# HG changeset patch
# User Ludovic Chabant <ludovic@chabant.com>
# Date 1428085371 25200
# Node ID aa6b7ff6a1933f53c41eaaf0486ad4957fafa4f2
# Parent  8511137d1b629c10c178c229ae58846aa2e5d23c
internal: Use hashes for cache paths.

This will prevent collisions (_e.g._ between `foo/bar` and `foo_bar`), and
generating paths that are too long and exceed OS limits.

diff -r 8511137d1b62 -r aa6b7ff6a193 piecrust/environment.py
--- a/piecrust/environment.py	Fri Apr 03 11:20:30 2015 -0700
+++ b/piecrust/environment.py	Fri Apr 03 11:22:51 2015 -0700
@@ -2,6 +2,7 @@
 import time
 import json
 import logging
+import hashlib
 import threading
 import contextlib
 import collections
@@ -15,7 +16,7 @@
 
 
 def _make_fs_cache_key(key):
-    return re_fs_cache_key.sub('_', key)
+    return hashlib.md5(key.encode('utf8')).hexdigest()
 
 
 class MemCache(object):
diff -r 8511137d1b62 -r aa6b7ff6a193 piecrust/page.py
--- a/piecrust/page.py	Fri Apr 03 11:20:30 2015 -0700
+++ b/piecrust/page.py	Fri Apr 03 11:22:51 2015 -0700
@@ -251,8 +251,7 @@
 def _do_load_page(app, path, path_mtime):
     # Check the cache first.
     cache = app.cache.getCache('pages')
-    rel_path = os.path.relpath(path, app.root_dir)
-    cache_path = "%s.json" % rel_path.replace('/', '_').strip('_')
+    cache_path = hashlib.md5(path.encode('utf8')).hexdigest() + '.json'
     page_time = path_mtime or os.path.getmtime(path)
     if cache.isValid(cache_path, page_time):
         cache_data = json.loads(cache.read(cache_path),