clang-3.7: Subversion fetch fails if behind HTTP proxy

[raimue (Rainer Müller)]

As reported on IRC, the post-extract in the clang-3.7 port cannot be executed when behind a HTTP proxy:

:notice:extract --->  Extracting clang-3.7
:debug:extract Executing org.macports.extract (clang-3.7)
:debug:extract Executing proc-post-org.macports.extract-extract-0
:info:extract svn: E120108: Unable to connect to a repository at URL 'http://llvm.org/svn/llvm-project/cfe/trunk'
:info:extract svn: E120108: Error running context: The server unexpectedly closed the connection.
:info:extract Command failed: cd /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_llvm-3.7/clang-3.7/work/trunk/tools && svn co -r 235803 http://llvm.org/svn/llvm-project/cfe/trunk clang
:info:extract Exit code: 1
:error:extract org.macports.extract for port clang-3.7 returned: command execution failed

The fetch phase worked because base is using arguments for svn to tell it about the HTTP proxy in the system. This also applies to other subports of llvm-3.7 with specific variants.

See attached patch for a proposed workaround.

[jeremyhu (Jeremy Huddleston Sequoia)]

Go ahead and push, thanks.

[larryv (Lawrence Velázquez)]

Thanks, Rainer. r135930