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
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
|
# Copyright (C) 2009-2010 Gianluca Montecchi <gian@grys.it>
# W. Trevor King <wking@drexel.edu>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""Darcs_ backend.
.. _Darcs: http://darcs.net/
"""
import codecs
import os
import re
import shutil
import sys
import time # work around http://mercurial.selenic.com/bts/issue618
import types
try: # import core module, Python >= 2.5
from xml.etree import ElementTree
except ImportError: # look for non-core module
from elementtree import ElementTree
from xml.sax.saxutils import unescape
import libbe
import base
if libbe.TESTING == True:
import doctest
import unittest
def new():
return Darcs()
class Darcs(base.VCS):
""":class:`base.VCS` implementation for Darcs.
"""
name='darcs'
client='darcs'
def __init__(self, *args, **kwargs):
base.VCS.__init__(self, *args, **kwargs)
self.versioned = True
self.__updated = [] # work around http://mercurial.selenic.com/bts/issue618
def _vcs_version(self):
status,output,error = self._u_invoke_client('--version')
return output.strip()
def version_cmp(self, *args):
"""Compare the installed Darcs version `V_i` with another version
`V_o` (given in `*args`). Returns
=== ===============
1 if `V_i > V_o`
0 if `V_i == V_o`
-1 if `V_i < V_o`
=== ===============
Examples
--------
>>> d = Darcs(repo='.')
>>> d._vcs_version = lambda : "2.3.1 (release)"
>>> d.version_cmp(2,3,1)
0
>>> d.version_cmp(2,3,2)
-1
>>> d.version_cmp(2,3,0)
1
>>> d.version_cmp(3)
-1
>>> d._vcs_version = lambda : "2.0.0pre2"
>>> d._parsed_version = None
>>> d.version_cmp(3)
-1
>>> d.version_cmp(2,0,1)
Traceback (most recent call last):
...
NotImplementedError: Cannot parse non-integer portion "0pre2" of Darcs version "2.0.0pre2"
"""
if not hasattr(self, '_parsed_version') \
or self._parsed_version == None:
num_part = self._vcs_version().split(' ')[0]
self._parsed_version = []
for num in num_part.split('.'):
try:
self._parsed_version.append(int(num))
except ValueError, e:
self._parsed_version.append(num)
for current,other in zip(self._parsed_version, args):
if type(current) != types.IntType:
raise NotImplementedError(
'Cannot parse non-integer portion "%s" of Darcs version "%s"'
% (current, self._vcs_version()))
c = cmp(current,other)
if c != 0:
return c
return 0
def _vcs_get_user_id(self):
# following http://darcs.net/manual/node4.html#SECTION00410030000000000000
# as of June 29th, 2009
if self.repo == None:
return None
darcs_dir = os.path.join(self.repo, '_darcs')
if darcs_dir != None:
for pref_file in ['author', 'email']:
pref_path = os.path.join(darcs_dir, 'prefs', pref_file)
if os.path.exists(pref_path):
return self.get_file_contents(pref_path)
for env_variable in ['DARCS_EMAIL', 'EMAIL']:
if env_variable in os.environ:
return os.environ[env_variable]
return None
def _vcs_detect(self, path):
if self._u_search_parent_directories(path, "_darcs") != None :
return True
return False
def _vcs_root(self, path):
"""Find the root of the deepest repository containing path."""
# Assume that nothing funny is going on; in particular, that we aren't
# dealing with a bare repo.
if os.path.isdir(path) != True:
path = os.path.dirname(path)
darcs_dir = self._u_search_parent_directories(path, '_darcs')
if darcs_dir == None:
return None
return os.path.dirname(darcs_dir)
def _vcs_init(self, path):
self._u_invoke_client('init', cwd=path)
def _vcs_destroy(self):
vcs_dir = os.path.join(self.repo, '_darcs')
if os.path.exists(vcs_dir):
shutil.rmtree(vcs_dir)
def _vcs_add(self, path):
if os.path.isdir(path):
return
self._u_invoke_client('add', path)
def _vcs_remove(self, path):
if not os.path.isdir(self._u_abspath(path)):
os.remove(os.path.join(self.repo, path)) # darcs notices removal
def _vcs_update(self, path):
self.__updated.append(path) # work around http://mercurial.selenic.com/bts/issue618
pass # darcs notices changes
def _vcs_get_file_contents(self, path, revision=None):
if revision == None:
return base.VCS._vcs_get_file_contents(self, path, revision)
if self.version_cmp(2, 0, 0) == 1:
status,output,error = self._u_invoke_client( \
'show', 'contents', '--patch', revision, path)
return output
# Darcs versions < 2.0.0pre2 lack the 'show contents' command
patch = self._diff(revision, path=path, unicode_output=False)
