hg-remotebranches / hg_remotebranches.py

import os

from mercurial import config
from mercurial import context
from mercurial import hg
from mercurial import node
from mercurial import ui
from mercurial import url
from mercurial import util

from hgext import schemes

def reposetup(ui, repo):
    if not repo.local():
        return

    opull = repo.pull
    opush = repo.push
    olookup = repo.lookup
    ofindtags = repo._findtags

    class remotebranchesrepo(repo.__class__):
        def _findtags(self):
            (tags, tagtypes) = ofindtags()
            tags.update(self._remotebranches)
            return (tags, tagtypes)

        @util.propertycache
        def _remotebranches(self):
            remotebranches = {}
            bfile = self.join('remotebranches')
            if os.path.exists(bfile):
                f = open(bfile)
                for line in f:
                    line = line.strip()
                    if line:
                        hash, name = line.split(' ', 1)
                        # look up the hash in the changelog directly
                        # to avoid infinite recursion if the hash is bogus
                        n = self.changelog._match(hash)
                        if n:
                            # we need rev since node will recurse lookup
                            ctx = context.changectx(self,
                                                    self.changelog.rev(n))
                            if not ctx.extra().get('close'):
                                remotebranches[name] = n
            return remotebranches

        def lookup(self, key):
            try:
                if key in self._remotebranches:
                    key = self._remotebranches[key]
            except TypeError: # unhashable type
                pass
            return olookup(key)

        def pull(self, remote, *args, **kwargs):
            res = opull(remote, *args, **kwargs)
            lock = self.lock()
            try:
                try:
                    path = self._activepath(remote)
                    if path:
                        self.saveremotebranches(path, remote.branchmap())
                except Exception, e:
                    ui.debug('remote branches for path %s not saved: %s\n'
                             % (path, e))
            finally:
                lock.release()
                return res

        def push(self, remote, *args, **kwargs):
            res = opush(remote, *args, **kwargs)
            lock = self.lock()
            try:
                try:
                    path = self._activepath(remote)
                    if path:
                        self.saveremotebranches(path, remote.branchmap())
                except Exception, e:
                    ui.debug('remote branches for path %s not saved: %s\n'
                             % (path, e))
            finally:
                lock.release()
                return res

        def _activepath(self, remote):
            conf = config.config()
            rc = self.join('hgrc')
            if os.path.exists(rc):
                fp = open(rc)
                conf.parse('.hgrc', fp.read())
                fp.close()
            realpath = ''
            if 'paths' in conf:
                for path, uri in conf['paths'].items():
                    for s in schemes.schemes.iterkeys():
                        if uri.startswith('%s://' % s):
                            # TODO: refactor schemes so we don't
                            # duplicate this logic
                            ui.note('performing schemes expansion with '
                                    'scheme %s\n' % s)
                            scheme = hg.schemes[s]
                            parts = uri.split('://', 1)[1].split('/',
                                                                 scheme.parts)
                            if len(parts) > scheme.parts:
                                tail = parts[-1]
                                parts = parts[:-1]
                            else:
                                tail = ''
                            context = dict((str(i+1), v) for i, v in
                                           enumerate(parts))
                            uri = ''.join(scheme.templater.process(
                                scheme.url, context)) + tail
                    uri = self.ui.expandpath(uri)
                    if remote.local():
                        uri = os.path.realpath(uri)
                        rpath = remote.root
                    else:
                        rpath = remote._url
                        if uri.startswith('http'):
                            uri = url.getauthinfo(uri)[0]
                    uri = uri.rstrip('/')
                    rpath = rpath.rstrip('/')
                    if uri == rpath:
                        realpath = path
                        # prefer a non-default name to default
                        if path != 'default':
                            break
            return realpath

        def saveremotebranches(self, remote, bm):
            real = {}
            bfile = self.join('remotebranches')
            olddata = []
            existed = os.path.exists(bfile)
            if existed:
                f = open(bfile)
                olddata = [l for l in f
                           if not l.split(' ', 1)[1].startswith(remote)]
            f = open(bfile, 'w')
            if existed:
                f.write(''.join(olddata))
            for branch, nodes in bm.iteritems():
                for n in nodes:
                    f.write('%s %s/%s\n' % (node.hex(n), remote, branch))
                real[branch] = [node.hex(x) for x in nodes]
            f.close()

    repo.__class__ = remotebranchesrepo
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