2012-02-21: FIX: Fixed the breaking on not yet existing files at the right

FIX: Fixed the breaking on not yet existing files at the right place: contentequals now returns False, when the file does not yet exist.

diff --git a/site.py b/site.py
--- a/site.py
+++ b/site.py
@@ -80,6 +80,8 @@ def contentequals(filepath, content):
         with open(filepath) as f: 
             return f.read() == content
     except OSError: return not content
+    except IOError: return False # file does not exist. Empty != not existing.
+    # TODO: check: return True if content is None?
 
 def parsereadme(filepath):
     """Parse the readme file"""
@@ -168,8 +170,9 @@ def writeoverview(ui, repo, target, name
 
     # finish the overview
     overview += templates["foot"]
-    if not contentequals(join(target, "index.html"), overview): 
-        with open(join(target, "index.html"), "w") as f: 
+    indexfile = join(target, "index.html")
+    if not contentequals(indexfile, overview): 
+        with open(indexfile, "w") as f: 
             f.write(overview)
 
 def writelog(ui, repo, target, name):
@@ -354,14 +357,14 @@ def parsesite(ui, repo, target, **opts):
     screenfile = join(target, "style.css")
     if screenstyle and not samefilecontent(screenstyle, screenfile):
         shutil.copyfile(screenstyle, screenfile)
-    elif not isfile(screenfile) or not contentequals(screenfile,templates["screenstyle"]):
+    elif not contentequals(screenfile,templates["screenstyle"]):
         with open(screenfile, "w") as f:
             f.write(templates["screenstyle"])
     printstyle = opts["printstyle"]
     printfile = join(target, "print.css")
     if printstyle and not samefilecontent(printstyle, printfile):
         shutil.copyfile(printstyle, printfile)
-    elif not isfile(printfile) or not contentequals(printfile, templates["printstyle"]):
+    elif not contentequals(printfile, templates["printstyle"]):
         with open(printfile, "w") as f:
             f.write(templates["printstyle"])