require 'formula'

class Gdal < Formula
  homepage 'http://www.gdal.org/'
  url 'http://download.osgeo.org/gdal/1.10.1/gdal-1.10.1.tar.gz'
  sha1 'b4df76e2c0854625d2bedce70cc1eaf4205594ae'

  head do
    url 'https://svn.osgeo.org/gdal/trunk/gdal'
    depends_on 'doxygen' => :build
  end

  option 'complete', 'Use additional Homebrew libraries to provide more drivers.'
  option 'with-postgres', 'Specify PostgreSQL as a dependency.'
  option 'with-mysql', 'Specify MySQL as a dependency.'
  option 'enable-opencl', 'Build with OpenCL acceleration.'
  option 'enable-armadillo', 'Build with Armadillo accelerated TPS transforms.'
  option 'enable-unsupported', "Allow configure to drag in any library it can find. Invoke this at your own risk."

  depends_on :python => :recommended
  depends_on :libpng
  depends_on 'jpeg'
  depends_on 'giflib'
  depends_on 'libtiff'
  depends_on 'libgeotiff'
  depends_on 'proj'
  depends_on 'geos'

  depends_on 'sqlite' # To ensure compatibility with SpatiaLite.
  depends_on 'freexl'
  depends_on 'libspatialite'

  depends_on "postgresql" => :optional
  depends_on "mysql" => :optional

  # Without Numpy, the Python bindings can't deal with raster data.
  depends_on 'numpy' => :python if build.with? 'python'

  depends_on 'homebrew/science/armadillo' if build.include? 'enable-armadillo'

  if build.include? 'complete'
    # Raster libraries
    depends_on "homebrew/science/netcdf" # Also brings in HDF5
    depends_on "jasper"
    depends_on "webp"
    depends_on "cfitsio"
    depends_on "epsilon"
    depends_on "libdap"

    # Vector libraries
    depends_on "unixodbc" # OS X version is not complete enough
    depends_on "xerces-c"

    # Other libraries
    depends_on "xz" # get liblzma compression algorithm library from XZutils
    depends_on "poppler"
  end

  def png_prefix
    MacOS.version >= :mountain_lion ? HOMEBREW_PREFIX/"opt/libpng" : MacOS::X11.prefix
  end

  def get_configure_args
    args = [
      # Base configuration.
      "--prefix=#{prefix}",
      "--mandir=#{man}",
      "--disable-debug",
      "--with-local=#{prefix}",
      "--with-threads",
      "--with-libtool",

      # GDAL native backends.
      "--with-pcraster=internal",
      "--with-pcidsk=internal",
      "--with-bsb",
      "--with-grib",
      "--with-pam",

      # Backends supported by OS X.
      "--with-libiconv-prefix=/usr",
      "--with-libz=/usr",
      "--with-png=#{png_prefix}",
      "--with-expat=/usr",
      "--with-curl=/usr/bin/curl-config",

      # Default Homebrew backends.
      "--with-jpeg=#{HOMEBREW_PREFIX}",
      "--without-jpeg12", # Needs specially configured JPEG and TIFF libraries.
      "--with-gif=#{HOMEBREW_PREFIX}",
      "--with-libtiff=#{HOMEBREW_PREFIX}",
      "--with-geotiff=#{HOMEBREW_PREFIX}",
      "--with-sqlite3=#{Formula.factory('sqlite').opt_prefix}",
      "--with-freexl=#{HOMEBREW_PREFIX}",
      "--with-spatialite=#{HOMEBREW_PREFIX}",
      "--with-geos=#{HOMEBREW_PREFIX}/bin/geos-config",
      "--with-static-proj4=#{HOMEBREW_PREFIX}",

      # GRASS backend explicitly disabled.  Creates a chicken-and-egg problem.
      # Should be installed separately after GRASS installation using the
      # official GDAL GRASS plugin.
      "--without-grass",
      "--without-libgrass"
    ]

    # Optional Homebrew packages supporting additional formats.
    supported_backends = %w[
      liblzma
      cfitsio
      hdf5
      netcdf
      jasper
      xerces
      odbc
      dods-root
      epsilon
      webp
      poppler
    ]
    if build.include? 'complete'
      supported_backends.delete 'liblzma'
      args << '--with-liblzma=yes'
      args.concat supported_backends.map {|b| '--with-' + b + '=' + HOMEBREW_PREFIX}
    else
      args.concat supported_backends.map {|b| '--without-' + b} unless build.include? 'enable-unsupported'
    end

