Subversion (svn) update to source tree containing nested checkouts (like clang/llvm)

Question

I've building clang/llvm frequently on various systems following the "Getting Started" instructions (http://clang.llvm.org/get_started.html). The SVN folks are really into modularity but don't seem to use the SVN "externals" mechanism, so they require three separate checkouts (llvm, clang, compiler-rt) into a single source tree (with one optional: extra).

Every now and then I build an updated version by doing "svn up" in the source tree root ("llvm") and then rebuilding.

Today, for the first time, I wondered if I should be doing an "svn up" in each separate checkout sub-directory or whether SVN is smart enough to do "recursive updates for nested checkouts". Couldn't find an answer after searching a bit so I am here now.

Thanks!

Answer 1

SVN is smart enough to do "recursive updates for nested checkouts"

AFAIK, outside the use of externals, SVN is not smart enough to know about nested checkouts.

Answer 2

find . -name ".svn" -type d | xargs dirname | xargs svn update