rebar should expand VCS version in the top directory, if possible #173
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When a VCS tag is present in the reltool.config file, rebar tries
to expand it. However, it does so in the rel/ directory, which
(at least for git) may not reveal the latest version.
A problem is that if rebar was called with
cd rel; rebar generate
,rebar will not know what the top directory is. This can be solved
by instead running
rebar generate skip_deps=true
from the topdirectory. This patch makes rebar_rel_utils use base_dir instead
of the directory of reltool.config.