Merge pull request #742 from KineticTheory/pkg-dia

Provide dia

var/spack/repos/builtin/packages/dia/package.py

+from spack import *
+
+class Dia(Package):
+    """Dia is a program for drawing structured diagrams."""
+    homepage  = 'https://wiki.gnome.org/Apps/Dia'
+    url       = 'https://ftp.gnome.org/pub/gnome/sources/dia/0.97/dia-0.97.3.tar.xz'
+
+    version('0.97.3',    '0e744a0f6a6c4cb6a089e4d955392c3c')
+
+    depends_on('gtkplus@2.6.0:')
+    depends_on('cairo')
+    #depends_on('libart') # optional dependency, not yet supported by spack.
+    depends_on('libpng')
+    depends_on('libxslt')
+    depends_on('python')
+    depends_on('swig')
+    # depends_on('py-gtk') # optional dependency, not yet supported by spack.
+
+    def url_for_version(self, version):
+        """Handle Dia's version-based custom URLs."""
+        return 'https://ftp.gnome.org/pub/gnome/source/dia/%s/dia-%s.tar.xz' % (version.up_to(2), version)
+
+    def install(self, spec, prefix):
+
+        # configure, build, install:
+        options = ['--prefix=%s' % prefix,
+                   '--with-cairo',
+                   '--with-xslt-prefix=%s' % spec['libxslt'].prefix,
+                   '--with-python',
+                   '--with-swig']
+
+        configure(*options)
+        make()
+        make('install')