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

(jameinel) Allow 'bzr serve' to interpret SIGHUP as a graceful shutdown.
 (bug #795025) (John A Meinel)

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bzrlib/plugins/launchpad/lp_propose.py
 
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# Copyright (C) 2010, 2011 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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# the Free Software Foundation; either version 2 of the License, or
 
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# (at your option) any later version.
 
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#
 
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# This program is distributed in the hope that it will be useful,
 
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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# GNU General Public License for more details.
 
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#
 
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# You should have received a copy of the GNU General Public License
 
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# along with this program; if not, write to the Free Software
 
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
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from bzrlib import (
 
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    errors,
 
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    hooks,
 
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    )
 
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from bzrlib.lazy_import import lazy_import
 
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lazy_import(globals(), """
 
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import webbrowser
 
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from bzrlib import (
 
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    msgeditor,
 
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    )
 
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from bzrlib.plugins.launchpad import (
 
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    lp_api,
 
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    lp_registration,
 
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    )
 
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""")
 
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class ProposeMergeHooks(hooks.Hooks):
 
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    """Hooks for proposing a merge on Launchpad."""
 
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    def __init__(self):
 
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        hooks.Hooks.__init__(self, "bzrlib.plugins.launchpad.lp_propose",
 
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            "Proposer.hooks")
 
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        self.add_hook('get_prerequisite',
 
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            "Return the prerequisite branch for proposing as merge.", (2, 1))
 
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        self.add_hook('merge_proposal_body',
 
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            "Return an initial body for the merge proposal message.", (2, 1))
 
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46
 
 
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class Proposer(object):
 
48
 
 
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    hooks = ProposeMergeHooks()
 
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    def __init__(self, tree, source_branch, target_branch, message, reviews,
 
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                 staging=False, approve=False):
 
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        """Constructor.
 
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        :param tree: The working tree for the source branch.
 
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        :param source_branch: The branch to propose for merging.
 
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        :param target_branch: The branch to merge into.
 
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        :param message: The commit message to use.  (May be None.)
 
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        :param reviews: A list of tuples of reviewer, review type.
 
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        :param staging: If True, propose the merge against staging instead of
 
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            production.
 
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        :param approve: If True, mark the new proposal as approved immediately.
 
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            This is useful when a project permits some things to be approved
 
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            by the submitter (e.g. merges between release and deployment
 
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            branches).
 
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        """
 
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        self.tree = tree
 
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        if staging:
 
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            lp_instance = 'staging'
 
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        else:
 
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            lp_instance = 'production'
 
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        service = lp_registration.LaunchpadService(lp_instance=lp_instance)
 
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        self.launchpad = lp_api.login(service)
 
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        self.source_branch = lp_api.LaunchpadBranch.from_bzr(
 
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            self.launchpad, source_branch)
 
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        if target_branch is None:
 
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            self.target_branch = self.source_branch.get_target()
 
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        else:
 
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            self.target_branch = lp_api.LaunchpadBranch.from_bzr(
 
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                self.launchpad, target_branch)
 
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        self.commit_message = message
 
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        # XXX: this is where bug lp:583638 could be tackled.
 
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        if reviews == []:
 
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            self.reviews = []
 
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        else:
 
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            self.reviews = [(self.launchpad.people[reviewer], review_type)
 
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                            for reviewer, review_type in
 
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                            reviews]
 
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        self.approve = approve
 
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    def get_comment(self, prerequisite_branch):
 
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        """Determine the initial comment for the merge proposal."""
 
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        info = ["Source: %s\n" % self.source_branch.lp.bzr_identity]
 
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        info.append("Target: %s\n" % self.target_branch.lp.bzr_identity)
 
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        if prerequisite_branch is not None:
 
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            info.append("Prereq: %s\n" % prerequisite_branch.lp.bzr_identity)
 
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        for rdata in self.reviews:
 
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            uniquename = "%s (%s)" % (rdata[0].display_name, rdata[0].name)
 
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            info.append('Reviewer: %s, type "%s"\n' % (uniquename, rdata[1]))
 
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        self.source_branch.bzr.lock_read()
 
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        try:
 
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            self.target_branch.bzr.lock_read()
 
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            try:
 
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                body = self.get_initial_body()
 
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            finally:
 
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                self.target_branch.bzr.unlock()
 
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        finally:
 
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            self.source_branch.bzr.unlock()
 
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        initial_comment = msgeditor.edit_commit_message(''.join(info),
 
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                                                        start_message=body)
 
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        return initial_comment.strip().encode('utf-8')
 
112
 
 
113
    def get_initial_body(self):
 
114
        """Get a body for the proposal for the user to modify.
 
