Split out non-ssh-dependent features into separate lib

Things are coming to a head and it’d be good to split out Fabric’s task execution stuff into its own “third party” tool/library so it can be used/referenced independently of our SSH functionality.

Right now, anybody wanting to use Fab-as-runner must still install ssh and PyCrypto, which sucks.

And if we’re splitting it between task running and SSH, having “Fabric” be “SSH + dependency on new runner tool” makes much more sense (both re: backwards compatibility, and overall usefulness) than vice versa.

Speaking of backwards compat, I am marking this 2.0 because it makes more sense to do it at a 2.0 backwards incompat barrier (since at the very least it adds a new install dependency to Fabric), but doing the split in, say, 1.6 or 1.7 should also be quite possible if the timing is better.

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To be clear, this new tool would:

• Maybe, possibly, but probably not just be us glomping onto an existing tool like Paver
  • Paver tries to do too much and I’ve never been a big fan of how its API feels
  • Really not aware of any other tools that are at all well known and fit the use case any better
  • EDIT: Baker actually looks half decent, though it’s obviously not a perfect match (nothing would be, anything would require some tweaks.)
• Have a distinct identity from Fabric, while probably remaining “affiliated”
  • Name brainstorm incoming.
• Encompass the “run Python callables as tasks from the CLI with args” functionality that currently exists within Fabric
• Likely entail some refactoring of how that machinery works, if only just to make post-ripout integration easier
• Probably get some of the remaining big task-runner “missing features” implemented right off the bat (really just #452)

[tebanep]

Any ETA for Fabric 2.0 and Invoke 1.0 as Python 3.5 was released yesterday and will be the default in Ubuntu 16.04 LTS?

[dmr]

I started switching to invoke in combination with shell commands and some Paramiko because fabric is the last package without python3 support in my project