GH-706 Update location change message

[agarzola]

Pull Request

This pull request updates the message printed for a user when installing a new version of Node.js via n results in a location change for the binary.

Closes GH-706.

Problem

One of the recommended solutions does not work in Dash:

Note: the node command changed location and the old location may be remembered in your current shell.
         old : /usr/bin/node
         new : /app/.global/bin/node
To reset the command location hash either start a new shell, or execute PATH="$PATH"

See GH-706.

Solution

Update the message to suggest an alternative if using Dash:

Note: the node command changed location and the old location may be remembered in your current shell.
         old : /usr/bin/node
         new : /app/.global/bin/node
If "node --version" shows the old version then start a new shell, or reset the location hash with:
hash -r  (for bash, zsh, ash, dash, and ksh)
rehash   (for csh and tcsh)

ChangeLog

Update location change message with recommendation for Dash.

[agarzola]

This is ready for final review!

[shadowspawn]

Thanks. This situation is very confusing when a user encounters it for the first time and makes n seem broken, so worth trying to help as much as possible.

[shadowspawn]

Example of new message in action:

$ export N_PREFIX=$HOME/.n
$ export PATH=$N_PREFIX/bin:$PATH
$ node --version
v16.13.1
% n 14
  installing : node-v14.18.2
       mkdir : /Users/john/.n/n/versions/node/14.18.2
       fetch : https://nodejs.org/dist/v14.18.2/node-v14.18.2-darwin-x64.tar.xz
   installed : v14.18.2 (with npm 6.14.15)

Note: the node command changed location and the old location may be remembered in your current shell.
         old : /usr/local/bin/node
         new : /Users/john/.n/bin/node
If "node --version" shows the old version then start a new shell, or reset the location hash with:
hash -r  (for bash, zsh, ash, dash, and ksh)
rehash   (for csh and tcsh)
$ node --version
v16.13.1
$ hash -r
$ node --version
v14.18.2

[agarzola]

Thanks for letting me make this small contribution! I've so far had a delightful experience with n and cannot thank you enough for maintaining this project.

[shadowspawn]

Improvements included in n v8.0.2