I have many lines like the following being returned from a bash command, with different
sourceNodeIds of varying digit lengths:
<NodeAssociation sourceNodeId="33654" [...] sourceNodeEntity="Issue" />
I'd like to pipe it to sed or awk and just return the number nnnn from
cat blah | sed 's/.+?sourceNodeId="\(\d+\)".+/\1/'
but this isn't working. I'm on a Mac if that makes any difference (I think the version of sed may be different). I know Perl regexes, but I think sed is expecting a different kind.