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Viewing changes to bzrlib/plugins/launchpad/lp_api.py

  • Committer: Martin Pool
  • Date: 2010-02-23 07:43:11 UTC
  • mfrom: (4797.2.20 2.1)
  • mto: This revision was merged to the branch mainline in revision 5055.
  • Revision ID: mbp@sourcefrog.net-20100223074311-gnj55xdhrgz9l94e
Merge 2.1 back to trunk

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bzrlib/plugins/launchpad/lp_api.py
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# Copyright (C) 2009 Canonical Ltd
 
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# Copyright (C) 2010 Canonical Ltd
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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import os
 
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import re
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from bzrlib import (
 
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    branch,
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    config,
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    errors,
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    osutils,
 
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    trace,
 
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    transport,
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    )
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from bzrlib.plugins.launchpad.lp_registration import (
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    InvalidLaunchpadInstance,
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    return launchpad
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class LaunchpadBranch(object):
 
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    """Provide bzr and lp API access to a Launchpad branch."""
 
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    def __init__(self, lp_branch, bzr_url, bzr_branch=None, check_update=True):
 
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        """Constructor.
 
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        :param lp_branch: The Launchpad branch.
 
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        :param bzr_url: The URL of the Bazaar branch.
 
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        :param bzr_branch: An instance of the Bazaar branch.
 
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        """
 
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        self.bzr_url = bzr_url
 
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        self._bzr = bzr_branch
 
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        self._push_bzr = None
 
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        self._check_update = check_update
 
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        self.lp = lp_branch
 
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    @property
 
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    def bzr(self):
 
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        """Return the bzr branch for this branch."""
 
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        if self._bzr is None:
 
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            self._bzr = branch.Branch.open(self.bzr_url)
 
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        return self._bzr
 
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    @property
 
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    def push_bzr(self):
 
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        """Return the push branch for this branch."""
 
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        if self._push_bzr is None:
 
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            self._push_bzr = branch.Branch.open(self.lp.bzr_identity)
 
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        return self._push_bzr
 
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    @staticmethod
 
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    def plausible_launchpad_url(url):
 
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        """Is 'url' something that could conceivably be pushed to LP?
 
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        :param url: A URL that may refer to a Launchpad branch.
 
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        :return: A boolean.
 
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        """
 
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        if url is None:
 
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            return False
 
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        if url.startswith('lp:'):
 
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            return True
 
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        regex = re.compile('([a-z]*\+)*(bzr\+ssh|http)'
 
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                           '://bazaar.*.launchpad.net')
 
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        return bool(regex.match(url))
 
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    @staticmethod
 
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    def candidate_urls(bzr_branch):
 
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        """Iterate through related URLs that might be Launchpad URLs.
 
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        :param bzr_branch: A Bazaar branch to find URLs from.
 
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        :return: a generator of URL strings.
 
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        """
 
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        url = bzr_branch.get_public_branch()
 
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        if url is not None:
 
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            yield url
 
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        url = bzr_branch.get_push_location()
 
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        if url is not None:
 
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            yield url
 
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        yield bzr_branch.base
 
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    @staticmethod
 
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    def tweak_url(url, launchpad):
 
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        """Adjust a URL to work with staging, if needed."""
 
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        if str(launchpad._root_uri) != STAGING_SERVICE_ROOT:
 
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            return url
 
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        if url is None:
 
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            return None
 
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        return url.replace('bazaar.launchpad.net',
 
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                           'bazaar.staging.launchpad.net')
 
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    @classmethod
 
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    def from_bzr(cls, launchpad, bzr_branch):
 
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        """Find a Launchpad branch from a bzr branch."""
 
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        check_update = True
 
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        for url in cls.candidate_urls(bzr_branch):
 
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            url = cls.tweak_url(url, launchpad)
 
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            if not cls.plausible_launchpad_url(url):
 
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                continue
 
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            lp_branch = launchpad.branches.getByUrl(url=url)
 
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            if lp_branch is not None:
 
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                break
 
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        else:
 
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            lp_branch = cls.create_now(launchpad, bzr_branch)
 
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            check_update = False
 
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        return cls(lp_branch, bzr_branch.base, bzr_branch, check_update)
 
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    @classmethod
 
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    def create_now(cls, launchpad, bzr_branch):
 
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        """Create a Bazaar branch on Launchpad for the supplied branch."""
 
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        url = cls.tweak_url(bzr_branch.get_push_location(), launchpad)
 
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        if not cls.plausible_launchpad_url(url):
 
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            raise errors.BzrError('%s is not registered on Launchpad' %
 
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                                  bzr_branch.base)
 
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        bzr_branch.create_clone_on_transport(transport.get_transport(url))
 
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        lp_branch = launchpad.branches.getByUrl(url=url)
 
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        if lp_branch is None:
 
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            raise errors.BzrError('%s is not registered on Launchpad' % url)
 
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        return lp_branch
 
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    def get_dev_focus(self):
 
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        """Return the 'LaunchpadBranch' for the dev focus of this one."""
 
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        lp_branch = self.lp
 
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        if lp_branch.project is None:
 
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            raise errors.BzrError('%s has no product.' %
 
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                                  lp_branch.bzr_identity)
 
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        dev_focus = lp_branch.project.development_focus.branch
 
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        if dev_focus is None:
 
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            raise errors.BzrError('%s has no development focus.' %
 
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                                  lp_branch.bzr_identity)
 
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        return LaunchpadBranch(dev_focus, dev_focus.bzr_identity)
 
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    def update_lp(self):
 
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        """Update the Launchpad copy of this branch."""
 
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        if not self._check_update:
 
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            return
 
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        self.bzr.lock_read()
 
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        try:
 
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            if self.lp.last_scanned_id is not None:
 
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                if self.bzr.last_revision() == self.lp.last_scanned_id:
 
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                    trace.note('%s is already up-to-date.' %
 
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                               self.lp.bzr_identity)
 
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                    return
 
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                graph = self.bzr.repository.get_graph()
 
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                if not graph.is_ancestor(self.lp.last_scanned_id,
 
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                                         self.bzr.last_revision()):
 
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                    raise errors.DivergedBranches(self.bzr, self.push_bzr)
 
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                trace.note('Pushing to %s' % self.lp.bzr_identity)
 
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            self.bzr.push(self.push_bzr)
 
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        finally:
 
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            self.bzr.unlock()
 
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    def find_lca_tree(self, other):
 
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        """Find the revision tree for the LCA of this branch and other.
 
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        :param other: Another LaunchpadBranch
 
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        :return: The RevisionTree of the LCA of this branch and other.
 
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        """
 
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        graph = self.bzr.repository.get_graph(other.bzr.repository)
 
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        lca = graph.find_unique_lca(self.bzr.last_revision(),
 
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                                    other.bzr.last_revision())
 
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        return self.bzr.repository.revision_tree(lca)
 
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def load_branch(launchpad, branch):
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    """Return the launchpadlib Branch object corresponding to 'branch'.
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