help with generating a diff with svn for libcxx

[Michael Dickens]

Guessing that you've run into a local permissions issue. This happens
with any repo manager: if it can't access a required file, it can't do
squat! I regularly do "chmod -R u+rw ." from the top level of my local
repos to make sure at least -I- can access all of the files. That said,
glad you found a way around the issue. Cheers! - MLD

On Sun, Dec 3, 2017, at 03:35 PM, Ken Cunningham wrote:
> I decided to just page back in time over and over through the github
> interface until I found the commit that way, and generated the diff by
> adding ".diff" on the end of the URL. Not the right way to do it, I know
> -- but it worked.
> 
> <https://github.com/llvm-mirror/libcxx/commit/b2e9337b06425b4af554651d5f2fa65615eb009f.diff>
> 
> Happy to learn the " right way" when anyone has time.
> 
> Thanks,
> 
> K
> 
> 
> On 2017-12-03, at 12:28 PM, Ken Cunningham wrote:
> 
> > I'm getting stuck generating a diff file for the changes made in revison 307461 of libcxx, so I can backport that into llvm-4.0 to fix the build of libcxx for PowerPC.
> > 
> > <http://llvm.org/viewvc/llvm-project?view=revision&revision=307461>
> > 
> > I have checked out the llvm, libcxx, and libcxxabi sources using svn.
> > In the projects/libcxx directory, I tried
> > 
> > svn diff -r 307460:307461
> > but that gives me "svn: E175013: Access to '/svn/llvm-project/!svn/vcc/default' forbidden"
> > 
> > so I've tried
> > 
> > svn diff -r 307460:307461 http://llvm.org/svn/llvm-project/libcxx/trunk
> > svn diff -r 307460:307461 http://llvm.org/svn/llvm-project/libcxx/trunk .
> > svn diff -r http://llvm.org/svn/llvm-project/libcxx/trunk@307460 http://llvm.org/svn/llvm-project/libcxx/trunk@307461
> > 
> > but that all gives a similar error.
> > 
> > I know this must be easy, otherwise nobody would be using svn.
> > 
> > I thought about using the github sources, but finding svn revision 307461 for libcxx in github is not simple either.
> > 
> > Open to ideas.
> > 
> > Thanks,
> > 
> > Ken
>