nlopt: migrate from homebrew/science

Closes Homebrew#17050.

Signed-off-by: FX Coudert <[email protected]>

Author: fxcoudert

Formula/nlopt.rb

@@ -0,0 +1,85 @@
+class Nlopt < Formula
+  desc "Free/open-source library for nonlinear optimization"
+  homepage "http://ab-initio.mit.edu/nlopt"
+  url "http://ab-initio.mit.edu/nlopt/nlopt-2.4.2.tar.gz"
+  sha256 "8099633de9d71cbc06cd435da993eb424bbcdbded8f803cdaa9fb8c6e09c8e89"
+  revision 2
+
+  head do
+    url "https://github.com/stevengj/nlopt.git"
+    depends_on "cmake" => :build
+    depends_on "swig" => :build
+  end
+
+  depends_on "numpy"
+
+  def install
+    ENV.deparallelize
+
+    if build.head?
+      system "cmake", ".", *std_cmake_args,
+                      "-DBUILD_MATLAB=OFF",
+                      "-DBUILD_OCTAVE=OFF",
+                      "-DWITH_CXX=ON"
+    else
+      system "./configure", "--prefix=#{prefix}",
+                            "--enable-shared",
+                            "--with-cxx",
+                            "--without-octave"
+      system "make"
+    end
+    system "make", "install"
+
+    # Create library links for C programs
+    %w[0.dylib dylib a].each do |suffix|
+      lib.install_symlink "#{lib}/libnlopt_cxx.#{suffix}" => "#{lib}/libnlopt.#{suffix}"
+    end
+  end
+
+  test do
+    # Based on http://ab-initio.mit.edu/wiki/index.php/NLopt_Tutorial#Example_in_C.2FC.2B.2B
+    (testpath/"test.c").write <<-EOS.undent
+    #include <math.h>
+    #include <nlopt.h>
+    #include <stdio.h>
+    double myfunc(unsigned n, const double *x, double *grad, void *my_func_data) {
+      if (grad) {
+        grad[0] = 0.0;
+        grad[1] = 0.5 / sqrt(x[1]);
+      }
+      return sqrt(x[1]);
+    }
+    typedef struct { double a, b; } my_constraint_data;
+    double myconstraint(unsigned n, const double *x, double *grad, void *data) {
+      my_constraint_data *d = (my_constraint_data *) data;
+      double a = d->a, b = d->b;
+      if (grad) {
+        grad[0] = 3 * a * (a*x[0] + b) * (a*x[0] + b);
+        grad[1] = -1.0;
+      }
+      return ((a*x[0] + b) * (a*x[0] + b) * (a*x[0] + b) - x[1]);
+     }
+     int main() {
+      double lb[2] = { -HUGE_VAL, 0 }; /* lower bounds */
+      nlopt_opt opt;
+      opt = nlopt_create(NLOPT_LD_MMA, 2); /* algorithm and dimensionality */
+      nlopt_set_lower_bounds(opt, lb);
+      nlopt_set_min_objective(opt, myfunc, NULL);
+      my_constraint_data data[2] = { {2,0}, {-1,1} };
+      nlopt_add_inequality_constraint(opt, myconstraint, &data[0], 1e-8);
+      nlopt_add_inequality_constraint(opt, myconstraint, &data[1], 1e-8);
+      nlopt_set_xtol_rel(opt, 1e-4);
+      double x[2] = { 1.234, 5.678 };  /* some initial guess */
+      double minf; /* the minimum objective value, upon return */
+
+      if (nlopt_optimize(opt, x, &minf) < 0)
+        return 1;
+      else
+        printf("found minimum at f(%g,%g) = %0.10g", x[0], x[1], minf);
+      nlopt_destroy(opt);
+    }
+    EOS
+    system ENV.cc, "test.c", "-o", "test", "-lnlopt", "-lm"
+    assert_match "found minimum", shell_output("./test")
+  end
+end

tap_migrations.json

@@ -36,7 +36,6 @@
   "meld": "caskroom/cask",
   "n98-magerun": "homebrew/php",
   "newick-utils": "homebrew/science",
-  "nlopt": "homebrew/science",
   "openfst": "homebrew/science",
   "opengrm-ngram": "homebrew/science",
   "osxfuse": "caskroom/cask",