PowerShell_Scripts/Setup-Profile.ps1

[CmdletBinding(SupportsShouldProcess)]param(
  [switch]$sudo,
  [switch]$RemoveOnly,
  [switch]$ShowSkipped,
  [switch]$Force,
  [switch]$GitClone,
  [string]$GitURL = 'https://code.lksz.me/lksz/PowerShell_Scripts',
  [Parameter(DontShow)]
  [string]$MyPSScriptRoot = $MyPSScriptRoot
)

function _Setup {
[CmdletBinding(SupportsShouldProcess)]param(
  [switch]$sudo,
  [switch]$RemoveOnly,
  [switch]$ShowSkipped,
  [switch]$Force,
  [switch]$GitClone,
  [string]$GitURL = 'https://code.lksz.me/lksz/PowerShell_Scripts',
  [Parameter(DontShow)]
  [string]$MyPSScriptRoot = $MyPSScriptRoot)


#######################################################################
## ProfileCode function (source) will contain the code to be written
#######################################################################
function ProfileCode_pre_common {
# # If TMUX isn't loaded, start byobu, then exit this script (and current shell)
# if ( -not ( Test-Path env:TMUX ) ) { byobu; exit }
}
#######################################################################
## common Profile Code - receommended not to change this
## Code will be loaded from profile.d sub-directory after this.
#######################################################################
function ProfileCode_post_common {
# This loads the personal profile section from the $MyPSScriptRoot/profile.d directory
Get-Command Reload-MyScripts -ErrorAction SilentlyContinue | ForEach-Object { . $_.Name }
}

function ProfileCode_common {
function Get-PowerShellPath {
  Get-Process -PID $PID | ForEach-Object { $_.Path,$_.Parent.Path } | Where-Object { $_ -match 'powershell|pwsh' } | Select-Object -First 1
}

function ConvertTo-Base64 {
param([string]$String)
  return [Convert]::ToBase64String([Text.Encoding]::Unicode.GetBytes($String))
}

function Invoke-ExpressionEx() {
[CmdletBinding(SupportsShouldProcess)]param(
  [switch]$sudo,
  [switch]$Force,
  [string]$Function,
  [Parameter(Position = 1, ValueFromRemainingArguments = $true)]
  [string[]]$expr
)

  if( $sudo -and -not $(Test-IsAdmin) ) {
    $local:tmpFile = $null
    if( $Function ) {
      $tmpFile = New-TemporaryFile -WhatIf:$false
      $tmpFile = Move-Item $tmpFile.FullName "$($tmpFile.FullName).ps1" -PassThru -WhatIf:$false
      Export-FunctionSource $Function | Out-File $tmpFile.FullName -WhatIf:$false
      $expr = @( ".", $tmpFile.FullName, ";", $Function ) + $expr
    }

    $expr = @(
        '$WhatIfPreference', '=', "`$$WhatIfPreference", ';',
	'$VerbosePreference', '=', "'$VerbosePreference'", ";",
	'$ErrorActionPreference', '=', "'$ErrorActionPreference'", ";",
	'$ConfirmPreference', '=', "'$ConfirmPreference'", ";"
      ) + $expr
 
    $local:sudo_params = $expr -join ' '
    Write-Verbose "Perofrming the following command line via SUDO:`n{$sudo_params}"
    $local:base64command = ConvertTo-Base64 $sudo_params
    /usr/bin/env sudo $(Get-PowerShellPath) -EncodedCommand $base64command 
    if( $tmpFile ) { Remove-Item $tmpFile }
    return
  }
  
  Write-Verbose "Perofrming the following expression in-line:`n{$($expr -join ' ')}"
  Invoke-Expression "$expr"
}

function Test-IsAdmin{
[CmdletBinding(ConfirmImpact = 'None')]
[OutputType([bool])]
param ()
     
  switch($true){
    $( ($PSVersionTable.PSEdition -eq 'Desktop') -or
       ($PSVersionTable.Platform  -eq 'Win32NT')
    ) {
        # Fastest way on Windows
        ([Security.Principal.WindowsPrincipal](
            [Security.Principal.WindowsIdentity]::GetCurrent()
        )).IsInRole(
            [Security.Principal.WindowsBuiltInRole]'Administrator'
        )
      }
    $( ($PSVersionTable.PSEdition -eq 'Core') -and
       ($PSVersionTable.Platform  -eq 'Unix')
    ) {
        # On macOS and Linux we use ID to figure out if we run elevated (0 means superuser rights)
        return $((id -u) -eq 0)
      }
    default {
        # Unable to figure it out!
        Write-Warning -Message 'Unknown'
  
        return
      }
  }

}

function Export-FunctionSource {
param(
  [switch]$NoHeader,
  [Parameter(Position = 0, ValueFromRemainingArguments = $true)]
  #[ValidateSet([Functions])]
  [string[]]$FunctionName

