Thanks for an informative answer!
2013-04-10 20:14, Barry Warsaw skrev:
Definitely investigate these tools, although my suspicion is that they won't
help, or at least won't help enough to make accepting a new dependency worth
it.
There are a few problems to consider:
* MM2's configuration file is a Python file which really must be imported in
order to get a valid set of values. MM3's configuration file is a stack of
.ini-style files.
I am trying to find and understand the configuration files so that I
know what that that needs to be migrated and to what form. Is the MM2
configuration you refer to mainly Mailman/mm_cfg.py and MM3
configuration files src/mailman/config/* and /src/mailman/<listname>/*?
* There is not always a 1-to-1 correspondence between MM2 values and MM3
values. Some configurations have been merged, some removed, etc. You will
pretty much have to go through each set of MM2 variables and decide if and
how to transform them into something meaningful for MM3.
* The configuration files are only for system-wide settings. We really also
want to be able to upgrade MM2 lists to MM3 lists, and that involves
unpickling the config.db state and again, mapping the MM2 variables to MM3
variables, which are stored in a database.
Given the two points above it seems that handling the migration from
within Python is the best choice (rather than using Augeas which is C
based or Config::Model which is Perl based). Obviously one wants to use
whatever feature of Python that can ease the process. You seem to be
using configparser in MM3. I dunno if there are any other Python tool
one should look at in helping migration. Maybe one should investigate
this further.
* What about importing archives?
I have tried to find information on how archives are stored in MM2 and
MM3 but failed to find any. What is a good source to learn about this?
There is some moderate beginnings in the 3.0 tree, but none of it is
functional in all likelihood. Take a look at src/mailman/bin/export.py
and src/mailman/commands/cli_import.py.
So those are the files that are supposed to handle migration for which
the project is to make them handle a complete migration from MM2 to MM3?
On another note I have been able to setup a web UI although it took far
longer than 5 minutes as I struggled with problems due to having both
Python 2.7 and 3.2 on my system.
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