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{ stdenv, makeWrapper, ihaskell, ipython, ghc }:
stdenv.mkDerivation rec {
inherit (ihaskell) name pname src version meta;
buildInputs = [ makeWrapper ];
preferLocalBuild = true;
buildCommand = let profile = "${pname}-${version}/profile/profile.tar"; in ''
tar xf $src ${profile}
mkdir -p $out/share/`dirname ${profile}`
mkdir profile
cd profile
tar xf ../${profile}
for cfg in ipython_*config.py;do
sed -i -e "1iexe = '${ihaskell}/bin/IHaskell'" $cfg
done
tar cf $out/share/${profile} .
makeWrapper "${ihaskell}/bin/IHaskell" "$out/bin/ihaskell" \
--prefix PATH : "${ghc}/bin:${ihaskell}/bin:${ipython}/bin" \
--prefix LD_LIBRARY_PATH : "${ihaskell}/lib/ghc-${ghc.version}/${name}/" \
--add-flags "--ipython=${ipython}/bin/ipython" \
--set PROFILE_DIR "\$HOME/.ipython/profile_haskell" \
--set PROFILE_TAR "$out/share/${profile}" \
--set PROFILE_INIT "\$([ ! -d \$PROFILE_DIR ] \
&& mkdir -p \$PROFILE_DIR \
&& tar xf \$PROFILE_TAR -C \$PROFILE_DIR \
; [ -d \$PROFILE_DIR ] && for cfg in \$PROFILE_DIR/ipython_*config.py;do \
sed -i -e '/.*exe.*IHaskell.*/d' \$cfg; sed -i -e \"1iexe = '${ihaskell}/bin/IHaskell'\" \$cfg;done ) \
" \
--prefix GHC_PACKAGE_PATH : "\$(${ghc.GHCGetPackages} ${ghc.version}|sed -e 's, -package-db ,:,g'|cut -b 2-):${ihaskell}/lib/ghc-${ghc.version}/package.conf.d/${pname}-${version}.installedconf" \
--set GHC_PACKAGE_PATH "\$GHC_PACKAGE_PATH:" # always end with : to include base packages
'';
}
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