mirror of
https://github.com/facebook/sapling.git
synced 2024-10-10 16:57:49 +03:00
648 lines
23 KiB
Python
648 lines
23 KiB
Python
import os, errno, sys, time, datetime, pickle, copy, math
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import toposort
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import dulwich
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from dulwich.repo import Repo
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from dulwich.client import SimpleFetchGraphWalker
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from hgext import bookmarks
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from mercurial.i18n import _
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from mercurial.node import bin, hex, nullid
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from mercurial import hg, util, context, error
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from dulwich.objects import (
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Blob,
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Commit,
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ShaFile,
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Tag,
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Tree,
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hex_to_sha,
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format_timezone,
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)
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import math
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def seconds_to_offset(time):
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hours = (float(time) / 60 / 60)
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hour_diff = math.fmod(time, 60)
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minutes = int(hour_diff)
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hours = int(math.floor(hours))
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if hours > 12:
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sign = '+'
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hours = 12 - (hours - 12)
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elif hours > 0:
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sign = '-'
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else:
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sign = ''
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return sign + str(hours).rjust(2, '0') + str(minutes).rjust(2, '0')
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def offset_to_seconds(offset):
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if len(offset) == 5:
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sign = offset[0:1]
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hours = int(offset[1:3])
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minutes = int(offset[3:5])
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if sign == '+':
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hours = 12 + (12 - hours)
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return (hours * 60 * 60) + (minutes) * 60
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else:
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return 0
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class GitHandler(object):
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def __init__(self, dest_repo, ui):
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self.repo = dest_repo
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self.ui = ui
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self.mapfile = 'git-mapfile'
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self.configfile = 'git-config'
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self.gitdir = self.repo.join('git')
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self.init_if_missing()
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self.load_git()
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self.load_map()
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self.load_config()
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# make the git data directory
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def init_if_missing(self):
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if not os.path.exists(self.gitdir):
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os.mkdir(self.gitdir)
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Repo.init_bare(self.gitdir)
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def load_git(self):
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self.git = Repo(self.gitdir)
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## FILE LOAD AND SAVE METHODS
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def map_set(self, gitsha, hgsha):
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self._map_git[gitsha] = hgsha
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self._map_hg[hgsha] = gitsha
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def map_hg_get(self, gitsha):
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return self._map_git.get(gitsha)
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def map_git_get(self, hgsha):
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return self._map_hg.get(hgsha)
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def load_map(self):
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self._map_git = {}
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self._map_hg = {}
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if os.path.exists(self.repo.join(self.mapfile)):
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for line in self.repo.opener(self.mapfile):
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gitsha, hgsha = line.strip().split(' ', 1)
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self._map_git[gitsha] = hgsha
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self._map_hg[hgsha] = gitsha
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def save_map(self):
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file = self.repo.opener(self.mapfile, 'w+', atomictemp=True)
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for gitsha, hgsha in sorted(self._map_git.iteritems()):
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file.write("%s %s\n" % (gitsha, hgsha))
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file.rename()
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def load_config(self):
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self._config = {}
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if os.path.exists(self.repo.join(self.configfile)):
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for line in self.repo.opener(self.configfile):
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key, value = line.strip().split(' ', 1)
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self._config[key] = value
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def save_config(self):
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file = self.repo.opener(self.configfile, 'w+', atomictemp=True)
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for key, value in self._config.iteritems():
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file.write("%s %s\n" % (key, value))
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file.rename()
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## END FILE LOAD AND SAVE METHODS
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def fetch(self, remote_name):
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self.ui.status(_("fetching from : %s\n") % remote_name)
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self.export_git_objects()
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refs = self.fetch_pack(remote_name)
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if refs:
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self.import_git_objects(remote_name)
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self.save_map()
