A Gradle tab completion script for (git)Bash

Now also works in git-bash

Do you use gradle from the commandline and sometimes find yourself staring dreamily into the distance at the thought of just pressing tab to see which tasks you can execute?

Well now you can!

Edit:
Okay, well apparently someone had built this already, and gradle even made it repo-official: https://github.com/gradle/gradle-completion

I lost all motivation after I discovered my let's-google-if-someone-already-built-this skills where in need of some polishing, but as I found that the aforementioned official gradle-completion is untested and was a bit over the top for my taste, I decided to finish my own version anyway.

Usage

It is just autocompletion dummy. How did you think you where going to use it?

    $ ./gradlew c[TAB]
check                    clean                    connectedCheck           connectedInstrumentTest

Okay, here it starts getting interesting: sub-projects are now also supported...

    $ ./gradlew proj[TAB]
proj:check               proj:clean               proj:connectedCheck      proj:connectedInstrumentTest

...and of course: flags. Flags expecting files or paths just work like you'd expect them to.

    $ ./gradlew --p[TAB]
--parallel           --profile            --project-cache-dir  --project-dir        --project-prop

    $ ./gradlew --project-cache-dir [TAB]
dir1                dir2

Note on cache:

Results are cached on first run and completion is fast after that. Caches are invalidated by changes in your *.gradle scripts, so tasks that are added or removed are reflected instantly as well.

Installation

The easy way

Install in your user-home with something copy-past-able:

cd ~ #or whereever
curl https://raw.githubusercontent.com/meonlol/gradle-tab-completion/master/gradle-tab-completion.bash -o gradle-tab-completion.bash
chmod +x gradle-tab-completion.bash
LINE="source $(pwd)/gradle-tab-completion.bash"; [[ -e ~/.bash_profile ]] && echo $LINE >> ~/.bash_profile || echo $LINE >> ~/.bashrc

The 'correct' way

Download the script file and put it one of the standard locations for completion scripts:

/etc/bash_completion.d - for all users,
/usr/local/etc/bash_completion.d - for you
~/bash_completion.d - Also for you, but grouped in a neat directory.

The script will then be automatically loaded.

Credit

This script was initially forked from this script by @nolanlawson. Also, after find out he'd already built this, I sometimes looked at what @eriwen did in his script.