# HG changeset patch
# User John Mulligan <phlogistonjohn@asynchrono.us>
# Date 1262480025 18000
#      Sat Jan 02 19:53:45 2010 -0500
# Node ID 1b7194598aa8b43e9c7d6f4117e1877953ce7b44
# Parent  5206fa5b614b162494f37cbf22b7f31eefc094e7
handle page deletes gracefully

diff --git a/muyhomepage2/app/build.py b/muyhomepage2/app/build.py
--- a/muyhomepage2/app/build.py
+++ b/muyhomepage2/app/build.py
@@ -60,11 +60,18 @@
 
 def build(config):
     website = site.Site()
-    website.pages = site.read_site_pages(config.page_cache())
+    allfiles = set(page.walkpages(config.root()))
+    website.pages = set()
+    cached = set()
+    for cpage in site.read_site_pages(config.page_cache()):
+        if cpage.filename not in allfiles:
+            continue
+        website.pages.add(cpage)
+        cached.add(cpage.filename)
+
     site.update_site_tags(website, config.tag_cache())
     rebuild = set()
-    cached = [p.filename for p in website.pages]
-    for pagefile in page.walkpages(config.root()):
+    for pagefile in allfiles:
         if pagefile not in cached:
             npage = page.parse(pagefile)
             rebuild.add(npage)
@@ -76,13 +83,14 @@
     for spage in website.pages:
         if spage.action in config.always_rebuild():
             rebuild.add(page.parse(spage.filename))
+    # remove any pages from the cache that are gone
     compile_pages(config, website, rebuild)
     site.write_site_pages(website, config.page_cache())
     site.write_site_tags(website, config.tag_cache())
 
 
 def compile_pages(config, website, rebuild):
-    for page in rebuild:
+    for page in sorted(rebuild, key=lambda p: p.filename):
         phandler = handle_action(
             config.handlers(),
             config.defaulthandler(),