Makes optional shared paths and basedir shared files creation

[skuark]

Hi! I've updated ansistrano from an old version, and the project deployment has failed.

After investigating the problem, I've found a couple of tasks that were added in #142 to prepare shared folders before symlinking. It also makes sense for most of our projects and environments, but in a node from a particular client, the state: directory causes the task fails because the path exists as a symlink to another directory in the filesystem.

I think it could be good to make these tasks optional, enabled via ansible defaults, but overridable by the user. For now that approach is working for us.

[ricardclau]

You are right, it is perhaps a bit of an edge case but it can be useful for cases like this one you are describing

Too bad it is all or nothing if you have 2 or 3 shared paths but in that case you could add the remaining ones in a hook

And no BC breaks which is great!

[ricardclau]

Can you please add these new variables to the README as well?

[skuark]

Of course, here it is. Thanks Ricard!

[ricardclau]

Sorry to be picky with naming, I was checking this from my phone and did not check in depth.

I think the variables should be different in terms of pluralisation

ansistrano_ensure_shared_paths_exist instead of ansistrano_ensure_shared_paths_exists
ansistrano_ensure_basedirs_shared_files_exist instead of ansistrano_ensure_basedir_shared_files_exists

[skuark]

Don't worry, you are right. Fixed.

[ricardclau]

Thanks!