add global license capabability as a plugin

plugins_samples/global_license.py

@@ -0,0 +1,23 @@
+from blinker import signal
+
+"""
+License plugin for Pelican
+==========================
+
+Simply add license variable in article's context, which contain 
+the license text.
+
+Settings:
+---------
+
+Add LICENSE to your settings file to define default license.
+
+"""
+
+def add_license(generator, metadatas):
+    if 'license' not in metadatas.keys()\
+        and 'LICENSE' in self.settings.keys():
+            metadatas['license'] = self.settings['LICENSE']
+
+
+signal('pelican_article_generate_context').connect(add_license)