mirror of
https://github.com/facebook/sapling.git
synced 2024-10-11 09:17:30 +03:00
636 lines
25 KiB
Python
636 lines
25 KiB
Python
import cStringIO
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import cPickle as pickle
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import os
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import sys
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import tempfile
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import traceback
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from mercurial import context
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from mercurial import hg
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from mercurial import ui
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from mercurial import util
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from mercurial import revlog
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from mercurial import node
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from svn import delta
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from svn import core
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import util as our_util
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def pickle_atomic(data, file_path, dir=None):
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"""pickle some data to a path atomically.
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This is present because I kept corrupting my revmap by managing to hit ^C
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during the pickle of that file.
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"""
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try:
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f, path = tempfile.mkstemp(prefix='pickling', dir=dir)
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f = os.fdopen(f, 'w')
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pickle.dump(data, f)
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f.close()
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except:
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raise
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else:
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util.rename(path, file_path)
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def stash_exception_on_self(fn):
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"""Stash any exception raised in the method on self.
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This is required because the SWIG bindings just mutate any exception into
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a generic Subversion exception with no way of telling what the original was.
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This allows the editor object to notice when you try and commit and really
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got an exception in the replay process.
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"""
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def fun(self, *args, **kwargs):
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try:
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return fn(self, *args, **kwargs)
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except:
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if not hasattr(self, '_exception_info'):
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self._exception_info = sys.exc_info()
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raise
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return fun
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class HgChangeReceiver(delta.Editor):
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def add_to_revmap(self, revnum, branch, node_hash):
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f = open(self.revmap_file, 'a')
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f.write(str(revnum) + ' ' + node.hex(node_hash) + ' ' + (branch or '') + '\n')
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f.flush()
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f.close()
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self.revmap[revnum, branch] = node_hash
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def __init__(self, path, ui_=None, subdir='', author_host='',
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tag_locations=['tags']):
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"""path is the path to the target hg repo.
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subdir is the subdirectory of the edits *on the svn server*.
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It is needed for stripping paths off in certain cases.
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"""
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if not ui_:
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ui_ = ui.ui()
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self.ui = ui_
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self.path = path
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self.__setup_repo(path)
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self.subdir = subdir
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if self.subdir and self.subdir[0] == '/':
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self.subdir = self.subdir[1:]
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self.revmap = {}
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if os.path.exists(self.revmap_file):
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self.revmap = our_util.parse_revmap(self.revmap_file)
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self.branches = {}
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if os.path.exists(self.branch_info_file):
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f = open(self.branch_info_file)
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self.branches = pickle.load(f)
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f.close()
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self.tags = {}
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if os.path.exists(self.tag_info_file):
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f = open(self.tag_info_file)
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self.tags = pickle.load(f)
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f.close()
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if os.path.exists(self.tag_locations_file):
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f = open(self.tag_locations_file)
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self.tag_locations = pickle.load(f)
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f.close()
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else:
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self.tag_locations = tag_locations
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pickle_atomic(self.tag_locations, self.tag_locations_file,
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self.meta_data_dir)
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self.clear_current_info()
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self.author_host = author_host
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def __setup_repo(self, repo_path):
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'''Verify the repo is going to work out for us.
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This method will fail an assertion if the repo exists but doesn't have
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the Subversion metadata.
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'''
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if os.path.isdir(repo_path) and len(os.listdir(repo_path)):
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self.repo = hg.repository(self.ui, repo_path)
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assert os.path.isfile(self.revmap_file)
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assert os.path.isfile(self.svn_url_file)
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assert os.path.isfile(self.uuid_file)
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assert os.path.isfile(self.last_revision_handled_file)
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else:
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self.repo = hg.repository(self.ui, repo_path, create=True)
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os.makedirs(os.path.dirname(self.uuid_file))
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f = open(self.revmap_file, 'w')
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f.write('%s\n' % our_util.REVMAP_FILE_VERSION)
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f.flush()
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f.close()
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def clear_current_info(self):
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'''Clear the info relevant to a replayed revision so that the next
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revision can be replayed.
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'''
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self.current_files = {}
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self.deleted_files = {}
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self.current_rev = None
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self.current_files_exec = {}
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self.current_files_symlink = {}
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self.missing_plaintexts = set()
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self.commit_branches_empty = {}
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self.base_revision = None
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def _save_metadata(self):
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'''Save the Subversion metadata. This should really be called after
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every revision is created.
