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ByronByron
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Initially put SymbolicRef as base class of Reference, which theoretically is how it should be, but many tests are still failing as the implementation is not yet there
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‎lib/git/refs.py

Lines changed: 161 additions & 185 deletions
Original file line numberDiff line numberDiff line change
@@ -10,192 +10,8 @@
1010
from objects.utils import get_object_type_by_name
1111
from utils import LazyMixin, Iterable, join_path, join_path_native, to_native_path_linux
1212

13-
class Reference(LazyMixin, Iterable):
14-
"""
15-
Represents a named reference to any object. Subclasses may apply restrictions though,
16-
i.e. Heads can only point to commits.
17-
"""
18-
__slots__ = ("repo", "path")
19-
_common_path_default = "refs"
20-
_id_attribute_ = "name"
21-
22-
def __init__(self, repo, path):
23-
"""
24-
Initialize this instance
25-
``repo``
26-
Our parent repository
27-
28-
``path``
29-
Path relative to the .git/ directory pointing to the ref in question, i.e.
30-
refs/heads/master
31-
32-
"""
33-
if not path.startswith(self._common_path_default):
34-
raise ValueError("Cannot instantiate %s from path %s" % ( self.__class__.__name__, path ))
35-
36-
self.repo = repo
37-
self.path = path
38-
39-
def __str__(self):
40-
return self.name
41-
42-
def __repr__(self):
43-
return '<git.%s "%s">' % (self.__class__.__name__, self.path)
44-
45-
def __eq__(self, other):
46-
return self.path == other.path
47-
48-
def __ne__(self, other):
49-
return not ( self == other )
50-
51-
def __hash__(self):
52-
return hash(self.path)
53-
54-
@property
55-
def name(self):
56-
"""
57-
Returns
58-
(shortest) Name of this reference - it may contain path components
59-
"""
60-
# first two path tokens are can be removed as they are
61-
# refs/heads or refs/tags or refs/remotes
62-
tokens = self.path.split('/')
63-
if len(tokens) < 3:
64-
return self.path # could be refs/HEAD
65-
66-
return '/'.join(tokens[2:])
67-
68-
def _get_object(self):
69-
"""
70-
Returns
71-
The object our ref currently refers to. Refs can be cached, they will
72-
always point to the actual object as it gets re-created on each query
73-
"""
74-
# have to be dynamic here as we may be a tag which can point to anything
75-
# Our path will be resolved to the hexsha which will be used accordingly
76-
return Object.new(self.repo, self.path)
77-
78-
def _set_object(self, ref):
79-
"""
80-
Set our reference to point to the given ref. It will be converted
81-
to a specific hexsha.
82-
83-
Note:
84-
TypeChecking is done by the git command
85-
"""
86-
# do it safely by specifying the old value
87-
self.repo.git.update_ref(self.path, ref, self._get_object().sha)
88-
89-
object = property(_get_object, _set_object, doc="Return the object our ref currently refers to")
90-
91-
def _set_commit(self, commit):
92-
"""
93-
Set ourselves to point to the given commit.
94-
95-
Raise
96-
