--- a/publish_edition.py	Sun Jan 03 09:16:37 2010 -0800
+++ b/publish_edition.py	Sun Jan 03 09:20:29 2010 -0800
@@ -139,7 +139,8 @@
 
 def publish_edition(update_whoisi=False,
                     update_urls=False,
-                    update_articles=False):
+                    update_articles=False,
+                    dry_run=False):
     if update_whoisi:
         update_urls = True
     if update_urls:
@@ -170,7 +171,8 @@
         people_indexes = [people.index(person)
                           for person in following]
         wicache.refresh_people(people_indexes)
-        save(people, WHOISI_FILENAME)
+        if not dry_run:
+            save(people, WHOISI_FILENAME)
 
     feeds = {}
 
@@ -185,7 +187,8 @@
 
     if update_urls:
         refresh_urls(feeds=feeds, urls=urls)
-        save(urls, URLS_FILENAME)
+        if not dry_run:
+            save(urls, URLS_FILENAME)
 
     articles = load(ARTICLES_FILENAME, {})
 
@@ -193,7 +196,8 @@
         refresh_articles(articles=articles,
                          feeds=feeds,
                          urls=urls)
-        save(articles, ARTICLES_FILENAME)
+        if not dry_run:
+            save(articles, ARTICLES_FILENAME)
 
     issues = load(ISSUES_FILENAME, {'urls': {},
                                     'pub_dates': []})
@@ -207,12 +211,14 @@
     for author in filtered_articles:
         for article in filtered_articles[author]:
             issues['urls'][article['url']] = issue_id
-    save(issues, ISSUES_FILENAME)
+    if not dry_run:
+        save(issues, ISSUES_FILENAME)
 
-    json.dump({'authors': names, 'articles': filtered_articles},
-              open(JSON_FILENAME, 'w'))
+    if not dry_run:
+        json.dump({'authors': names, 'articles': filtered_articles},
+                  open(JSON_FILENAME, 'w'))
 
-    logging.info('wrote %s (issue #%d).' % (JSON_FILENAME, issue_id))
+        logging.info('wrote %s (issue #%d).' % (JSON_FILENAME, issue_id))
 
 parser_options = {
     ('-w', '--refresh-whoisi',): 
@@ -232,6 +238,12 @@
          help='re-parse feeds',
          action='store_true',
          default=False),
+
+    ('-d', '--dry-run',): 
+    dict(dest='dry_run',
+         help='do not write anything to disk',
+         action='store_true',
+         default=False),
 }
 
 if __name__ == '__main__':