petsc.rb

require "formula"

class Petsc < Formula
  homepage "http://www.mcs.anl.gov/petsc/index.html"
  url "http://ftp.mcs.anl.gov/pub/petsc/release-snapshots/petsc-lite-3.5.2.tar.gz"
  sha1 "d60d1735762f2e398774514451e137580bb2c7bb"
  head "https://bitbucket.org/petsc/petsc", :using => :git

  option "without-check", "Skip build-time tests (not recommended)"
  option "complex", "Build complex-valued version of PETSc"

  version ((build.include? "complex") ? "3.5.2-complex" : "3.5.2-real")

  depends_on :mpi => :cc
  depends_on :fortran
  depends_on :x11 => :optional
  depends_on "cmake" => :build

  depends_on "superlu_dist" => :recommended
  depends_on "metis"        => :recommended
  depends_on "parmetis"     => :recommended
  depends_on "scalapack"    => :recommended
  depends_on "mumps"        => :recommended
  depends_on "hypre"        => :recommended unless build.include? "complex"

  def install
    ENV.deparallelize # PETSc compiles are automatically parallel

    petsc_arch = "arch-darwin-c-opt"
    args = %W[
      --with-debugging=0
      --with-shared-libraries=1
      --prefix=#{prefix}/#{petsc_arch}
    ]

    args << "--with-superlu_dist-include=#{Formula["superlu_dist"].include}/superlu_dist" << "--with-superlu_dist-lib=#{Formula["superlu_dist"].lib}/libsuperlu_dist.a" if build.with? "superlu_dist"
    args << "--with-metis-dir=#{Formula["metis"].prefix}" if build.with? "metis"
    args << "--with-parmetis-dir=#{Formula["parmetis"].prefix}" if build.with? "parmetis"
    args << "--with-scalapack-dir=#{Formula["scalapack"].prefix}" if build.with? "scalapack"
    args << "--with-mumps-dir=#{Formula["mumps"].prefix}" if build.with? "mumps"
    args << "--with-scalar-type=" + ((build.with? "complex") ? "complex" : "real")
    args << "--with-x=0" if build.without? "x11"

    ENV["PETSC_DIR"] = Dir.getwd  # configure fails if those vars are set differently.
    ENV["PETSC_ARCH"] = petsc_arch
    system "./configure", *args
    system "make all"
    system "make test" if build.with? "check"
    system "make install"

    # Link only what we want.
    include.install_symlink Dir["#{prefix}/#{petsc_arch}/include/*h"], "#{prefix}/#{petsc_arch}/include/finclude", "#{prefix}/#{petsc_arch}/include/petsc-private"
    prefix.install_symlink "#{prefix}/#{petsc_arch}/conf"
    lib.install_symlink Dir["#{prefix}/#{petsc_arch}/lib/*.a"], Dir["#{prefix}/#{petsc_arch}/lib/*.dylib"]
    share.install_symlink Dir["#{prefix}/#{petsc_arch}/share/*"]
  end

  def caveats; <<-EOS
    Set PETSC_DIR to #{prefix}
    and PETSC_ARCH to arch-darwin-c-opt.
    Fortran module files are in #{prefix}/arch-darwin-c-opt/include.
    EOS
  end
end