You could use find
:
find . -name '*.{cs,aspx,ascx}' | xargs perl -p -i.bak -e "s/thisgoesout/thisgoesin/gi"
This will list all the filenames recursively, then xargs
will read its stdin and run the remainder of the command line with the filenames appended on the end. One nice thing about xargs
is it will run the command line more than once if the command line it builds gets too long to run in one go.
Note that I'm not sure whether find
completely understands all the shell methods of selecting files, so if the above doesn't work then perhaps try:
find . | grep -E '(cs|aspx|ascx)$' | xargs ...
When using pipelines like this, I like to build up the command line and run each part individually before proceeding, to make sure each program is getting the input it wants. So you could run the part without xargs
first to check it.
It just occurred to me that although you didn't say so, you're probably on Windows due to the file suffixes you're looking for. In that case, the above pipeline could be run using Cygwin. It's possible to write a Perl script to do the same thing, as you started to do, but you'll have to do the in-place editing yourself because you can't take advantage of the -i
switch in that situation.