Blame progit/fork.py

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#-*- coding: utf-8 -*-
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"""
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 (c) 2014 - Copyright Red Hat Inc
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 Authors:
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   Pierre-Yves Chibon <pingou@pingoured.fr></pingou@pingoured.fr>
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"""
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import flask
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import os
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import shutil
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import tempfile
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from math import ceil
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import pygit2
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from sqlalchemy.exc import SQLAlchemyError
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from pygments import highlight
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from pygments.lexers import guess_lexer
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from pygments.lexers.text import DiffLexer
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from pygments.formatters import HtmlFormatter
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import progit.doc_utils
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import progit.lib
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import progit.forms
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from progit import (APP, SESSION, LOG, __get_file_in_tree, cla_required,
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                    is_repo_admin, generate_gitolite_acls)
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@APP.route('/<repo>/request-pulls')</repo>
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@APP.route('/fork/<username>/<repo>/request-pulls')</repo></username>
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def request_pulls(repo, username=None):
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    """ Request pulling the changes from the fork into the project.
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    """
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    status = flask.request.args.get('status', True)
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    repo = progit.lib.get_project(SESSION, repo, user=username)
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    if not repo:
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        flask.abort(404, 'Project not found')
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    if status is False or str(status).lower() == 'closed':
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        requests = progit.lib.get_pull_requests(
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            SESSION, project_id=repo.id, status=False)
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    else:
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        requests = progit.lib.get_pull_requests(
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            SESSION, project_id=repo.id, status=status)
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    return flask.render_template(
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        'requests.html',
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        select='requests',
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        repo=repo,
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        username=username,
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        requests=requests,
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        status=status,
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    )
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@APP.route('/<repo>/request-pull/<requestid>')</requestid></repo>
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@APP.route('/fork/<username>/<repo>/request-pull/<requestid>')</requestid></repo></username>
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def request_pull(repo, requestid, username=None):
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    """ Request pulling the changes from the fork into the project.
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    """
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    repo = progit.lib.get_project(SESSION, repo, user=username)
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    if not repo:
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        flask.abort(404, 'Project not found')
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    request = progit.lib.get_pull_request(
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        SESSION, project_id=repo.id, requestid=requestid)
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    if not request:
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        flask.abort(404, 'Pull-request not found')
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    if repo.is_fork:
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        repopath = os.path.join(APP.config['FORK_FOLDER'], repo.path)
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    else:
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        repopath = os.path.join(APP.config['GIT_FOLDER'], repo.path)
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    repo_obj = pygit2.Repository(repopath)
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    if repo.parent:
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        parentname = os.path.join(APP.config['GIT_FOLDER'], repo.parent.path)
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    else:
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        parentname = os.path.join(APP.config['GIT_FOLDER'], repo.path)
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    orig_repo = pygit2.Repository(parentname)
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    diff_commits = []
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    diffs = []
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    repo_commit = repo_obj[request.stop_id]
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    if not repo_obj.is_empty and not orig_repo.is_empty:
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        orig_commit = orig_repo[
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            orig_repo.lookup_branch('master').get_object().hex]
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        master_commits = [
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            commit.oid.hex
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            for commit in orig_repo.walk(
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                orig_repo.lookup_branch('master').get_object().hex,
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                pygit2.GIT_SORT_TIME)
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        ]
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        repo_commit = repo_obj[request.start_id]
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        for commit in repo_obj.walk(
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                request.stop_id, pygit2.GIT_SORT_TIME):
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            if commit.oid.hex in master_commits:
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                break
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            diff_commits.append(commit)
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            diffs.append(
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                repo_obj.diff(
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                    repo_obj.revparse_single(commit.parents[0].oid.hex),
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                    repo_obj.revparse_single(commit.oid.hex)
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                )
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            )
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    elif orig_repo.is_empty:
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        orig_commit = None
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        diff = repo_commit.tree.diff_to_tree(swap=True)
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    else:
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        flask.flash(
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            'Fork is empty, there are no commits to request pulling',
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            'error')
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        return flask.redirect(flask.url_for(
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            'view_repo', username=username, repo=repo.name))
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    html_diffs = []
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    for diff in diffs:
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        html_diffs.append(
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            highlight(
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                diff.patch,
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                DiffLexer(),
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                HtmlFormatter(
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                    noclasses=True,
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                    style="tango",)
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            )
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        )
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    return flask.render_template(
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        'pull_request.html',
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        select='requests',
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        requestid=requestid,
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        repo=repo,
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        username=username,
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        request=request,
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        repo_admin=is_repo_admin(request.repo),
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        repo_obj=repo_obj,
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        orig_repo=orig_repo,
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        diff_commits=diff_commits,
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        diffs=diffs,
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        html_diffs=html_diffs,
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    )
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@APP.route('/<repo>/request-pull/merge/<requestid>')</requestid></repo>
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@APP.route('/fork/<username>/<repo>/request-pull/merge/<requestid>')</requestid></repo></username>
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def merge_request_pull(repo, requestid, username=None):
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    """ Request pulling the changes from the fork into the project.
