create symboliclink with powershell - powershell

Question

I write script below to compare and create symboliclink with powershell.
$Source = "C:\Transcode\Powershell\abc&1"
$Destination = "C:\Transcode\Powershell\abc&2"
$filter = '*.txt'
$tmp = "$Source\tmp.log"
$log = "$Source\delete.log"
function New-SymLink ($link, $target)
{
if ($PSVersionTable.PSVersion.Major -ge 5)
{
New-Item -Path $link -ItemType SymbolicLink -Value $target
}
else
{
$command = "cmd /c mklink "
invoke-expression "$command ""$link"" ""$target"""
}
}
Get-ChildItem -Path $Source -Filter $filter -Recurse |
ForEach-Object {
$name=$_.BaseName
$ext=$_.Extension
$fileS=$_.FullName
$fileD="$Destination\$name$ext"
IF (Get-Content $tmp | Where-Object{$_ -match "$name"}){
New-SymLink ("""""$fileD""""","""""$fileS""""")
}
}
I get trouble with file name what contains symbol &.
I can create link by call command promt like this
cmd /c mklink """$Destination\$name$ext""" """$fileS"""
But I want to use function.
Can you help me resovle it

Answer 1

Try this (only partly tested) streamlined version which
escapes the & in $command with a caret ^&
removes redundancy and possibly unneeded quoting
## Q:\Test\2019\04\23\SO_55803869.ps1
$Source = "C:\Transcode\Powershell\abc&1"
$Destination = "C:\Transcode\Powershell\abc&2"
$filter = '*.txt'
$tmp = Get-Content "$Source\tmp.log"
$log = "$Source\delete.log"
function New-SymLink ($link, $target){
if ($PSVersionTable.PSVersion.Major -ge 5){
New-Item -Path $link -ItemType SymbolicLink -Value $target
} else {
$command = 'cmd.exe /c mklink "{0}" "{1}"' -f $link,$target
invoke-expression $command.Replace('&','^&')
}
}
Get-ChildItem -Path $Source -Filter $filter -Recurse | ForEach-Object {
$fileD= Join-Path $Destination $_.Name
IF ($tmp | Where-Object {$_ -match $_.BaseName} ) {
New-SymLink $fileD $_.FullName
}
}