Updated API tests.
[redakcja.git] / lib / wlrepo / mercurial_backend / document.py
1 # -*- encoding: utf-8 -*-
2
3 __author__ = "Ɓukasz Rekucki"
4 __date__ = "$2009-09-25 09:35:06$"
5 __doc__ = "Module documentation."
6
7 import wlrepo
8
9 class MercurialDocument(wlrepo.Document):
10
11     def data(self, entry):
12         path = self._revision._docname + '.' + entry            
13         return self._library._filectx(path, \
14             self._revision.hgrev()).data()
15
16     def quickwrite(self, entry, data, msg, user=None):
17         user = user or self.owner
18         if user is None:
19             raise ValueError("Can't determine user.")
20         
21         def write(l, r):
22             f = l._fileopen(r(entry), "w+")
23             f.write(data)
24             f.close()
25             l._fileadd(r(entry))
26
27         return self.invoke_and_commit(write, lambda d: (msg, user))
28
29     def invoke_and_commit(self, ops, before_commit):
30         lock = self._library._lock()
31         try:            
32             self._library._checkout(self._revision.hgrev())
33
34             def entry_path(entry):
35                 return self.id + '.' + entry
36             
37             ops(self._library, entry_path)
38             message, user = before_commit(self)            
39             self._library._commit(message, user)
40
41             return self._library.document(docid=self.id, user=self.owner)
42         finally:
43             lock.release()            
44
45     # def commit(self, message, user):
46     #    """Make a new commit."""
47     #    self.invoke_and_commit(message, user, lambda *a: True)
48
49     def ismain(self):
50         return self._revision.user_name() is None
51
52     def shared(self):
53         if self.ismain():
54             return self
55         return self._library.document(docid=self._revision.document_name())
56
57
58     def take(self, user):
59         fullid = self._library.fulldocid(self.id, user)
60
61         def take_action(library, resolve):
62             # branch from latest 
63             library._create_branch(fullid, parent=self._revision)            
64
65         if not self._library.has_revision(fullid):
66             self.invoke_and_commit(take_action, \
67                 lambda d: ("$AUTO$ File checkout.", user) )
68
69         return self._library.document_for_rev(fullid)
70             
71     def update(self, user):
72         """Update parts of the document."""
73         lock = self.library._lock()
74         try:
75             if self.ismain():
76                 # main revision of the document
77                 return True
78             
79             if self._revision.has_children():
80                 # can't update non-latest revision
81                 return False
82
83             sv = self.shared()
84             
85             if not sv.ancestorof(self) and not self.parentof(sv):
86                 self._revision.merge_with(sv._revision, user=user)
87
88             return True
89         finally:
90             lock.release()  
91
92     def share(self, message):
93         lock = self.library._lock()
94         try:            
95             if self.ismain():
96                 return True # always shared          
97
98             user = self._revision.user_name()
99
100             main = self.shared()._revision
101             local = self._revision
102
103             no_changes = True
104
105             # Case 1:
106             #         * local
107             #         |
108             #         * <- can also be here!
109             #        /|
110             #       / |
111             # main *  *
112             #      |  |
113             # The local branch has been recently updated,
114             # so we don't need to update yet again, but we need to
115             # merge down to default branch, even if there was
116             # no commit's since last update
117
118             if main.ancestorof(local):
119                 print "case 1"
120                 main.merge_with(local, user=user, message=message)
121                 no_changes = False
122             # Case 2:
123             #
124             # main *  * local
125             #      |\ |
126             #      | \|
127             #      |  *
128             #      |  |
129             #
130             # Default has no changes, to update from this branch
131             # since the last merge of local to default.
132             elif local.has_common_ancestor(main):
133                 print "case 2"
134                 if not local.parentof(main):
135                     main.merge_with(local, user=user, message=message)
136                     no_changes = False
137
138             # Case 3:
139             # main *
140             #      |
141             #      * <- this case overlaps with previos one
142             #      |\
143             #      | \
144             #      |  * local
145             #      |  |
146             #
147             # There was a recent merge to the defaul branch and
148             # no changes to local branch recently.
149             #
150             # Use the fact, that user is prepared to see changes, to
151             # update his branch if there are any
152             elif local.ancestorof(main):
153                 print "case 3"
154                 if not local.parentof(main):
155                     local.merge_with(main, user=user, message='Local branch update.')
156                     no_changes = False
157             else:
158                 print "case 4"
159                 local.merge_with(main, user=user, message='Local branch update.')
160                 local = self.shelf()
161                 main.merge_with(local, user=user, message=message)
162
163             print "no_changes: ", no_changes
164             return no_changes
165         finally:
166             lock.release()     
167
168     def __str__(self):
169         return u"Document(%s:%s)" % (self.name, self.owner)
170
171     def __eq__(self, other):
172         return (self._revision == other._revision) and (self.name == other.name)
173