    # The following libraries are either proprietary, not available for public
    # download or have no stable version in the Homebrew core that is
    # compatible with GDAL. Interested users will have to install such software
    # manually and most likely have to tweak the install routine.
    #
    # Podofo is disabled because Poppler provides the same functionality and
    # then some.
    unsupported_backends = %w[
      gta
      ogdi
      fme
      hdf4
      openjpeg
      fgdb
      ecw
      kakadu
      mrsid
      jp2mrsid
      mrsid_lidar
      msg
      oci
      ingres
      libkml
      dwgdirect
      idb
      sde
      podofo
      rasdaman
    ]
    args.concat unsupported_backends.map {|b| '--without-' + b} unless build.include? 'enable-unsupported'

    # Database support.
    args << (build.with?("postgres") ? "--with-pg=#{HOMEBREW_PREFIX}/bin/pg_config" : "--without-pg")
    args << (build.with?("mysql") ? "--with-mysql=#{HOMEBREW_PREFIX}/bin/mysql_config" : "--without-mysql")

    # Python is installed manually to ensure everything is properly sandboxed.
    args << '--without-python'

    # Scripting APIs that have not been re-worked to respect Homebrew prefixes.
    #
    # Currently disabled as they install willy-nilly into locations outside of
    # the Homebrew prefix.  Enable if you feel like it, but uninstallation may be
    # a manual affair.
    #
    # TODO: Fix installation of script bindings so they install into the
    # Homebrew prefix.
    args << "--without-perl"
    args << "--without-php"
    args << "--without-ruby"

    args << (build.include?("enable-opencl") ? "--with-opencl" : "--without-opencl")
    args << (build.include?("enable-armadillo") ? "--with-armadillo=yes" : "--with-armadillo=no")

    return args
  end

  def patches
    # Prevent build failure on 10.6 / 10.7
    # TODO: Remove when 1.10.2 releases
    # http://trac.osgeo.org/gdal/ticket/5197
    DATA
  end

  def install
    # Linking flags for SQLite are not added at a critical moment when the GDAL
    # library is being assembled. This causes the build to fail due to missing
    # symbols. Also, ensure Homebrew SQLite is used so that Spatialite is
    # functional.
    #
    # Fortunately, this can be remedied using LDFLAGS.
    sqlite = Formula.factory 'sqlite'
    ENV.append 'LDFLAGS', "-L#{sqlite.opt_prefix}/lib -lsqlite3"
    ENV.append 'CFLAGS', "-I#{sqlite.opt_prefix}/include"
    # Needed by libdap.
    ENV.libxml2 if build.include? 'complete'

    # Reset ARCHFLAGS to match how we build.
    ENV['ARCHFLAGS'] = "-arch #{MacOS.preferred_arch}"

    # Fix hardcoded mandir: http://trac.osgeo.org/gdal/ticket/5092
    inreplace 'configure', %r[^mandir='\$\{prefix\}/man'$], ''

    system "./configure", *get_configure_args
    system "make"
    system "make install"

    python do
      # `python-config` may try to talk us into building bindings for more
      # architectures than we really should.
      if MacOS.prefer_64_bit?
        ENV.append_to_cflags "-arch #{Hardware::CPU.arch_64_bit}"
      else
        ENV.append_to_cflags "-arch #{Hardware::CPU.arch_32_bit}"
      end

      cd 'swig/python' do
        system python, "setup.py", "install", "--prefix=#{prefix}", "--record=installed.txt", "--single-version-externally-managed"
        bin.install Dir['scripts/*']
      end
    end

    system 'make', 'man' if build.head?
    system 'make', 'install-man'
    # Clean up any stray doxygen files.
    Dir[bin + '*.dox'].each { |p| rm p }
  end

  def caveats
    if python
      python.standard_caveats +
      <<-EOS.undent
        This version of GDAL was built with Python support. In addition to providing
        modules that makes GDAL functions available to Python scripts, the Python
        binding provides additional command line tools.
      EOS
    end
  end
end

__END__
diff --git a/port/cpl_spawn.cpp b/port/cpl_spawn.cpp
index d702594..69ea3c2 100644
--- a/port/cpl_spawn.cpp
+++ b/port/cpl_spawn.cpp
@@ -464,7 +464,7 @@ void CPLSpawnAsyncCloseErrorFileHandle(CPLSpawnedProcess* p)
     #ifdef __APPLE__
         #include <TargetConditionals.h>
     #endif
-    #if defined(__APPLE__) && !defined(TARGET_OS_IPHONE)
+    #if defined(__APPLE__) && (!defined(TARGET_OS_IPHONE) || TARGET_OS_IPHONE==0)
         #include <crt_externs.h>
         #define environ (*_NSGetEnviron())
     #else