My PowerShell Customizations

Color Themes

The screenshots are taken with moe-dark theme. ConEmu comes with many color schemes, and I also maintain a github repository which contains my favorite color themes for ConEmu. You can check out the GitHub repository.

v1.x (e.g., v1.0.0)

# http://serverfault.com/questions/95431
function Test-Administrator {
    $user = [Security.Principal.WindowsIdentity]::GetCurrent();
    (New-Object Security.Principal.WindowsPrincipal $user).IsInRole([Security.Principal.WindowsBuiltinRole]::Administrator)
}

Import-Module -Name posh-git

$GitPromptSettings.PathStatusSeparator = ''
$GitPromptSettings.AfterStatus.Text += " "

function prompt {
    $origLastExitCode = $LastExitCode

    $prompt = ""

    $prompt += Write-VcsStatus

    if (Test-Administrator) {  # if elevated
        $prompt += Write-Prompt "(Elevated) " -ForegroundColor White
    }

    $prompt += Write-Prompt "$env:USERNAME@" -ForegroundColor Red
    $prompt += Write-Prompt "$env:COMPUTERNAME" -ForegroundColor Yello
    $prompt += Write-Prompt " : " -ForegroundColor DarkGray

    $prompt += Write-Prompt "$($GitPromptSettings.DefaultPromptPath.Expand().Text)" -ForegroundColor Green
    $prompt += Write-Prompt " : " -ForegroundColor DarkGray
    $prompt += Write-Prompt (Get-Date -Format G) -ForegroundColor Blue
    $prompt += Write-Prompt " : " -ForegroundColor DarkGray

    $prompt += Write-Prompt "`n$(if ($PsDebugContext) {' [DBG]: '} else {''})" -ForegroundColor Magenta
    $prompt += "$('>' * ($nestedPromptLevel + 1)) "

    $LastExitCode = $origLastExitCode
    $prompt
}

v0.x (e.g., v0.7.3)

# http://serverfault.com/questions/95431
function Test-Administrator {
    $user = [Security.Principal.WindowsIdentity]::GetCurrent();
    (New-Object Security.Principal.WindowsPrincipal $user).IsInRole([Security.Principal.WindowsBuiltinRole]::Administrator)
}

function prompt {
    # https://github.com/dahlbyk/posh-git/wiki/Customizing-Your-PowerShell-Prompt
    $origLastExitCode = $LastExitCode
    Write-VcsStatus

    if (Test-Administrator) {  # if elevated
        Write-Host "(Elevated) " -NoNewline -ForegroundColor White
    }

    Write-Host "$env:USERNAME@" -NoNewline -ForegroundColor Red
    Write-Host "$env:COMPUTERNAME" -NoNewline -ForegroundColor Yellow
    Write-Host " : " -NoNewline -ForegroundColor DarkGray

    $curPath = $ExecutionContext.SessionState.Path.CurrentLocation.Path
    if ($curPath.ToLower().StartsWith($Home.ToLower()))
    {
        $curPath = "~" + $curPath.SubString($Home.Length)
    }

    Write-Host $curPath -NoNewline -ForegroundColor Green
    Write-Host " : " -NoNewline -ForegroundColor DarkGray
    Write-Host (Get-Date -Format G) -NoNewline -ForegroundColor Blue
    Write-Host " : " -NoNewline -ForegroundColor DarkGray
    $LastExitCode = $origLastExitCode
    "`n$('>' * ($nestedPromptLevel + 1)) "
}

Import-Module -Name posh-git -RequiredVersion 0.7.3

$global:GitPromptSettings.BeforeText = '['
$global:GitPromptSettings.AfterText  = '] '

cddash

You can use the following to have the "dash" functionality - namely, you can go back to the previous location by typing cd -. It is from http://goo.gl/xRbYbk.

function cddash {
    if ($args[0] -eq '-') {
        $pwd = $OLDPWD;
    } else {
        $pwd = $args[0];
    }
    $tmp = pwd;

    if ($pwd) {
        Set-Location $pwd;
    }
    Set-Variable -Name OLDPWD -Value $tmp -Scope global;
}

Set-Alias -Name cd -value cddash -Option AllScope

Boost startup speed

If you feel it takes a lot of time to start a PowerShell session due to your profile script, I found running the following (I saved it as ngen.ps1) in an elevated PowerShell helps a lot.

$env:path = [Runtime.InteropServices.RuntimeEnvironment]::GetRuntimeDirectory()
[AppDomain]::CurrentDomain.GetAssemblies() | % {
  if (! $_.location) {continue}
  $Name = Split-Path $_.location -leaf
  Write-Host -ForegroundColor Yellow "NGENing : $Name"
  ngen install $_.location | % {"`t$_"}
}

Source: http://stackoverflow.com/questions/4208694/.