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def export(self):
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self.export_git_objects()
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self.update_references()
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self.save_map()
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def push(self, remote_name):
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self.ui.status(_("pushing to : %s\n") % remote_name)
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self.export()
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self.upload_pack(remote_name)
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def remote_add(self, remote_name, git_url):
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self._config['remote.' + remote_name + '.url'] = git_url
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self.save_config()
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def remote_remove(self, remote_name):
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key = 'remote.' + remote_name + '.url'
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if key in self._config:
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del self._config[key]
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self.save_config()
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def remote_show(self, remote_name):
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key = 'remote.' + remote_name + '.url'
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if key in self._config:
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name = self._config[key]
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self.ui.status(_("URL for %s : %s\n") % (remote_name, name, ))
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else:
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self.ui.status(_("No remote named : %s\n") % remote_name)
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return
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def remote_list(self):
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for key, value in self._config.iteritems():
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if key[0:6] == 'remote':
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self.ui.status('%s\t%s\n' % (key, value, ))
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def remote_name_to_url(self, remote_name):
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return self._config['remote.' + remote_name + '.url']
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def update_references(self):
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# TODO : if bookmarks exist, add them as git branches
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c = self.map_git_get(hex(self.repo.changelog.tip()))
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self.git.set_ref('refs/heads/master', c)
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def export_git_objects(self):
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self.ui.status(_("exporting git objects\n"))
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total = len(self.repo.changelog)
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magnitude = int(math.log(total, 10)) + 1 if total else 1
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for i, rev in enumerate(self.repo.changelog):
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if i%100 == 0:
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self.ui.status(_("at: %*d/%d\n") % (magnitude, i, total))
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pgit_sha, already_written = self.export_hg_commit(rev)
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if not already_written:
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self.save_map()
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# convert this commit into git objects
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# go through the manifest, convert all blobs/trees we don't have
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# write the commit object (with metadata info)
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def export_hg_commit(self, rev):
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# return if we've already processed this
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node = self.repo.changelog.lookup(rev)
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phgsha = hex(node)
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pgit_sha = self.map_git_get(phgsha)
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if pgit_sha:
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return pgit_sha, True
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self.ui.status(_("converting revision %s\n") % str(rev))
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# make sure parents are converted first
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parents = self.repo.parents(rev)
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for parent in parents:
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p_rev = parent.rev()
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hgsha = hex(parent.node())
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git_sha = self.map_git_get(hgsha)
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if not p_rev == -1:
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if not git_sha:
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self.export_hg_commit(p_rev)
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ctx = self.repo.changectx(rev)
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tree_sha, renames = self.write_git_tree(ctx)
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commit = {}
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commit['tree'] = tree_sha
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(time, timezone) = ctx.date()
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# hg authors might not have emails
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author = ctx.user()
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if not '>' in author: # TODO : this kills losslessness - die (submodules)?
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author = author + ' <none@none>'
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commit['author'] = author + ' ' + str(int(time)) + ' ' + format_timezone(-timezone)
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message = ctx.description()
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commit['message'] = ctx.description() + "\n"
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extra = ctx.extra()
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if 'committer' in extra:
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# fixup timezone
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(name_timestamp, timezone) = extra['committer'].rsplit(' ', 1)
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timezone = format_timezone(-int(timezone))
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commit['committer'] = '%s %s' % (name_timestamp, timezone)
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if 'encoding' in extra:
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commit['encoding'] = extra['encoding']
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# HG EXTRA INFORMATION
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add_extras = False
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extra_message = ''
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if not ctx.branch() == 'default':
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add_extras = True
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extra_message += "branch : " + ctx.branch() + "\n"
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if renames:
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add_extras = True
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for oldfile, newfile in renames:
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extra_message += "rename : " + oldfile + " => " + newfile + "\n"
