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waltforbesFlag for Bahamas asked on

How can I extract unique rows of text from a list in a text file?

Points of My Scenario:

1, I have a text file that lists groups and their members like so:

2. Each group is separated from the other by an empty line, and the group name is always the first item in its list.

3. I need a way to specify a memberX that will output a file listing all the GROUPs under which memberX appears.

QUESTION: What approach can I use to output a list of all groups for any member I specify?

* text filePowershellScripting LanguagesWindows OS* commandline

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8/22/2022 - Mon

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Personally, I would revisit the process that generates this list, and use a similar tact to get a user based script that finds a user, and lists the group of which it is a member.

See includes a script that extracts info, that you might find helpful.

@oBdA: If I plan to pass the argument "-Member", should delete line 2 from the PowerShell script?

@arnold: the original source & process had to be translated into the current list I now have. Otherwise, your suggestion would be the right approach. Thank you for bringing it forward.
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William Peck

No, that's just the default value for the parameter. If you don't want/need a default value for Member, replace the Param(...) section at the beginning with this:
	$Path = '.\groups.txt'

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@oBdA: the solution works like a charm! That has saved me at least 3 working days of effort! A big bundle thanks for your help.

The link actually includes the script that extracts the data into a CSV
and in the case for you, you need only provide the username whose group membership is of interest to you.

There  would not be a need to process the results after the fact.

Could not post the code as it is derivative from the links included in that question.

It lists all users or members of an OU as an input to the data pull.

in your case the feeder is just one user.
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Many thanks for the insight, arnold. Maybe I can provide more details on my scenario:

1. There are 2 separate AD forests (old and new), where old-forest trusts new-forest.

2. I have to migrate old-forest users to new-forest.

3. Accounts for the users have been set up in new-forest.

4. Groups in new-forest have been created to have equivalent permissions of old-forest groups

5. Old-forest group names are inconsistent, but new-forest group names are created with strict naming conventions.

6. I queried old-forest groups for members, then I translated the users and group names into the equivalent in new-forest

7. The resulting [translated] text file is what I am working with in this case.

At this point, if I queried old-forest members for their groups (as you advise), I would get the list I seek, but it would not be in the translated form (new-forest users & groups). I would have to do that translation work (Ctrl+H: i.e. replace) again.

Interesting though, this all could have been scripted.
you create the translation map, i.e. an array of old groups what they need to be on the new domain.

you can then go through a list of old users, and create the commands to be executed on the new that adds the new user to the respective group on the new domain.

you then run the resulting powershell commands on the new domain, unless you run them after confirming the changes
i.e. looping through the process, and outputing the text as opposed to actually run the command.

@arnold: I do agree with you about this approach under 'usual' circumstances.

Here is another multi-piece part of the puzzle:

1. I am an admin in the old-forest ONLY.

2. The new-forest admin 'regime' has created a web application where users can individually request group-memberships

3. The app includes an approval process that  - if user is approved -  then automates their placement into the new-forest groups.

4. My assigned task is to get the applicable list of new-forest groups to each user - so (s)he can individually apply and go through the approval process.
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James Murphy

My guess is they went the need to know route. providing you with a tidbit each time, effectively causing you to do double the work....

I know right! :-)