Add powershell script for installation on windows

[Yakiyo]

This adds a powershell script for installing fnm on windows. The ps script tries to follow the bash script as much as possible. Supported flags are:

• -version | -v for setting version (string)
• -skipShell | -s for skipping shell setup (bool)
• -installDir for setting installation dir (string)

Using only one - seems odd to me but thats how powershell parses arguments. As far as i've tested, it even works with only the first argument too, as in -version, -v and -V all do the same thing.

To install fnm via the script, users would do

$ irm url/to/the/script | iex

The bash script uses the install endpoint, the ps script could do ig https://fnm.vercel.app/install.ps or something.

I've tested the script a few times and ensured that it works.

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[Schniz]

First of all, I'd like to thank you for the time and effort and making the hard thing possible and contributing!

However, in my opinion, any installation script is a toll and out of this project scope, and I originally built the installation script to ease the installation process and it only makes sense for Linux nowadays. Since Windows has WinGet baked in as a standard installation mechanism, I don't really see the point in having a custom PowerShell installer. Do you? can you please explain why should we have an installation script and not offload to WinGet?

[Yakiyo]

ig stuff like scoop and winget does exist which allows people to install fnm. But i dont think everyone uses them. Winget is certainly popular but its yet to be used by everyone, while powershell is always there in windows and a one liner script can just be used to quickly do installations. package managers are great but you wouldnt install one just to get a single app. the script itself wasnt much work, if u wanna use it, sure. if not then its all good.
tldr theres no disadvantages but nor too many advantages either. good when u need it done quick, thats all.

[beegotsy]

can you please explain why should we have an installation script and not offload to WinGet?

Hi @Yakiyo, I would like to install fnm under %HOMEPATH%/.fnm and node versions under %HOMEPATH%/.fnm/versions (or something like that). -installDir would allow me to do that, but winget doesn't.

Also, since the bash script install fnm under $HOME/.fnm I don't understand why on Windows in installed under %APPDATA%/fnm.
It should be, by default, under %HOMEPATH%/.fnm.
The homepath approach is an approach also used by pyenv-win.

Am I missing something?

[alexeyten]

Also, since the bash script install fnm under $HOME/.fnm I don't understand why on Windows in installed under %APPDATA%/fnm. It should be, by default, under %HOMEPATH%/.fnm. The homepath approach is an approach also used by pyenv-win.

Actually default was changed a while ago and now bash script prefers $XDG_DATA_HOME/fnm (which is roughly an equivalent to %APPDATA%/fnm) for fresh installations. It uses $HOME/.fnm for backward compatibility only if the directory already exists.

See https://github.com/Schniz/fnm/blob/master/.ci/install.sh#L8-L16

[beegotsy]

Actually default was changed a while ago and now bash script prefers $XDG_DATA_HOME/fnm (which is roughly an equivalent to %APPDATA%/fnm) for fresh installations.

Okay, now it is clear; I based my previous sentence on the README file without opening the actual scripts.
Thanks for your reply.