`nvm install 5` fails unless `nvm ls` before

[hedefalk]

nvm install 5 fails unless I previously did a nvm ls. So nvm ls is obviously not idempotent which is a bit weird?

$ . "$NVM_DIR/nvm.sh"
$ nvm install 5.0 || true
$ nvm use 5.0 || true
Version '5.0' not found - try `nvm ls-remote` to browse available versions.
N/A: version "N/A" is not yet installed.

You need to run "nvm install N/A" to install it before using it.
$ cd $DRONE_DIR
$ rm -rf node_modules
/bin/sh: 46: npm: not found

If I just add a nvm ls before it works:

$ git checkout `git describe --abbrev=0 --tags --match "v[0-9]*" origin`
Note: checking out 'v0.31.6'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by performing another checkout.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -b with the checkout command again. Example:

  git checkout -b new_branch_name

HEAD is now at 31c68ad... v0.31.6
$ . "$NVM_DIR/nvm.sh"
$ nvm ls || true
            N/A
node -> stable (-> N/A) (default)
$ nvm install 5.0 || true
Downloading https://nodejs.org/dist/v5.0.0/node-v5.0.0-linux-x64.tar.xz...
######################################################################## 100.0%
Now using node v5.0.0 (npm v3.3.6)
Creating default alias: default -> 5.0 (-> v5.0.0 *)
$ nvm use 5.0 || true
Now using node v5.0.0 (npm v3.3.6)

[ljharb]

Prior to doing an nvm ls, can you run set -ex; nvm install 5.0 and provide the output?

The || trues are likely masking errors, so it'd be ideal to remove those :-)

[hedefalk]

https://gist.github.com/hedefalk/e1e6d1ddc60ae97ac5ea3bffe3f34afb

Sorry, || true because #993 - basically my build fails on on everything without because set -e from surrounding environment.

[ljharb]

Thanks, I think that cleared it up.