From ac43be430a1b88141d4555fc71a9a621991bf758 Mon Sep 17 00:00:00 2001
From: Tyson Whitehead <twhitehead@gmail.com>
Date: Fri, 7 Oct 2016 15:38:44 -0400
Subject: [PATCH 1/4] openfoam: Initial packaging

---
 openfoam.nix | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 openfoam.nix

diff --git a/openfoam.nix b/openfoam.nix
new file mode 100644
index 0000000..d465a11
--- /dev/null
+++ b/openfoam.nix
@@ -0,0 +1,77 @@
+with import <nixpkgs> {};
+
+stdenv.mkDerivation rec {
+  version = "4.0";
+  name = "openfoam-${version}";
+
+  src = fetchurl {
+     url = "https://github.com/OpenFOAM/OpenFOAM-4.x/archive/version-${version}.tar.gz";
+     sha256 = "0mslymq1szprzlp18j92zl30zfz9bj9r4psxa6ys99qw0ff85vx8";
+  };
+
+  # a lot of assumptions about being under a directory named OpenFOAM-${version}
+  postUnpack = ''
+    echo "resettting sourceRoot to ''${sourceRoot/-4.x-version/}"
+    mv "$sourceRoot" "''${sourceRoot/-4.x-version/}"
+    sourceRoot="''${sourceRoot/-4.x-version/}"
+  '';
+
+  # one of the following would bake in the rpath, but sourcing etc/bashrc file updates LD_LIBRARY_PATH
+  # NIX_LDFLAGS="-rpath $out/platform/$WM_OPTIONS/lib $NIX_LDFLAGS"
+  # NIX_LDFLAGS="${NIX_LDFLAGS/"$out/lib$WM_ARCH_OPTION"/"$out/platform/$WM_OPTIONS/lib"}"
+  configurePhase = ''
+    sed -ie 's|FOAM_INST_DIR=$HOME/$WM_PROJECT.*|FOAM_INST_DIR='"$out"/lib/OpenFOAM-${version}'|' etc/bashrc
+    sed -ie 's|BOOST_ARCH_PATH=.*$|BOOST_ARCH_PATH=${boost}|' etc/config.sh/CGAL
+    sed -ie 's|CGAL_ARCH_PATH=.*$|CGAL_ARCH_PATH=${cgal}|' etc/config.sh/CGAL
+    sed -ie 's|METIS_ARCH_PATH=.*$|METIS_ARCH_PATH=${metis}|' etc/config.sh/metis
+    sed -ie 's|SCOTCH_ARCH_PATH=.*$|SCOTCH_ARCH_PATH=${scotch}|' etc/config.sh/scotch
+    source "$PWD/etc/bashrc"
+  '';
+
+  buildPhase = ''
+    export WM_NCOMPPROCS="''${NIX_BUILD_CORES}"
+    ./Allwmake
+  '';
+
+  # stick etc, bin, applications, and platforms under lib/OpenFOAM-${version}
+  # fill bin proper up with wrappers to everything in platform/$WM_OPTIONS/bin that source etc/bashrc
+  installPhase = ''
+    echo "copying etc, bin, applications, and platforms directories to $out/lib/OpenFOAM-${version}"
+    mkdir -p "$out/lib/OpenFOAM-${version}"
+    cp -at "$out/lib/OpenFOAM-${version}" etc bin applications platforms
+    echo "creating a bin of wrapped binaries from $out/lib/OpenFOAM-${version}/platforms/$WM_OPTIONS/bin"
+    for program in "$out/lib/OpenFOAM-${version}/platforms/$WM_OPTIONS/bin/"*; do
+      makeWrapper "$program" "$out/bin/''${program##*/}" \
+        --run "source \"$out/lib/OpenFOAM-${version}/etc/bashrc\""
+    done
+  '';
+
+  buildInputs = [
+    makeWrapper
+    flex
+    bison
+    zlib
+    boost
+    openmpi
+#    gnuplot
+    readline
+#    ncurses
+    gperftools
+    cgal
+    metis
+    scotch
+    mpfr
+#    xorg.libXt
+#    paraview
+#    cmake
+#    qt4
+#    freeglut
+  ];
+
+  meta = with stdenv.lib; {
+    homepage = http://www.openfoam.com;
+    description = "Free open-source CFD software";
+    platforms = platforms.linux;
+    license = licenses.gpl3;
+  };
+}

From 96cd6a502e21529392d73d5fc2cade17278ca8f2 Mon Sep 17 00:00:00 2001
From: Tyson Whitehead <twhitehead@gmail.com>
Date: Fri, 7 Oct 2016 16:48:29 -0400
Subject: [PATCH 2/4] openfoam: Drop unused buildInputs