ValueError if commit does not actually point to a commit
97-
"""
98-
self._set_object(commit)
99-
100-
def _get_commit(self):
101-
"""
102-
Returns
103-
Commit object the reference points to
104-
"""
105-
commit = self.object
106-
if commit.type != "commit":
107-
raise TypeError("Object of reference %s did not point to a commit, but to %r" % (self, commit))
108-
return commit
109-
110-
commit = property(_get_commit, _set_commit, doc="Return Commit object the reference points to")
111-
112-
@classmethod
113-
def iter_items(cls, repo, common_path = None, **kwargs):
114-
"""
115-
Find all refs in the repository
116-
117-
``repo``
118-
is the Repo
119-
120-
``common_path``
121-
Optional keyword argument to the path which is to be shared by all
122-
returned Ref objects.
123-
Defaults to class specific portion if None assuring that only
124-
refs suitable for the actual class are returned.
125-
126-
Returns
127-
git.Reference[]
128-
129-
List is lexigraphically sorted
130-
The returned objects represent actual subclasses, such as Head or TagReference
131-
"""
132-
if common_path is None:
133-
common_path = cls._common_path_default
134-
135-
rela_paths = set()
136-
137-
# walk loose refs
138-
# Currently we do not follow links
139-
for root, dirs, files in os.walk(join_path_native(repo.path, common_path)):
140-
for f in files:
141-
abs_path = to_native_path_linux(join_path(root, f))
142-
rela_paths.add(abs_path.replace(to_native_path_linux(repo.path) + '/', ""))
143-
# END for each file in root directory
144-
# END for each directory to walk
145-
146-
# read packed refs
147-
packed_refs_path = join_path_native(repo.path, 'packed-refs')
148-
if os.path.isfile(packed_refs_path):
149-
fp = open(packed_refs_path, 'r')
150-
try:
151-
for line in fp.readlines():
152-
if line.startswith('#'):
153-
continue
154-
# 439689865b9c6e2a0dad61db22a0c9855bacf597 refs/heads/hello
155-
line = line.rstrip()
156-
first_space = line.find(' ')
157-
if first_space == -1:
158-
continue
159-
160-
rela_path = line[first_space+1:]
161-
if rela_path.startswith(common_path):
162-
rela_paths.add(rela_path)
163-
# END relative path matches common path
164-
# END for each line in packed-refs
165-
finally:
166-
fp.close()
167-
# END packed refs reading
168-
169-
# return paths in sorted order
170-
for path in sorted(rela_paths):
171-
if path.endswith('/HEAD'):
172-
continue
173-
# END skip remote heads
174-
yield cls.from_path(repo, path)
175-
# END for each sorted relative refpath
176-
177-
178-
@classmethod
179-
def from_path(cls, repo, path):
180-
"""
181-
Return
182-
Instance of type Reference, Head, or Tag
183-
depending on the given path
184-
"""
185-
if not path:
186-
raise ValueError("Cannot create Reference from %r" % path)
187-
188-
for ref_type in (Head, RemoteReference, TagReference, Reference):
189-
try:
190-
return ref_type(repo, path)
191-
except ValueError:
192-
pass
193-
# END exception handling
194-
# END for each type to try
195-
raise ValueError("Could not find reference type suitable to handle path %r" % path)
196-
19713

