Fix errors when license metadata is not set

CHANGELOG.md

@@ -16,6 +16,7 @@
 
 - Fixed `install_requires` and `extras` in generated sdist.
 - Fixed dependency resolution crash with malformed dependencies.
+- Fixed errors when `license` metadata is not set.
 
 
 ## [0.7.1] - 2018-04-05

poetry/masonry/metadata.py

@@ -52,7 +52,10 @@ class Metadata:
         meta.home_page = package.homepage or package.repository_url
         meta.author = package.author_name
         meta.author_email = package.author_email
-        meta.license = package.license.id
+
+        if package.license:
+            meta.license = package.license.id
+
         meta.classifiers = package.all_classifiers
 
         # Version 1.2

poetry/packages/package.py

@@ -202,9 +202,9 @@ class Package(object):
     @license.setter
     def license(self, value):
         if value is None:
-            self._license = license
+            self._license = value
         elif isinstance(value, License):
-            self._license = license
+            self._license = value
         else:
             self._license = license_by_id(value)
     
@@ -230,8 +230,9 @@ class Package(object):
                     'Programming Language :: Python :: {}'.format(version)
                 )
 
-        # Automatically set license classifers
-        classifiers.append(self.license.classifier)
+        # Automatically set license classifiers
+        if self.license:
+            classifiers.append(self.license.classifier)
 
         classifiers = set(classifiers)
 

poetry/poetry.py

@@ -7,7 +7,6 @@ import jsonschema
 
 from .__version__ import __version__
 from .config import Config
-from .console.commands.config import TEMPLATE
 from .exceptions import InvalidProjectFile
 from .packages import Dependency
 from .packages import Locker