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-rw-r--r--libbe/darcs.py192
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diff --git a/libbe/darcs.py b/libbe/darcs.py
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-# Copyright (C) 2009 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.
-"""
-
-import codecs
-import os
-import re
-import sys
-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 vcs
-if libbe.TESTING == True:
- import doctest
- import unittest
-
-
-def new():
- return Darcs()
-
-class Darcs(vcs.VCS):
- name="darcs"
- client="darcs"
- versioned=True
- def _vcs_version(self):
- status,output,error = self._u_invoke_client("--version")
- num_part = output.split(" ")[0]
- self.parsed_version = [int(i) for i in num_part.split(".")]
- return output
- 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_get_user_id(self):
- # following http://darcs.net/manual/node4.html#SECTION00410030000000000000
- # as of June 29th, 2009
- if self.rootdir == None:
- return None
- darcs_dir = os.path.join(self.rootdir, "_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_set_user_id(self, value):
- if self.rootdir == None:
- self.root(".")
- if self.rootdir == None:
- raise vcs.SettingIDnotSupported
- author_path = os.path.join(self.rootdir, "_darcs", "prefs", "author")
- f = codecs.open(author_path, "w", self.encoding)
- f.write(value)
- f.close()
- 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.rootdir, path)) # darcs notices removal
- def _vcs_update(self, path):
- pass # darcs notices changes
- def _vcs_get_file_contents(self, path, revision=None, binary=False):
- if revision == None:
- return vcs.VCS._vcs_get_file_contents(self, path, revision,
- binary=binary)
- else:
- if self.parsed_version[0] >= 2:
- status,output,error = self._u_invoke_client( \
- "show", "contents", "--patch", revision, path)
- return output
- else:
- # Darcs versions < 2.0.0pre2 lack the "show contents" command
-
- status,output,error = self._u_invoke_client( \
- "diff", "--unified", "--from-patch", revision, path,
- unicode_output=False)
- major_patch = output
- status,output,error = self._u_invoke_client( \
- "diff", "--unified", "--patch", revision, path,
- unicode_output=False)
- target_patch = output
-
- # "--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=major_patch)
- # Now apply the patch we want
- args=["patch", path]
- status,output,error = self._u_invoke(args, stdin=target_patch)
-
- if os.path.exists(os.path.join(self.rootdir, path)) == True:
- contents = vcs.VCS._vcs_get_file_contents(self, path,
- binary=binary)
- else:
- contents = ""
-
- # Now restore path to it's current incarnation
- args=["patch", "--reverse", path]
- status,output,error = self._u_invoke(args, stdin=target_patch)
- args=["patch", path]
- status,output,error = self._u_invoke(args, stdin=major_patch)
- current_contents = vcs.VCS._vcs_get_file_contents(self, path,
- binary=binary)
- return contents
- def _vcs_duplicate_repo(self, directory, revision=None):
- if revision==None:
- vcs.VCS._vcs_duplicate_repo(self, directory, revision)
- else:
- self._u_invoke_client("put", "--to-patch", revision, directory)
- def _vcs_commit(self, commitfile, allow_empty=False):
- id = self.get_user_id()
- if '@' 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!"]
- if self._u_any_in_string(empty_strings, output) == True:
- if allow_empty == False:
- raise vcs.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 _vcs_revision_id(self, index):
- 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()
- try:
- return revisions[index]
- except IndexError:
- return None
-
-if libbe.TESTING == True:
- vcs.make_vcs_testcase_subclasses(Darcs, sys.modules[__name__])
-
- unitsuite =unittest.TestLoader().loadTestsFromModule(sys.modules[__name__])
- suite = unittest.TestSuite([unitsuite, doctest.DocTestSuite()])