)

  $local:src = ""
  foreach( $local:func in $FunctionName ) {
    if( -not $NoHeader ) { $src += "`nfunction $func {" }
    $src += "`n"
    $src += $((Get-Command -Type Function $func).Definition) ### .Replace(('$'+'_'),('$$'+'_'))
    if( -not $NoHeader ) { $src += "`n}" }
    $src += "`n"
  }
  return $src.Trim()
}

# Are we running in Unix or Windows?
$global:PathEnvDelimiter = $(if( $PSVersionTable.Platform -match 'unix' ) {':'} else {';'})
function Split-PathEnv {
param([string]$EnvPath)
  $EnvPath -split $PathEnvDelimiter
}

# Establish Module Path
$global:MyPSModulePath = Split-PathEnv $env:PSModulePath | Where-Object { $_ -match "^$($(Resolve-Path ~) -replace '\\',"\\")" }

if( -not $MyPSModulePath ) {
  $MyPSModulePath = $(Join-Path $(Join-Path $(Resolve-Path ~) 'powershell') 'Modules')
  $env:PSModulePath = "$MyPSModulePath$PathEnvDelimiter$env:PSModulePath"
}
if( -not (Test-Path $MyPSModulePath) ) {
  New-Item -ItemType Directory -Path $MyPSModulePath -Force | Out-Null
}
 
Write-Verbose $(Get-Item $MyPSModulePath | Select-Object -ExpandProperty FullName)

# Establish local/personal Script Root and make sure it's in $env:Path
$local:p = Split-PathEnv $env:PATH
$MyPSScriptRoot = Join-Path (Split-Path -Parent $MyPSModulePath) Scripts
Write-Verbose "MyPSScriptRoot = $MyPSScriptRoot"
if( -not (Test-Path $MyPSScriptRoot) ) {
  New-Item -ItemType Directory -Path $MyPSScriptRoot -Force | Out-Null
  New-Item -ItemType Directory -Path $MyPSScriptRoot/profile.d -Force | Out-Null
}
$global:MyPSScriptRoot = $MyPSScriptRoot

$p = @($p[0], $MyPSScriptRoot) + $($p | Select-Object -Skip 1)
$env:PATH = $p -join $PathEnvDelimiter
}
#######################################################################
## Setup-Profile code continues below
#######################################################################

if ( -not $MyPSScriptRoot -or (Test-Path function:Test-IsAdmin,function:ConvertTo-Base64,function:Invoke-ExpressionEx,function:Get-PowerShellPath,function:Export-FunctionSource | Where-Object { -not $_ } | Measure-Object | Select-Object -ExpandProperty Count) ) {
  Write-Verbose "Calling ProfileCode inline..."
  . ProfileCode_common
}

if ( $GitClone -and -not (Test-Path $(Join-Path $MyPSScriptRoot '.git')) ) {
  if( -not [bool]$(Get-Command git -ErrorAction SilentlyContinue)  ) {
    throw "No git command found, you may either omit the -GitClone switch or install git and try again."
  }
  if( $PSCmdlet.ShouldProcess("Pull git repo from $GitURL into $MyPSScriptRoot ?") ) {
    git clone $GitURL $MyPSScriptRoot
  }
}
  
# if( $sudo -and -not $(Test-IsAdmin) ) {
#   $local:sudo_args = @('-MyPSScriptRoot',$MyPSScriptRoot)
#   $ScriptPSBoundParams.Keys | Where-Object {
#       ($ScriptPSBoundParams[$_] -is [Switch]) -and $ScriptPSBoundParams[$_] -and ($_ -notin ('sudo','GitClone','GitURL'))
#     } | ForEach-Object { $sudo_args += "-$_" }
# 
#  return Invoke-ExpressionEx -sudo -Function 'Setup-ProfileInternal' $sudo_args
# }
  
$local:ProfileSignature = [PSCustomObject]([ordered]@{
  Begin = '#### SZ Auto Profile Setup - BEGIN ####' 
  End   = '#### SZ Auto Profile Setup -  END  ####' 
})

function New-ProfileSetupStatus{
param($Name,$Path,$Status,$Exist)
  return [PSCustomObject]([ordered]@{
    Name = $Name
    Path = $Path
    Status = $Status
    Exist = $Exist
  })
}