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'''
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pickle_atomic(self.branches, self.branch_info_file, self.meta_data_dir)
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pickle_atomic(self.tags, self.tag_info_file, self.meta_data_dir)
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def branches_in_paths(self, paths):
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'''Given a list of paths, return the set of branches that are touched.
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'''
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branches = set([])
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for p in paths:
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if self._is_path_valid(p):
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junk, branch = self._path_and_branch_for_path(p)
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branches.add(branch)
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return branches
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def _path_and_branch_for_path(self, path):
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'''Figure out which branch inside our repo this path represents, and
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also figure out which path inside that branch it is.
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Raises an exception if it can't perform its job.
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'''
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path = self._normalize_path(path)
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if path.startswith('trunk'):
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p = path[len('trunk'):]
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if p and p[0] == '/':
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p = p[1:]
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return p, None
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elif path.startswith('branches/'):
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p = path[len('branches/'):]
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br = p.split('/')[0]
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p = p[len(br)+1:]
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if p and p[0] == '/':
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p = p[1:]
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return p, br
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return None, None
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raise Exception,'Things went boom: ' + path
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def set_current_rev(self, rev):
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'''Set the revision we're currently converting.
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'''
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self.current_rev = rev
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def _normalize_path(self, path):
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'''Normalize a path to strip of leading slashes and our subdir if we
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have one.
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'''
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if path and path[0] == '/':
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path = path[1:]
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if path and path.startswith(self.subdir):
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path = path[len(self.subdir):]
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if path and path[0] == '/':
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path = path[1:]
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return path
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def _is_path_valid(self, path):
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path = self._normalize_path(path)
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if path.startswith('trunk'):
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return True
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elif path.startswith('branches/'):
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br = path.split('/')[1]
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return len(br) > 0
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return False
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def _is_path_tag(self, path):
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"""If path represents the path to a tag, returns the tag name.
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Otherwise, returns False.
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"""
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path = self._normalize_path(path)
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for tags_path in self.tag_locations:
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if path and (path.startswith(tags_path) and
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len(path) > len('%s/' % tags_path)):
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return path[len(tags_path)+1:].split('/')[0]
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return False
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def get_parent_svn_branch_and_rev(self, number, branch):
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number -= 1
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if (number, branch) in self.revmap:
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return number, branch
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real_num = 0
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for num, br in self.revmap.iterkeys():
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if br != branch:
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continue
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if num <= number and num > real_num:
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real_num = num
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if real_num == 0:
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if branch in self.branches:
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parent_branch = self.branches[branch][0]
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parent_branch_rev = self.branches[branch][1]
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branch_created_rev = self.branches[branch][2]
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if parent_branch == 'trunk':
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parent_branch = None
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if branch_created_rev <= number+1 and branch != parent_branch:
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return self.get_parent_svn_branch_and_rev(
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parent_branch_rev+1,
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parent_branch)
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if real_num != 0:
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return real_num, branch
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return None, None
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def get_parent_revision(self, number, branch):
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'''Get the parent revision hash for a commit on a specific branch.
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'''
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r, br = self.get_parent_svn_branch_and_rev(number, branch)
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if r is not None:
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return self.revmap[r, br]
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return revlog.nullid
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def update_branch_tag_map_for_rev(self, revision):
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paths = revision.paths
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added_branches = {}
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added_tags = {}
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tags_to_delete = set()
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for p in paths:
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if self._is_path_valid(p):
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fi, br = self._path_and_branch_for_path(p)
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if fi == '' and br not in self.branches:
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# TODO handle creating a branch from a tag
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src_p = paths[p].copyfrom_path
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src_rev = paths[p].copyfrom_rev
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src_tag = self._is_path_tag(src_p)
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if not src_p or not (self._is_path_valid(src_p) or src_tag):
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# we'll imply you're a branch off of trunk
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# if you have no path, but if you do, it must be valid
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# or else we assume trunk as well
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src_branch = None
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src_rev = revision.revnum
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elif src_tag:
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# this is a branch created from a tag. Note that this
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# really does happen (see Django)
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src_branch, src_rev = self.tags[src_tag]
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added_branches[br] = (src_branch, src_rev,
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revision.revnum)
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else:
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# Not from a tag, and from a valid repo path
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(src_p,
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src_branch) = self._path_and_branch_for_path(src_p)
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added_branches[br] = src_branch, src_rev, revision.revnum
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elif br in added_branches:
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if paths[p].copyfrom_rev > added_branches[br][1]:
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x,y,z = added_branches[br]
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added_branches[br] = x, paths[p].copyfrom_rev, z
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else:
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t_name = self._is_path_tag(p)
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if t_name == False:
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continue
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src_p, src_rev = paths[p].copyfrom_path, paths[p].copyfrom_rev
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# if you commit to a tag, I'm calling you stupid and ignoring
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# you.