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if add_extras:
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commit['message'] += "\n--HG--\n" + extra_message
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commit['parents'] = []
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for parent in parents:
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hgsha = hex(parent.node())
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git_sha = self.map_git_get(hgsha)
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if git_sha:
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commit['parents'].append(git_sha)
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commit_sha = self.git.write_commit_hash(commit) # writing new blobs to git
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self.map_set(commit_sha, phgsha)
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return commit_sha, False
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def write_git_tree(self, ctx):
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trees = {}
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man = ctx.manifest()
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renames = []
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for filenm in man.keys():
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# write blob if not in our git database
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fctx = ctx.filectx(filenm)
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rename = fctx.renamed()
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if rename:
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filerename, sha = rename
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renames.append((filerename, filenm))
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is_exec = 'x' in fctx.flags()
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is_link = 'l' in fctx.flags()
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file_id = hex(fctx.filenode())
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blob_sha = self.map_git_get(file_id)
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if not blob_sha:
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blob_sha = self.git.write_blob(fctx.data()) # writing new blobs to git
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self.map_set(blob_sha, file_id)
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parts = filenm.split('/')
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if len(parts) > 1:
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# get filename and path for leading subdir
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filepath = parts[-1:][0]
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dirpath = "/".join([v for v in parts[0:-1]]) + '/'
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# get subdir name and path for parent dir
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parpath = '/'
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nparpath = '/'
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for part in parts[0:-1]:
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if nparpath == '/':
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nparpath = part + '/'
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else:
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nparpath += part + '/'
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treeentry = ['tree', part + '/', nparpath]
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if parpath not in trees:
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trees[parpath] = []
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if treeentry not in trees[parpath]:
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trees[parpath].append( treeentry )
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parpath = nparpath
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# set file entry
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fileentry = ['blob', filepath, blob_sha, is_exec, is_link]
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if dirpath not in trees:
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trees[dirpath] = []
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trees[dirpath].append(fileentry)
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else:
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fileentry = ['blob', parts[0], blob_sha, is_exec, is_link]
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if '/' not in trees:
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trees['/'] = []
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trees['/'].append(fileentry)
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# sort by tree depth, so we write the deepest trees first
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dirs = trees.keys()
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dirs.sort(lambda a, b: len(b.split('/'))-len(a.split('/')))
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dirs.remove('/')
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dirs.append('/')
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# write all the trees
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tree_sha = None
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tree_shas = {}
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for dirnm in dirs:
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tree_data = []
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for entry in trees[dirnm]:
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# replace tree path with tree SHA
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if entry[0] == 'tree':
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sha = tree_shas[entry[2]]
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entry[2] = sha
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tree_data.append(entry)
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tree_sha = self.git.write_tree_array(tree_data) # writing new trees to git
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tree_shas[dirnm] = tree_sha
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return (tree_sha, renames) # should be the last root tree sha
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def remote_head(self, remote_name):
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for head, sha in self.git.remote_refs(remote_name).iteritems():
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if head == 'HEAD':
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return self.map_hg_get(sha)
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return None
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def upload_pack(self, remote_name):
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git_url = self.remote_name_to_url(remote_name)
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client, path = self.get_transport_and_path(git_url)
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changed = self.get_changed_refs
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genpack = self.generate_pack_contents
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try:
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self.ui.status(_("creating and sending data\n"))
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changed_refs = client.send_pack(path, changed, genpack)
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if changed_refs:
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new_refs = {}
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for ref, sha in changed_refs.iteritems():
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self.ui.status(" "+ remote_name + "::" + ref + " => GIT:" + sha[0:8] + "\n")
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new_refs[ref] = sha
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self.git.set_remote_refs(new_refs, remote_name)
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self.update_hg_bookmarks(remote_name)
