Custom PowerShell prompt with current time and available drive space.

profile.ps1

Function PrettySize([int64]$bytes) {
    if     ( $bytes -gt 1TB ) { $result = [string]::Concat([math]::Round($bytes/1TB, 2), " TB") }
    elseif ( $bytes -gt 1GB ) { $result = [string]::Concat([math]::Round($bytes/1GB, 2), " GB") }
    elseif ( $bytes -gt 1MB ) { $result = [string]::Concat([math]::Round($bytes/1MB, 2), " MB") }
    elseif ( $bytes -gt 1KB ) { $result = [string]::Concat([int]($bytes/1KB), " KB") }

    $result
}

Function prompt {
    # .Description
    # This custom version of the PowerShell prompt will present a colorized location value based on the current provider. It will also display the PS prefix in red if the current user is running as administrator, and list available space on drives C: and D:. Based on https://jdhitsolutions.com/blog/powershell/5958/friday-fun-perk-up-your-powershell-prompt/
    # .Link
    # https://go.microsoft.com/fwlink/?LinkID=225750
    # .ExternalHelp System.Management.Automation.dll-help.xml
 
    $user = [Security.Principal.WindowsIdentity]::GetCurrent()
    if ( (New-Object Security.Principal.WindowsPrincipal $user).IsInRole([Security.Principal.WindowsBuiltinRole]::Administrator)) {
        $adminfg = "Red"
    }
    else {
        $adminfg = $host.ui.rawui.ForegroundColor
    }

    $drives = Get-WMIObject -Class Win32_Volume | Select-Object -property DriveLetter,@{Label=’Size’;Expression={PrettySize($_.Capacity)}},@{Label=’FreeSpace’;Expression={PrettySize($_.FreeSpace)}},@{Label=’PctFree’;Expression={[string]::Concat([math]::round($_.FreeSpace / $_.Capacity * 100, 2), '%')}} | Sort-Object DriveLetter | Where-Object {$_.DriveLetter -eq 'C:' -or $_.DriveLetter -eq 'D:'}
    
    foreach ( $drive in $drives ) {
        $driveinfo += "$($drive.DriveLetter) $($drive.FreeSpace) ($($drive.PctFree)); "
    }

    Switch ((get-location).provider.name) {
        "FileSystem" { $fg = "green"}
        "Registry" { $fg = "magenta"}
        "wsman" { $fg = "cyan"}
        "Environment" { $fg = "yellow"}
        "Certificate" { $fg = "darkcyan"}
        "Function" { $fg = "gray"}
        "alias" { $fg = "darkgray"}
        "variable" { $fg = "darkgreen"}
        Default { $fg = $host.ui.rawui.ForegroundColor}
    } 
 
    Write-Host "[$((Get-Date).timeofday.tostring().substring(0,8))] " -NoNewline
    Write-Host "PS " -nonewline -ForegroundColor $adminfg
    Write-Host $driveinfo -NoNewline
    Write-Host "$($executionContext.SessionState.Path.CurrentLocation)" -foregroundcolor $fg -nonewline
    Write-Output "$('>' * ($nestedPromptLevel + 1)) "  
}