# '--output -' to be supported in GNU patch > 2.5.9
# but that hasn't been released as of June 30th, 2009.
# Rewrite path to status before the patch we want
args=['patch', '--reverse', path]
status,output,error = self._u_invoke(args, stdin=patch)
if os.path.exists(os.path.join(self.repo, path)) == True:
contents = base.VCS._vcs_get_file_contents(self, path)
else:
contents = ''
# Now restore path to it's current incarnation
args=['patch', path]
status,output,error = self._u_invoke(args, stdin=patch)
return contents
def _vcs_path(self, id, revision):
return self._u_find_id(id, revision)
def _vcs_isdir(self, path, revision):
if self.version_cmp(2, 3, 1) == 1:
# Sun Nov 15 20:32:06 EST 2009 thomashartman1@gmail.com
# * add versioned show files functionality (darcs show files -p 'some patch')
status,output,error = self._u_invoke_client( \
'show', 'files', '--no-files', '--patch', revision)
children = output.rstrip('\n').splitlines()
rpath = '.'
children = [self._u_rel_path(c, rpath) for c in children]
if path in children:
return True
return False
raise NotImplementedError(
'Darcs versions <= 2.3.1 lack the --patch option for "show files"')
def _vcs_listdir(self, path, revision):
if self.version_cmp(2, 3, 1) == 1:
# Sun Nov 15 20:32:06 EST 2009 thomashartman1@gmail.com
# * add versioned show files functionality (darcs show files -p 'some patch')
# Wed Dec 9 05:42:21 EST 2009 Luca Molteni <volothamp@gmail.com>
# * resolve issue835 show file with file directory arguments
path = path.rstrip(os.path.sep)
status,output,error = self._u_invoke_client( \
'show', 'files', '--patch', revision, path)
files = output.rstrip('\n').splitlines()
if path == '.':
descendents = [self._u_rel_path(f, path) for f in files
if f != '.']
else:
descendents = [self._u_rel_path(f, path) for f in files
if f.startswith(path)]
return [f for f in descendents if f.count(os.path.sep) == 0]
# Darcs versions <= 2.3.1 lack the --patch option for 'show files'
raise NotImplementedError
def _vcs_commit(self, commitfile, allow_empty=False):
id = self.get_user_id()
if id == None or '@' not in id:
id = '%s <%s@invalid.com>' % (id, id)
args = ['record', '--all', '--author', id, '--logfile', commitfile]
status,output,error = self._u_invoke_client(*args)
empty_strings = ['No changes!']
# work around http://mercurial.selenic.com/bts/issue618
if self._u_any_in_string(empty_strings, output) == True \
and len(self.__updated) > 0:
time.sleep(1)
for path in self.__updated:
os.utime(os.path.join(self.repo, path), None)
status,output,error = self._u_invoke_client(*args)
self.__updated = []
# end work around
if self._u_any_in_string(empty_strings, output) == True:
if allow_empty == False:
raise base.EmptyCommit()
# note that darcs does _not_ make an empty revision.
# this returns the last non-empty revision id...
revision = self._vcs_revision_id(-1)
else:
revline = re.compile("Finished recording patch '(.*)'")
match = revline.search(output)
assert match != None, output+error
assert len(match.groups()) == 1
revision = match.groups()[0]
return revision
def _revisions(self):
"""
Return a list of revisions in the repository.
"""
status,output,error = self._u_invoke_client('changes', '--xml')
revisions = []
xml_str = output.encode('unicode_escape').replace(r'\n', '\n')
element = ElementTree.XML(xml_str)
assert element.tag == 'changelog', element.tag
for patch in element.getchildren():
assert patch.tag == 'patch', patch.tag
for child in patch.getchildren():
if child.tag == 'name':
text = unescape(unicode(child.text).decode('unicode_escape').strip())
revisions.append(text)
revisions.reverse()
return revisions
def _vcs_revision_id(self, index):
revisions = self._revisions()
try:
if index > 0:
return revisions[index-1]
elif index < 0:
return revisions[index]
else:
return None
except IndexError:
return None
def _diff(self, revision, path=None, unicode_output=True):
revisions = self._revisions()
i = revisions.index(revision)
args = ['diff', '--unified']
if i+1 < len(revisions):
next_rev = revisions[i+1]
args.extend(['--from-patch', next_rev])
if path != None:
args.append(path)
kwargs = {'unicode_output':unicode_output}
status,output,error = self._u_invoke_client(
*args, **kwargs)
return output
def _parse_diff(self, diff_text):
"""_parse_diff(diff_text) -> (new,modified,removed)
`new`, `modified`, and `removed` are lists of files.
