view roundup/scripts/roundup_demo.py @ 5525:bb7865241f8a

Make CSV import/export compatible across Python versions (also RDBMS journals) (issue 2550976, issue 2550975). The roundup-admin export and import commands are used for migrating between different database backends. It is desirable that they should be usable also for migrations between Python 2 and Python 3, and in some cases (e.g. with the anydbm backend) this may be required. To be usable for such migrations, the format of the generated CSV files needs to be stable, meaning the same as currently used with Python 2. The export process uses repr() to produce the fields in the CSV files and eval() to convert them back to Python data structures. repr() of strings with non-ASCII characters produces different results for Python 2 and Python 3. This patch adds repr_export and eval_import functions to roundup/anypy/strings.py which provide the required operations that are just repr() and eval() in Python 2, but are more complicated in Python 3 to use data representations compatible with Python 2. These functions are then used in the required places for export and import. repr() and eval() are also used in storing the dict of changed values in the journal for the RDBMS backends. It is similarly desirable that the database be compatible between Python 2 and Python 3, so that export and import do not need to be used for a migration between Python versions for non-anydbm back ends. Thus, this patch changes rdbms_common.py in the places involved in storing journals in the database, not just in those involved in import/export. Given this patch, import/export with non-ASCII characters appear based on some limited testing to work across Python versions, and an instance using the sqlite backend appears to be compatible between Python versions without needing import/export, *if* the sessions/otks databases (which use anydbm) are deleted when changing Python version.
author Joseph Myers <jsm@polyomino.org.uk>
date Sun, 02 Sep 2018 23:48:04 +0000
parents 4cf48ff01e04
children d09a1d6a3bd9
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#! /usr/bin/env python
#
# Copyright 2004 Richard Jones (richard@mechanicalcat.net)
#

DEFAULT_HOME = './demo'
DEFAULT_TEMPLATE = 'classic'


import sys


# --- patch sys.path to make sure 'import roundup' finds correct version
import os.path as osp

thisdir = osp.dirname(osp.abspath(__file__))
rootdir = osp.dirname(osp.dirname(thisdir))
if (osp.exists(thisdir + '/__init__.py') and
        osp.exists(rootdir + '/roundup/__init__.py')):
    # the script is located inside roundup source code
    sys.path.insert(0, rootdir)
# --/


from roundup import admin, configuration, demo, instance
from roundup.i18n import _
from roundup.anypy.my_input import my_input

def run():
    home = DEFAULT_HOME
    template = DEFAULT_TEMPLATE
    nuke = sys.argv[-1] == 'nuke'
    # if there is no tracker in home, force nuke
    try:
        instance.open(home)
    except configuration.NoConfigError:
        nuke = 1
    # if we are to create the tracker, prompt for home
    if nuke:
        if len(sys.argv) > 2:
            backend = sys.argv[-2]
        else:
            backend = 'anydbm'
        # FIXME: i'd like to have an option to abort the tracker creation
        #   say, by entering a single dot.  but i cannot think of
        #   appropriate prompt for that.
        home = my_input(
            _('Enter directory path to create demo tracker [%s]: ') % home)
        if not home:
            home = DEFAULT_HOME
        templates = admin.AdminTool().listTemplates().keys()
        template = my_input(
            _('Enter tracker template to use (one of (%s)) [%s]: ') %
            (','.join(templates),template))
        if not template:
            template = DEFAULT_TEMPLATE
        # install
        demo.install_demo(home, backend,
            admin.AdminTool().listTemplates()[template]['path'])
    # run
    demo.run_demo(home)

if __name__ == '__main__':
    run()

# vim: set et sts=4 sw=4 :

Roundup Issue Tracker: http://roundup-tracker.org/