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nixpkgs/pkgs/applications/misc/gitit/default.nix
Profpatsch 91340aeea8 gitit: init at 0.13.0.0
This was broken in `haskellPackages` for a long time, but it’s back!

Time to give it a place in the toplevel and a prope) treatment:

* Semi-static binary
* Remove all references to `Paths_` modules of dependencies
* gitit tries very hard to have a runtime dependency on GHC, disable
  that by default.

Also added myself as a maintainer, let’s try to keep this working from
now on.

Fixes https://github.com/NixOS/nixpkgs/issues/32377
2020-06-12 13:21:34 +02:00

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{ lib, haskellPackages, haskell, removeReferencesTo
# “Plugins” are a fancy way of saying gitit will invoke
# GHC at *runtime*, which in turn makes it pull GHC
# into its runtime closure. Only enable if you really need
# that feature. But if you do youll want to use gitit
# as a library anyway.
, pluginSupport ? false
}:
# this is similar to what we do with the pandoc executable
let
plain = haskellPackages.gitit;
plugins =
if pluginSupport
then plain
else haskell.lib.disableCabalFlag plain "plugins";
static = haskell.lib.justStaticExecutables plugins;
in
(haskell.lib.overrideCabal static (drv: {
buildTools = (drv.buildTools or []) ++ [ removeReferencesTo ];
})).overrideAttrs (drv: {
# These libraries are still referenced, because they generate
# a `Paths_*` module for figuring out their version.
# The `Paths_*` module is generated by Cabal, and contains the
# version, but also paths to e.g. the data directories, which
# lead to a transitive runtime dependency on the whole GHC distribution.
# This should ideally be fixed in haskellPackages (or even Cabal),
# but a minimal gitit is important enough to patch it manually.
disallowedReferences = [
haskellPackages.pandoc-types
haskellPackages.HTTP
haskellPackages.pandoc
haskellPackages.happstack-server
haskellPackages.filestore
];
postInstall = ''
remove-references-to \
-t ${haskellPackages.pandoc-types} \
$out/bin/gitit
remove-references-to \
-t ${haskellPackages.HTTP} \
$out/bin/gitit
remove-references-to \
-t ${haskellPackages.pandoc} \
$out/bin/gitit
remove-references-to \
-t ${haskellPackages.happstack-server} \
$out/bin/gitit
remove-references-to \
-t ${haskellPackages.filestore} \
$out/bin/gitit
'';
meta = drv.meta // {
maintainers = drv.meta.maintainers or []
++ [ lib.maintainers.Profpatsch ];
};
})