bash auto completion

[kedashoe]

An attempt at bash auto completion. Some notes:

• The basic idea is to run the actual Jakefile with some new flags to generate completions (ie, no new parsing code)
• I added an internalOpts function to program.js so we can tell jake in the auto_complete.js wrapper what we are doing
• I don't know anything about auto completion in other shells/OSes (I'm on a debian based system), but I tried to do as much in javascript as possible with the idea that the code could be re-used in other environments. I actually think I may have gone too far here, as some quirks of bash are handled that I doubt would be applicable elsewhere
• Things were complicated quite a bit by needing to support ':' in bash completion. There are some links to stackoverflow answers that helped in bash_completion.sh
• Things also seem to be working if a project does not use a default Jakefile. At first, completions will be default bash completions, but as soon as we've got -f path/to/custom-jakefile, it will start using targets from the custom jakefile for completions
• I did not add any tests, however I ran the current test suite and it appears nothing is broken. To test for now, just source bin/bash_completion.js and test with an executable jake (ie if you have it globally installed, or you have another project that uses jake) EDIT: test included in task_base.js
• not using COMP_CWORD or COMP_POINT
• Looks like the README is mostly just a link to the docs. I have not looked into updating those. Basically can say something like https://github.com/creationix/nvm/blob/master/README.markdown#bash-completion

Let me know what you guys think!

[mde]

This looks great. A couple of things:

• It would be really nice to have at least one smoke test of this, so we make sure we don't regress on it.
• Also (and this is very nit-picky), I notice there are some snake_case variables in this PR. All the Jake code style is pretty coherent. We stick closely to something like this: https://github.com/geddy/js-styleguide

This is pretty fantastic. If you could tweak the code style, and add a basic smoke test, I'd be very excited to merge this PR!

[kedashoe]

Alright PR updated. JS variable style fixed. I added some tests to task_base.js which seemed the best place for them without creating a new test file. Not perfect, better would be to create a shell script that sources bash_complete.sh.. and calls _auto_jake and outputs those results.. which are then checked by the test runner.. or something like that? Maybe could submit a separate PR for that later if I find some more time. Let me know if anything else for now. EDIT: oh and this closes #189 :house_with_garden:

[busticated]

hey there @kedashoe - this looks awesome and is something i've really been wanting myself. anything i can do to help land this? could you possibly rebase it / bring it up to date with current jake master? cc @mde

[kedashoe]

@busticated rebased, ran test suite, looks like everything still passing :fireworks:

[busticated]

@kedashoe nice, thanks! i'll pull it down and try it out :)

[boblauer]

Is there still a possibility of this getting merged?

[mde]

Sorry to take a while to get this merged. Thanks!