Example diff text::
Mon Jan 18 15:19:30 EST 2010 None <None@invalid.com>
* Final state
diff -rN --unified old-BEtestgQtDuD/.be/dir/bugs/modified new-BEtestgQtDuD/.be/dir/bugs/modified
--- old-BEtestgQtDuD/.be/dir/bugs/modified 2010-01-18 15:19:30.000000000 -0500
+++ new-BEtestgQtDuD/.be/dir/bugs/modified 2010-01-18 15:19:30.000000000 -0500
@@ -1 +1 @@
-some value to be modified
\ No newline at end of file
+a new value
\ No newline at end of file
diff -rN --unified old-BEtestgQtDuD/.be/dir/bugs/moved new-BEtestgQtDuD/.be/dir/bugs/moved
--- old-BEtestgQtDuD/.be/dir/bugs/moved 2010-01-18 15:19:30.000000000 -0500
+++ new-BEtestgQtDuD/.be/dir/bugs/moved 1969-12-31 19:00:00.000000000 -0500
@@ -1 +0,0 @@
-this entry will be moved
\ No newline at end of file
diff -rN --unified old-BEtestgQtDuD/.be/dir/bugs/moved2 new-BEtestgQtDuD/.be/dir/bugs/moved2
--- old-BEtestgQtDuD/.be/dir/bugs/moved2 1969-12-31 19:00:00.000000000 -0500
+++ new-BEtestgQtDuD/.be/dir/bugs/moved2 2010-01-18 15:19:30.000000000 -0500
@@ -0,0 +1 @@
+this entry will be moved
\ No newline at end of file
diff -rN --unified old-BEtestgQtDuD/.be/dir/bugs/new new-BEtestgQtDuD/.be/dir/bugs/new
--- old-BEtestgQtDuD/.be/dir/bugs/new 1969-12-31 19:00:00.000000000 -0500
+++ new-BEtestgQtDuD/.be/dir/bugs/new 2010-01-18 15:19:30.000000000 -0500
@@ -0,0 +1 @@
+this entry is new
\ No newline at end of file
diff -rN --unified old-BEtestgQtDuD/.be/dir/bugs/removed new-BEtestgQtDuD/.be/dir/bugs/removed
--- old-BEtestgQtDuD/.be/dir/bugs/removed 2010-01-18 15:19:30.000000000 -0500
+++ new-BEtestgQtDuD/.be/dir/bugs/removed 1969-12-31 19:00:00.000000000 -0500
@@ -1 +0,0 @@
-this entry will be deleted
\ No newline at end of file
"""
new = []
modified = []
removed = []
lines = diff_text.splitlines()
repodir = os.path.basename(self.repo) + os.path.sep
i = 0
while i < len(lines):
line = lines[i]; i += 1
if not line.startswith('diff '):
continue
file_a,file_b = line.split()[-2:]
assert file_a.startswith('old-'), \
'missformed file_a %s' % file_a
assert file_b.startswith('new-'), \
'missformed file_a %s' % file_b
file = file_a[4:]
assert file_b[4:] == file, \
'diff file missmatch %s != %s' % (file_a, file_b)
assert file.startswith(repodir), \
'missformed file_a %s' % file_a
file = file[len(repodir):]
lines_added = 0
lines_removed = 0
line = lines[i]; i += 1
assert line.startswith('--- old-'), \
'missformed "---" line %s' % line
time_a = line.split('\t')[1]
line = lines[i]; i += 1
assert line.startswith('+++ new-'), \
'missformed "+++" line %s' % line
time_b = line.split('\t')[1]
zero_time = time.strftime('%Y-%m-%d %H:%M:%S.000000000 ',
time.localtime(0))
# note that zero_time is missing the trailing timezone offset
if time_a.startswith(zero_time):
new.append(file)
elif time_b.startswith(zero_time):
removed.append(file)
else:
modified.append(file)
return (new,modified,removed)
def _vcs_changed(self, revision):
return self._parse_diff(self._diff(revision))
if libbe.TESTING == True:
base.make_vcs_testcase_subclasses(Darcs, sys.modules[__name__])
unitsuite =unittest.TestLoader().loadTestsFromModule(sys.modules[__name__])
suite = unittest.TestSuite([unitsuite, doctest.DocTestSuite()])
|