Crop filenames after certain character?

I have a folder containing about 5000 files with names like:

Invoice 10.1 (2012) (Digital) (4-Attachments).pdf
Carbon_Copy_-_Invoice_No_02_(2010)_(2 Copies)_(Filed).pdf
01.Reciept #04 (Scanned-Copy).doc

I want to rename these files by removing everything from the first bracket onwards, so they look like this:

Invoice 10.1.pdf
Carbon Copy - Invoice No 02.pdf
01.Reciept #04.doc

Automator has replaced the _ for me, but I can't seem to get any further.

[fracai]

I'm not sure that Automator can do this without jumping out to AppleScript, and I'll let someone else tackle that.

There are also several alternatives.
Command Line
Renamer
Name Mangler

[macosnoob]

If by "bracket" you mean "(", Red Menace, a frequent contributor to the Apple forums, has an Automator action for you: Change Name of Finder Items, http://homepage.mac.com/red_menace/S...automator.html. Below you'll see the settings that worked on your three-file sample.

[fracai]

That's nifty, I didn't realize Automator was that intelligent. Does it support full regex renaming?

[Red_Menace]

"Automator" and "intelligent" aren't terms that are normally seen together. Automator started out as a good idea, but Apple really hasn't put much effort into it, so getting workflows to work in some cases can be aggravating.

There are a few actions out there that use regular expressions (for example from BBEdit), it just depends on the purpose of the action. My Change Name of Finder Items action is basically a wrapper around an AppleScript, something that Automator is good at. It is still a bit quirky in that the Automator text fields strip off any leading and trailing whitespace, but it was written to strip characters from a file name by character(s) or index.

[nbevan]

Is the Automator action for: Change Name of Finder Items still available for download from anywhere?