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if src_p is not None and src_rev is not None:
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if self._is_path_valid(src_p):
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file, branch = self._path_and_branch_for_path(src_p)
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else:
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# some crazy people make tags from other tags
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file = ''
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from_tag = self._is_path_tag(src_p)
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if not from_tag:
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continue
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branch, src_rev = self.tags[from_tag]
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if t_name not in added_tags:
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added_tags[t_name] = branch, src_rev
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elif file and src_rev > added_tags[t_name][1]:
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added_tags[t_name] = branch, src_rev
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elif (paths[p].action == 'D' and p.endswith(t_name)
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and t_name in self.tags):
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tags_to_delete.add(t_name)
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for t in tags_to_delete:
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del self.tags[t]
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self.tags.update(added_tags)
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self.branches.update(added_branches)
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self._save_metadata()
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def commit_current_delta(self):
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if hasattr(self, '_exception_info'):
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traceback.print_exception(*self._exception_info)
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raise ReplayException()
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if self.missing_plaintexts:
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raise MissingPlainTextError()
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files_to_commit = self.current_files.keys()
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files_to_commit.extend(self.current_files_symlink.keys())
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files_to_commit.extend(self.current_files_exec.keys())
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files_to_commit = sorted(list(set(files_to_commit)))
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branch_batches = {}
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rev = self.current_rev
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date = rev.date.replace('T', ' ').replace('Z', '').split('.')[0]
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date += ' -0000'
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# build up the branches that have files on them
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for f in files_to_commit:
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if not self._is_path_valid(f):
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continue
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p, b = self._path_and_branch_for_path(f)
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if b not in branch_batches:
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branch_batches[b] = []
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branch_batches[b].append((p, f))
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for branch, files in branch_batches.iteritems():
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if branch in self.commit_branches_empty and files:
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del self.commit_branches_empty[branch]
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extra = {}
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files = dict(files)
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parents = (self.get_parent_revision(rev.revnum, branch),
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revlog.nullid)
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if branch is not None:
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if branch not in self.branches:
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continue
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if parents == (revlog.nullid, revlog.nullid):
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assert False, ('a non-trunk branch should probably have'
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' parents figured out by this point')
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extra['branch'] = branch
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parent_ctx = self.repo.changectx(parents[0])
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def filectxfn(repo, memctx, path):
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is_link = False
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is_exec = False
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copied = None
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current_file = files[path]
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if current_file in self.deleted_files:
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raise IOError()
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# TODO(augie) tag copies from files
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if path in parent_ctx:
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is_exec = 'x' in parent_ctx.flags(path)
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is_link = 'l' in parent_ctx.flags(path)
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if current_file in self.current_files_exec:
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is_exec = self.current_files_exec[current_file]
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if current_file in self.current_files_symlink:
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is_link = self.current_files_symlink[current_file]
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if current_file in self.current_files:
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data = self.current_files[current_file]
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if is_link:
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assert data.startswith('link ')
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data = data[len('link '):]
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else:
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data = parent_ctx.filectx(path).data()