$local:_profiles= $PROFILE | fl * -Force | Out-String -Stream | ForEach-Object {
    $local:p = $($_ -split '( : /)|(:\\)');
    if( $p[0] -match 'User' ) {
      $p[0].Trim()
    }
  }
$local:_profile = $profile.CurrentUserAllHosts;
$local:randomSeed = "####$(Get-Random)####";
$local:written = $false;

if( $RemoveOnly -and $ConfirmPreference -eq 'High' -and (-not $PSBoundParameters -or -not $PSBoundParameters.ContainsKey('Confirm')) ) {
  $script:ConfirmPreference = 'Low'
}


if( $sudo -or $(Test-IsAdmin) ) { $_profile = $profile.AllUsersAllHosts }
$_profiles | Foreach-Object {
  $local:p = Invoke-Expression "`$profile.$_"
  $local:profileContent = $randomSeed;
  $local:exists = Test-Path $p
  $local:userFile = $($_ -match 'CurrentUser')
  $local:cleanupValue = ''
  if ( $exists -and ((Get-Content -Path $p | Out-String ) -match $ProfileSignature.Begin ) ) {
    Write-Verbose "Found code in [$_]'$p', preparing..."
    $local:gate = $true;
    $profileContent = Get-Content $p | ForEach-Object {
        if( -not $gate ) {
          if ( $_ -match $ProfileSignature.End ) {
            $gate = $true;
	  }
        } else {
	  if ( $_ -match $ProfileSignature.Begin ) {
            $gate = $false;
            $cleanupValue = ' '
	    return $randomSeed;
          }
          return $_
        }
      }
  }

  if( ($p -eq $_profile) -and -not $RemoveOnly ) {
    Write-Verbose "Inserting ProfileCode into $($_)..."
    $profileContent = $profileContent -replace $randomSeed,$((@(
        '',
        $ProfileSignature.Begin,
        '',
        $(Export-FunctionSource -NoHeader ProfileCode_pre_common),
        '',
        '',
        $(Export-FunctionSource -NoHeader ProfileCode_common),
        '',
        '',
        $(Export-FunctionSource -NoHeader ProfileCode_post_common),
        '',
        $ProfileSignature.End
      ) -join "`n" ).Trim().Replace(('$'+'_'),('$$'+'_')))
  }
  $profileContent = $($profileContent -replace $randomSeed,$cleanupValue).Trim()

  $local:shouldSudo = $sudo -and -not $userFile
  $local:status = 'Skipped'
  if( $VerbosePreference -eq 'Continue' ) { $ShowSkipped = $true }
  if( -not ([string]::IsNullOrWhiteSpace($profileContent)) ) {
    $status = "Need $(if($cleanupValue){'Setup'}else{'Cleanup'})"
    if( $sudo -or $userFile ) {
      Write-Verbose "Writing content to $($_)..."
      $local:tmpOutput = New-TemporaryFile -WhatIf:$false
      $profileContent | Out-File $tmpOutput.FullName -WhatIf:$false
      if( $shouldSudo -and $( $PSVersionTable.Platform -eq 'Unix' ) ) {
        Invoke-ExpressionEx -sudo:$shouldSudo chmod 'a+r' $tmpOutput.FullName
      }
      try {
        $local:errMsg = $(Invoke-ExpressionEx -sudo:$shouldSudo "Move-Item $($tmpOutput.FullName) $p -Force:`$$Force -ErrorAction Stop | Out-Null" 2>&1)
	if( $errMsg ) {
          Write-Error "$errMsg"
	  $status = $status -replace 'Need ','Failed '
	} else {
          $status = $status -replace 'Need ',''
	}
      } catch {
	Write-Error "Writing $p failed!"
      }
    } else {
      $status = "Need $status"
      Write-Error "Cannot write into [$_]'$p'! Please re-run with sudo."
    }
  } elseif( ($Force -or $RemoveOnly) -and $exists ) {
    $status = 'Need Removal'
    if( $sudo -or $userFile ) {
      Write-Verbose "Removing [$_]'$p'..."
      try {
        Invoke-ExpressionEx -sudo:$shouldSudo Remove-Item $p
	if( -not (Test-Path $p) ) { $status = 'Removed' }
      } catch {
	Write-Error "Removal of $p failed!"
      }
    } else {
      Write-Error "Cannot remove [$_]'$p'! Please re-run with sudo."
    }
  }
  if( $status -ne 'Skipped' -or $ShowSkipped ) {
    if( $shouldSudo -and $status -ne 'Skipped' ) { $status = "$status via sudo" }
    New-ProfileSetupStatus -Name $_ -Path $p -Status $status -Exist $(Test-Path $p)
  }
}

Remove-Item function:ProfileCode* -Confirm:$false
}

if( -not $SetupFromWeb ) {
  _setup @PSBoundParameters
  Get-Item function:_setup | Remove-Item
}
Remove-Variable SetupFromWeb