Posh Beautify - A PowerShell script to make your shell awesome!

posh-beautify.ps1

# Author: Aaron Carneiro <hello@aaroncarneiro.com>
# Name: Posh Beautify - A PowerShell script to make your shell awesome!
# Description: This script installs and configure Oh-My-Posh with Starship, and JetBrainsMono Nerd Font along with it's dependencies.
# Version: 1.0.0 - APR 04 2022

#Requires -RunAsAdministrator

# Function to check if a dependency is installed and install it if it's not
Function Resolve-Dependency 
{
  Param(
    [Parameter(Mandatory=$true)]
    [string]$Name,
    [Parameter(Mandatory=$true)]
    [string]$Run,
    [Parameter(Mandatory=$true)]
    [string]$Install,
    [Parameter(Mandatory=$true)]
    [string]$Upgrade,
    [Parameter(Mandatory=$false)]
    [string]$RequiredTo = ""
  )

  if((Test-CommandExists -Command $Run).Equals($true)) {
    Write-Host "$Name is already installed. " -ForegroundColor Cyan
    $willUpgrade = Read-Host "Do you want to upgrade it? (Recommended) [Y/n]"
    $willUpgrade = $willUpgrade.ToLower()

    if($willUpgrade.Equals("y")) {
      Invoke-Expression $Upgrade
    }
  } else {
    Write-Host "$Name is not installed. " -ForegroundColor Red -NoNewline
    if($RequiredTo.Length -gt 0) {
      Write-Host "It is required to $RequiredTo." -ForegroundColor Red
    }
    $Install = Read-Host "Do you want to install it? [Y/n]"
    $Install = $Install.ToLower()

    if ($Install.Equals("y")) {
      Write-Host "Installing $Name..."
      Invoke-Expression $Install      
    } else {
      Write-Host "Ok, skipping $Name..."      
    }    
  }
} #End Function Resolve-Dependency

Function Test-CommandExists
{
  Param ($Command)

  $oldPreference = $ErrorActionPreference
  $ErrorActionPreference = 'stop'  
  
  try {if(Get-Command $Command){$true}}

  Catch {$false}

  Finally {$ErrorActionPreference=$oldPreference}
} #End Function Test-CommandExists

# Main #################################################################################################################

Write-Host "Hello " -NoNewline
Write-Host "$env:USERNAME" -ForegroundColor Blue -NoNewline
$Accept = Read-Host ", ready to make this terminal more interesting? [Y/n]"
$Accept = $Accept.ToLower()

if ($Accept.Equals("y")) {
  if (!$env:OS.ToLower().Contains("windows")) {
    Write-Warning "Sorry, this script is only for Windows."
    exit 0;
  }

  # Install or Update Dependencies
  Write-Host "Verifying dependencies..."
  Resolve-Dependency -Name "Oh-My-Posh" -Run "oh-my-posh" -Install "winget install JanDeDobbeleer.OhMyPosh -s winget" -Upgrade "winget upgrade JanDeDobbeleer.OhMyPosh -s winget" -RequiredTo "install Spaceship Prompt"
  Resolve-Dependency -Name "Chocolatey" -Run "choco" -Install "Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://community.chocolatey.org/install.ps1'))" -Upgrade "choco upgrade chocolatey" -RequiredTo "install JetBrainsMono Nerd Font"
  
  # Refreshing system environment variables
  $Env:Path = [System.Environment]::GetEnvironmentVariable("Path","Machine") + ";" + [System.Environment]::GetEnvironmentVariable("Path","User")

  # Install Starship
  Write-Host "Adding Oh-My-Posh with Spaceship to your PowerShell Profile..." -ForegroundColor Cyan

  if (!(Test-Path -Path $PROFILE)) {
    New-Item -ItemType File -Path $PROFILE -Force
  }

  $CurrentProfile = Get-Content -Path $PROFILE -Raw
  Set-Content -Path $PROFILE -Value "oh-my-posh init pwsh --config '$env:POSH_THEMES_PATH\spaceship.omp.json' | Invoke-Expression" -Force
  Add-Content -Path $PROFILE -Value $CurrentProfile
  Add-Content -Path $PROFILE -Value "clear" -NoNewline

  # Install JetBrains Mono Nerd Font
  $NerdFont = Read-Host "Do you want to install JetBrains Mono Nerd Font? [Y/n]"
  $NerdFont = $NerdFont.ToLower()

  if ($NerdFont.Equals("y")) {
    Write-Host "Installing JetBrains Mono Nerd Font..."
    choco install JetBrainsMonoNF -y
    Write-Host "Remember to configure your terminal to use this font." -ForegroundColor Yellow
    Write-Host "For help, go to https://learn.microsoft.com/en-us/windows/terminal/customize-settings/profile-appearance" -ForegroundColor Yellow
  } else {
    Write-Host "Ok, skipping JetBrains Mono Nerd Font..."      
  }
  
  # Refreshing PowerShell Profile
  Write-Host "Refreshing PowerShell Profile..." -ForegroundColor Cyan
  try {
    $PreviuosErrorPreference = $ErrorActionPreference
    $ErrorActionPreference = 'stop'
    Invoke-Expression $PROFILE -ErrorAction SilentlyContinue
    $ErrorActionPreference = $PreviuosErrorPreference
  } catch {
    Write-Warning "Warning! Something went wrong. Please, restart your shell."
  }

  Write-Host "Done! Enjoy your modern shell!" -ForegroundColor Green
  Write-Host "To make it even nicer try adding a color scheme like https://draculatheme.com/windows-terminal"
  Write-Host "Or try adding some PowerShell modules to improve your productivity! https://powershellgallery.com"
} else {
  Write-Host "Ok, maybe next time."
}