non-standard $IFS can cause nvm install failures

[apsoto]

The change of the field separator from space to \n\t triggers the problem.

I worked around it by setting the IFS back to default in my bash script, I assume nvm needs to find a similar work around

IFS=$' ' # nvm expects the default field separator
  # DO nvm stuff
IFS=$'\n\t' # reset to use bash strict mode

The field separator is changed because I use bash strict mode for my CI build script which invokes nvm install

http://redsymbol.net/articles/unofficial-bash-strict-mode/

• Operating system and version:
  various, also see sort command not found #1227 and -bash: nvm_ls node: command not found #1514, I'm experiencing specifically on Ubuntu

• nvm debug output:

$ nvm debug
nvm --version: v0.33.2
$SHELL: /bin/bash
$HOME: /home/bamboo
$NVM_DIR: '$HOME/.nvm'
$PREFIX: ''
$NPM_CONFIG_PREFIX: ''
$NVM_NODEJS_ORG_MIRROR: ''
$NVM_IOJS_ORG_MIRROR: ''
shell version: 'GNU bash, version 4.3.30(1)-release (x86_64-pc-linux-gnu)'
uname -a: 'Linux 3.19.0-43-generic #49-Ubuntu SMP Sun Dec 27 19:43:07 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux'
OS version: Ubuntu 15.04
curl: /usr/bin/curl, curl 7.38.0 (x86_64-pc-linux-gnu) libcurl/7.38.0 OpenSSL/1.0.1f zlib/1.2.8 libidn/1.28 librtmp/2.3
wget: /usr/bin/wget, GNU Wget 1.16.1 built on linux-gnu.
git: /usr/bin/git, git version 2.1.4
nvm current: v0.12.7
which node: $NVM_DIR/versions/node/v0.12.7/bin/node
which iojs:
which npm: $NVM_DIR/versions/node/v0.12.7/bin/npm
npm config get prefix: $NVM_DIR/versions/node/v0.12.7
npm root -g: $NVM_DIR/versions/node/v0.12.7/lib/node_modules

• nvm ls output:

$ nvm ls
->      v0.12.7
         v4.2.4
         system

• How did you install nvm? (e.g. install script in readme, homebrew):
  chef

• What steps did you perform?

• What happened?
  nvm install fails

• What did you expect to happen?

• Is there anything in any of your profile files (.bashrc, .bash_profile, .zshrc, etc) that modifies the PATH?

• If you are having installation issues, or getting "N/A", what does curl -I --compressed -v https://nodejs.org/dist/ print out?

[ljharb]

Indeed related to #1244, #1514, #1227.

For some reason this "bash strict mode" thing has popped up in the last week, and rarely before, even though that article has been up since at least May 2014.