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except:
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# TODO : remove try/except or do something useful here
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raise
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# TODO : for now, we'll just push all heads that match remote heads
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# * we should have specified push, tracking branches and --all
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# takes a dict of refs:shas from the server and returns what should be
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# pushed up
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def get_changed_refs(self, refs):
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keys = refs.keys()
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changed = {}
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if not keys:
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return None
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# TODO : this is a huge hack
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if keys[0] == 'capabilities^{}': # nothing on the server yet - first push
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changed['refs/heads/master'] = self.git.ref('master')
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for ref_name in keys:
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parts = ref_name.split('/')
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if parts[0] == 'refs': # strip off 'refs/heads'
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if parts[1] == 'heads':
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head = "/".join([v for v in parts[2:]])
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local_ref = self.git.ref(ref_name)
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if local_ref:
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if not local_ref == refs[ref_name]:
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changed[ref_name] = local_ref
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return changed
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# takes a list of shas the server wants and shas the server has
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# and generates a list of commit shas we need to push up
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def generate_pack_contents(self, want, have):
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graph_walker = SimpleFetchGraphWalker(want, self.git.get_parents)
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next = graph_walker.next()
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shas = set()
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while next:
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if next in have:
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graph_walker.ack(next)
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else:
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shas.add(next)
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next = graph_walker.next()
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seen = []
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# so now i have the shas, need to turn them into a list of
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# tuples (sha, path) for ALL the objects i'm sending
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# TODO : don't send blobs or trees they already have
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def get_objects(tree, path):
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changes = list()
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changes.append((tree, path))
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for (mode, name, sha) in tree.entries():
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if mode == 57344: # TODO : properly handle submodules and document what 57344 means
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continue
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if sha in seen:
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continue
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obj = self.git.get_object(sha)
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seen.append(sha)
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if isinstance (obj, Blob):
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changes.append((obj, path + name))
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elif isinstance(obj, Tree):
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changes.extend(get_objects(obj, path + name + '/'))
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return changes
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objects = []
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for commit_sha in shas:
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commit = self.git.commit(commit_sha)
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objects.append((commit, 'commit'))
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tree = self.git.get_object(commit.tree)
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objects.extend( get_objects(tree, '/') )
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return objects
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def fetch_pack(self, remote_name):
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git_url = self.remote_name_to_url(remote_name)
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client, path = self.get_transport_and_path(git_url)
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graphwalker = SimpleFetchGraphWalker(self.git.heads().values(), self.git.get_parents)
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f, commit = self.git.object_store.add_pack()
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try:
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determine_wants = self.git.object_store.determine_wants_all
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refs = client.fetch_pack(path, determine_wants, graphwalker, f.write, sys.stdout.write)
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f.close()
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commit()
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if refs:
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self.git.set_remote_refs(refs, remote_name)
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else:
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self.ui.status(_("nothing new on the server\n"))
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return refs
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except:
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f.close()
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raise
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def import_git_objects(self, remote_name):
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self.ui.status(_("importing Git objects into Hg\n"))
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# import heads as remote references
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todo = []
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done = set()
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convert_list = {}
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self.renames = {}
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# get a list of all the head shas
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for head, sha in self.git.remote_refs(remote_name).iteritems():
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todo.append(sha)
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# traverse the heads getting a list of all the unique commits
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while todo:
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sha = todo.pop()
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assert isinstance(sha, str)
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if sha in done:
