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haskell: don't error if isLibrary = true and no libraries exist

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If empty directory isn't deleted, referer depenedencies will
fail with:

cp: missing destination file operand after '/tmp/nix-build-cabal-helper-0.8.0.2.drv-0/setup-package.conf.d/'

This is currently only the case for cabal-install, as cabal2nix
doesn't handle well buildable=False flags due to long-standing bugs
in Cabal itself.
This commit is contained in:
Domen Kožar 2018-07-16 17:23:32 +02:00 committed by Peter Simons
parent b3af2cd962
commit 6fd5287c36
1 changed files with 3 additions and 0 deletions
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3
pkgs/development/haskell-modules/generic-builder.nix
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@ -394,6 +394,9 @@ stdenv.mkDerivation ({
local pkgId=$( ${gnused}/bin/sed -n -e 's|^id: ||p' $packageConfFile ) local pkgId=$( ${gnused}/bin/sed -n -e 's|^id: ||p' $packageConfFile )
mv $packageConfFile $packageConfDir/$pkgId.conf mv $packageConfFile $packageConfDir/$pkgId.conf
done done
# delete confdir if there are no libraries
find $packageConfDir -maxdepth 0 -empty -delete;
''} ''}
${optionalString isGhcjs '' ${optionalString isGhcjs ''
for exeDir in "$out/bin/"*.jsexe; do for exeDir in "$out/bin/"*.jsexe; do