1 files changed, 22 insertions, 0 deletions
diff --git a/unperish b/unperish
index 506c501..6ced5b7 100755
--- a/unperish
+++ b/unperish
@@ -75,6 +75,7 @@ class Unperish(cliapp.Application):
                              'upstream version for project')
     
     def process_args(self, args):
+        self.deduce_unset_settings()
         self.create_build_area()
         
         self.already = set()
@@ -106,6 +107,27 @@ class Unperish(cliapp.Application):
             else:
                 raise cliapp.AppException('unknown command %s' % subcommand)
 
+    def deduce_unset_settings(self):
+
+        def deduce_upstream_name():
+            if os.path.exists('setup.py'):
+                return self.runcmd(['python', 'setup.py', '--name']).strip()
+            return ''
+
+        def deduce_upstream_version():
+            if os.path.exists('setup.py'):
+                return self.runcmd(['python', 'setup.py', '--version']).strip()
+            return ''
+            
+        table = {
+            'upstream-name': deduce_upstream_name,
+            'upstream-version': deduce_upstream_version,
+        }
+        
+        for name in table:
+            if not self.settings[name]:
+                self.settings[name] = table[name]()
+
     def create_build_area(self):
         if not os.path.exists(self.settings['build-area']):
             os.mkdir(self.settings['build-area'])