rpmbuild: better react on lookaside cache failure?

[fedora-copr-github-bot]

Original issue: https://pagure.io/copr/copr/issue/391
Opened: 2018-09-12 12:25:45
Opened by: praiskup

Today I'm facing this

Running: rpkg -C /tmp/tmpxsjw_oub/rpkg.conf sources --outdir /tmp/tmpv15rj6sh

cmd: ['rpkg', '-C', '/tmp/tmpxsjw_oub/rpkg.conf', 'sources', '--outdir', '/tmp/tmpv15rj6sh']
cwd: /tmp/tmpxsjw_oub/dummy-pkg
rc: 0
stdout: Downloading README.xz
stderr: Could not get download url from http://dev-copr-dist-git.devel.redhat.com/repo/pkgs/%(ns2)s/%(ns1)s/%(pkg)s/%(filename)s/%(hash)s/%(filename)s template. Original error: 'pkg'.

But the build continues and fails much later. It would be nice if we failed ASAP, right after failed download from lookaside cache.

[praiskup]

This is for building from imported sources in Copr dist-git; and we use now copr-distgit-client utility which doesn't suffer from those problems.