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    """
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    repo = progit.lib.get_project(SESSION, repo, user=username)
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    if not repo:
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        flask.abort(404, 'Project not found')
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    request = progit.lib.get_pull_request(
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        SESSION, project_id=repo.id, requestid=requestid)
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    if not request:
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        flask.abort(404, 'Pull-request not found')
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    if not is_repo_admin(repo):
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        flask.abort(
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            403,
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            'You are not allowed to merge pull-request for this project')
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    error_output = flask.url_for(
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        'request_pull', repo=repo.name, requestid=requestid)
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    if username:
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        error_output = flask.url_for(
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            'fork_request_pull',
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            repo=repo.name,
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            requestid=requestid,
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            username=username)
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    # Get the fork
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    if request.repo_from.is_fork:
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        repopath = os.path.join(
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            APP.config['FORK_FOLDER'], request.repo_from.path)
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    else:
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        repopath = os.path.join(
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            APP.config['GIT_FOLDER'], request.repo_from.path)
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    fork_obj = pygit2.Repository(repopath)
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    # Get the original repo
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    parentpath = os.path.join(APP.config['GIT_FOLDER'], request.repo.path)
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    orig_repo = pygit2.Repository(parentpath)
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    # Clone the original repo into a temp folder
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    newpath = tempfile.mkdtemp()
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    new_repo = pygit2.clone_repository(parentpath, newpath)
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    repo_commit = fork_obj[request.stop_id]
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    ori_remote = new_repo.remotes[0]
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    # Add the fork as remote repo
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    reponame = '%s_%s' % (request.user.user, repo.name)
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    remote = new_repo.create_remote(reponame, repopath)
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    # Fetch the commits
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    remote.fetch()
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    merge = new_repo.merge(repo_commit.oid)
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    master_ref = new_repo.lookup_reference('HEAD').resolve()
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    refname = '%s:%s' % (master_ref.name, master_ref.name)
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    if merge.is_uptodate:
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        flask.flash('Nothing to do, changes were already merged', 'error')
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        progit.lib.close_pull_request(SESSION, request)
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        SESSION.commit()
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        return flask.redirect(error_output)
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    elif merge.is_fastforward:
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        master_ref.target = merge.fastforward_oid
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        ori_remote.push(refname)
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        flask.flash('Changes merged!')
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    else:
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        new_repo.index.write()
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        try:
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            tree = new_repo.index.write_tree()
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        except pygit2.GitError:
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            shutil.rmtree(newpath)
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            flask.flash('Merge conflicts!', 'error')
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            return flask.redirect(flask.url_for(
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                'request_pull',
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                repo=repo.name,
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                username=username,
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                requestid=requestid))
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        head = new_repo.lookup_reference('HEAD').get_object()
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        commit = new_repo[head.oid]
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        sha = new_repo.create_commit(
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            'refs/heads/master',
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            repo_commit.author,
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            repo_commit.committer,
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            'Merge #%s `%s`' % (request.id, request.title),
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            tree,
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            [head.hex, repo_commit.oid.hex])
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        ori_remote.push(refname)
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        flask.flash('Changes merged!')
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    # Update status
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    progit.lib.close_pull_request(SESSION, request)
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    SESSION.commit()
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    shutil.rmtree(newpath)
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    return flask.redirect(flask.url_for('view_repo', repo=repo.name))
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## Specific actions
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@APP.route('/do_fork/<repo>')</repo>
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@APP.route('/do_fork/<username>/<repo>')</repo></username>
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@cla_required
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def fork_project(repo, username=None):
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    """ Fork the project specified into the user's namespace
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    """
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    repo = progit.lib.get_project(SESSION, repo, user=username)
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    if repo is None:
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        flask.abort(404)
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    try:
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        message = progit.lib.fork_project(
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            session=SESSION,
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            repo=repo,
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            gitfolder=APP.config['GIT_FOLDER'],
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            forkfolder=APP.config['FORK_FOLDER'],
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            docfolder=APP.config['DOCS_FOLDER'],
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            user=flask.g.fas_user.username)
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        SESSION.commit()
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        generate_gitolite_acls()
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        flask.flash(message)
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        return flask.redirect(
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            flask.url_for(
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                'view_repo',
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                username=flask.g.fas_user.username,
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                repo=repo.name)
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        )
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    except progit.exceptions.ProgitException, err:
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        flask.flash(str(err), 'error')
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    except SQLAlchemyError, err:  # pragma: no cover
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        SESSION.rollback()
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        flask.flash(str(err), 'error')
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    return flask.redirect(flask.url_for('view_repo', repo=repo.name))
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@APP.route('/<repo>/request-pull/new',</repo>
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           methods=('GET', 'POST'))
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@APP.route('/<repo>/request-pull/new/<commitid>',</commitid></repo>
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           methods=('GET', 'POST'))
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@APP.route('/fork/<username>/<repo>/request-pull/new',</repo></username>
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           methods=('GET', 'POST'))
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@APP.route('/fork/<username>/<repo>/request-pull/new/<commitid>',</commitid></repo></username>
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           methods=('GET', 'POST'))
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@cla_required
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def new_request_pull(repo, username=None, commitid=None):
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    """ Request pulling the changes from the fork into the project.