---
 openfoam.nix | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/openfoam.nix b/openfoam.nix
index d465a11..9eeb2e4 100644
--- a/openfoam.nix
+++ b/openfoam.nix
@@ -53,19 +53,12 @@ stdenv.mkDerivation rec {
     zlib
     boost
     openmpi
-#    gnuplot
     readline
-#    ncurses
     gperftools
     cgal
     metis
     scotch
     mpfr
-#    xorg.libXt
-#    paraview
-#    cmake
-#    qt4
-#    freeglut
   ];
 
   meta = with stdenv.lib; {

From 7a6534cb21a437543cb5cee70165aa575f0ce00a Mon Sep 17 00:00:00 2001
From: Tyson Whitehead <twhitehead@gmail.com>
Date: Fri, 7 Oct 2016 16:49:01 -0400
Subject: [PATCH 3/4] openfoam: Don't package applications directory (it's
 source)

---
 openfoam.nix | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/openfoam.nix b/openfoam.nix
index 9eeb2e4..f54b763 100644
--- a/openfoam.nix
+++ b/openfoam.nix
@@ -33,12 +33,12 @@ stdenv.mkDerivation rec {
     ./Allwmake
   '';
 
-  # stick etc, bin, applications, and platforms under lib/OpenFOAM-${version}
+  # stick etc, bin, and platforms under lib/OpenFOAM-${version}
   # fill bin proper up with wrappers to everything in platform/$WM_OPTIONS/bin that source etc/bashrc
   installPhase = ''
-    echo "copying etc, bin, applications, and platforms directories to $out/lib/OpenFOAM-${version}"
+    echo "copying etc, bin, and platforms directories to $out/lib/OpenFOAM-${version}"
     mkdir -p "$out/lib/OpenFOAM-${version}"
-    cp -at "$out/lib/OpenFOAM-${version}" etc bin applications platforms
+    cp -at "$out/lib/OpenFOAM-${version}" etc bin platforms
     echo "creating a bin of wrapped binaries from $out/lib/OpenFOAM-${version}/platforms/$WM_OPTIONS/bin"
     for program in "$out/lib/OpenFOAM-${version}/platforms/$WM_OPTIONS/bin/"*; do
       makeWrapper "$program" "$out/bin/''${program##*/}" \

From a90c9e5ee3706c3c6c81abe80a70e0a6956e8eef Mon Sep 17 00:00:00 2001
From: Tyson Whitehead <twhitehead@gmail.com>
Date: Thu, 27 Oct 2016 10:57:04 -0400
Subject: [PATCH 4/4] openfoam: Add *-mpi wrappers for all bins that use
 libPstream.so

* Ensure correct mpirun is used and right number of processes
---
 openfoam.nix | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/openfoam.nix b/openfoam.nix
index f54b763..9104495 100644
--- a/openfoam.nix
+++ b/openfoam.nix
@@ -34,7 +34,8 @@ stdenv.mkDerivation rec {
   '';
 
   # stick etc, bin, and platforms under lib/OpenFOAM-${version}
-  # fill bin proper up with wrappers to everything in platform/$WM_OPTIONS/bin that source etc/bashrc
+  # fill bin proper up with wrappers that source etc/bashrc for everything in platform/$WM_OPTIONS/bin
+  # add -mpi suffixed versions that calls proper mpirun for those with libPstream.so depencies too
   installPhase = ''
     echo "copying etc, bin, and platforms directories to $out/lib/OpenFOAM-${version}"
     mkdir -p "$out/lib/OpenFOAM-${version}"
@@ -43,6 +44,12 @@ stdenv.mkDerivation rec {
     for program in "$out/lib/OpenFOAM-${version}/platforms/$WM_OPTIONS/bin/"*; do
       makeWrapper "$program" "$out/bin/''${program##*/}" \
         --run "source \"$out/lib/OpenFOAM-${version}/etc/bashrc\""
+      if readelf -d "$program" | fgrep -q libPstream.so; then
+        makeWrapper "${openmpi}/bin/mpirun" "$out/bin/''${program##*/}-mpi" \
+          --run "[ -r processor0 ] || { echo \"Case is not currently decomposed, see decomposePar documentation\"; exit 1; }" \
+          --run "extraFlagsArray+=(-n \"\$(ls -d processor* | wc -l)\" \"$out/bin/''${program##*/}\" -parallel)" \
+          --run "source \"$out/lib/OpenFOAM-${version}/etc/bashrc\""
+      fi
     done
   '';