Customizing a package in a snapshot
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Jean-Marc Notin
Jun 6, 2016, 7:05:33 AM6/6/16
to Stackage
Hi,
I am facing a problem with a package from Stackage, namely
pandoc-citeproc. But i guess my issue is not specific to
pandoc-citeproc.
To do its job, pandoc-citeproc relies on several data files; the path
to these files is hard-coded at compile time. Yet, everything works
fine using stack; the problem arise when I want to run my application
outside the stack environment : pandoc-citeproc complains about not
finding its data-files.
Fortunately, pandoc-citeproc offers a flag at compile time that embed
the data files in the binary package. So when I was using Cabal only,
I could manually compile pandoc-citeproc enabling that flag. But now
that I am using Stack, I did not find a similar workaround.
Specifically, I found a way in the documentation to pass flags to
extra deps packages, but not to packages from the stackage snapshot.
Is there a way to force a flag when compiling a package from a
snapshot ? Or at least is there a way to force stack to use a
customized version of a package ?
Thank you for your help !
--
Jean-Marc Notin
I am facing a problem with a package from Stackage, namely
pandoc-citeproc. But i guess my issue is not specific to
pandoc-citeproc.
To do its job, pandoc-citeproc relies on several data files; the path
to these files is hard-coded at compile time. Yet, everything works
fine using stack; the problem arise when I want to run my application
outside the stack environment : pandoc-citeproc complains about not
finding its data-files.
Fortunately, pandoc-citeproc offers a flag at compile time that embed
the data files in the binary package. So when I was using Cabal only,
I could manually compile pandoc-citeproc enabling that flag. But now
that I am using Stack, I did not find a similar workaround.
Specifically, I found a way in the documentation to pass flags to
extra deps packages, but not to packages from the stackage snapshot.
Is there a way to force a flag when compiling a package from a
snapshot ? Or at least is there a way to force stack to use a
customized version of a package ?
Thank you for your help !
--
Jean-Marc Notin
Michael Snoyman
Jun 9, 2016, 12:36:15 PM6/9/16
to Jean-Marc Notin, Stackage
If you add pandoc-citeproc to your extra-deps, you should be able to override the flag. In addition, it might make sense to modify the Stackage configuration (see the flags section of https://github.com/fpco/stackage/blob/master/build-constraints.yaml) to set that flag by default, if you'd like to send a PR to do so.
--
Jean-Marc Notin
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Jean-Marc Notin
Jun 10, 2016, 2:31:46 PM6/10/16
to Stackage
Hi,
Thank you for your answer ! Indeed, I missed the 'extra-deps' thing.
Actually, it was documented in the Stackage's FAQ[1]. Shame on me...
[1] http://docs.haskellstack.org/en/stable/faq/#i-need-to-use-a-different-version-of-a-package-than-what-is-provided-by-the-lts-haskell-snapshot-im-using-what-should-i-do
Best,
--
Jean-Marc Notin
Thank you for your answer ! Indeed, I missed the 'extra-deps' thing.
Actually, it was documented in the Stackage's FAQ[1]. Shame on me...
[1] http://docs.haskellstack.org/en/stable/faq/#i-need-to-use-a-different-version-of-a-package-than-what-is-provided-by-the-lts-haskell-snapshot-im-using-what-should-i-do
Best,
Jean-Marc Notin
Dan Burton
Jun 10, 2016, 3:00:38 PM6/10/16
to Jean-Marc Notin, Stackage
Perhaps we should additionally encourage the pandoc-citeproc package to enable this flag by default.-- Dan Burton
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