1 files changed, 77 insertions, 0 deletions
diff --git a/pkgs/development/compilers/ghcjs/wrapper.nix b/pkgs/development/compilers/ghcjs/wrapper.nix
new file mode 100644
index 00000000000..751b7d9a7de
--- /dev/null
+++ b/pkgs/development/compilers/ghcjs/wrapper.nix
@@ -0,0 +1,77 @@
+{ stdenv, ghc, makeWrapper, coreutils, writeScript }:
+let
+  ghcjs = ghc;
+  packageDBFlag = "-package-db";
+
+  GHCGetPackages = writeScript "ghc-get-packages.sh" ''
+    #! ${stdenv.shell}
+    # Usage:
+    #  $1: version of GHC
+    #  $2: invocation path of GHC
+    #  $3: prefix
+    version="$1"
+    if test -z "$3"; then
+      prefix="${packageDBFlag} "
+    else
+      prefix="$3"
+    fi
+    PATH="$PATH:$2"
+    IFS=":"
+    for p in $PATH; do
+      for i in "$p/../share/ghcjs/$system-${ghcjs.version}-${ghcjs.ghc.version}"{,/lib,/ghcjs}"/package.conf.d" "$p/../lib/ghcjs-${ghc.version}_ghc-${ghc.ghc.version}/package.conf.d" ; do
+        # output takes place here
+        test -f $i/package.cache && echo -n " $prefix$i"
+      done
+    done
+  '';
+
+  GHCPackages = writeScript "ghc-packages.sh" ''
+    #! ${stdenv.shell} -e
+    declare -A GHC_PACKAGES_HASH # using bash4 hashs to get uniq paths
+
+    for arg in $(${GHCGetPackages} ${ghcjs.version} "$(dirname $0)"); do # Why is ghc.version passed in from here instead of captured in the other script directly?
+      case "$arg" in
+        ${packageDBFlag}) ;;
+        *)
+          CANONICALIZED="$(${coreutils}/bin/readlink -f -- "$arg")"
+          GHC_PACKAGES_HASH["$CANONICALIZED"]= ;;
+      esac
+    done
+
+    for path in ''${!GHC_PACKAGES_HASH[@]}; do
+      echo -n "$path:"
+    done
+  '';
+in
+stdenv.mkDerivation {
+  name = "ghcjs-ghc${ghcjs.ghc.version}-${ghcjs.version}-wrapper";
+
+  buildInputs = [makeWrapper];
+  propagatedBuildInputs = [ghcjs];
+
+  unpackPhase = "true";
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/bin
+    for prg in ghcjs ; do
+      makeWrapper $ghc/bin/$prg $out/bin/$prg --add-flags "\$(${GHCGetPackages} ${ghcjs.version} \"\$(dirname \$0)\")"
+    done
+    for prg in ghcjs-pkg ; do
+      makeWrapper $ghc/bin/$prg $out/bin/$prg --add-flags "\$(${GHCGetPackages} ${ghcjs.version} \"\$(dirname \$0)\" -${packageDBFlag}=)"
+    done
+
+    mkdir -p $out/nix-support
+    ln -s $out/nix-support/propagated-build-inputs $out/nix-support/propagated-user-env-packages
+
+    mkdir -p $out/share/doc
+    ln -s $ghc/lib $out/lib
+    ln -s $ghc/share/doc/ghc $out/share/doc/ghc-${ghcjs.version}
+
+    runHook postInstall
+  '';
+
+  ghc = ghcjs;
+  inherit GHCGetPackages GHCPackages;
+  inherit (ghcjs) meta version;
+}