From 10981178a966f0d8bfc77a680921d85e5497e453 Mon Sep 17 00:00:00 2001
From: Boris Sukholitko <boriss@gmail.com>
Date: Sat, 12 Jul 2014 18:17:50 +0300
Subject: [PATCH] Add emscripten: LLVM to JavaScript compiler

---
 .../compilers/emscripten-fastcomp/default.nix | 42 +++++++++++++++++++
 .../compilers/emscripten/default.nix          | 40 ++++++++++++++++++
 pkgs/top-level/all-packages.nix               |  4 ++
 3 files changed, 86 insertions(+)
 create mode 100644 pkgs/development/compilers/emscripten-fastcomp/default.nix
 create mode 100644 pkgs/development/compilers/emscripten/default.nix

diff --git a/pkgs/development/compilers/emscripten-fastcomp/default.nix b/pkgs/development/compilers/emscripten-fastcomp/default.nix
new file mode 100644
index 000000000000..3eb9aef528c0
--- /dev/null
+++ b/pkgs/development/compilers/emscripten-fastcomp/default.nix
@@ -0,0 +1,42 @@
+{ stdenv, fetchgit, python }:
+
+let
+  tag = "1.21.0";
+in
+
+stdenv.mkDerivation rec {
+  name = "emscripten-fastcomp-${tag}";
+
+  srcFC = fetchgit {
+    url = git://github.com/kripken/emscripten-fastcomp;
+    rev = "refs/tags/${tag}";
+    sha256 = "0mcxzg2cfg0s1vfm3bh1ar4xsddb6xkv1dsdbgnpx38lbj1mvfs1";
+  };
+
+  srcFL = fetchgit {
+    url = git://github.com/kripken/emscripten-fastcomp-clang;
+    rev = "refs/tags/${tag}";
+    sha256 = "0s2jcn36d236cfpryjpgaazjp3cg83d0h78g6kk1j6vdppv3vgnp";
+  };
+
+  buildInputs = [ python ];
+  buildCommand = ''
+    cp -as ${srcFC} $TMPDIR/src
+    chmod +w $TMPDIR/src/tools
+    cp -as ${srcFL} $TMPDIR/src/tools/clang
+
+    chmod +w $TMPDIR/src
+    mkdir $TMPDIR/src/build
+    cd $TMPDIR/src/build
+
+    ../configure --enable-optimized --disable-assertions --enable-targets=host,js
+    make
+    cp -a Release/bin $out
+  '';
+  meta = with stdenv.lib; {
+    homepage = https://github.com/kripken/emscripten-fastcomp;
+    description = "emscripten llvm";
+    maintainers = with maintainers; [ bosu ];
+    license = "University of Illinois/NCSA Open Source License";
+  };
+}
diff --git a/pkgs/development/compilers/emscripten/default.nix b/pkgs/development/compilers/emscripten/default.nix
new file mode 100644
index 000000000000..dc81b90b4b90
--- /dev/null
+++ b/pkgs/development/compilers/emscripten/default.nix
@@ -0,0 +1,40 @@
+{ stdenv, fetchgit, emscriptenfastcomp, python, nodejs, closurecompiler, jre }:
+
+let
+  tag = "1.21.0";
+in
+
+stdenv.mkDerivation rec {
+  name = "emscripten-${tag}";
+
+  src = fetchgit {
+    url = git://github.com/kripken/emscripten;
+    rev = "refs/tags/${tag}";
+    sha256 = "0y17ab4nhd3521b50sv2i2667w0rlcnmlkpkgw5j3fsh8awxgf32";
+  };
+
+  buildCommand = ''
+    mkdir $out
+    cp -a $src $out/bin
+    chmod -R +w $out/bin
+    grep -rl '^#!/usr.*python' $out/bin | xargs sed -i -s 's@^#!/usr.*python.*@#!${python}/bin/python@'
+    sed -i -e "s,EM_CONFIG = '~/.emscripten',EM_CONFIG = '$out/config'," $out/bin/tools/shared.py
+    sed -i -e 's,^.*did not see a source tree above the LLVM.*$,      return True,' $out/bin/tools/shared.py
+    sed -i -e 's,def check_sanity(force=False):,def check_sanity(force=False):\n  return,' $out/bin/tools/shared.py
+
+    echo "EMSCRIPTEN_ROOT = '$out/bin'" > $out/config
+    echo "LLVM_ROOT = '${emscriptenfastcomp}'" >> $out/config
+    echo "PYTHON = '${python}/bin/python'" >> $out/config
+    echo "NODE_JS = '${nodejs}/bin/node'" >> $out/config
+    echo "JS_ENGINES = [NODE_JS]" >> $out/config
+    echo "COMPILER_ENGINE = NODE_JS" >> $out/config
+    echo "CLOSURE_COMPILER = '${closurecompiler}/bin/closure-compiler'" >> $out/config
+    echo "JAVA = '${jre}/bin/java'" >> $out/config
+  '';
+  meta = with stdenv.lib; {
+    homepage = https://github.com/kripken/emscripten;
+    description = "An LLVM-to-JavaScript Compiler";
+    maintainers = with maintainers; [ bosu ];
+    license = "MIT and University of Illinois/NCSA Open Source License";
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 450b28bd85e5..a8cf37220086 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -957,6 +957,10 @@ let
 
   edk2 = callPackage ../development/compilers/edk2 { };
 
+  emscripten = callPackage ../development/compilers/emscripten { };
+
+  emscriptenfastcomp = callPackage ../development/compilers/emscripten-fastcomp { };
+
   efibootmgr = callPackage ../tools/system/efibootmgr { };
 
   elasticsearch = callPackage ../servers/search/elasticsearch { };