Get the next string after validating patterns using powershell - regex

Question

I have a text file and the contents can be:
debug --configuration "Release" \p corebuild
Or:
-c "Dev" debug
And now I have to validate the file to see if it has any pattern that matches --configuration or -c and print the string next to it
Pattern 1 - It should be Release
Pattern 2 - It should be Dev
How to achieve this in single command?
I tried below , but not sure how to extract only the release in the text , I only tried to see 1 pattern at a time
PS Z:\> $text = Get-Content 'your_file_path' -raw
PS Z:\> $Regex = [Regex]::new("(?<=\-\-configuration)(.*)")
PS Z:\> $Match = $Regex.Match($text)
PS Z:\> $Match.Value
**Release /p net**
Any help would be appreciated

Answer 1

If I understand correctly and you only care about extracting the argument to the parameters and not which parameter was used, this might do the trick:
$content = Get-Content 'your_file_path' -Raw
$re = [regex] '(?i)(?<=(?:--configuration|-c)\s")[^"]+'
$re.Matches($content).Value
See https://regex101.com/r/d2th35/3 for details.
From feedback in comments --configuration and -c can appear together, hence Regex.Matches is needed to find all occurrences.

Answer 2

To complement Santiago's helpful answer with a PowerShell-only alternative:
Assuming that a matching line only ever contains --configuration OR -c, you can avoid the need for .NET API calls with the help of the -match operator, which outputs a Boolean ($true or $false) to indicate whether the input string matches, and also reports the match it captures in the automatic $Matches variable:
# Note: Omitting -Raw makes Get-Content read the file *line by line*.
Get-Content 'your_file_path' |
ForEach-Object { # Look for a match on each line
# Look for the pattern of interest and capture the
# substring of interest in a capture group - (...) -
# which is later reflected in $Matches by its positional index, 1.
if ($_ -match '(?:--configuration|-c) "(.*?)"') { $Matches[1] }
}
Note:
-match only every looks for one match per input string, and only populates $Matches if the input is a single string (if it is an array of strings, -match acts as a filter and returns the subarray of matching elements).
GitHub issue #7867 proposes introducing -matchall operator that looks for all matches in the input string.
See this regex101.com page for an explanation of the regex.