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continue
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done.add(sha)
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try:
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commit = self.git.commit(sha)
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convert_list[sha] = commit
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todo.extend([p for p in commit.parents if p not in done])
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except:
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self.ui.warn(_("Cannot import tags yet\n")) # TODO
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# sort the commits
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commits = toposort.TopoSort(convert_list).items()
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# import each of the commits, oldest first
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for csha in commits:
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commit = convert_list[csha]
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if not self.map_hg_get(csha): # it's already here
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self.import_git_commit(commit)
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else:
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self.pseudo_import_git_commit(commit)
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self.update_hg_bookmarks(remote_name)
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def update_hg_bookmarks(self, remote_name):
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try:
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bms = bookmarks.parse(self.repo)
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for head, sha in self.git.remote_refs(remote_name).iteritems():
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hgsha = hex_to_sha(self.map_hg_get(sha))
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if not head == 'HEAD':
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bms[remote_name + '/' + head] = hgsha
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bookmarks.write(self.repo, bms)
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except AttributeError:
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self.ui.warn(_('creating bookmarks failed, do you have'
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' bookmarks enabled?\n'))
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def convert_git_int_mode(self, mode):
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# TODO : make these into constants
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convert = {
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33188: '',
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40960: 'l',
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33261: 'x'}
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if mode in convert:
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return convert[mode]
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return ''
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def extract_hg_metadata(self, message):
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split = message.split("\n\n--HG--\n", 1)
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renames = {}
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branch = False
|
|
if len(split) == 2:
|
|
message, meta = split
|
|
lines = meta.split("\n")
|
|
for line in lines:
|
|
if line == '':
|
|
continue
|
|
|
|
command, data = line.split(" : ", 1)
|
|
if command == 'rename':
|
|
before, after = data.split(" => ", 1)
|
|
renames[after] = before
|
|
if command == 'branch':
|
|
branch = data
|
|
return (message, renames, branch)
|
|
|
|
def pseudo_import_git_commit(self, commit):
|
|
(strip_message, hg_renames, hg_branch) = self.extract_hg_metadata(commit.message)
|
|
cs = self.map_hg_get(commit.id)
|
|
p1 = "0" * 40
|
|
p2 = "0" * 40
|
|
if len(commit.parents) > 0:
|
|
sha = commit.parents[0]
|
|
p1 = self.map_hg_get(sha)
|
|
if len(commit.parents) > 1:
|
|
sha = commit.parents[1]
|
|
p2 = self.map_hg_get(sha)
|
|
if len(commit.parents) > 2:
|
|
# TODO : map extra parents to the extras file
|
|
pass
|
|
# saving rename info
|
|
if (not (p2 == "0"*40) or (p1 == "0"*40)):
|
|
self.renames[cs] = {}
|
|
else:
|
|
self.renames[cs] = self.renames[p1].copy()
|
|
|
|
self.renames[cs].update(hg_renames)
|
|
|
|
def import_git_commit(self, commit):
|
|
self.ui.debug(_("importing: %s\n") % commit.id)
|
|
# TODO : find and use hg named branches
|
|
# TODO : add extra Git data (committer info) as extras to changeset
|
|
|
|
# TODO : (?) have to handle merge contexts at some point (two parent files, etc)
|
|
# TODO : Do something less coarse-grained than try/except on the
|
|
# get_file call for removed files
|
|
|
|
(strip_message, hg_renames, hg_branch) = self.extract_hg_metadata(commit.message)
|
|
|
|
def getfilectx(repo, memctx, f):
|
|
try:
|
|
(mode, sha, data) = self.git.get_file(commit, f)
|
|
e = self.convert_git_int_mode(mode)
|
|
except TypeError:
|
|
raise IOError()
|
|
if f in hg_renames:
|
|
copied_path = hg_renames[f]
|
|
else:
|
|
copied_path = None
|
|
return context.memfilectx(f, data, 'l' in e, 'x' in e, copied_path)
|
|
|
|
p1 = "0" * 40
|
|
p2 = "0" * 40
|
|
if len(commit.parents) > 0:
|
|
sha = commit.parents[0]
|
|
p1 = self.map_hg_get(sha)
|
|
if len(commit.parents) > 1:
|
|
sha = commit.parents[1]
|
|
p2 = self.map_hg_get(sha)
|
|
if len(commit.parents) > 2:
|
|
# TODO : map extra parents to the extras file
|
|
pass
|
|
|
|
# get a list of the changed, added, removed files
|
|
files = self.git.get_files_changed(commit)
|
|
|
|
# wierd hack for explicit file renames in first but not second branch
|
|
if not (p2 == "0"*40):
|
|
vals = [item for item in self.renames[p1].values() if not item in self.renames[p2].values()]
|
|
for removefile in vals:
|
|
files.remove(removefile)
|
|
|
|
extra = {}
|
|
|
|
# if named branch, add to extra
|
|
if hg_branch:
|
|
extra['branch'] = hg_branch
|
|
|
|
# if committer is different than author, add it to extra
|
|
if not commit._author_raw == commit._committer_raw:
|
|
extra['committer'] = "%s %d %d" % (commit.committer, commit.commit_time, -commit.commit_timezone)
|
|
|
|
if commit._encoding:
|
|
extra['encoding'] = commit._encoding
|
|
|
|
if hg_branch:
|
|
extra['branch'] = hg_branch
|
|
|
|
text = strip_message
|
|
date = (commit.author_time, -commit.author_timezone)
|
|
ctx = context.memctx(self.repo, (p1, p2), text, files, getfilectx,
|
|
commit.author, date, extra)
|
|
a = self.repo.commitctx(ctx)
|
|
|
|
# get changeset id
|
|
cs = hex(self.repo.changelog.tip())
|
|
# save changeset to mapping file
|
|
gitsha = commit.id
|
|
|
|
# saving rename info
|
|
if (not (p2 == "0"*40) or (p1 == "0"*40)):
|
|
self.renames[cs] = {}
|
|
else:
|
|
self.renames[cs] = self.renames[p1].copy()
|
|
|
|
self.renames[cs].update(hg_renames)
|
|
|
|
self.map_set(gitsha, cs)
|
|
|
|
def check_bookmarks(self):
|
|
if self.ui.config('extensions', 'hgext.bookmarks') is not None:
|
|
self.ui.warn("YOU NEED TO SETUP BOOKMARKS\n")
|
|
|
|
def get_transport_and_path(self, uri):
|
|
from dulwich.client import TCPGitClient, SSHGitClient, SubprocessGitClient
|
|
for handler, transport in (("git://", TCPGitClient), ("git@", SSHGitClient), ("git+ssh://", SSHGitClient)):
|
|
if uri.startswith(handler):
|
|
if handler == 'git@':
|
|
host, path = uri[len(handler):].split(":", 1)
|
|
host = 'git@' + host
|
|
else:
|
|
host, path = uri[len(handler):].split("/", 1)
|
|
return transport(host), '/' + path
|
|
# if its not git or git+ssh, try a local url..
|
|
return SubprocessGitClient(), uri
|
|
|
|
def clear(self):
|
|
mapfile = self.repo.join(self.mapfile)
|
|
if os.path.exists(self.gitdir):
|
|
for root, dirs, files in os.walk(self.gitdir, topdown=False):
|
|
for name in files:
|
|
os.remove(os.path.join(root, name))
|
|
for name in dirs:
|
|
os.rmdir(os.path.join(root, name))
|
|
os.rmdir(self.gitdir)
|
|
if os.path.exists(mapfile):
|
|
os.remove(mapfile)
|