substitute scrapy_settings template variables on startproject

--HG--
extra : convert_revision : svn%3Ab85faa78-f9eb-468e-a121-7cced6da292c%40382

scrapy/trunk/scrapy/bin/scrapy-admin.py

@@ -1,9 +1,11 @@
 #!/usr/bin/env python
 """Scrapy admin script is used to create new scrapy projects and similar
 tasks"""
+from __future__ import with_statement
 
 import os
 import shutil
+import string
 from optparse import OptionParser
 
 import scrapy
@@ -17,12 +19,27 @@ Available commands:
       Starts a new project with name 'project_name'
 """
 
+TEMPLATES = (
+        'scrapy_settings.py',
+        )
+
+def render_templatefile(path, **kwargs):
+    with open(path, 'rb') as file:
+        raw = file.read()
+
+    content = string.Template(raw).substitute(**kwargs)
+
+    with open(path, 'wb') as file:
+        file.write(content)
+
+
 def main():
     parser = OptionParser(usage=usage)
     opts, args = parser.parse_args()
     
     if not args:
         parser.print_help()
+        return
 
     cmd = args[0]
     if cmd == "startproject":
@@ -30,6 +47,8 @@ def main():
             project_name = args[1]
             project_tplpath = os.path.join(scrapy.__path__[0], "conf", "project_template")
             shutil.copytree(project_tplpath, project_name)
+            for path in TEMPLATES:
+                render_templatefile(os.path.join(project_name, path), project_name=project_name)
         else:
             print "scrapy-admin.py: missing project name"
     else: