1 files changed, 36 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/compilers/elm/lib/makeDotElm.nix b/nixpkgs/pkgs/development/compilers/elm/lib/makeDotElm.nix
new file mode 100644
index 000000000000..ab62eb88e220
--- /dev/null
+++ b/nixpkgs/pkgs/development/compilers/elm/lib/makeDotElm.nix
@@ -0,0 +1,36 @@
+{ stdenv, lib, fetchurl, registryDat }:
+
+ver: deps:
+let
+  cmds = lib.mapAttrsToList
+    (name: info:
+      let
+        pkg = stdenv.mkDerivation {
+          name = lib.replaceStrings [ "/" ] [ "-" ] name + "-${info.version}";
+
+          src = fetchurl {
+            url = "https://github.com/${name}/archive/${info.version}.tar.gz";
+            meta.homepage = "https://github.com/${name}/";
+            inherit (info) sha256;
+          };
+
+          dontConfigure = true;
+          dontBuild = true;
+
+          installPhase = ''
+            mkdir -p $out
+            cp -r * $out
+          '';
+        };
+      in
+      ''
+        mkdir -p .elm/${ver}/packages/${name}
+        cp -R ${pkg} .elm/${ver}/packages/${name}/${info.version}
+      '')
+    deps;
+in
+(lib.concatStrings cmds) + ''
+  mkdir -p .elm/${ver}/packages;
+  cp ${registryDat} .elm/${ver}/packages/registry.dat;
+  chmod -R +w .elm
+''