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return context.memfilectx(path=path,
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data=data,
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islink=is_link, isexec=is_exec,
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copied=copied)
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current_ctx = context.memctx(self.repo,
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parents,
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rev.message or '...',
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files.keys(),
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filectxfn,
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'%s%s' %(rev.author, self.author_host),
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date,
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extra)
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new_hash = self.repo.commitctx(current_ctx)
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self.ui.status('committed as %s on branch %s\n' %
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(node.hex(new_hash), (branch or 'default')))
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if (rev.revnum, branch) not in self.revmap:
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self.add_to_revmap(rev.revnum, branch, new_hash)
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# now we handle branches that need to be committed without any files
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for branch in self.commit_branches_empty:
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ha = self.get_parent_revision(rev.revnum, branch)
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if ha == node.nullid:
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continue
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parent_ctx = self.repo.changectx(ha)
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def del_all_files(*args):
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raise IOError
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extra = {}
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if branch:
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extra['branch'] = branch
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# True here means nuke all files
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files = []
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if self.commit_branches_empty[branch]:
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files = parent_ctx.manifest().keys()
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current_ctx = context.memctx(self.repo,
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(ha, node.nullid),
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rev.message or ' ',
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files,
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del_all_files,
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'%s%s' % (rev.author,
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self.author_host),
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date,
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extra)
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new_hash = self.repo.commitctx(current_ctx)
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self.ui.status('committed as %s on branch %s\n' %
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(node.hex(new_hash), (branch or 'default')))
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if (rev.revnum, branch) not in self.revmap:
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self.add_to_revmap(rev.revnum, branch, new_hash)
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self.clear_current_info()
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@property
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def meta_data_dir(self):
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return os.path.join(self.path, '.hg', 'svn')
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def meta_file_named(self, name):
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return os.path.join(self.meta_data_dir, name)
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@property
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def revmap_file(self):
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return self.meta_file_named('rev_map')
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@property
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def svn_url_file(self):
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return self.meta_file_named('url')
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@property
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def uuid_file(self):
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return self.meta_file_named('uuid')
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@property
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def last_revision_handled_file(self):
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return self.meta_file_named('last_rev')
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@property
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def branch_info_file(self):
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return self.meta_file_named('branch_info')
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@property
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def tag_info_file(self):
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return self.meta_file_named('tag_info')
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@property
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def tag_locations_file(self):
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return self.meta_file_named('tag_locations')
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@property
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def url(self):
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return open(self.svn_url_file).read()
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@stash_exception_on_self
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def delete_entry(self, path, revision_bogus, parent_baton, pool=None):
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if self._is_path_valid(path):
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br_path, branch = self._path_and_branch_for_path(path)
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ha = self.get_parent_revision(self.current_rev.revnum, branch)
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if ha == revlog.nullid:
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return
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ctx = self.repo.changectx(ha)
