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+#!/usr/bin/env python
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+# coding=utf8
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+
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+"""remove duplicate constraint
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+
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+@contact: Debian FTP Master <ftpmaster@debian.org>
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+@copyright: 2018, Bastian Blank <waldi@debian.org>
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+@license: GNU General Public License version 2 or later
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+"""
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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+
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+################################################################################
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+
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+from __future__ import print_function
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+
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+import psycopg2
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+from daklib.dak_exceptions import DBUpdateError
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+from daklib.config import Config
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+
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+################################################################################
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+
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+
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+def do_update(self):
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+ print(__doc__)
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+ try:
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+ cnf = Config()
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+
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+ c = self.db.cursor()
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+
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+ c.execute("ALTER TABLE ONLY suite_src_formats DROP CONSTRAINT suite_src_formats_suite_key")
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+
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+ c.execute("UPDATE config SET value = '120' WHERE name = 'db_revision'")
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+ self.db.commit()
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+
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+ except psycopg2.ProgrammingError as msg:
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+ self.db.rollback()
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+ raise DBUpdateError('Unable to apply sick update 120, rollback issued. Error message: {0}'.format(msg))
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