npm package breaks bash completion

[Ben Davis]

The /etc/bash_completion.d/npm file breaks bash completion. Tested in Ubuntu 12.10 and 13.04. I reproduced this on a fresh install of 13.04. Basically what happens is when you try to complete a command that has an argument/flag that accepts a filename, it completes the filename but removes the entire argument. For example, tab-completing "grep --exclude-dir=/ho" becomes "grep /home". Same with other commands such as dd.

Steps to reproduce:

$ sudo apt-get install npm
$ bash
$ grep --exclude-dir=/ho<tab>
$ dd if=/ho<tab>

You'll see that when you try to tab-complete those commands for the /home dir, it removes the previous argument.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Ian Schneider (planablediglet)]

Since it took me a while to track this down, I'll share the actual source of the problem - the completion script removes the '=' character from COMP_WORDBREAKS

COMP_WORDBREAKS=${COMP_WORDBREAKS/=/}

[Stefan Fleischmann (sfleischmann)]

This bug is still present (Ubuntu 14.04, 14.10 and 15.04).

Upstream bug report: https://github.com/npm/npm/issues/4530