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# order.py -- order projects in dependency order
#
# Copyright 2012 Lars Wirzenius
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
def order(projects):
by_name = {}
for project in projects:
by_name[project['name']] = project
for project in projects:
project['_'] = [by_name[dep['name']]
for dep in project.get('build-depends, [])]
linear = []
for project in projects:
linear.extend(project['_'])
linear.append(project)
result = []
while linear:
project = linear.pop(0)
if project not in linear:
result.append(project)
return result
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