Mercurial > public > mercurial-scm > hg-stable

annotate mercurial/namespaces.py @ 23555:f08f6a7d4d5f

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
namespaces: add a function to turn single results into lists
author Sean Farley <sean.michael.farley@gmail.com>
date Sun, 14 Dec 2014 15:04:40 -0800
parents 75f9643cab1b
children 7e1da5d004eb
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
23553
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
1 from mercurial import util
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
2
23555
f08f6a7d4d5f namespaces: add a function to turn single results into lists
Sean Farley <sean.michael.farley@gmail.com>
parents: 23554
diff changeset
3 def tolist(val):
f08f6a7d4d5f namespaces: add a function to turn single results into lists
Sean Farley <sean.michael.farley@gmail.com>
parents: 23554
diff changeset
4 """
f08f6a7d4d5f namespaces: add a function to turn single results into lists
Sean Farley <sean.michael.farley@gmail.com>
parents: 23554
diff changeset
5 a convenience method to return an empty list instead of None
f08f6a7d4d5f namespaces: add a function to turn single results into lists
Sean Farley <sean.michael.farley@gmail.com>
parents: 23554
diff changeset
6 """
f08f6a7d4d5f namespaces: add a function to turn single results into lists
Sean Farley <sean.michael.farley@gmail.com>
parents: 23554
diff changeset
7 if val is None:
f08f6a7d4d5f namespaces: add a function to turn single results into lists
Sean Farley <sean.michael.farley@gmail.com>
parents: 23554
diff changeset
8 return []
f08f6a7d4d5f namespaces: add a function to turn single results into lists
Sean Farley <sean.michael.farley@gmail.com>
parents: 23554
diff changeset
9 else:
f08f6a7d4d5f namespaces: add a function to turn single results into lists
Sean Farley <sean.michael.farley@gmail.com>
parents: 23554
diff changeset
10 return [val]
f08f6a7d4d5f namespaces: add a function to turn single results into lists
Sean Farley <sean.michael.farley@gmail.com>
parents: 23554
diff changeset
11
23553
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
12 class namespaces(object):
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
13 """
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
14 provides an interface to register a generic many-to-many mapping between
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
15 some (namespaced) names and nodes. The goal here is to control the
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
16 pollution of jamming things into tags or bookmarks (in extension-land) and
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
17 to simplify internal bits of mercurial: log output, tab completion, etc.
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
18
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
19 More precisely, we define a list of names (the namespace) and a mapping of
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
20 names to nodes. This name mapping returns a list of nodes.
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
21
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
22 Furthermore, each name mapping will be passed a name to lookup which might
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
23 not be in its domain. In this case, each method should return an empty list
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
24 and not raise an error.
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
25
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
26 We'll have a dictionary '_names' where each key is a namespace and
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
27 its value is a dictionary of functions:
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
28 'namemap': function that takes a name and returns a list of nodes
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
29 """
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
30
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
31 _names_version = 0
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
32
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
33 def __init__(self):
7cebb6a8c75f namespaces: introduce a generic way to map between names and nodes
Sean Farley <sean.michael.farley@gmail.com>
parents:
diff changeset
34 self._names = util.sortdict()
23554
75f9643cab1b namespaces: add a method to register new namespaces
Sean Farley <sean.michael.farley@gmail.com>
parents: 23553
diff changeset
35
75f9643cab1b namespaces: add a method to register new namespaces
Sean Farley <sean.michael.farley@gmail.com>
parents: 23553
diff changeset
36 def addnamespace(self, namespace, namemap, order=None):
75f9643cab1b namespaces: add a method to register new namespaces
Sean Farley <sean.michael.farley@gmail.com>
parents: 23553
diff changeset
37 """
75f9643cab1b namespaces: add a method to register new namespaces
Sean Farley <sean.michael.farley@gmail.com>
parents: 23553
diff changeset
38 register a namespace
75f9643cab1b namespaces: add a method to register new namespaces
Sean Farley <sean.michael.farley@gmail.com>
parents: 23553
diff changeset
39
75f9643cab1b namespaces: add a method to register new namespaces
Sean Farley <sean.michael.farley@gmail.com>
parents: 23553
diff changeset
40 namespace: the name to be registered (in plural form)
75f9643cab1b namespaces: add a method to register new namespaces
Sean Farley <sean.michael.farley@gmail.com>
parents: 23553
diff changeset
41 namemap: function that inputs a node, output name(s)
75f9643cab1b namespaces: add a method to register new namespaces
Sean Farley <sean.michael.farley@gmail.com>
parents: 23553
diff changeset
42 order: optional argument to specify the order of namespaces
75f9643cab1b namespaces: add a method to register new namespaces
Sean Farley <sean.michael.farley@gmail.com>
parents: 23553
diff changeset
43 (e.g. 'branches' should be listed before 'bookmarks')
75f9643cab1b namespaces: add a method to register new namespaces
Sean Farley <sean.michael.farley@gmail.com>
parents: 23553
diff changeset
44 """
75f9643cab1b namespaces: add a method to register new namespaces
Sean Farley <sean.michael.farley@gmail.com>
parents: 23553
diff changeset
45 val = {'namemap': namemap}
75f9643cab1b namespaces: add a method to register new namespaces
Sean Farley <sean.michael.farley@gmail.com>
parents: 23553
diff changeset
46 if order is not None:
75f9643cab1b namespaces: add a method to register new namespaces
Sean Farley <sean.michael.farley@gmail.com>
parents: 23553
diff changeset
47 self._names.insert(order, namespace, val)
75f9643cab1b namespaces: add a method to register new namespaces
Sean Farley <sean.michael.farley@gmail.com>
parents: 23553
diff changeset
48 else:
75f9643cab1b namespaces: add a method to register new namespaces
Sean Farley <sean.michael.farley@gmail.com>
parents: 23553
diff changeset
49 self._names[namespace] = val