get text inside a section and remove the empty section in PowerShell

Question

I have a file with below content

parallel (

   {
 
       some content 1
       some content 2
       build ( 'Job3', parameter5: value5)
       some content 3
       some content 4

   }

)

parallel (

{ 

       some content 5
       some content 6
       build ( 'Job2', parameter3: value3, parameter4: value4)
   }

)


build ( 'Job1', parameter1: value1, parameter2: value2)

I need to keep only the content which is inside parallel ({ }) and remove the parallel({ }) section from the file. Note: The tricky part is t

Expected output

some content 1
some content 2
build ( 'Job3', parameter5: value5)
some content 3
some content 4
some content 5
some content 6
build ( 'Job2', parameter3: value3, parameter4: value4)
build ( 'Job1', parameter1: value1, parameter2: value2)

Answer 1

You can parse it with regex, see https://regex101.com/r/DiDgli/1 for details.

$re = [regex] '(?mi)(?<=parallel\s*\(\s*\{)(?:\s*\b([^\r\n]+))+|(^build[^)]+\))'
$re.Matches((Get-Content path\to\file.txt -Raw)) | ForEach-Object {
    if ($_.Groups[1].Success) {
        return $_.Groups[1].Captures.Value
    }

    $_.Groups[2].Value
}