115
 
 
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        :return: a str or None.
 
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        """
 
118
        def list_modified_files():
 
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            lca_tree = self.source_branch.find_lca_tree(
 
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                self.target_branch)
 
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            source_tree = self.source_branch.bzr.basis_tree()
 
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            files = modified_files(lca_tree, source_tree)
 
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            return list(files)
 
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        target_loc = ('bzr+ssh://bazaar.launchpad.net/%s' %
 
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                       self.target_branch.lp.unique_name)
 
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        body = None
 
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        for hook in self.hooks['merge_proposal_body']:
 
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            body = hook({
 
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                'tree': self.tree,
 
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                'target_branch': target_loc,
 
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                'modified_files_callback': list_modified_files,
 
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                'old_body': body,
 
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            })
 
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        return body
 
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    def check_proposal(self):
 
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        """Check that the submission is sensible."""
 
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        if self.source_branch.lp.self_link == self.target_branch.lp.self_link:
 
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            raise errors.BzrCommandError(
 
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                'Source and target branches must be different.')
 
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        for mp in self.source_branch.lp.landing_targets:
 
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            if mp.queue_status in ('Merged', 'Rejected'):
 
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                continue
 
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            if mp.target_branch.self_link == self.target_branch.lp.self_link:
 
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                raise errors.BzrCommandError(gettext(
 
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                    'There is already a branch merge proposal: %s') %
 
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                    lp_api.canonical_url(mp))
 
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    def _get_prerequisite_branch(self):
 
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        hooks = self.hooks['get_prerequisite']
 
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        prerequisite_branch = None
 
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        for hook in hooks:
 
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            prerequisite_branch = hook(
 
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                {'launchpad': self.launchpad,
 
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                 'source_branch': self.source_branch,
 
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                 'target_branch': self.target_branch,
 
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                 'prerequisite_branch': prerequisite_branch})
 
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        return prerequisite_branch
 
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160
    def call_webservice(self, call, *args, **kwargs):
 
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        """Make a call to the webservice, wrapping failures.
 
162
        
 
163
        :param call: The call to make.
 
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        :param *args: *args for the call.
 
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        :param **kwargs: **kwargs for the call.
 
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        :return: The result of calling call(*args, *kwargs).
 
167
        """
 
168
        from lazr.restfulclient import errors as restful_errors
 
169
        try:
 
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            return call(*args, **kwargs)
 
171
        except restful_errors.HTTPError, e:
 
172
            error_lines = []
 
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            for line in e.content.splitlines():
 
174
                if line.startswith('Traceback (most recent call last):'):
 
175
                    break
 
176
                error_lines.append(line)
 
177
            raise Exception(''.join(error_lines))
 
178
 
 
179
    def create_proposal(self):
 
180
        """Perform the submission."""
 
181
        prerequisite_branch = self._get_prerequisite_branch()
 
182
        if prerequisite_branch is None:
 
183
            prereq = None
 
184
        else:
 
185
            prereq = prerequisite_branch.lp
 
186
            prerequisite_branch.update_lp()
 
187
        self.source_branch.update_lp()
 
188
        reviewers = []
 
189
        review_types = []
 
190
        for reviewer, review_type in self.reviews:
 
191
            review_types.append(review_type)
 
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            reviewers.append(reviewer.self_link)
 
193
        initial_comment = self.get_comment(prerequisite_branch)
 
194
        mp = self.call_webservice(
 
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            self.source_branch.lp.createMergeProposal,
 
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            target_branch=self.target_branch.lp,
 
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            prerequisite_branch=prereq,
 
198
            initial_comment=initial_comment,
 
199
            commit_message=self.commit_message, reviewers=reviewers,
 
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            review_types=review_types)
 
201
        if self.approve:
 
202
            self.call_webservice(mp.setStatus, status='Approved')
 
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        webbrowser.open(lp_api.canonical_url(mp))
 
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205
 
 
206
def modified_files(old_tree, new_tree):
 
207
    """Return a list of paths in the new tree with modified contents."""
 
208
    for f, (op, path), c, v, p, n, (ok, k), e in new_tree.iter_changes(
 
209
        old_tree):
 
210
        if c and k == 'file':
 
211
            yield str(path)