How to use genstrings across multiple directories?

One method would be:

find ./ -name "*.m" -print0 | xargs -0 genstrings -o en.lproj

xargs is a nice chunk of shell-foo. It will take strings on standard in and convert them into arguments for the next function. This will populate your genstrings command with every .m file beneath the current directory.

This answer handels spaces in the used path so it is more robust. You should use it to avoid skipping files when processing your source files.

Edit: as said in the comments and in other answers, *.m should be quoted.

I don't know exactly why, but Brian's command didn't work for me. This did:

find . -name \*.m | xargs genstrings -o en.lproj

EDIT: Well, when I originally wrote this I was in a hurry and just needed something that worked. The issue that was occurring for me when using the accepted answer above was that "*.m" has to be quoted (and the curious can find an explanation as to why this is the case in the comments on Brian King's answer). I think that the best solution is to use that original answer with the appropriate bit quoted, which would then read:

find ./ -name "*.m" -print0 | xargs -0 genstrings -o en.lproj

I'm leaving my original reply intact above though, in case it still helps anybody for whatever reason.

This works for me:

find ./ -name \*.m -print0 | xargs -0 genstrings -o en.lproj

Thanks to Brian and Uberhamster.