Is it possible to use rename
to uppercase a file but exclude its extension?
ie: I want to rename the file foo_bar.ext to FOO_BAR.ext
I tried with rename 'y/a-z/A-Z/' foo_bar.ext
, but the whole file (including extension) gets uppercased FOO_BAR.EXT
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Answer
You are asking rename
to convert all the instances of [a-z]
to [A-Z]
. Instead, capture the desired string into a group and modify it:
rename 's/([^.]*)/U$1/' foo_bar.ext
This would rename the file foo_bar.ext
to FOO_BAR.ext
.
If you have a file foo_bar.baz.ext
that needs to be renamed to FOO_BAR.BAZ.ext
, use greedy match and multiple groups. Saying:
rename 's/(.*)(..*)/U$1E$2/' foo_bar.baz.ext
would rename the file foo_bar.baz.ext
to FOO_BAR.BAZ.ext
.