How do you use Perl's rename to replace the names of all files in a folder with a custom string and an index? I suspect the answer is pretty simple. Still, I haven't been able to piece it together from the manual or the other answers here on SO.
In folder foo I have the files
long complicated name 1.png
random_string_of_letters.png
12312434235512351.png
etc.
The only common denominator is that they have the same extension. I want to rename them
bar1.png
bar2.png
bar3.png
etc.
I'm using Perl's rename (installed via homebrew). The closest I've come is this piece of code from another answer
rename -nvs searchword replaceword *. But I am unable to adapt it to do what I wish. I'm used to read * as a wildcard, but it seems to have a different purpose here. I know that you can use regex if you remove -s from the command, and that regex is different from "normal" regex (see a comment to the same answer linked above). But not how to use it.
When I run brew info rename I get this info:
==> rename: stable 1.601 (bottled), HEAD
Perl-powered file rename script with many helpful built-ins
http://plasmasturm.org/code/rename
/opt/homebrew/Cellar/rename/1.601 (4 files, 44.9KB) *
Poured from bottle using the formulae.brew.sh API on 2023-08-17 at 11:03:56
From: https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/r/rename.rb
From the docs, it looks like the following will do:
rename -Xe '$_ = "bar$N"' *.png
Add a leading -n to do a dry run.
Optionally add -v for more info.