Question

OK, so I can run a command like this to get a list of revision numbers made on a certain date or date range:

svn log -q -r{2012-01-25}:HEAD | grep '^r[0-9]' | cut -d\| -f1 | cut -b2-

This works fine and gives me a list like this

12345
12346
12347

Now, I would like to pass these revision numbers to the diff command, so running a simple svn diff on a revision number manually works as expected i.e.

svn diff -c12345

But, if I attempt to pipe the revision list to the diff command like this

svn log -q -r{2012-01-25}:HEAD | grep '^r[0-9]' | cut -d\| -f1 | cut -b2- | xargs svn diff -c

it returns an error that the node was not found – looks to me like I am passing the arguments wrong.

Answer 1

It looks like, in the last part of the pipe, xargs is trying to execute:

svn diff -c 12345 12346 12347

when it should try:

svn diff -c 12345
svn diff -c 12346
svn diff -c 12347

because the -c option only accepts one argument.

To fix that, try to replace xargs with xargs -n1.