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

try:
    from mercurial import revset
    # force demandimport to load revset
    revset.methods
except ImportError:
   revset = None

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 = getattr(remote, 'root', None)
                    else:
                        rpath = remote._url
                        if uri.startswith('http'):
                            try:
                                uri = url.url(uri).authinfo()[0]
                            except AttributeError:
                                try:
                                    uri = util.url(uri).authinfo()[0]
                                except AttributeError:
                                    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

def upstream_revs(filt, repo, subset, x):
    nodes = [node.hex(n) for name, n in
             repo._remotebranches.iteritems() if filt(name)]
    if not nodes: []
    upstream = reduce(lambda x, y: x.update(y) or x,
                      map(lambda x: set(revset.ancestors(repo, subset, x)),
                          [('string', n) for n in nodes]),
                      set())
    return [r for r in subset if r in upstream]

def upstream(repo, subset, x):
    '''``upstream()``
    Select changesets in an upstream repository according to remotebranches.
    '''
    args = revset.getargs(x, 0, 0, "upstream takes no arguments")
    upstream_names = [s + '/' for s in
                      repo.ui.configlist('remotebranches', 'upstream')]
    if not upstream_names:
        filt = lambda x: True
    else:
        filt = lambda name: any(map(name.startswith, upstream_names))
    return upstream_revs(filt, repo, subset, x)

def pushed(repo, subset, x):
    '''``pushed()``
    Select changesets in any remote repository according to remotebranches.
    '''
    args = revset.getargs(x, 0, 0, "pushed takes no arguments")
    return upstream_revs(lambda x: True, repo, subset, x)

if revset is not None:
    revset.symbols.update({'upstream': upstream,
                           'pushed': pushed})
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