Mercurial > piecrust2

annotate piecrust/cache.py @ 39:2f717f961996

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Better error reporting and cache validation. Fix the processor pipeline in the preview server. Move the `pages` route to first position.
author Ludovic Chabant <ludovic@chabant.com>
date Thu, 21 Aug 2014 22:28:22 -0700
parents 474c9882decf
children efd0d3bacc9e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
1 import os
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
2 import os.path
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
3 import codecs
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
4 import logging
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
5 import threading
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
6
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
7
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
8 logger = logging.getLogger(__name__)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
9
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
10
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
11 class ExtensibleCache(object):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
12 def __init__(self, base_dir):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
13 self.base_dir = base_dir
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
14 self.lock = threading.Lock()
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
15 self.caches = {}
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
16
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
17 @property
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
18 def enabled(self):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
19 return True
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
20
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
21 def getCache(self, name):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
22 c = self.caches.get(name)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
23 if c is None:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
24 with self.lock:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
25 c = self.caches.get(name)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
26 if c is None:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
27 c_dir = os.path.join(self.base_dir, name)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
28 if not os.path.isdir(c_dir):
5
474c9882decf Upgrade to Python 3.
Ludovic Chabant <ludovic@chabant.com>
parents: 3
diff changeset
29 os.makedirs(c_dir, 0o755)
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
30
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
31 c = SimpleCache(c_dir)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
32 self.caches[name] = c
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
33 return c
0
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
34
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
35
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
36 class SimpleCache(object):
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
37 def __init__(self, base_dir):
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
38 self.base_dir = base_dir
0
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
39 if not os.path.isdir(base_dir):
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
40 raise Exception("Cache directory doesn't exist: %s" % base_dir)
0
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
41
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
42 def isValid(self, path, time):
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
43 cache_time = self.getCacheTime(path)
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
44 if cache_time is None:
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
45 return False
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
46 if isinstance(time, list):
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
47 for t in time:
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
48 if cache_time < t:
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
49 return False
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
50 return True
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
51 return cache_time >= time
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
52
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
53 def getCacheTime(self, path):
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
54 cache_path = self.getCachePath(path)
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
55 try:
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
56 return os.path.getmtime(cache_path)
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
57 except os.error:
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
58 return None
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
59
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
60 def has(self, path):
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
61 cache_path = self.getCachePath(path)
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
62 return os.path.isfile(cache_path)
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
63
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
64 def read(self, path):
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
65 cache_path = self.getCachePath(path)
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
66 logger.debug("Reading cache: %s" % cache_path)
0
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
67 with codecs.open(cache_path, 'r', 'utf-8') as fp:
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
68 return fp.read()
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
69
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
70 def write(self, path, content):
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
71 cache_path = self.getCachePath(path)
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
72 cache_dir = os.path.dirname(cache_path)
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
73 if not os.path.isdir(cache_dir):
5
474c9882decf Upgrade to Python 3.
Ludovic Chabant <ludovic@chabant.com>
parents: 3
diff changeset
74 os.makedirs(cache_dir, 0o755)
0
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
75 with codecs.open(cache_path, 'w', 'utf-8') as fp:
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
76 fp.write(content)
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
77
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
78 def getCachePath(self, path):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
79 if path.startswith('.'):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
80 path = '__index__' + path
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
81 return os.path.join(self.base_dir, path)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
82
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
83
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
84 class NullCache(object):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
85 def isValid(self, path, time):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
86 return False
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
87
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
88 def getCacheTime(self, path):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
89 return None
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
90
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
91 def has(self, path):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
92 return False
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
93
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
94 def read(self, path):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
95 raise Exception("Null cache has no data.")
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
96
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
97 def write(self, path, content):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
98 pass
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
99
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
100 def getCachePath(self, path):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
101 raise Exception("Null cache can't make paths.")
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
102
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
103
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
104 class NullExtensibleCache(object):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
105 def __init__(self):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
106 self.null_cache = NullCache()
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
107
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
108 @property
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
109 def enabled(self):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
110 return False
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
111
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
112 def getCache(self, name):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
113 return self.null_cache
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
114