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if br_path not in ctx:
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br_path2 = ''
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if br_path != '':
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br_path2 = br_path + '/'
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# assuming it is a directory
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def delete_x(x):
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self.deleted_files[x] = True
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map(delete_x, [pat for pat in self.current_files.iterkeys()
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if pat.startswith(path)])
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for f in ctx.walk(our_util.PrefixMatch(br_path2)):
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f_p = '%s/%s' % (path, f[len(br_path2):])
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if f_p not in self.current_files:
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self.deleted_files[f_p] = True
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self.current_files[f_p] = ''
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self.ui.status('D %s\n' % f_p)
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self.deleted_files[path] = True
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self.current_files[path] = ''
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|
self.ui.status('D %s\n' % path)
|
|
|
|
@stash_exception_on_self
|
|
def open_file(self, path, parent_baton, base_revision, p=None):
|
|
self.current_file = 'foobaz'
|
|
if self._is_path_valid(path):
|
|
self.current_file = path
|
|
self.ui.status('M %s\n' % path)
|
|
if base_revision != -1:
|
|
self.base_revision = base_revision
|
|
else:
|
|
self.base_revision = None
|
|
self.should_edit_most_recent_plaintext = True
|
|
|
|
@stash_exception_on_self
|
|
def add_file(self, path, parent_baton, copyfrom_path,
|
|
copyfrom_revision, file_pool=None):
|
|
self.current_file = 'foobaz'
|
|
self.base_revision = None
|
|
if path in self.deleted_files:
|
|
del self.deleted_files[path]
|
|
if (self._is_path_valid(path) and
|
|
self._path_and_branch_for_path(path)[0]):
|
|
self.current_file = path
|
|
self.should_edit_most_recent_plaintext = False
|
|
if copyfrom_path:
|
|
self.ui.status('A+ %s\n' % path)
|
|
# TODO(augie) handle this better, actually mark a copy
|
|
(from_file,
|
|
from_branch) = self._path_and_branch_for_path(copyfrom_path)
|
|
ha = self.get_parent_revision(copyfrom_revision + 1,
|
|
from_branch)
|
|
ctx = self.repo.changectx(ha)
|
|
if from_file in ctx:
|
|
fctx = ctx.filectx(from_file)
|
|
cur_file = self.current_file
|
|
self.current_files[cur_file] = fctx.data()
|
|
self.current_files_symlink[cur_file] = 'l' in fctx.flags()
|
|
self.current_files_exec[cur_file] = 'x' in fctx.flags()
|
|
else:
|
|
self.ui.status('A %s\n' % path)
|
|
|
|
|
|
@stash_exception_on_self
|
|
def add_directory(self, path, parent_baton, copyfrom_path,
|
|
copyfrom_revision, dir_pool=None):
|
|
if self._is_path_valid(path):
|
|
junk, branch = self._path_and_branch_for_path(path)
|
|
if not copyfrom_path and not junk:
|
|
self.commit_branches_empty[branch] = True
|
|
else:
|
|
self.commit_branches_empty[branch] = False
|
|
if not self._is_path_valid(path) or not copyfrom_path:
|
|
return
|
|
if copyfrom_path and not self._is_path_valid(copyfrom_path):
|
|
self.missing_plaintexts.add('%s/' % path)
|
|
return
|
|
|
|
cp_f, br_from = self._path_and_branch_for_path(copyfrom_path)
|
|
new_hash = self.get_parent_revision(copyfrom_revision + 1, br_from)
|
|
if new_hash == node.nullid:
|
|
self.missing_plaintexts.add('%s/' % path)
|
|
return
|
|
cp_f_ctx = self.repo.changectx(new_hash)
|
|
if cp_f != '/' and cp_f != '':
|
|
cp_f = '%s/' % cp_f
|
|
else:
|
|
cp_f = ''
|
|
for f in cp_f_ctx:
|
|
if f.startswith(cp_f):
|
|
f2 = f[len(cp_f):]
|
|
fctx = cp_f_ctx.filectx(f)
|
|
fp_c = path + '/' + f2
|
|
self.current_files[fp_c] = fctx.data()
|
|
self.current_files_exec[fp_c] = 'x' in fctx.flags()
|
|
self.current_files_symlink[fp_c] = 'l' in fctx.flags()
|
|
if fp_c in self.deleted_files:
|
|
del self.deleted_files[fp_c]
|
|
# TODO(augie) tag copies from files
|
|
|
|
@stash_exception_on_self
|
|
def change_file_prop(self, file_baton, name, value, pool=None):
|
|
if name == 'svn:executable':
|
|
self.current_files_exec[self.current_file] = bool(value)
|
|
elif name == 'svn:special':
|
|
self.current_files_symlink[self.current_file] = bool(value)
|
|
|
|
@stash_exception_on_self
|
|
def open_directory(self, path, parent_baton, base_revision, dir_pool=None):
|
|
if self._is_path_valid(path):
|
|
p_, branch = self._path_and_branch_for_path(path)
|
|
if p_ == '':
|
|
self.commit_branches_empty[branch] = False
|
|
|
|
@stash_exception_on_self
|
|
def apply_textdelta(self, file_baton, base_checksum, pool=None):
|
|
base = ''
|
|
if not self._is_path_valid(self.current_file):
|
|
return lambda x: None
|
|
if (self.current_file in self.current_files
|
|
and not self.should_edit_most_recent_plaintext):
|
|
base = self.current_files[self.current_file]
|
|
elif (base_checksum is not None or
|
|
self.should_edit_most_recent_plaintext):
|
|
p_, br = self._path_and_branch_for_path(self.current_file)
|
|
par_rev = self.current_rev.revnum
|
|
if self.base_revision:
|
|
par_rev = self.base_revision + 1
|
|
ha = self.get_parent_revision(par_rev, br)
|
|
if ha != revlog.nullid:
|
|
ctx = self.repo.changectx(ha)
|
|
if not p_ in ctx:
|
|
self.missing_plaintexts.add(self.current_file)
|
|
# short circuit exit since we can't do anything anyway
|
|
return lambda x: None
|
|
base = ctx.filectx(p_).data()
|
|
source = cStringIO.StringIO(base)
|
|
target = cStringIO.StringIO()
|
|
self.stream = target
|
|
|
|
handler, baton = delta.svn_txdelta_apply(source, target, None)
|
|
if not callable(handler):
|
|
# TODO(augie) Raise a real exception, don't just fail an assertion.
|
|
assert False, 'handler not callable, bindings are broken'
|
|
def txdelt_window(window):
|
|
try:
|
|
if not self._is_path_valid(self.current_file):
|
|
return
|
|
handler(window, baton)
|
|
# window being None means commit this file
|
|
if not window:
|
|
self.current_files[self.current_file] = target.getvalue()
|
|
except core.SubversionException, e:
|
|
if e.message == 'Delta source ended unexpectedly':
|
|
self.missing_plaintexts.add(self.current_file)
|
|
else:
|
|
self._exception_info = sys.exc_info()
|
|
raise
|
|
except:
|
|
print len(base), self.current_file
|
|
self._exception_info = sys.exc_info()
|
|
raise
|
|
return txdelt_window
|
|
|
|
class MissingPlainTextError(Exception):
|
|
"""Exception raised when the repo lacks a source file required for replaying
|
|
a txdelta.
|
|
"""
|
|
|
|
class ReplayException(Exception):
|
|
"""Exception raised when you try and commit but the replay encountered an
|
|
exception.
|
|
"""
|