if ((Test-Path Function:\TabExpansion) -and -not (Test-Path Function:\{{prog_name}}TabExpansionBackup)) {

Rename-Item Function:\TabExpansion {{prog_name}}TabExpansionBackup

}

function TabExpansion($line, $lastWord) {

$lastBlock = [regex]::Split($line, '[|;]')[-1].TrimStart()

$aliases = @("{{prog_name}}") + @(Get-Alias | where { $_.Definition -eq "{{prog_name}}" } | select -Exp Name)

$aliasPattern = "($($aliases -join '|'))"

if($lastBlock -match "^$aliasPattern ") {

$Env:{{complete_var}} = "complete-powershell"

$Env:COMMANDLINE = "$lastBlock"

{%- for k, v in extra_env.items() %}

$Env:{{k}} = "{{v}}"

{%- endfor %}

({{prog_name}}) | ? {$_.trim() -ne "" }

Remove-Item Env:{{complete_var}}

Remove-Item Env:COMMANDLINE

{%- for k in extra_env.keys() %}

Remove-Item $Env:{{k}}

{%- endfor %}

}

elseif (Test-Path Function:\{{prog_name}}TabExpansionBackup) {

# Fall back on existing tab expansion

{{prog_name}}TabExpansionBackup $line $lastWord

}

}