dotfiles/PS/PowerShellProfile.ps1

# My powershell profile.

# customize the prompt to be a little more useful
function prompt {
    Write-Host -NoNewLine "["
    Write-Host -NoNewLine -Fore Green ("{0:HH}:{0:mm}" -f $(get-date))
    Write-Host -NoNewLine "] "
    Write-Host -Fore Cyan "${pwd}"
    "PS> "
}

<#
    .Synopsis
        Invoke a scriptblock with evelvated permissions.
#>
function Invoke-Elevated {
    param (
        [ScriptBlock]
        $code
    )
    $outTmpFile = [System.IO.Path]::GetTempFileName()
    $errTmpFile = [System.IO.Path]::GetTempFileName()
 
    $code | Write-Output
    $outTmpFile | Write-Output
    $errTmpFile | Write-Output
    # TODO(jwall): Work on figuring out how to properly redirect output here 
    Start-Process powershell.exe -ArgumentList { &$code 1>$outTmpFile 2>$errTmpFile } -WindowStyle hidden -Verb RunAs
    Get-Content $outTmpFile | Write-Output
    Get-Content $errTmpFile | Write-Output
    Remove-Item $outTmpFile
    Remove-Item $errTmpFile
}

<#
    .Synopsis
        Returns true if you are running with elevated privileges.
#>
function Get-Elevated {
    ([Security.Principal.WindowsPrincipal] `
            [Security.Principal.WindowsIdentity]::GetCurrent() `
    ).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)
}

<#
    .Synopsis
        Create a symlink from a source to a destination.
    
    .Description
        Creates a symlink from a $Source to a $Destination.
        Automatically elevates to administrator privileges
        if necessary.
    
    .Parameter Source
        Required source to create the symlink from.
    
    .Parameter Destination
        Required destination to create the symlink at.
#>
function New-Link {
    param (
        [Parameter(Position = 0, Mandatory = $true)]
        [string[]]
        $Source,

        [Parameter(Position = 1, Mandatory = $true)]
        [string[]]
        $Destination
    )

    # This is a bit of a hack but it's necessary until they make it possible
    # to do symbolic links without administrator privileges
    if (Get-Elevated) {
        New-Item  -ItemType SymbolicLink -Path $Destination -Target $Source
    }
    else {
        # Elevate our permissions for this first.
        Invoke-Elevated {
            New-Item  -ItemType SymbolicLink -Path $Destination -Target $Source
        }
    }
}

<#
    .Synopsis
        Get Powershell Version and optionally the host version.
    
    .Parameter Full
        Show all the version information not just the version
        number and edition.

    .Parameter WithHost
        Show the Host version as well.
#>
function Get-PSVersion {
    param (
        [Parameter(Mandatory = $false)]
        [Switch] $Full,

        [Parameter(Mandatory = $false)]
        [Switch] $WithHost
    )

    if ($Full) {
        $PSVersionTable | 
        if ($WithHost) {
            Get-Host
        }
    }
    else {
        @{ PSVersion = $PSVersionTable.PSVersion; PSEdition = $PSVersionTable.PSEdition }
        if ($WithHost) {
            $HostInfo = Get-Host
            @{HostName = $HostInfo.Name; HostVersion = $HostInfo.Version }
        }
    }
    return $output
}

function Get-Base64-Decoded {
    [CmdletBinding()]
    param (
        [Parameter()]
        [string[]]
        $encoded
    )
    [Text.Encoding]::Utf8.GetString([Convert]::FromBase64String($encoded))
}

function grep {
    $input | out-string -stream | select-string $args
}

# It's way more useful to call this open than ii
Set-Alias -Name open -Value Invoke-Item
Set-Alias -Name ln -Value New-Link
Set-Alias -name which -Value Get-Command

# Add make to our powershell path
$env:PATH = "$env:PATH;C:\Program Files (x86)\GnuWin32\bin;C:\Users\jerem\AppData\Local\Julia-1.3.0\bin;C:\Users\jerem\AppData\Roaming\nvm;C:\Users\jerem\AppData\Local\Google\Cloud SDK\google-cloud-sdk\bin"
$env:NVM_HOME = "C:\Users\jerem\AppData\Roaming\nvm"