Update to pdal v0.6

PDAL development continues to evolve. This is updates the formula
from v0.1 to v0.6. Adds many options and their associated dependencies,
e.g., GDAL.

Updated based on feedback from pull request.

Use or clause for dependencies triggered with multiple flags. Transitioned to
'mkdir' block. Temporarily removed support for GDAL and libgeotiff, which must
be built from trunk of their repos, and added a caveat to explain the situation
for users who require them.

Library/Formula/pdal.rb

@@ -2,14 +2,115 @@
 
 class Pdal < Formula
   homepage 'http://pointcloud.org'
-  url 'https://github.com/PDAL/PDAL/zipball/0.1.0'
-  md5 'fd5766b2da2337971cbf0e465dc5bd50'
+  url 'https://github.com/PDAL/PDAL/zipball/0.6.0'
+  md5 'e21c2227a9302f033f8ecf513baedf51'
+
+  def options
+  [
+    ['--embed-boost', 'Use embedded Boost?'],
+#    ['--with-gdal', 'Use GDAL?'],
+#    ['--with-geotiff', 'Use GeoTIFF?'],
+    ['--with-iconv', 'Use ICONV?'],
+    ['--with-laszip', 'Use LASZIP?'],
+    ['--with-libxml2', 'Use libXML2?'],
+    ['--with-mrsid', 'Use MRSID?'],
+    ['--with-oracle', 'Use Oracle?'],
+    ['--with-p2g', 'Use P2G?'],
+    ['--with-pkgconfig', 'Use PkgConfig?'],
+    ['--with-python', 'Use Python?'],
+    ['--with-swig-csharp', 'Use SWIG C#?'],
+    ['--with-swig-python', 'Use SWIG Python?'],
+    ['--with-tests', 'Use tests?']
+  ]
+  end
 
   depends_on 'cmake' => :build
-  depends_on 'boost'
+  depends_on 'boost' unless ARGV.include? '--embed-boost'
+
+#  depends_on 'libgeotiff' if ARGV.include? '--with-geotiff' || '--with-gdal'
+#  depends_on 'gdal' if ARGV.include? '--with-gdal'
+  depends_on 'iconv' if ARGV.include? '--with-iconv'
+  depends_on 'laszip' if ARGV.include? '--with-laszip'
+  depends_on 'libxml2' if ARGV.include? '--with-libxml2'
+  depends_on 'mrsid' if ARGV.include? '--with-mrsid'
+  depends_on 'oracle' if ARGV.include? '--with-oracle'
+  depends_on 'p2k' if ARGV.include? '--with-p2g'
+  depends_on 'pkgconfig' if ARGV.include? '--with-pkgconfig'
+  depends_on 'python' if ARGV.include? '--with-python'
+  depends_on 'swig' if ARGV.include? '--with-swig-csharp' || '--with-swig-python'
 
   def install
-    system "cmake #{std_cmake_parameters} ."
-    system "make install"
+    args = std_cmake_parameters.split
+
+    if ARGV.include? '--with-gdal'
+      args << "-DWITH_GDAL:BOOL=ON"
+    end
+
+    if ARGV.include? '--with-geotiff'
+      args << "-DWITH_GEOTIFF:BOOL=ON"
+    end
+
+    if ARGV.include? '--with-iconv'
+      args << "-DWITH_ICONV:BOOL=ON"
+    end
+
+    if ARGV.include? '--with-laszip'
+      args << "-DWITH_LASZIP:BOOL=ON"
+    end
+
+    if ARGV.include? '--with-libxml2'
+      args << "-DWITH_LIBXML2:BOOL=ON"
+    end
+
+    if ARGV.include? '--with-mrsid'
+      args << "-DWITH_MRSID:BOOL=ON"
+    end
+
+    if ARGV.include? '--with-oracle'
+      args << "-DWITH_ORACLE:BOOL=ON"
+    end
+
+    if ARGV.include? '--with-p2g'
+      args << "-DWITH_P2G:BOOL=ON"
+    end
+
+    if ARGV.include? '--with-pkgconfig'
+      args << "-DWITH_PKGCONFIG:BOOL=ON"
+    end
+
+    if ARGV.include? '--with-python'
+      args << "-DWITH_PYTHON:BOOL=ON"
+    end
+
+    if ARGV.include? '--with-swig-csharp'
+      args << "-DWITH_SWIG_CSHARP:BOOL=ON"
+    end
+
+    if ARGV.include? '--with-swig-python'
+      args << "-DWITH_SWIG_PYTHON:BOOL=ON"
+    end
+
+    if ARGV.include? '--with-tests'
+      args << "-DWITH_TESTS:BOOL=ON"
+    end
+
+#    system "mkdir build"
+    args << ".."
+
+    mkdir 'build' do
+      ENV['Boost_INCLUDE_DIR'] = "#{HOMEBREW_PREFIX}/include"
+      ENV['Boost_LIBRARYS_DIRS'] = "#{HOMEBREW_PREFIX}/lib"
+      system "cmake", *args
+      system "make install"
+    end
+  end
+
+  def caveats
+    <<-EOS
+There is currently a bug when attempting to build with the latest
+release versions of GDAL and libgeotiff. If this functionality is
+required, it is best to build from trunk of the respective SVN
+repositories.
+   EOS
   end
 end