198-
class SymbolicReference(object):
14+
class SymbolicReference(object):
19915
"""
20016
Represents a special case of a reference such that this reference is symbolic.
20117
It does not point to a specific commit, but to another Head, which itself
@@ -224,6 +40,15 @@ def __ne__(self, other):
22440
def __hash__(self):
22541
return hash(self.path)
22642

43+
@property
44+
def name(self):
45+
"""
46+
Returns
47+
In case of symbolic references, the shortest assumable name
48+
is the path itself.
49+
"""
50+
return self.path
51+
22752
def _get_path(self):
22853
return join_path_native(self.repo.path, self.path)
22954

@@ -356,6 +181,157 @@ def from_path(cls, repo, path):
356181
return SymbolicReference(repo, path)
357182

358183
raise ValueError("Could not find symbolic reference type suitable to handle path %r" % path)
184+
185+
186+
class Reference(SymbolicReference, LazyMixin, Iterable):
187+
"""
188+
Represents a named reference to any object. Subclasses may apply restrictions though,
189+
i.e. Heads can only point to commits.
190+
"""
191+
__slots__ = tuple()
192+
_common_path_default = "refs"
193+
_id_attribute_ = "name"
194+
195+
def __init__(self, repo, path):
196+
"""
197+
Initialize this instance
198+
``repo``
199+
Our parent repository
200+
201+
``path``
202+
Path relative to the .git/ directory pointing to the ref in question, i.e.
203+
refs/heads/master
204+
205+
"""
206+
if not path.startswith(self._common_path_default):
207+
raise ValueError("Cannot instantiate %s from path %s" % ( self.__class__.__name__, path ))
208+
super(Reference, self).__init__(repo, path)
209+
210+
211+
def __str__(self):
212+
return self.name
213+
214+
def _get_object(self):
215+
"""
216+
Returns
217+
The object our ref currently refers to. Refs can be cached, they will
218+
always point to the actual object as it gets re-created on each query
219+
"""
220+
# have to be dynamic here as we may be a tag which can point to anything
221+
# Our path will be resolved to the hexsha which will be used accordingly
222+
return Object.new(self.repo, self.path)
223+
224+
def _set_object(self, ref):
225+
"""
226+
Set our reference to point to the given ref. It will be converted
227+
to a specific hexsha.
228+
229+
Note:
230+
TypeChecking is done by the git command
231+
"""
232+
# do it safely by specifying the old value
233+
self.repo.git.update_ref(self.path, ref, self._get_object().sha)
234+
235+
object = property(_get_object, _set_object, doc="Return the object our ref currently refers to")
236+
237+
@property
238+
def name(self):
239+
"""
240+
Returns
241+
(shortest) Name of this reference - it may contain path components
242+
"""
243+
# first two path tokens are can be removed as they are
244+
# refs/heads or refs/tags or refs/remotes
245+
tokens = self.path.split('/')
246+
if len(tokens) < 3:
247+
return self.path # could be refs/HEAD
248+
return '/'.join(tokens[2:])
249+
250+
@classmethod
251+
def iter_items(cls, repo, common_path = None, **kwargs):
252+
"""
253+
Find all refs in the repository
254+
255+
``repo``
256+
is the Repo
257+
258+
``common_path``
259+
Optional keyword argument to the path which is to be shared by all
260+
returned Ref objects.
261+
Defaults to class specific portion if None assuring that only
262+
refs suitable for the actual class are returned.
263+
264+
Returns
265+
git.Reference[]
266+
267+
List is lexigraphically sorted
268+
The returned objects represent actual subclasses, such as Head or TagReference
269+
"""
270+
if common_path is None:
271+
common_path = cls._common_path_default
272+
273+
rela_paths = set()
274+
275+
# walk loose refs
276+
# Currently we do not follow links
277+
for root, dirs, files in os.walk(join_path_native(repo.path, common_path)):
278+
for f in files:
279+
abs_path = to_native_path_linux(join_path(root, f))
280+
rela_paths.add(abs_path.replace(to_native_path_linux(repo.path) + '/', ""))
281+
# END for each file in root directory
282+
# END for each directory to walk
283+
284+
# read packed refs
285+
packed_refs_path = join_path_native(repo.path, 'packed-refs')
286+
if os.path.isfile(packed_refs_path):
287+
fp = open(packed_refs_path, 'r')
288+
try:
289+
for line in fp.readlines():
290+
if line.startswith('#'):
291+
continue
292+
# 439689865b9c6e2a0dad61db22a0c9855bacf597 refs/heads/hello
293+
line = line.rstrip()
294+
first_space = line.find(' ')
295+
if first_space == -1:
296+
continue
297+
298+
rela_path = line[first_space+1:]
299+
if rela_path.startswith(common_path):
300+
rela_paths.add(rela_path)
301+
# END relative path matches common path
302+
# END for each line in packed-refs
303+
finally:
304+
fp.close()
305+
# END packed refs reading
306+
307+
# return paths in sorted order
308+
for path in sorted(rela_paths):
309+
if path.endswith('/HEAD'):
310+
continue
311+
# END skip remote heads
312+
yield cls.from_path(repo, path)
313+
# END for each sorted relative refpath
314+
315+
316+
@classmethod
317+
def from_path(cls, repo, path):
318+
"""
319+
Return
320+
Instance of type Reference, Head, or Tag
321+
depending on the given path
322+
"""
323+
if not path:
324+
raise ValueError("Cannot create Reference from %r" % path)
325+
326+
for ref_type in (Head, RemoteReference, TagReference, Reference):
327+
try:
328+
return ref_type(repo, path)
329+
except ValueError:
330+
pass
331+
# END exception handling
332+
# END for each type to try
333+
raise ValueError("Could not find reference type suitable to handle path %r" % path)
334+
359335

360336
class HEAD(SymbolicReference):
361337
"""

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