hadoop shell commands auto-completion

For many users including myself, one of the nice features of BASH is its tab completion, which saves us so much typing. So, when I switched to the Hadoop Shell, it feels so inconvenient since there are many commands and options to remember.

Then I searched around and found one hadoop completion script from Facebook hadoop-20 github repo, but the script does not work for my hadoop installed using Homebrew.

So, I modified it to make it work. You can try it out from my hadoop-completion repo on github. All the installation instructions are there:

https://github.com/guozheng/hadoop-completion

BTW, Bash-Completion includes a collection of similar auto-completion scripts, highly recommend to use it. You will find your life with git cli, ssh, etc. much easier.


References:

- Programmable Bash Completion Buildins (for compgen and complete commands)

- Write your own Bash Completion Function (how to write a customized Bash completion script)

- Get Bash Completion for Mac OS X (a set of built-in scripts for commonly used tools, svn, make, gzip, ssh, git, etc., note that you will need to install git CLI using Homebrew to install the git completion scripts)