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    """
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    repo = progit.lib.get_project(SESSION, repo, user=username)
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    if not repo:
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        flask.abort(404)
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    if not is_repo_admin(repo):
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        flask.abort(
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            403,
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            'You are not allowed to create pull-requests for this project')
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    if repo.is_fork:
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        repopath = os.path.join(APP.config['FORK_FOLDER'], repo.path)
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    else:
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        repopath = os.path.join(APP.config['GIT_FOLDER'], repo.path)
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    repo_obj = pygit2.Repository(repopath)
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    if repo.parent:
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        parentname = os.path.join(APP.config['GIT_FOLDER'], repo.parent.path)
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    else:
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        parentname = os.path.join(APP.config['GIT_FOLDER'], repo.path)
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    orig_repo = pygit2.Repository(parentname)
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    if commitid is None:
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        commitid = repo_obj.head.target
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        branchname = flask.request.args.get('branch', None)
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        if branchname:
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            branch = repo_obj.lookup_branch(branchname)
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            commitid = branch.get_object().hex
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    diff_commits = []
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    diffs = []
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    if not repo_obj.is_empty and not orig_repo.is_empty:
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        orig_commit = orig_repo[
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            orig_repo.lookup_branch('master').get_object().hex]
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        master_commits = [
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            commit.oid.hex
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            for commit in orig_repo.walk(
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                orig_repo.lookup_branch('master').get_object().hex,
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                pygit2.GIT_SORT_TIME)
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        ]
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        repo_commit = repo_obj[commitid]
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        for commit in repo_obj.walk(
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                repo_commit.oid.hex, pygit2.GIT_SORT_TIME):
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            if commit.oid.hex in master_commits:
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                break
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            diff_commits.append(commit)
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            diffs.append(
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                repo_obj.diff(
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                    repo_obj.revparse_single(commit.parents[0].oid.hex),
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                    repo_obj.revparse_single(commit.oid.hex)
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                )
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            )
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    elif orig_repo.is_empty:
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        orig_commit = None
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        repo_commit = repo_obj[repo_obj.head.target]
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        diff = repo_commit.tree.diff_to_tree(swap=True)
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    else:
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        flask.flash(
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            'Fork is empty, there are no commits to request pulling',
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            'error')
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        return flask.redirect(flask.url_for(
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            'view_repo', username=username, repo=repo.name))
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    html_diffs = []
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    for diff in diffs:
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        html_diffs.append(
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            highlight(
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                diff.patch,
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                DiffLexer(),
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                HtmlFormatter(
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                    noclasses=True,
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                    style="tango",)
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            )
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        )
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    form = progit.forms.RequestPullForm()
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    if form.validate_on_submit():
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        try:
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            if orig_commit:
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                orig_commit = orig_commit.oid.hex
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            parent = repo
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            if repo.parent:
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                parent = repo.parent
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            message = progit.lib.new_pull_request(
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                SESSION,
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                repo=parent,
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                repo_from=repo,
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                title=form.title.data,
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                start_id=orig_commit,
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                stop_id=repo_commit.oid.hex,
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                user=flask.g.fas_user.username,
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            )
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            SESSION.commit()
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            flask.flash(message)
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            if not parent.is_fork:
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                url = flask.url_for(
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                    'request_pulls', username=None, repo=parent.name)
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            else:
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                url = flask.url_for(
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                    'request_pulls', username=parent.user, repo=parent.name)
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            return flask.redirect(url)
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        except progit.exceptions.ProgitException, err:
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            flask.flash(str(err), 'error')
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        except SQLAlchemyError, err:  # pragma: no cover
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            SESSION.rollback()
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            flask.flash(str(err), 'error')
Pierre-Yves Chibon ac8023
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    return flask.render_template(
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        'pull_request.html',
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        select='requests',
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        repo=repo,
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        username=username,
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        commitid=commitid,
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        repo_obj=repo_obj,
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        orig_repo=orig_repo,
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        diff_commits=diff_commits,
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        diffs=diffs,
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        html_diffs=html_diffs,
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        form=form,
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    )