Mercurial > piecrust2

annotate piecrust/cache.py @ 45:efd0d3bacc9e

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Don't recursively clean the cache.
author Ludovic Chabant <ludovic@chabant.com>
date Thu, 21 Aug 2014 23:09:31 -0700
parents 474c9882decf
children 7d2fdf43d7ca
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
45
efd0d3bacc9e Don't recursively clean the cache.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
35 def getCacheDir(self, name):
efd0d3bacc9e Don't recursively clean the cache.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
36 return os.path.join(self.base_dir, name)
efd0d3bacc9e Don't recursively clean the cache.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
37
0
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
38
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
39 class SimpleCache(object):
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
40 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
41 self.base_dir = base_dir
0
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
42 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
43 raise Exception("Cache directory doesn't exist: %s" % base_dir)
0
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
44
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
45 def isValid(self, path, time):
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
46 cache_time = self.getCacheTime(path)
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
47 if cache_time is None:
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
48 return False
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
49 if isinstance(time, list):
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
50 for t in time:
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
51 if cache_time < t:
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
52 return False
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
53 return True
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
54 return cache_time >= time
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
55
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
56 def getCacheTime(self, path):
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
57 cache_path = self.getCachePath(path)
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
58 try:
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
59 return os.path.getmtime(cache_path)
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
60 except os.error:
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
61 return None
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
62
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
63 def has(self, path):
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
64 cache_path = self.getCachePath(path)
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
65 return os.path.isfile(cache_path)
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
66
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
67 def read(self, path):
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
68 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
69 logger.debug("Reading cache: %s" % cache_path)
0
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
70 with codecs.open(cache_path, 'r', 'utf-8') as fp:
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
71 return fp.read()
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
72
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
73 def write(self, path, content):
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
74 cache_path = self.getCachePath(path)
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
75 cache_dir = os.path.dirname(cache_path)
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
76 if not os.path.isdir(cache_dir):
5
474c9882decf Upgrade to Python 3.
Ludovic Chabant <ludovic@chabant.com>
parents: 3
diff changeset
77 os.makedirs(cache_dir, 0o755)
45
efd0d3bacc9e Don't recursively clean the cache.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
78 logger.debug("Writing cache: %s" % cache_path)
0
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
79 with codecs.open(cache_path, 'w', 'utf-8') as fp:
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
80 fp.write(content)
a212a3f2e3ee Initial commit.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
81
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
82 def getCachePath(self, path):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
83 if path.startswith('.'):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
84 path = '__index__' + path
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
85 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
86
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 class NullCache(object):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
89 def isValid(self, path, time):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
90 return False
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
91
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
92 def getCacheTime(self, path):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
93 return None
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
94
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
95 def has(self, path):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
96 return False
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
97
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
98 def read(self, path):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
99 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
100
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
101 def write(self, path, content):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
102 pass
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 def getCachePath(self, path):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
105 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
106
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 class NullExtensibleCache(object):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
109 def __init__(self):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
110 self.null_cache = NullCache()
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 @property
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
113 def enabled(self):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
114 return False
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
115
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
116 def getCache(self, name):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
117 return self.null_cache
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 0
diff changeset
118