metadata: parse description

New cargo exposes description, so we can even generate summary out
of it.

We will need to do some pre-processing in future, but good enough for
the beginning.

Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>

rust2rpm/__main__.py

@@ -71,7 +71,7 @@ TEMPLATE = """# Generated by rust2rpm
 Name:           {{ name }}
 Version:        {{ md.version }}
 Release:        1%{?dist}
-Summary:        # FIXME
+Summary:        {{ md.description|default("# FIXME") }}
 
 License:        {{ md.license|default("# FIXME") }}
 URL:            https://crates.io/crates/{{ md.name }}

rust2rpm/metadata.py

@@ -39,6 +39,7 @@ class Metadata(object):
         self.name = None
         self.license = None
         self.license_file = None
+        self.description = None
         self._version = None
         self._targets = []
         self._provides = []
@@ -57,6 +58,7 @@ class Metadata(object):
         self.name = md["name"]
         self.license = md["license"]
         self.license_file = md["license_file"]
+        self.description = md.get("description")
         self._version = semver.SpecItem("={}".format(md["version"]))
 
         # Targets