78 lines
4 KiB
Markdown
78 lines
4 KiB
Markdown
# PowerShell on Windows
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No I'm not happy about this brain damage. And no there will not be "on MacOS" or "on Linux" flavors, from me anyway.
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# Install and setup
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Windows 11, at the time of writing, doesn't come with the latest PowerShell. It will tell you that when you open PowerShell even. You can acquire it like this (or [some other way](https://learn.microsoft.com/en-us/powershell/scripting/install/installing-powershell-on-windows?view=powershell-7.3)):
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```powershell
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winget install --id Microsoft.Powershell --source winget
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```
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Then clone this repository to the desired `$PROFILE` sorta like this:
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```powershell
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# get the URL from wherever this repo is hosted
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git clone <url> (Split-Path -Parent $PROFILE.CurrentUserAllHosts)
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```
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Or follow along below to understand what this repository is about!
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# `$PROFILE`
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`$PROFILE.CurrentUserAllHosts` is a good place to make customizations (if you're familiar with Bash it's similar to `~/.bashrc`). There is a specific `$PROFILE.CurrentUserCurrentHost` when you're inside VSCodium and other Hosts if you're interested in that but they all inherit from `$PROFILE.CurrentUserAllHosts` which is probably `~/Documents/PowerShell/profile.ps1` by the way!
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## Create `$PROFILE.CurrentUserAllHosts`
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Create a profile with `New-Item` and start editing it with `notepad` (or `codium`).
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```powershell
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New-Item -Path $PROFILE.CurrentUserAllHosts -ItemType "file" -Force
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notepad $PROFILE.CurrentUserAllHosts
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```
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## Custom prompt function
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A very simple first customization one can do is update the prompt. This will indicate whether or not you're running as an Administrator.
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```powershell
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function prompt {
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$prompt = "> "
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if ((New-Object Security.Principal.WindowsPrincipal $(
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[Security.Principal.WindowsIdentity]::GetCurrent()
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)).IsInRole(
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[Security.Principal.WindowsBuiltinRole]::Administrator
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)
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) {
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$prompt = "Admin$prompt"
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}
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$prompt
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}
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```
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I also added `Install-Scoop` and `Install-BleachBit` utility functions. They are totally optional but, I think, useful.
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# `$env:PATH`
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Folders in the semi-colon seperated `$env:PATH` string are searched for cmdlets, executables and scripts to run (again, if you're familiar with Bash it's similar to `$PATH`). Putting the following in `$PROFILE` will make custom `.ps1` scripts in that same folder "global" (available from any prompt without specifying the whole path).
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```powershell
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$env:PATH += ";$(Split-Path -Parent $MyInvocation.MyCommand.Path)"
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```
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[`Split-Path`](https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.management/split-path?view=powershell-7.3) is a pretty useful cmdlet for working with paths. Here we're saying "give me the parent folder for the current command path" which is the `$PROFILE` folder in this context. `$MyInvocation` is from the [automatic variables](https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_automatic_variables?view=powershell-7.3#myinvocation) which are provided by PowerShell under-the-hood.
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## Update-And-Clean.ps1
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With this I've also added a [`Update-And-Clean.ps1`](./Update-and-Clean.ps1) script (in the `$PROFILE` folder) that will update Windows as well as `scoop` if it's installed and then run `bleachbit --preset --clean` (also only if installed) **which depends on whatever you've last checked in the BleachBit UI... so run that and set it up first!** The script will also try to re-invoke itself as Administrator if you're not in an elevated session already... which is usually. If you're familiar with Arch Linux you might say `yay`!
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Checkout the [Crash Course](./CrashCourse.md) for a terse guide on writing your own PowerShell scripts.
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# See Also
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- [About profile (learn.microsoft.com)](https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_profiles?view=powershell-7.3)
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- [Creating profiles (learn.microsoft.com)](https://learn.microsoft.com/en-us/powershell/scripting/learn/shell/creating-profiles?view=powershell-7.3)
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- [Scoop package manager for Windows](https://github.com/ScoopInstaller/Scoop)
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- [BleachBit](https://www.bleachbit.org)
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