Mercurial > piecrust2
annotate piecrust/configuration.py @ 38:091f99bfbe44
Fix running `chef` outside of a website. Slightly better error reporting.
| author | Ludovic Chabant <ludovic@chabant.com> |
|---|---|
| date | Thu, 21 Aug 2014 10:56:17 -0700 |
| parents | 474c9882decf |
| children | 563ce5dd02af |
| rev | line source |
|---|---|
| 0 | 1 import re |
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2
40fa08b261b9
Added unit tests (using `py.test`) for `Configuration`.
Ludovic Chabant <ludovic@chabant.com>
parents:
0
diff
changeset
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2 import logging |
| 0 | 3 import yaml |
| 4 | |
| 5 | |
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2
40fa08b261b9
Added unit tests (using `py.test`) for `Configuration`.
Ludovic Chabant <ludovic@chabant.com>
parents:
0
diff
changeset
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6 logger = logging.getLogger(__name__) |
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40fa08b261b9
Added unit tests (using `py.test`) for `Configuration`.
Ludovic Chabant <ludovic@chabant.com>
parents:
0
diff
changeset
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7 |
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40fa08b261b9
Added unit tests (using `py.test`) for `Configuration`.
Ludovic Chabant <ludovic@chabant.com>
parents:
0
diff
changeset
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8 |
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3
f485ba500df3
Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
2
diff
changeset
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9 class ConfigurationError(Exception): |
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f485ba500df3
Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
2
diff
changeset
|
10 pass |
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f485ba500df3
Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
2
diff
changeset
|
11 |
|
f485ba500df3
Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
2
diff
changeset
|
12 |
| 0 | 13 class Configuration(object): |
| 14 def __init__(self, values=None, validate=True): | |
| 15 if values is not None: | |
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3
f485ba500df3
Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
2
diff
changeset
|
16 self.setAll(values, validate) |
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2
40fa08b261b9
Added unit tests (using `py.test`) for `Configuration`.
Ludovic Chabant <ludovic@chabant.com>
parents:
0
diff
changeset
|
17 else: |
|
40fa08b261b9
Added unit tests (using `py.test`) for `Configuration`.
Ludovic Chabant <ludovic@chabant.com>
parents:
0
diff
changeset
|
18 self._values = None |
| 0 | 19 |
|
3
f485ba500df3
Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
2
diff
changeset
|
20 def setAll(self, values, validate=True): |
| 0 | 21 if validate: |
| 22 self._validateAll(values) | |
| 23 self._values = values | |
| 24 | |
|
3
f485ba500df3
Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
2
diff
changeset
|
25 def getAll(self): |
|
f485ba500df3
Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
2
diff
changeset
|
26 return self.get() |
|
f485ba500df3
Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
2
diff
changeset
|
27 |
| 0 | 28 def get(self, key_path=None): |
| 29 self._ensureLoaded() | |
| 30 if key_path is None: | |
| 31 return self._values | |
| 32 bits = key_path.split('/') | |
| 33 cur = self._values | |
| 34 for b in bits: | |
| 35 cur = cur.get(b) | |
| 36 if cur is None: | |
| 37 return None | |
| 38 return cur | |
| 39 | |
| 40 def set(self, key_path, value): | |
| 41 self._ensureLoaded() | |
| 42 value = self._validateValue(key_path, value) | |
| 43 bits = key_path.split('/') | |
| 44 bitslen = len(bits) | |
| 45 cur = self._values | |
| 46 for i, b in enumerate(bits): | |
| 47 if i == bitslen - 1: | |
| 48 cur[b] = value | |
| 49 else: | |
| 50 if b not in cur: | |
| 51 cur[b] = {} | |
| 52 cur = cur[b] | |
| 53 | |
| 54 def has(self, key_path): | |
| 55 self._ensureLoaded() | |
| 56 bits = key_path.split('/') | |
| 57 cur = self._values | |
| 58 for b in bits: | |
| 59 cur = cur.get(b) | |
| 60 if cur is None: | |
| 61 return False | |
| 62 return True | |
| 63 | |
| 64 def merge(self, other): | |
| 65 self._ensureLoaded() | |
| 66 merge_dicts(self._values, other._values, | |
| 67 validator=self._validateValue) | |
| 68 | |
| 69 def _ensureLoaded(self): | |
| 70 if self._values is None: | |
| 71 self._load() | |
| 72 | |
| 73 def _load(self): | |
| 74 self._values = self._validateAll({}) | |
| 75 | |
| 76 def _validateAll(self, values): | |
| 77 return values | |
| 78 | |
| 79 def _validateValue(self, key_path, value): | |
| 80 return value | |
| 81 | |
| 82 | |
|
3
f485ba500df3
Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
2
diff
changeset
|
83 def merge_dicts(source, merging, validator=None, *args): |
| 0 | 84 if validator is None: |
| 85 validator = lambda k, v: v | |
|
2
40fa08b261b9
Added unit tests (using `py.test`) for `Configuration`.
Ludovic Chabant <ludovic@chabant.com>
parents:
0
diff
changeset
|
86 _recurse_merge_dicts(source, merging, None, validator) |
|
3
f485ba500df3
Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
2
diff
changeset
|
87 for other in args: |
|
f485ba500df3
Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
2
diff
changeset
|
88 _recurse_merge_dicts(source, other, None, validator) |
| 0 | 89 |
|
2
40fa08b261b9
Added unit tests (using `py.test`) for `Configuration`.
Ludovic Chabant <ludovic@chabant.com>
parents:
0
diff
changeset
|
90 |
|
40fa08b261b9
Added unit tests (using `py.test`) for `Configuration`.
Ludovic Chabant <ludovic@chabant.com>
parents:
0
diff
changeset
|
91 def _recurse_merge_dicts(local_cur, incoming_cur, parent_path, validator): |
| 5 | 92 for k, v in incoming_cur.items(): |
| 0 | 93 key_path = k |
| 94 if parent_path is not None: | |
| 95 key_path = parent_path + '/' + k | |
| 96 | |
| 97 local_v = local_cur.get(k) | |
| 98 if local_v is not None: | |
| 99 if isinstance(v, dict) and isinstance(local_v, dict): | |
|
2
40fa08b261b9
Added unit tests (using `py.test`) for `Configuration`.
Ludovic Chabant <ludovic@chabant.com>
parents:
0
diff
changeset
|
100 _recurse_merge_dicts(local_v, v, key_path, validator) |
| 0 | 101 elif isinstance(v, list) and isinstance(local_v, list): |
| 102 local_cur[k] = v + local_v | |
| 103 else: | |
| 104 local_cur[k] = validator(key_path, v) | |
| 105 else: | |
| 106 local_cur[k] = validator(key_path, v) | |
| 107 | |
| 108 | |
| 109 header_regex = re.compile( | |
| 110 r'(---\s*\n)(?P<header>(.*\n)*?)^(---\s*\n)', re.MULTILINE) | |
| 111 | |
| 112 | |
| 113 def parse_config_header(text): | |
| 114 m = header_regex.match(text) | |
| 115 if m is not None: | |
| 5 | 116 header = str(m.group('header')) |
|
3
f485ba500df3
Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
2
diff
changeset
|
117 config = yaml.load(header, Loader=yaml.BaseLoader) |
| 0 | 118 offset = m.end() |
| 119 else: | |
| 120 config = {} | |
| 121 offset = 0 | |
| 122 return config, offset | |
| 123 |