+ import jinja2.ext

+ import jinja2.exceptions

+ # See: http://jinja.pocoo.org/docs/latest/extensions/#example-extension

+ class RaiseExtension(jinja2.ext.Extension):

+     # a set of names that trigger the extension.

+     tags = set(["raise"])

+ 

+     def parse(self, parser):

+         # the first token is the token that started the tag.  In our case

+         # we only listen to ``'raise'`` so this will be a name token with

+         # `raise` as value.  We get the line number so that we can give

+         # that line number to the nodes we create by hand.

+         lineno = next(parser.stream).lineno

+ 

+         # Extract the message from the template

+         message_node = parser.parse_expression()

+ 

+         return jinja2.nodes.CallBlock(

+             self.call_method("_raise", [message_node], lineno=lineno),

+             [], [], [], lineno=lineno)

+ 

+     def _raise(self, msg, caller):

+         raise jinja2.exceptions.TemplateRuntimeError(msg)

+ 

+ {% set bins = md.targets|selectattr("kind", "equalto", "bin")|list() %}

+ {% set libs = md.targets|selectattr("kind", "equalto", "lib")|list() %}

+ {% set is_bin = bins|length > 0 %}

+ {% set is_lib = libs|length > 0 %}

+ {% if is_bin and not is_lib %}

+   {% set include_debug = True %}

+   {% set name = "%{crate}" %}

+   {% set include_main = True %}

+   {% set name_devel = None %}

+ {% elif is_lib and not is_bin %}

+   {% set include_debug = False %}

+   {% set name = "rust-%{crate}" %}

+   {% set include_main = False %}

+   {% set name_devel = "   devel" %}

+ {% elif is_bin and is_lib %}

+   {% set include_debug = True %}

+   {% set name = "%{crate}" %}

+   {% set include_main = True %}

+   {% set name_devel = "-n rust-%{crate}-devel" %}

+ {% else %}

+   {% raise "No bins and no libs" %}

+ {% endif %}

+ {% if not include_debug %}

+ {% endif %}

+ Name:           {{ name }}

+ {% if name_devel is not none %}

+ %package     {{ name_devel }}

+ %description {{ name_devel }}

+ {% endif %}

+ {% if include_main %}

+ %files

+ {% for bin in bins %}

+ %{_bindir}/{{ bin.name }}

+ {% endfor %}

+ 

+ {% endif %}

+ {% if name_devel is not none %}

+ %files       {{ name_devel }}

+ {% endif %}

+                                extensions=[RaiseExtension],