerous ports have checksums for multiple files. I personally use a python script to automatically update checksums, but this script has a list of which Portfiles need to be updated manually.

[l2dy (Zero King)]

Checksum for multiple files shouldn't be a problem, simply find and replace every old hash with the corresponding new one should work. Some ports have version set by custom methods so the version has to be updated manually. The Portfile have to be checked afterwards anyway.

[ryandesign (Ryan Carsten Schmidt)]

I use ​my portcheckup script to do this, though I have some local changes that haven't been committed yet.

Just "bumping" checksums is seldom desired; more work is needed to handle that situation correctly; see PortfileRecipes#stealth-updates.

[l2dy (Zero King)]

In the first use case I'd bump the version manually and let port(1) update the checksum.

Take R for example, it's not viable to automate the version bump in base, but the checksum could be automatically updated.

set major 3
set minor 3
set point 3
version                     ${major}.${minor}.${point}