svn source-type not honoring proxies

[Kevin W Monroe]

I attempted to build a snap on the launchpad builders that used 'source-type: svn'. These builders are behind an authenticated proxy, and it appears svn doesn't like that. Here you can see my snapcraft.yaml part and subsequent build failure:

http://paste.ubuntu.com/25565855/

The full build log is available here:

https://launchpadlibrarian.net/337431579/buildlog_snap_ubuntu_xenial_amd64_pig_BUILDING.txt.gz

I was able to work around this because my source happens to have a git mirror, and git works fine with launchpad builders. I believe the svn source handler needs to include proxy info (if present) in ~/.subversion/servers, as suggested by this SO answer:

https://stackoverflow.com/questions/1491180/how-to-configure-a-http-proxy-for-svn

[Sergio Schvezov (sergiusens)]

This is an invasive change to execute on a host as it would affect any existing configuration you have, that said, if executing in a container we can certainly try and get this going.

[Neil McPhail (njmcphail)]

There's a comment on that stackoverflow thread that current versions of Subversion honour the http_proxy environment variable. Could that be set a build time on the build server?

[Colin Watson (cjwatson)]

As far as Launchpad goes, this needs to be done in launchpad-buildd, and it's already filed there as bug 1668358. I guess it may still be worthwhile to keep this bug open separately for the case of running "snapcraft cleanbuild" in an environment that requires a proxy.