https://bugzilla.redhat.com/show_bug.cgi?id=1563925
Bug ID: 1563925
Summary: Review Request: ghc-cabal-helper - Simple interface to
some of Cabal's configuration state, mainly used by
ghc-mod
Product: Fedora
Version: rawhide
Component: Package Review
Assignee: nobody(a)fedoraproject.org
Reporter: quantum.analyst(a)gmail.com
QA Contact: extras-qa(a)fedoraproject.org
CC: package-review(a)lists.fedoraproject.org
Spec URL:
https://qulogic.fedorapeople.org//ghc-cabal-helper.spec
SRPM URL:
https://qulogic.fedorapeople.org//ghc-cabal-helper-0.8.0.2-1.fc27.src.rpm
Description:
Cabal's little helper provides access to build information gathered by
'cabal'
when configuring a project. Specifically we're interested in retrieving enough
information to bring up a compiler session, using the GHC API, which is similar
to running 'cabal repl' in a project.
While simple in principle this is complicated by the fact that the information
Cabal writes to disk is in an unstable format and only really accessible
through the Cabal API itself.
Since we do not want to bind the user of a development tool which utilises this
library to a specific version of Cabal we compile the code which interfaces
with the Cabal library's API on the user's machine, at runtime, against
whichever version of Cabal was used to write the on disk information for a
given project.
If this version of Cabal is not available on the users machine anymore, which
is fairly likely since cabal-install is usually linked statically, we have
support for compiling the Cabal library also. In this case the library is
installed into a private, isolated, package database in
'$XDG_CACHE_HOME/cabal-helper' so as to not interfere with the user's package
database.
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