1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
from gecko_taskgraph.util.copy_task import copy_task
def merge_to(source, dest):
"""
Merge dict and arrays (override scalar values)
Keys from source override keys from dest, and elements from lists in source
are appended to lists in dest.
:param dict source: to copy from
:param dict dest: to copy to (modified in place)
"""
for key, value in source.items():
if (
isinstance(value, dict)
and len(value) == 1
and list(value)[0].startswith("by-")
):
# Do not merge by-* values as this is likely to confuse someone
dest[key] = value
continue
# Override mismatching or empty types
if type(value) != type(dest.get(key)): # noqa
dest[key] = value
continue
# Merge dict
if isinstance(value, dict):
merge_to(value, dest[key])
continue
if isinstance(value, list):
dest[key] = dest[key] + value
continue
dest[key] = value
return dest
def merge(*objects):
"""
Merge the given objects, using the semantics described for merge_to, with
objects later in the list taking precedence. From an inheritance
perspective, "parents" should be listed before "children".
Returns the result without modifying any arguments.
"""
if len(objects) == 1:
return copy_task(objects[0])
return merge_to(objects[-1], merge(*objects[:-1]))
|
