如何使用 PowerShell 清除文本文件中返回的变量值？

Question

I have text files with values I would like to blank out using a PowerShell script.

For example, there are the following variables and their corresponding values:

Customer FirstName = CHRISTINE
Customer LastName = TOWN
CRN = 211021815L

I would like the script to go through the contents of the file and replace the returned values so they appear as below:

Customer FirstName = ******
Customer LastName = ******
CRN = ******

Ideally, the number of asterisks will be the same for every returned value so that no information can be derived from it. As in, if the Customer FirstName returnd value is 8 characters, the number of asterisks should NOT match 8 characters. It should be arbitrary.

Note that I have seen an existing question asked that is similar but the person asks how to insert a variable value into a placeholder rather than replacing an already retured value. As the returned value within my text files are constantly changing, a different solution is needed.

I am very new to PowerShell but came up with something pretty basic below:

(Get-Content C:\Temp\Logs\logfile.log).replace('CRN = <REGEXPRESSIONHERE>', '*****') | Set-Content C:\Temp\Logs\logfile.log

Is there a nicer way to accommodate for more variables in the single line rather than having a line to replace the returned value for each variable that needs to be blanked out?

Answer 1

Here's a possible solution:

( Get-Content .\logfile.log | ForEach-Object { $_ -replace "(.+) = .+", "`$1 = ****" } ) | Set-Content .\logfile.log

I believe you have to allow Get-Content and ForEach-Object to complete before writing back to the same file. That's the reason for the extra set of parentheses.