CODEWITHSUNDEEP
regexpowershell
Mudit Bahedia
Mudit Bahedia

Reputation: 246

Powershell regex for a file path

I want to find out regex for \\mudit.bah.*[ps1|bat] that means path can be like \\mudit.bah.xyz123.ps1 or \\mudit.bah.xyz123.bat xyz123 can be anything. I am using https://rextester.com/tester and trying it however I am able to do till \\{2}mudit.bah.. I am not sure how what to use for * which can be multiple character with .(dots) or without .(dots). Any help on this greatly appreciated.

Upvotes: 1

Views: 6991

Answers (2)

Shamus Berube
Shamus Berube

Reputation: 486

for a regex match like you requested use:

^mudit.bah.*.(ps1|bat)

get-childitem | Where-Object {$_.Name -match "^mudit\.bah.*.(ps1|bat)"}

This will get the files that start with mudit.bah. and end in ps1 or bat. The .* after 'bah' will match any character, including numbers and symbols.

To do this without regex:

Get-ChildItem | Where-Object {($_.Name -like ("mudit.bah." + "*" + ".ps1")) -or ($_.Name -like ("mudit.bah." + "*" + ".bat"))}

Upvotes: 1

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 627022

First of all, [ps1|bat] matches a single char, p, s, 1, b, a or t. To make a group that matches either ps1 or bat, you need a grouping construct, (ps1|bat) or (?:ps1|bat) (non-capturing group).

To match any char as many times as possible other than newline, you may use .*. To restrict it to any char but a dot, use a negated character class, [^.]. Notet that [^.]* will match 0 or more chars other than a dot while [^.]+ will match 1 or more.

Hence, you may use this regex to allow any chars between \\mudit.bah. and ps1 or bat:

^\\{2}mudit\.bah\..*\.(?:ps1|bat)$

Or, with the restriction to only one no-dot part in between them:

^\\{2}mudit\.bah\.[^.]*\.(?:ps1|bat)$

See the regex demo.

Details

  • ^ - start of string
  • \\{2} - two backslashes
  • mudit\.bah\. - a mudit.bah. substring
  • [^.]+\. - any 1+ chars other than . and then a dot
  • (?:ps1|bat) - either ps1 or bat
  • $ - end of string.

Upvotes: 1

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